1594A/1595A
Super-Thermometer
Technical Guide
159X____tgeng0000
Limited Warranty & Limitation of Liability
Each product from Fluke Corporation (“Fluke”) is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is one year(s) for the thermometer. The warranty
period begins on the date of the shipment. Parts, product repairs, and services are warranted for 90 days. The
warranty extends only to the original buyer or end-user customer of a Fluke authorized reseller, and does
not apply to fuses, disposable batteries or to any other product, which in Fluke’s opinion, has been misused,
altered, neglected, or damaged by accident or abnormal conditions of operation or handling. Fluke warrants
that software will operate substantially in accordance with its functional specications for 90 days and that it
has been properly recorded on non-defective media. Fluke does not warrant that software will be error free or
operate without interruption. Fluke does not warrant calibrations on the Super-Thermometer.
Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers only
but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is available if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable international price. Fluke reserves the right to invoice Buyer for importation costs of repairs/replacement parts when
product purchased in one country is submitted for repair in another country.
Fluke’s warranty obligation is limited, at Fluke’s option, to refund of the purchase price, free of charge repair,
or replacement of a defective product which is returned to a Fluke authorized service center within the warranty period.
To obtain warranty service, contact your nearest Fluke authorized service center or send the product, with a
description of the difculty, postage, and insurance prepaid (FOB Destination), to the nearest Fluke authorized
service center. Fluke assumes no risk for damage in transit. Following warranty repair, the product will be
returned to Buyer, transportation prepaid (FOB Destination). If Fluke determines that the failure was caused
by misuse, alteration, accident or abnormal condition or operation or handling, Fluke will provide an estimate
or repair costs and obtain authorization before commencing the work. Following repair, the product will be
returned to the Buyer transportation prepaid and the Buyer will be billed for the repair and return transporta-
tion charges (FOB Shipping Point).
THIS WARRANTY IS BUYER’S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE FOR ANY
SPECIAL, INDIRECT, INCIDENTAL. OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF
Fluke Corporation
799 E. Utah Valley Drive • American Fork, UT 84003-9775 • USA
Phone: +1.801.763.1600 • Telefax: +1.801.763.1010
E-mail: support@hartscientic.com
www.hartscientific.com
Specications subject to change without notice. • Copyright © 2008 • Printed in USA
Table of Contents
1 Before You Start .................................................................................... 1
1.1 Symbols Used ............................................................................................................1
1.2 Safety Information ......................................................................................................1
1.2.1 WARNINGS .......................................................................................................................1
1.2.2 CAUTIONS ........................................................................................................................2
1.3 Authorized Service Centers .......................................................................................2
2 Introduction and Specications .......................................................... 5
2.1 Introduction ................................................................................................................5
2.2 Specifications ............................................................................................................5
2.2.1 General ..............................................................................................................................5
2.2.2 Primary Specifications.......................................................................................................6
2.2.2.1 Resistance Ratio Accuracy.......................................................................................................6
2.2.2.2 Resistor Stability .......................................................................................................................6
2.2.2.3 Absolute Resistance Accuracy.................................................................................................7
2.2.2.4 Measurement Current Accuracy ...............................................................................................7
2.2.3 Ancillary Specifications ..................................................................................................... 8
2.2.3.1 Temperature Measurement Noise .............................................................................................8
2.2.3.2 Relative Measurement Current Accuracy .................................................................................8
2.2.4 General Specifications ...................................................................................................... 9
2.2.5 Applying the Specifications ..............................................................................................9
2.2.5.1 Introduction ...............................................................................................................................9
2.2.5.2 How the Super-Thermometer Measures ...................................................................................9
2.2.5.3 Example 1: Measuring an SPRT .............................................................................................10
2.2.5.4 Example 2: Calibrating an SPRT .............................................................................................12
2.2.5.5 Example 4: Measuring a 100 Ω PRT .......................................................................................13
2.2.5.6 Example 5: Measuring a 10 kΩ Thermistor ............................................................................14
3 Preparation for Operation ................................................................... 15
3.1 Unpacking and Inspection ......................................................................................15
3.2 Instruction Manuals ..................................................................................................15
3.3 Line Voltage and Fuses ...........................................................................................15
3.4 Connecting to Line Power ........................................................................................16
3.5 Placement and Rack Mounting ................................................................................16
4 Front and Rear Panel Features .......................................................... 17
4.1 Introduction ..............................................................................................................17
4.2 Front Panel Features ................................................................................................17
4.2.1 Measurement Inputs .......................................................................................................17
4.2.2 USB Connection .............................................................................................................. 17
4.2.3 Front Panel Keys .............................................................................................................18
4.2.3.1 Front Panel Display .................................................................................................................19
4.3 Rear Panel Features ................................................................................................20
4.3.3.1 External Resistor Inputs ..........................................................................................................20
4.3.1 Scanner Connection ........................................................................................................20
4.3.2 Future Peripheral Connection .........................................................................................21
4.3.3 Remote Operation Connections ...................................................................................... 21
4.3.4 Line Voltage Connection .................................................................................................22
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1594A/1595A Super-Thermometer
4.3.5 Earth Ground Connection ...............................................................................................22
5 Menus and Screens ............................................................................ 23
5.1 Introduction ..............................................................................................................23
5.2 Changing Settings ...................................................................................................23
5.3 Password Protection ................................................................................................24
5.4 Menu Navigation ......................................................................................................24
5.5 Menu System ...........................................................................................................24
5.6 Measurement Screen ...............................................................................................25
5.6.1 Channel Measurement Display .......................................................................................26
5.6.2 Channel Summary Section .............................................................................................. 26
5.6.3 Statistics Fields ...............................................................................................................27
5.6.4 Data/Graph Section .........................................................................................................27
5.6.5 Status and Alert Section .................................................................................................. 27
5.6.6 START/STOP MEASUREMENT (F1) ................................................................................28
5.6.7 SHOW TABLE/GRAPH (F2) ............................................................................................. 28
5.6.8 RESET STATISTICS (F3) ..................................................................................................28
5.6.9 CLEAR GRAPH/CLEAR MESSAGE (F4) .........................................................................28
5.6.10 START/STOP RECORD (F5) ...........................................................................................28
5.7 Main Menu ...............................................................................................................28
5.7.1 CHANNEL SETUP (F1) .................................................................................................... 29
5.7.1.1 ASSIGN PROBE (F1) ..............................................................................................................29
5.7.1.2 CHANNEL SETTINGS (F2)......................................................................................................30
5.7.2 PROBE MENU (F2) .......................................................................................................... 34
5.7.2.1 ADD PROBE (F1) ...................................................................................................................34
5.7.2.2 COPY PROBE (F2) ..................................................................................................................36
5.7.2.3 EDIT PROBE (F3) ....................................................................................................................36
5.7.2.4 READ PROBE (F4) ..................................................................................................................37
5.7.2.5 MANAGE PROBES (F5) .........................................................................................................37
5.7.3 MEASURE MENU (F3) ..................................................................................................... 38
5.7.3.1 SCAN SETTINGS (F1) .............................................................................................................39
5.7.3.2 TIMING SETTINGS (F2) ..........................................................................................................39
5.7.3.3 DIGITAL FILTER (F3) ...............................................................................................................41
5.7.3.4 RECORDING MENU (F4) ........................................................................................................41
5.7.3.5 ZERO-POWER MEASUREMENT (F5) .....................................................................................43
5.7.4 DISPLAY MENU (F4) .......................................................................................................46
5.7.4.1 USER SETTINGS (F1) .............................................................................................................47
5.7.4.2 FIELD SETTINGS (F2) ............................................................................................................48
5.7.4.3 STATISTICS SETTINGS (F3) ....................................................................................................49
5.7.4.4 GRAPH SETTINGS (F4) ..........................................................................................................49
5.7.4.5 TEMPERATURE UNIT (F5) ......................................................................................................50
5.7.5 SYSTEM MENU (F5) ........................................................................................................ 50
5.7.5.1 TIME DATE (F1) ......................................................................................................................50
5.7.5.2 REMOTE INTERFACE (F2) ......................................................................................................51
5.7.5.3 CONFIG (F3) ...........................................................................................................................52
5.7.6 RECALL CONFIG (F2) ..................................................................................................... 53
5.7.7 DELETE CONFIG (F3) ..................................................................................................... 54
5.7.7.1 PASSWORD (F4) .....................................................................................................................54
5.7.7.2 CALIBRATION (F5) .................................................................................................................55
6 Getting Started .................................................................................... 57
6.1 Powering on the Super-Thermometer ......................................................................57
iv
6.2 User Settings Screen ...............................................................................................57
6.3 Connecting a Probe or Resistor ...............................................................................58
7 Making Measurements ....................................................................... 61
7.1 Introduction ..............................................................................................................61
7.2 Measuring a Temperature Probe .............................................................................61
7.3 Scanning Multiple Temperature Probes ...................................................................62
7.4 Measuring Resistance Ratio ....................................................................................62
7.5 Configuring an External Reference Resistor ............................................................62
7.6 Making A Zero-Power Measurement .......................................................................63
8 Remote Operation ............................................................................... 65
8.1 Introduction ..............................................................................................................65
8.2 Configuring the Network (LAN) Port ........................................................................65
8.2.1 Hardware Mac Address ..................................................................................................66
8.2.2 Selecting Dynamic Host Configuration Protocol (DHCP) ................................................66
8.2.3 Setting a Static Internet Protocol (IP) Address ................................................................66
8.2.4 Setting the LAN Gateway Address .................................................................................67
8.2.5 Setting the LAN Subnet Mask .........................................................................................67
8.2.6 Setting the Host Name ....................................................................................................67
8.3 Using the Web Interface ..........................................................................................68
8.4 Configuring the USB Port.........................................................................................68
8.5 Configuring the RS-232 Serial Port ..........................................................................69
8.6 Configuring the IEEE-488 Port .................................................................................69
8.7 Interface Commands ...............................................................................................70
8.7.1 Command Syntax ............................................................................................................ 70
8.7.2 List of Commands ...........................................................................................................70
8.7.3 Descriptions of Commands ............................................................................................. 74
8.7.3.1 *CLS ........................................................................................................................................74
8.7.3.2 *ESE <value> ..........................................................................................................................74
8.7.3.3 *ESR? ......................................................................................................................................74
8.7.3.4 *IDN? ......................................................................................................................................75
8.7.3.5 *RST ........................................................................................................................................75
8.7.3.6 *SRE <value> .........................................................................................................................75
8.7.3.7 *STB? ......................................................................................................................................76
8.7.3.8 CAL:DATE <year>,<month>,<day> .......................................................................................76
8.7.3.9 CAL:PAR:LIN<n> <value> .....................................................................................................76
8.7.3.10 CAL:PAR:RES<n> <value> ....................................................................................................76
8.7.3.11 CAL:PAR:ZERO <value> ........................................................................................................76
8.7.3.12 CALC<n>:AVER:ALL? ............................................................................................................77
8.7.3.13 CALC<n>:AVER:AVER? ..........................................................................................................77
8.7.3.14 CALC[<n>]:AVER:CLEA .........................................................................................................77
8.7.3.15 CALC:AVER:COUN <value> ..................................................................................................77
8.7.3.16 CALC<n>:AVER:MAX? ...........................................................................................................78
8.7.3.17 CALC<n>:AVER:MIN? ............................................................................................................78
8.7.3.18 CALC<n>:AVER:SDEV? ..........................................................................................................78
8.7.3.19 CALC<n>:AVER:SEM? ...........................................................................................................79
8.7.3.20 CALC<n>:AVER:SPR? ............................................................................................................79
8.7.3.21 CALC<n>:AVER:SSIZ? ...........................................................................................................79
8.7.3.22 CALC:AVER:TCON NORM|MOV .............................................................................................79
8.7.3.23 CALC:DELT:CHAN <channel> ...............................................................................................79
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1594A/1595A Super-Thermometer
8.7.3.24 CALC<n>:DELT:DATA? ...........................................................................................................80
8.7.3.25 CALC:DELT:MODE OFFS|CHAN .............................................................................................80
8.7.3.26 CALC:DELT:OFFS <value> .....................................................................................................80
8.7.3.27 CALC<n>:TYPE TEMP|RES|RAT .............................................................................................80
8.7.3.28 DATA:REC:ALL <boolean> .....................................................................................................80
8.7.3.29 DATA:REC:FILE <name> ........................................................................................................81
8.7.3.30 DATA:REC:MEM INT|USB|BOTH .............................................................................................81
8.7.3.31 DATA:REC[:STAT] <boolean> .................................................................................................81
8.7.3.32 DISP:ALER:CLEA ....................................................................................................................81
8.7.3.33 DISP:ALER[:READ]? ...............................................................................................................81
8.7.3.34 DISP:DATE:FORM YMD|DMY|MDY .........................................................................................81
8.7.3.35 DISP:DEC:FORM PER|COMM ................................................................................................81
8.7.3.36 DISP:FIEL:FEED<n>? ............................................................................................................81
8.7.3.37 DISP:FIEL:MEM <n> ..............................................................................................................82
8.7.3.38 DISP:FIEL:MEM<n1>:FEED<n2> <feed> .............................................................................82
8.7.3.39 DISP:HELP <boolean> ...........................................................................................................82
8.7.3.40 DISP:LANG ENGLISH|CHINESE|JAPANESE|SPANISH|GERMAN|FRENCH|RUSSIAN ...........82
8.7.3.41 DISP:TEMP:DIG <digits> ........................................................................................................82
8.7.3.42 DISP:WARN:DUE <boolean> .................................................................................................82
8.7.3.43 DISP:WARN:ITS <boolean> ...................................................................................................83
8.7.3.44 FETC? <channel> ...................................................................................................................83
8.7.3.45 INIT:CONT <boolean> ............................................................................................................83
8.7.3.46 INIT:STOP:BEEP <boolean> ...................................................................................................83
8.7.3.47 INIT:STOP:DUR <value> .........................................................................................................83
8.7.3.48 INIT:STOP[:STAT] <boolean> .................................................................................................84
8.7.3.49 INIT:STOP:TIME?.....................................................................................................................84
8.7.3.50 INP<n>:CURR <current> .......................................................................................................84
8.7.3.51 INP<n>:CURR:DATA? .............................................................................................................84
8.7.3.52 INP<n>:CURR:STAN <boolean> ............................................................................................84
8.7.3.53 INP:PROB:ADD <id> ..............................................................................................................84
8.7.3.54 INP:PROB:COUN? ..................................................................................................................85
8.7.3.55 INP:PROB:DEL <id> ...............................................................................................................85
8.7.3.56 INP:PROB:FIRS? .....................................................................................................................85
8.7.3.57 INP<n>:PROB:IDEN <id> ......................................................................................................85
8.7.3.58 INP:PROB:NEXT?....................................................................................................................85
8.7.3.59 INP:PROB:PAR <id>,<name>,<value> ..................................................................................86
8.7.3.60 INP:PROB:TEST? <id>,<resistance> .....................................................................................87
8.7.3.61 INP:REAR<n>:RS:IDEN <id>|VAR|NONE ...............................................................................87
8.7.3.62 INP:RS:ADD <id> ...................................................................................................................88
8.7.3.63 INP:RS:COUN? .......................................................................................................................88
8.7.3.64 INP:RS:DEL <id> ....................................................................................................................88
8.7.3.65 INP:RS:FIRS? ..........................................................................................................................88
8.7.3.66 INP<n>:RS:IDEN <id>|VAR|NONE .........................................................................................88
8.7.3.67 INP:RS:NEXT? .........................................................................................................................89
8.7.3.68 INP:RS:OVEN:STAB? ..............................................................................................................89
8.7.3.69 INP:RS:PAR <id>,<name>,<value> .......................................................................................89
8.7.3.70 INP<n>:RS:ROUT <source> ..................................................................................................89
8.7.3.71 ROUT:CLOS <channel> .........................................................................................................90
8.7.3.72 ROUT:CLOS:STAT? .................................................................................................................90
8.7.3.73 ROUT:SCAN <channel list> ....................................................................................................90
8.7.3.74 ROUT:SCAN:ADD <channel list> ...........................................................................................91
8.7.3.75 ROUT:SCAN:ALT <boolean> ..................................................................................................91
8.7.3.76 ROUT:SCAN:DEL <channel list> ............................................................................................91
8.7.3.77 ROUT:SCAN:REF <channel> ..................................................................................................91
8.7.3.78 ROUT:SCAN:REP <value> ......................................................................................................91
8.7.3.79 ROUT:SCAN:STAT <boolean> ................................................................................................92
vi
8.7.3.80 SENS:APER[:DISP] <time> .....................................................................................................92
8.7.3.81 SENS:APER:PRES NORM|PREC|FAST|LONG ........................................................................92
8.7.3.82 SENS:APER:SAMP <time> .....................................................................................................92
8.7.3.83 SENS:AVER1[:STAT] <boolean> .............................................................................................92
8.7.3.84 SENS:AVER2[:STAT] <boolean> .............................................................................................93
8.7.3.85 SENS:AVER2:COUN <count> ................................................................................................93
8.7.3.86 SENS:AVER2:CLEA .................................................................................................................93
8.7.3.87 SENS[<n>][:FRES]:DATA? ......................................................................................................93
8.7.3.88 SENS[<n>]:RRAT:DATA? .........................................................................................................93
8.7.3.89 STAT:OPER? ............................................................................................................................94
8.7.3.90 STAT:OPER:COND? ................................................................................................................94
8.7.3.91 STAT:OPER:ENAB <value> .....................................................................................................94
8.7.3.92 STAT:QUES? ............................................................................................................................94
8.7.3.93 STAT:QUES:COND? ................................................................................................................94
8.7.3.94 STAT:QUES:ENAB <value> .....................................................................................................94
8.7.3.95 SYST:BEEP[:IMM] ...................................................................................................................95
8.7.3.96 SYST:BEEP:KEY <boolean> ...................................................................................................95
8.7.3.97 SYST:BEEP:ALER <boolean> .................................................................................................95
8.7.3.98 SYST:CODE:VERS? .................................................................................................................95
8.7.3.99 SYST:COMM:GPIB:ADDR <value> .........................................................................................95
8.7.3.100 SYST:COMM:GPIB[:STAT] <boolean> ....................................................................................95
8.7.3.101 SYST:COMM:GPIB:TERM LIN|RET .........................................................................................95
8.7.3.102 SYST:COMM:SER:BAUD <value> ..........................................................................................95
8.7.3.103 SYST:COMM:SER:LIN <boolean> ..........................................................................................95
8.7.3.104 SYST:COMM:SOCK:ADDR <IP address> ..............................................................................95
8.7.3.105 SYST:COMM:SOCK:CONT OFF|ON|QUER.............................................................................96
8.7.3.106 SYST:COMM:SOCK:DHCP <boolean> ...................................................................................96
8.7.3.107 SYST:COMM:SOCK:GAT <IP address> .................................................................................96
8.7.3.108 SYST:COMM:SOCK:KEEP <seconds> ...................................................................................96
8.7.3.109 SYST:COMM:SOCK:MAC?......................................................................................................97
8.7.3.110 SYST:COMM:SOCK:MASK <IP address> ..............................................................................97
8.7.3.111 SYST:COMM:SOCK:NAME <name> ......................................................................................97
8.7.3.112 SYST:COMM:USB[:STAT] <boolean> .....................................................................................97
8.7.3.113 SYST:CONF:CHAN? ................................................................................................................97
8.7.3.114 SYST:CONF:SCAN? ................................................................................................................97
8.7.3.115 SYST:DATE <year>,<month>,<day> ......................................................................................97
8.7.3.116 SYST:ERR? ..............................................................................................................................98
8.7.3.117 SYST:KLOC <boolean> ..........................................................................................................98
8.7.3.118 SYST:PASS:CDIS .....................................................................................................................98
8.7.3.119 SYST:PASS:CEN <password> ................................................................................................98
8.7.3.120 SYST:PASS:CEN:STAT? ...........................................................................................................99
8.7.3.121 SYST:PASS:GROU:MEAS <boolean> .....................................................................................99
8.7.3.122 SYST:PASS:GROU:PROB <boolean> .....................................................................................99
8.7.3.123 SYST:PASS:GROU:RES <boolean> ........................................................................................99
8.7.3.124 SYST:PASS:GROU:TIME <boolean> ......................................................................................99
8.7.3.125 SYST:PASS:NEW <current password>,<new password> ......................................................99
8.7.3.126 SYST:PON:MIN? ......................................................................................................................99
8.7.3.127 SYST:TIME <hour>,<minute>,<second> ...............................................................................99
8.7.3.128 SYST:TIME:DAYL OFF|NAM|EUR ............................................................................................99
8.7.3.129 TEST:CURR:CONF <channel>,<current>,<polarity> ...........................................................100
8.7.3.130 TEST:CURR[:STAT] <boolean> .............................................................................................100
8.7.3.131 TEST:LIN:ABOR ....................................................................................................................100
8.7.3.132 TEST:LIN:PAR? ......................................................................................................................100
8.7.3.133 TEST:LIN:INIT ........................................................................................................................100
8.7.3.134 TEST:LIN:REP<n>? ...............................................................................................................101
8.7.3.135 TEST:LIN:REP:TIME?.............................................................................................................101
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1594A/1595A Super-Thermometer
8.7.3.136 TEST:LIN[:STAT]? ..................................................................................................................101
8.7.3.137 TEST:LIN:TIME? ....................................................................................................................101
8.7.3.138 TEST:LIN:TOL<n>? ...............................................................................................................102
8.7.3.139 TEST:SYST:ABOR ..................................................................................................................102
8.7.3.140 TEST:SYST:INIT .....................................................................................................................102
8.7.3.141 TEST:SYST:REP[<n>]? ..........................................................................................................102
8.7.3.142 TEST:SYST:STAT? ..................................................................................................................102
8.7.3.143 UNIT:TEMP C|K|F ..................................................................................................................102
9 Calibration ......................................................................................... 103
9.1 Introduction ............................................................................................................103
9.2 SYSTEM TEST (F1) ................................................................................................103
9.3 CURRENT TEST (F2) .............................................................................................103
9.4 RATIO CALIBRATION (F3) .....................................................................................104
9.4.1 WRITE FILE (F1) ............................................................................................................ 106
9.4.2 ADJUST PARAMETERS (F2) .........................................................................................106
9.5 RESISTANCE CALIBRATION (F4) ..........................................................................106
9.5.1 WRITE FILE (F1) ............................................................................................................ 107
9.5.2 ADJUST RESISTOR (F2) ...............................................................................................108
9.6 CALIBRATION PARAMETERS (F5) ........................................................................108
9.6.1 Calibration Interval ........................................................................................................108
9.6.2 Standby Current Check .................................................................................................109
10 Maintenance .......................................................................................111
11 Troubleshooting .................................................................................113
Index ...........................................................................................................115
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Figures
Figure 1 PEM (Power Entry Module) .................................................................................16
Figure 2 Front view ...........................................................................................................17
Figure 3 Front Panel Display .............................................................................................19
Figure 4 Rear view ............................................................................................................20
Figure 5 External Resistor Inputs ......................................................................................20
Figure 6 Power Entry Module ...........................................................................................22
Figure 7 Location Descriptor Example .............................................................................23
Figure 8 Alpha-Numeric Interface ....................................................................................23
Figure 9 Measurement Screen ..........................................................................................26
Figure 10 Channel Setup Screen ......................................................................................29
Figure 11 Probe Menu Screen ..........................................................................................34
Figure 12 Measure Menu Screen ......................................................................................38
Figure 13 Measurement Process Block Diagram .............................................................39
Figure 14 Display Menu Screen........................................................................................46
Figure 15 System Menu Screen ........................................................................................50
Figure 16 Input Wiring ......................................................................................................58
Figure 17 Super-Thermometer Web Interface ..................................................................68
Figure 18 Current meter connection diagram.................................................................103
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1594A/1595A Super-Thermometer
Tables
Table 1 Symbols ..................................................................................................................1
Table 2 Resistance Ratio Accuracy Specifications ............................................................6
Table 3 Resistor Stability Specifications .............................................................................7
Table 4 Absolute Resistance Accuracy Specifications ......................................................7
Table 5 Measurement Current Accuracy Specifications.....................................................8
Table 6 Temperature Measurement Noise Specifications...................................................8
Table 7 Relative Measurement Current Specifications .......................................................8
Table 8 General Specifications ...........................................................................................9
Table 9 Optional Accessories ...........................................................................................15
Table 10 Front panel key descriptions ..............................................................................18
Table 11 Remote Operation Connections .........................................................................21
Table 12 Alert Messages ..................................................................................................27
Table 13 Recommended Reference Resistor for Various Probe Types ............................30
Table 14 Probe Conversion Information ............................................................................35
Table 15 Default Statistical Fields .....................................................................................48
Table 16 Statistical Field Descriptions ..............................................................................48
Table 17 Recommended Reference Resistors and Sensing Current ...............................62
Table 18 Remote Operation Ports ..................................................................................... 65
Table 19 Report Operation Commands ............................................................................ 70
Table 20 Recommended Resistors For Testing The Current ..........................................104
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1 Before You Start
1.1 Symbols Used
Table 1 lists the symbols that may be used on the instrument or in this manual and the meaning of each
symbol.
Table 1 Symbols
Symbol Description Symbol Description
AC (Alternating Current) PE Ground
AC-DC Hot Surface (Burn Hazard)
Before You Start
Safety Information
Battery
Complies with European Union
directives
DC On
Double Insulated Standby Indication
Electric Shock
Fuse C-TICK Australian EMC mark
Ground
Read the User’s Guide
(Important Information)
Off
Canadian Standards
Association
The European Waste Electrical
and Electronic Equipment
(WEEE) Directive (2002/96/EC)
mark.
1.2 Safety Information
This instrument is compliant to EN 61010-1 {2nd Edition}, and CAN/CSA 22.2 No 61010.1-04, Pollution
Degree 2. This instrument is designed for indoor use only. Use this instrument only as specified in this manual.
Otherwise, the protection provided by the instrument may be impaired.
The following denitions apply to the terms “Warning” and “Caution”.
“WARNING” identifies conditions and actions that may pose hazards to the user.
“CAUTION” identifies conditions and actions that may damage the instrument being used.
1.2.1 WARNINGS
DO NOT use this unit in environments other than those listed in the User’s Guide.
Follow all safety guidelines listed in the User’s Guide.
Calibration equipment should only be used by trained personnel.
This instrument can measure extreme temperatures. Precautions must be taken to prevent personal
injury or damage to objects. Probes may be extremely hot or cold. Cautiously handle probes to prevent
personal injury. Carefully place probes on a heat/cold resistant surface or rack until they reach room
temperature.
DO NOT operate near flammable materials.
Use only a grounded AC mains supply of the appropriate voltage to power the instrument.
1
1594A/1595A Super-Thermometer
Authorized Service Centers
DO NOT connect an AC mains supply that does not match the voltage setting on the back of the unit.
DO NOT use this instrument in combination with any probe ( PRT or thermistor) to measure the
temperature or resistance of any device where the probe might come in contact with a conductor that is
electrically energized. Severe electric shock, personal injury, or death may occur.
DO NOT position this instrument in a manner where it is difficult to reach the power cord or power
entry module mains switch. When rack mounting the instrument, ensure the rack power cord and mains
supply switch are accessible.
1.2.2 CAUTIONS
If the instrument is dropped, struck, or handled in a way that causes internal or external physical
damage, immediately unplug the instrument, discontinue use, and contact a Fluke Authorized Service
Center for repair. Do not attempt to disassemble or repair the instrument. Refer repairs or replacement
of components to a Fluke Authorized Service Center.
DO NOT connect AC voltage to any input terminal on the instrument. Permanent damage to the
instrument will result.
1.3 Authorized Service Centers
Please contact one of the following authorized Service Centers to coordinate service on your Fluke product:
Fluke Corporation
799 E. Utah Valley Drive
American Fork, UT 84003-9775
USA
Phone: +1.801.763.1600
Telefax: +1.801.763.1010
E-mail: support@hartscientific.com
Fluke Nederland B.V.
Customer Support Services
Science Park Eindhoven 5108
5692 EC Son
NETHERLANDS
Phone: +31-402-675300
Telefax: +31-402-675321
E-mail: ServiceDesk@fluke.nl
Fluke Int’l Corporation
Service Center - Instrimpex
Room 2301 Sciteck Tower
22 Jianguomenwai Dajie
Chao Yang District
Beijing 100004, PRC
CHINA
Phone: +86-10-6-512-3436
Telefax: +86-10-6-512-3437
E-mail: xingye.han@fluke.com.cn
2
Before You Start
Authorized Service Centers
Fluke South East Asia Pte Ltd.
Fluke ASEAN Regional Office
Service Center
60 Alexandra Terrace #03-16
The Comtech (Lobby D)
118502
SINGAPORE
Phone: +65 6799-5588
Telefax: +65 6799-5588
E-mail: antng@singa.fluke.com
When contacting these Service Centers for support, please have the following information available:
Model Number
Serial Number
Voltage
Complete description of the problem
3
Introduction and Specications
2 Introduction and Specications
2.1 Introduction
The Fluke family of Hart Super-Thermometers long ago established the standard for easy-to-use, precision
temperature measurement instrumentation. Laboratories worldwide have selected the Super-Thermometer
not only for the assurance of achieving high-quality results, but also for the innovative features that increase
productivity in the lab. The Fluke 1594A and 1595A Hart Super-Thermometers continue this legacy adding
new patent pending measurement technology and features that truly are best in class. Below is a summary of
key capabilities and features.
Typical 1595A accuracy 0.2 ppm (0.05 mK), 1594A accuracy 0.8 ppm (0.2 mK)
Sample rates as fast as 1 second
Measures SPRTs, HTPRTs, PRTs, and thermistors
Four input channels on the front panel accept most probe terminations with the patented DWF, gold-
plated, tellurium-copper, quick-connect terminals
Congurable standby current for each input channel minimizes self-heating transients when scanning
between channels
Two input channels on the back panel, dedicated for external standard resistors, keep the front panel
inputs free for Reference Thermometers or Standard Resistors and UUTs
Channel Select Keys above each input channel change color to indicate whether a channel is actively
measuring, in standby, or inactive—pressing a channel key activates the selected channel
Temperature-controlled internal reference resistors allow for traceable temperature and absolute
resistance measurements in ambient conditions from 15 °C to 30 °C
Patent pending, Ratio Self-Calibration performs a linearity check or calibration of the SuperThermometer ratio accuracy without the need of any external equipment
Automated Zero-Power Measurement allows for determination and/or cancellation of a thermometer’s
self-heating error
Updated computer interface with USB control, RS-232, and IEEE-488 included as standard
Ethernet connection allows for remote view of the Super-Thermometer’s display from a web browser
USB memory device on the front panel to accommodate data logging, transfer of probe parameters, and
storage and retrieval of Super-Thermometer user congurations
VGA output allows the Super-Thermometer’s screen to be displayed on a VGA monitor
Selectable operating language: English, Chinese, Japanese, Spanish, French, German, or Russian
Intuitive User Interface makes the Super-Thermometer easy to congure and use right out of the box
Specications
2.2 Specications
2.2.1 General
Current best practices in metrology require uncertainty analyses to be in compliance with the ISO Guide to the
Expression of Uncertainty in Measurement (often referred to as the “GUM”). For convenience, the specica-
tions in this section are listed in k = 2 (95%) coverage and in k = 3 (99%) coverage to allow the user to easily
apply the specications in an uncertainty analysis.
The following specications apply after the standard warm-up period of 30 minutes. The Super-Thermometer
is designed to measure with accuracy and stability without the need for internal auto-cal or zeroing routines.
To realize the full potential of measurement ability, accepted metrology practices such as the use of proper
wiring should be adhered to. In addition, it is important to ensure that the instrument is correctly set up.
The specications are divided into three categories: primary specications, ancillary specications, and general specications.
5
1594A/1595A Super-Thermometer
Specications
Primary Specications: the core set of measurement accuracy specications of the Super-Thermometer. They
are guaranteed for performance verication at the 99% condence level.
Ancillary Specications: additional specications that help the user understand more of the uncertainties
involved in measurement. Since they may be subject to the application and setting in which the Super-Ther-
mometer is used, they are not guaranteed for performance verication but should be considered typical.
General specications: general specications such as measurement range, environmental operating range,
dimensions, etc.
2.2.2 Primary Specications
2.2.2.1 Resistance Ratio Accuracy
Resistance ratio accuracy is the ability of the Super-Thermometer to measure the ratio of two resistances, Rx/
Rs. It is determined primarily by the linearity of the measurement circuit. The following specications apply
for resistance ratios measured with a reference resistor of 25 Ω or 100 Ω using a measurement current of 0.5
mA to 2.0 mA. Other reference resistors are specied using a factor as explained in the following specication table. Performance verication is guaranteed for 99% condence level specications within the specied
operating temperature range of 15°C to 30°C. The listed uncertainties are in terms of parts-per-million (ppm)
of reading unless stated otherwise.
Table 2 Resistance Ratio Accuracy Specifications
Ratio Range
95% condence level, 1-year
0.95 to 1.05 0.24 ppm 0.06 ppm
0.5 to 0.95, 1.05 to 2.0 0.64 ppm 0.16 ppm
0.25 to 0.5, 2.0 to 4.0 0.8 ppm 0.2 ppm
0.0 to 0.25 2.0 x 10
4.0 to 10.0 2.0 ppm 0.5 ppm
99% condence level, 1-year
0.95 to 1.05 0.3 ppm 0.075 ppm
0.5 to 0.95, 1.05 to 2.0 0.8 ppm 0.2 ppm
0.25 to 0.5, 2.0 to 4.0 1.0 ppm 0.25 ppm
0.0 to 0.25 2.5 x 10
4.0 to 10.0 2.5 ppm 0.63 ppm
†
Specications are in terms of absolute ratio
All specications listed in this table apply when using a 25 W or 100 W
reference resistor. Multiply stated specications by a factor of 2 when using a
10 W reference resistor with sensing current between 1 and 5 mA, and a factor
of 10 when using a 1 W reference resistor with sensing current between 5 and
20mA. When using a 10 kohm reference resistor, internal or external, use the
Absolute Resistance Accuracy specication in Table 4.
1594A Accuracy
(ppm of reading)
–07 †
–7 †
1595A Accuracy
(ppm of reading)
–8 †
5.0 x 10
–8 †
6.3 x 10
2.2.2.2 Resistor Stability
Resistor stability characterizes the ability of the instrument to accurately compare two similar resistances
within some time period using the internal resistors as references. The following specications apply using the
given reference resistor over a one-minute average. The specications assume typical laboratory conditions,
which do not include transportation and large ambient temperature uctuations.
Resistance stability is determined by the short-term stability of the internal reference resistors and control
stability of the temperature stabilizing block. It does not include measurement noise.
6
Table 3 Resistor Stability Specifications
Resistor (Rs) Accuracy (ppm of reading),
95% condence level
24 hours 30 days
1W 5 ppm 10 ppm
10W 0.5 ppm 2 ppm
25W 0.25 ppm 1 ppm
100W 0.2 ppm 1 ppm
10kW 0.25 ppm 1 ppm
2.2.2.3 Absolute Resistance Accuracy
Absolute resistance accuracy is the ability of the instrument to measure absolute resistance, Rx, using the
internal reference resistors. The following specications apply using the given reference resistor, Rs, and
excitation current.
The 1-year specications include calibration uncertainty, reference resistor drift, ambient temperature sensitivity, resistance ratio uncertainty, and measurement noise using 1-minute average and a 2-second sample period
(n = 30).
Performance verication is guaranteed for 99% condence level, 1-year specications within the specied
operating temperature range of 15°C to 30°C, maintaining a calibration interval of 6 months for the rst year
and 1 year thereafter.
Introduction and Specications
Specications
Table 4 Absolute Resistance Accuracy Specifications
Resistance range (Rs, current) Accuracy (ppm of reading)
95% condence level, 1-year
0W to 1.2W (1W,10mA) Greater of 40 ppm or 0.000012W
0W to 12W (10W,3mA) Greater of 10 ppm or 0.000024W
0W to 120W (25W, 1mA) Greater of 5 ppm or 0.000024W
0W to 400W (100W, 1mA) Greater of 4 ppm or 0.00008W
0 W to 10 kW (10 kW, 10mA) Greater of 5 ppm or 0.000012kW
10 kW to 40 kW (10 kW, 10mA)
40 kW to 100 kW (10 kW, 2mA)
100 kW to 500 kW (10 kW, 1mA)
99% condence level, 1-year
0W to 1.2W (1W, 10 mA) Greater of 50 ppm or 0.000015W
0W to 12W (10W, 3 mA) Greater of 13 ppm or 0.00003W
0W to 120W (25W, 1 mA) Greater of 6.3 ppm or 0.00003W
0W to 400W (100W, 1 mA) Greater of 5 ppm or 0.0001W
0 kW to 10 kW (10kW, 10mA) Greater of 6.3 ppm or 0.000015 kW
10 kW to 40 kW (10kW, 10mA)
40 kW to 100 kW (10kW, 2mA)
100 kW to 500 kW (10kW,1 mA)
8 ppm
20 ppm
80 ppm
10ppm
25ppm
100ppm
2.2.2.4 Measurement Current Accuracy
Measurement current accuracy is guaranteed to meet the following specications. The specications are stated
as percent of selected current or in absolute mA.
7
1594A/1595A Super-Thermometer
Specications
Table 5 Measurement Current Accuracy Specifications
Current Range Accuracy
99% condence level, 1-year
0.001 mA to 0.005 mA 0.00005 mA
0.005 mA to 0.02 mA 1 %
0.02 mA to 0.2 mA 0.5 %
0.2 mA to 2 mA 0.2 %
2 mA to 20 mA 0.5 %
2.2.3 Ancillary Specications
2.2.3.1 Temperature Measurement Noise
Temperature measurement noise indicates typical measurement noise in temperature measurements. The speci-
cations below are given for averages taken over a period of 1 minute with a 2-second sample rate. The effect
of noise may be reduced for longer averages or may be greater for shorter averages.
Noise performance is dependent upon many conditions. Some of the most important things to consider are the
type of thermometer, setup, and environmental conditions such as electromagnetic interference.
Due to the subjective nature of measurement noise, it is not a guaranteed specication. The specications
listed in the table below are obtainable in a typical laboratory environment. It is important that the user make
their own evaluation of measurement noise in the application and environment where the Super-Thermometer
is used.
Table 6 Temperature Measurement Noise Specifications
Standard Error
Conditions (Rs, Current)
Typical performance
25W SPRT at 0°C (25W, 1.0 mA) 0.00002
25W SPRT at 420°C (25W, 1.0 mA) 0.00006
100W PRT at 0°C (100W, 1.0 mA) 0.00001
100W PRT at 420°C (100W, 1.0 mA) 0.00003
10 kW Thermistor at 25°C (10 kW, 10 mA) 0.000003
of the Mean, °C
2.2.3.2 Relative Measurement Current Accuracy
Zero-Power resistance values are calculated based on measurements taken at two levels of excitation current
that differ by a factor of 1.4142. Only the portions of the errors in the currents that are uncorrelated contribute
to error in the zero-power resistance value.
The following specications may be used to estimate the contribution of current error in zero-power resistance
measurements.
Table 7 Relative Measurement Current Specifications
Range Relative Accuracy, mA
99% condence level
0.001 mA to 0.1 mA 0.0008
0.1 mA to 2 mA 0.003
2 mA to 20 mA 0.03
8
2.2.4 General Specications
Table 8 General Specifications
Warm-up period 30 minutes
Measurement range 0W to 500 kW
Measurement current range 0.001 mA to 20 mA
Measurement current reversal interval:
Sample period of 1 second or 2 seconds
Sample period of 5 second or 10 seconds
Standby current range 0.001 mA to 2 mA
AC power 100 V to 230 V (±10%)
Fuse Rating 2 A – T – 250 V
Specied operating temperature 15°C to 30°C
Absolute operating temperature 5°C to 40°C
Storage temperature 0°C to 40°C
Operating relative humidity, 5°C to 30°C 10% to 70%
Operating relative humidity, 30°C to 40°C 10% to 50%
Storage relative humidity 0% to 95%, non-condensing
Maximum operating altitude 3000m
Dimensions:
Height
Width
Depth (with handles)
Depth (without handles)
Weight
Introduction and Specications
Specications
0.2 second
1.2 second
50 or 60 Hz
147 mm (5.8 in)
439 mm (17.3 in)
447 mm (17.6 in)
406 mm (16.0 in)
7.3 kg (16.0 lb)
2.2.5 Applying the Specications
2.2.5.1 Introduction
The purpose of this section is to help the user apply the specications in measurement scenarios for which
the Super-Thermometer was designed. The following uncertainty calculation examples may not include all
uncertainties that are present in a measurement. Be sure to follow current best practices in uncertainty analysis
to correctly calculate measurement uncertainty.
2.2.5.2 How the Super-Thermometer Measures
In order to understand how to apply the specications, it is important to know how the Super-Thermometer
measures. The fundamental measurement of the Super-Thermometer is the resistance ratio. It is the ratio
between an unknown resistance (Rx) and a reference resistor (Rs) – either internal or external. If a resistance
measurement is needed, the ratio is multiplied by the value of the reference resistor to calculate the resistance
of the Rx resistor (for more information refer to Measurement Timing in the Menus and Screens section).
If a temperature reading is required, the Rx resistance value is used to calculate the temperature using the calibration coefcients entered into the Probe Library. When ITS-90 is selected as the temperature conversion, the
Rx resistance is divided by the RTPW (resistance at the triple-point of water) value that is entered in the probe
denition. The resulting value is called W
then applied to W
Since W
is a ratio between a probe’s resistance at temperature (R
T90
to calculate the temperature reading of the probe.
T90
curacy relies primarily on ratio accuracy if both R
Also, this only applies if the RTPW was measured by the Super-Thermometer and entered into the probe
denition.
. The probe calibration coefcients and the ITS-90 equations are
T90
) and its RTPW, W
) and RTPW are measured in close proximity in time.
T90 (Rx
T90
measurement ac-
T90
9
1594A/1595A Super-Thermometer
Specications
When calibrating an SPRT on the ITS-90, the W
This is done by measuring the resistance of the SPRT at a xed-point temperature followed immediately by
measurement of the RTPW. This is repeated for each temperature point. Once again the ratio accuracy of the
Super-Thermometer, applied to each measured resistance, determines the accuracy of the resulting W
2.2.5.3 Example 1: Measuring an SPRT
This section explains how to calculate the uncertainty of a temperature measurement when measuring a
calibrated 25.5 W SPRT at 157 °C, using the internal 25 W reference resistor in a 1595A. Since the SuperThermometer measurement accuracy is directly related to other sources of uncertainty, additional uncertainties
will be included in the calculation for completeness.
Since an SPRT can be measured with different techniques, two different calculations will be presented to represent the most common and recommended techniques.
2.2.5.3.1 Measuring With Updated RTPW
In this example, the RTPW of the SPRT is measured by a 1595A and entered into the SPRT’s probe denition
in the 1595A. Then the SPRT is measured at 157 °C, in temperature mode, using the coefcients entered in the
SPRT probe denition.
As explained above, this measurement technique primarily uses the ratio accuracy of the Super-Thermometer.
It is equivalent to measuring the ITS-90 W
The total uncertainty of this measurement is based on six uncorrelated uncertainties. These uncertainties are:
Resistance ratio accuracy of the 1595A at 157 °C
Measurement noise at 157 °C
Resistance ratio accuracy of the 1595A at 0.01 °C (triple-point of water)
Measurement noise at 0.01 °C
Reference resistor drift
Uncertainty of the triple-point of water cell
The following demonstrate how to calculate and combine the listed uncertainties.
value is measured at required xed-point temperatures.
T90
value and using it to calculate temperature.
T90
T90
value.
2.2.5.3.2 Resistance Ratio Accuracy at 157 °C
The resistance of the SPRT, when measuring at 157 °C, is 41.1 Ω. The ratio of this resistance against the 25
W reference resistor is 1.644. From the resistance ratio accuracy specications of the 1595A, the standard
uncertainty (k = 1) when measuring a resistance ratio of 1.644 is 0.08 ppm. This is converted to temperature
by dividing 0.08 ppm by 1.0 × 106 and then multiplying by 1.644. The result is then divided by W
ity (dW/dT) at 157 °C which is 0.0038 (found on the SPRT calibration report, see tip below). The nal result is
0.000035 °C.
2.2.5.3.3 Measurement Noise at 157 °C
Random error due to measurement noise must be included as an uncertainty. During measurement at 157 °C, it
is observed that the standard error of the mean is 0.000040 °C.
Note: The user must monitor measurement noise and use the actual measured measurement noise in the
uncertainty calculations.
2.2.5.3.4 Resistance Ratio Accuracy at 0.01 °C
Uncertainties related to measuring the RTPW of the SPRT must be included in the analysis. However, RTPW
uncertainties are magnied when applied to uncertainties of temperatures that are above 0 °C. At 157 °C this
magnication is estimated by multiplying RTPW uncertainties by the W
example).
The resistance of the SPRT at the triple-point of water is approximately 25.5 Ω. The resistance ratio against the
25 W reference resistor is then about 1.02. From the resistance ratio accuracy specications of the 1595A, the
standard uncertainty due to linearity while measuring a resistance ratio of 1.02 is 0.03 ppm. This specication
T90
value at 157 °C (1.612 in this
T90
sensitiv-
10
is converted to temperature by dividing 0.03 ppm by 1.0 × 106 and then multiplying by 1.02. The result is then
divided by W
ing by W
2.2.5.3.5 Measurement Noise at 0.01 °C
sensitivity, dW/dT, at 0.01 °C, which is 0.004. The nal result is 0.000008 °C. After multiply-
T90
(1.612), the uncertainty of the RTPW resistance ratio, when applied to 157 °C, is 0.000013 °C.
T90
During measurement of the RTPW, it is observed that the standard error of the mean is 0.0000018 Ω. To
convert this value into temperature, divide by the resistance sensitivity (dR/dT) of the SPRT at 0.01 °C. dR/dT
at 0.01 °C is 0.1 W/°C (see tip below). The result is 0.000018 °C. Multiplying by W
°C.
Tip: Most SPRT calibration reports list the Temperature versus W values of the SPRT in a table.
Typically, the dT/dW value at each temperature will be included in the same table. dR/dT can be
calculated by inverting dT/dW and multiplying by the RTPW of the SPRT. Also, dW/dT can be calculated
by simply inverting dT/dW.
2.2.5.3.6 Uncertainty of the TPW Cell
Uncertainty of the temperature of the triple-point of water cell must also be included. For this example, the
standard uncertainty of the triple-point of water cell is 0.000050 °C. Multiplying by W
0.000081 °C.
Introduction and Specications
Specications
(1.612) yields 0.000029
T90
(1.612) results in
T90
2.2.5.3.7 Reference Resistor Drift
Possible drift of the 25 W reference resistor between the TPW measurement and the 157 °C measurement must
be accounted for. To reduce the possible error, both measurements should be taken in close proximity in time.
For this example, the 24-hour stability specication will be used. This requires that both measurements are
taken within the same 24-hour period. The standard uncertainty due to drift of the reference resistor is 0.125
ppm. This is converted to temperature by dividing 0.125 ppm by 1.0 × 106 and then multiplying by 1.612. The
result is then divided by W
2.2.5.3.8 Combining the Uncertainties
sensitivity (dW/dT) at 157 °C which is 0.0038. The result is 0.000053 °C.
T90
At this point, all of the uncertainties can be combined by root-sum-square (RSS) since they are uncorrelated.
Even though the 1595A resistance ratio accuracy is used twice in the calculation, both measurements are considered uncorrelated.
This RSS sum produces a combined standard uncertainty of 0.000115 °C. Multiplying by the coverage factor
(k = 2) results in a total expanded uncertainty of 0.000230 °C.
In this example, it is assumed the SPRT did not drift between the measurements at the TPW and 157 °C. It
may be necessary to add an additional uncertainty that accounts for SPRT drift.
2.2.5.3.9 Measuring With Calibration Report RTPW
In this example, the SPRT is monitored by periodically measuring its RTPW in a TPW cell but the original
RTPW from the SPRT calibration report is entered in the 1595A, not the measured RTPW. This requires a dif-
ferent set of specications to be used in the measurement uncertainty.
The uncertainty of this measurement is based on four uncorrelated uncertainties. These uncertainties are:
Resistance accuracy of the 1595A when measuring the SPRT at 157 °C
Measurement noise at 157 °C
Uncertainty of the SPRT resistance at the triple-point of water
Drift of the RTPW of the SPRT
2.2.5.3.10 Resistance Accuracy at 157 °C
The resistance of the SPRT at 157 °C is 41.1 Ω. Using the 25 Ω internal reference resistor, the 1595A oneyear resistance standard uncertainty is 2.5 ppm. This uncertainty, in terms of temperature, is calculated by rst
dividing 2.5 ppm by 1.0 × 106 then multiplying by 41.1 Ω. The result is then divided by the sensitivity (dR/dT)
11
1594A/1595A Super-Thermometer
Specications
of the SPRT at 157 °C which is 0.1 Ω/°C (see tip above). This results in a standard temperature uncertainty of
0.001028 °C.
2.2.5.3.11 Measurement Noise at 157 °C
During measurement at 157 °C, the standard error of the mean (as reported by the 1595A) is observed to be
0.00004 °C.
Note: The user must monitor measurement noise and use the actual measured measurement noise in the uncertainty calculations.
2.2.5.3.12 Uncertainty of the Calibration Report RTPW
In this example, the RTPW is not measured and entered into the 1595A. The RTPW from the SPRT calibration
report is entered into the 1595A. The standard (k = 1) uncertainty of the RTPW value listed on the calibration
report must be included. In this example, it is 0.0001 °C. As explained in the previous example, all uncertainties related to RTPW must be multiplied by W
0.000161 °C.
2.2.5.3.13 Drift of the RTPW of the SPRT
Since an SPRT tends to drift, the long-term drift should be included as a source of uncertainty. In this example
the SPRT is allowed to drift 0.002 °C. The assumed distribution of this uncertainty is rectangular. To convert
to a standard uncertainty divide by 1.732 (square root of 3). The result, 0.001155 °C, multiplied by 1.612
yields a standard uncertainty of 0.001861 °C.
of the measured temperature. Multiplying by 1.612 yields
T90
2.2.5.3.14 Combining the Uncertainties
At this point, all of the uncertainties can be combined by root-sum-square (RSS) since they are uncorrelated.
The RSS sum produces a combined standard uncertainty of 0.002133 °C. Multiplying by the coverage factor
(k = 2), and rounding, results in a total expanded uncertainty of 0.0043 °C.
2.2.5.4 Example 2: Calibrating an SPRT
As explained in “How the Super-Thermometer Measures” at the beginning of this section, the calibration of an
SPRT is performed by measuring the resistance at some required xed-point temperature and then at the triple-
point of water. The two measurements are combined by division to get a W
based primarily on the ratio accuracy of the Super-Thermometer.
In this example, an SPRT is calibrated at 419.527 °C (FP of Zinc). The RTPW is measured directly afterward.
The uncertainties resulting from the 1595A in this example are:
Resistance ratio accuracy of the 1595A at 419.527 °C
Measurement noise at 419.527 °C
Resistance ratio accuracy of the 1595A at 0.01°C (triple-point of water)
Measurement noise at 0.01°C
Reference resistor drift
The uncertainties in this example are calculated and combined as described in Example 1. However, there is a
slight difference in the reference resistor drift component.
2.2.5.4.1 Reference Resistor Drift
In Example 1, the 24-hour stability specication of the internal 25 Ω is used. This may not be necessary when
calibrating an SPRT. When calibrating an SPRT typically both measurements of W
imity of time (< 8 hours elapsed time). It is possible for the reference resistor drift to be negligible, especially
if the Super-Thermometer is in a stable temperature environment.
value. The uncertainty of W
T90
are taken in close prox-
T90
T90
is
12
To be sure reference resistor drift is correctly estimated, the user should perform a test to determine actual
reference resistor drift over the elapsed time. One way to perform this test is to measure a very stable external reference resistor over the actual time period using the internal reference resistor. If it is not possible to
measure the reference resistor drift, it may be necessary to use the 24-hour stability specication resulting in a
slightly larger total uncertainty. Another alternative is to use an external reference resistor of very low drift.
2.2.5.4.2 Example 3: Measuring Zero-Power Resistance
The purpose of this example is to demonstrate how the Relative Current specication applies when performing
a zero-power measurement. The zero-power uncertainty calculated in this example would be added to the rest
of the uncertainties involved in the measurement as explained in previous examples. The intention of the zeropower measurement is to remove measurement errors due to self-heating of the SPRT.
In this example a 1595A is used to measure a 25 Ω SPRT at the triple-point of water using the Zero-Power
function. The SPRT is measured at nominal current, 1.0 mA and 1.4142 mA (double-power current). In this
example, the self-heating sensitivity of the SPRT in a triple-point of water cell is 0.0024 °C/mA. This was
found by using the Zero-Power function and reading the SELF-HEATING eld in the Zero-Power results
screen. This value will vary signicantly depending on temperature, measurement medium, and probe
construction.
The uncertainties used to calculate zero-power uncertainty are:
Ratio accuracy of the 1595A
Measurement noise
Relative current accuracy of the 1595A
Reference resistor stability
2.2.5.4.3 Resistance Ratio Accuracy at 0.01 °C
The ratio accuracy at 0.01 °C is based on using the internal 25 Ω resistor to measure a resistance of 25.5 Ω.
The 1595A standard uncertainty of resistance ratio is 0.03 ppm. To convert this value to temperature divide by
1.0 × 106 and multiply by 1.02 (Rx/Rs). The result is then divided by 0.004 (W
°C, see above). The nal result is 0.000008 °C.
Introduction and Specications
Specications
sensitivity, dW/dT, at 0.01
T90
2.2.5.4.4 Measurement Noise
The Zero-Power function reports the standard error of the mean of the zero-power value in the STANDARD
ERROR eld. In this example, the standard error of the mean is 0.0000018 Ω. To convert this value into tem-
perature, divide by the resistance sensitivity (dR/dT) of the SPRT at 0.01 °C. dR/dT at 0.01 °C is 0.1 W/°C (see
tip above). The result is 0.000018 °C.
2.2.5.4.5 Relative Current Accuracy
The relative measurement current specications are listed in Table 7 of the Specications section. The standard uncertainty of the measurement current over the range 1.0 mA to 1.4142 mA is 0.0015 mA. This is
converted to temperature by multiplying by the SPRT self-heating sensitivity at 0.01 °C which is 0.0024 °C/
mA. The result is 0.0000036 °C.
2.2.5.4.6 Reference Resistor Stability
Since the individual measurements of the zero-power measurement are taken in close proximity in time, the
drift of the reference resistor is considered negligible.
2.2.5.4.7 Combining the Uncertainties
The uncertainties of the zero-power measurement are combined by RSS with the rest of the uncertainties
involved in the measurement. See the previous examples for the other uncertainties.
2.2.5.5 Example 4: Measuring a 100 Ω PRT
In this example the temperature of a typical 100 Ω PRT is measured at 420 °C with a 1595A. The uncertainties
in the measurement associated with the 1595A are as follows:
Resistance accuracy of the 1595A
Measurement noise at 420 °C
2.2.5.5.1 Resistance Accuracy at 420 °C
First, calculate the 1595A absolute resistance accuracy at 257 Ω (the resistance of the 100 Ω PRT at 420 °C).
The one-year absolute resistance standard uncertainty (k = 1) of the 1594A, using the internal 100 Ω resistor,
is 2.0 ppm. To convert this to an uncertainty in temperature, multiply 2.0 ppm by 1.0 × 106 then multiply by
13
1594A/1595A Super-Thermometer
Specications
257 Ω. Divide the result by the sensitivity of the PRT (dR/dT) at 420 °C. This can be found in the PRT calibra-
tion report. For this example, 0.4 Ω/°C is used. The resulting uncertainty is 0.0013°C.
2.2.5.5.2 Measurement Noise at 420 °C
The noise of the measurement at 420 °C is observed using the Standard Error of the Mean statistic eld of the
1595A. In this example it is 0.00003 °C.
2.2.5.5.3 Combining the Uncertainties
To calculate the entire uncertainty of the measurement, the standard uncertainties from the 1595A should be
combined with the (k = 1) PRT calibration uncertainty at 420 °C. The standard uncertainties are combined by
RSS and then multiplied by the required coverage factor.
2.2.5.6 Example 5: Measuring a 10 kΩ Thermistor
In this example, a 1595A is used to measure a 10 kΩ thermistor probe at 0 °C. The 1595A accuracy, when
measuring the thermistor probe is based on the following:
Resistance accuracy of the 1595A
Measurement noise
2.2.5.6.1 Resistance Accuracy
First, calculate the 1595A absolute resistance accuracy at 26839.94 (the resistance of the 10-k Ω thermistor
probe at 0 °C) when using the 10 k Ω internal reference resistor. The one-year absolute resistance accuracy
is 4 ppm of reading (k = 1). This is converted to temperature by dividing 4 ppm by 1.0 × 106 and multiplying
by 26839.94 Ω. The result is then divided by dR/dt of the thermistor probe at 0 °C which, in this example, is
1244.9 Ω/°C. The nal result is 0.000085 °C.
2.2.5.6.2 Measurement Noise
Measurement noise is best observed by using the Standard Error of the Mean statistics eld of the Super-Thermometer. In this example, the standard error of the mean is 0.000004 °C.
2.2.5.6.3 Combining the Uncertainties
If the thermistor probe is being measured in temperature mode with calibration coefcients, the standard
uncertainty of the calibration (listed on the calibration report) would be combined by RSS with the resistance
accuracy and measurement noise uncertainties.
14
Preparation for Operation
Line Voltage and Fuses
3 Preparation for Operation
3.1 Unpacking and Inspection
The Super-Thermometer is shipped in a container designed to prevent damage during shipping. Inspect the
contents of the container for damage and immediately report any damage to the shipping company. Instruc-
tions for inspection are included in the shipping container.
Table 9 Optional Accessories
Item Model or part number
Rack Mount Kit 1594-RMKT
2590 Scanner 2590
Case 1594-CASE
Carry-handle Kit 1594-HNDL
Extended range test report 1994 (1594A), 1995 (1595A)
3.2 Instruction Manuals
The Super-Thermometer instruction manual set is shipped on DVD. The set includes:
1594A/1595A Super-Thermometer User’s Guide
1594A/1595A Super-Thermometer Technical Guide
The 1594A/1595A Super-Thermometer User’s Guide contains instructions for unpacking and setting up the
instrument. Specications and an overview of Super-Thermometer operation are also included. The User’s
Guide is available in the following languages: English, Chinese, Spanish, Japanese, German, French, and
Russian.
The 1594A/1595A Super-Thermometer Technical Guide contains complete information for setting up and
operating the Super-Thermometer. It also includes instructions for remote operation, calibration and maintenance. The Technical Guide is available in English only.
For ordering a replacement instruction manual DVD contact your local Fluke representative or service center.
All manuals are available online for download in PDF format.
3.3 Line Voltage and Fuses
CAUTION: To prevent possible damage to the instrument, verify the correct fuse is installed for the
selected line voltage setting.
The correct line power fuse and line voltage range was installed at the factory per the conguration that was
ordered. However, it is important to verify the correct fuse value and line voltage setting. The fuse is accessible on the rear panel in the PEM (Power Entry Module). The line voltage setting is shown in the PEM window
(see Figure 1 on page 16) and see Section 2.2, Specications, on page 5 for the fuse rating.
To check or replace the fuse and to verify or change the line voltage setting, refer to Figure 1 on page 16
and proceed as follows:
15
1594A/1595A Super-Thermometer
Connecting to Line Power
1. Disconnect line power.
2. Observe what line voltage setting is displayed in the PEM window. If it is correct, the fuse assembly
will be re-inserted in the same orientation it is removed. Otherwise, it will need to be rotated 180°
before re-insertion.
3. Open the fuse compartment by inserting a screwdriver blade in the slot located at the top of the fuse
compartment and open the PEM door.
4. Use the screwdriver blade to pry out the fuse block by inserting the blade in the slot located at the top of
the fuse block.
5. Remove the fuses from the assembly for replacement or verification. Be sure the correct fuses are
installed.
6. Reinstall the fuse assembly by pushing it back into the PEM while ensuring that the correct line voltage
label is shown in the PEM window. Close the PEM door so it locks in place.
Figure 1 PEM (Power Entry Module)
3.4 Connecting to Line Power
WARNING: To avoid electrical shock, connect the factory supplied three-prong line power cord to a
properly grounded power outlet. Do not use a two-prong adapter or extension cord that will break the
ground connection.
After the line voltage setting and correct fuse are veried, connect the instrument to a properly grounded
three-prong outlet using the provided line voltage cord.
3.5 Placement and Rack Mounting
In general, place the Super-Thermometer in an area free of drafts and excessive electrical noise. Refer to the
specications for environmental requirements.
The Super-Thermometer is designed to be used on a bench-top or installed in a standard width rack with the
optional rack mount kit. For bench-top use it is equipped with hinged, non-slip feet. For rack mount instructions, refer to the rack mount kit instruction manual.
16
Front and Rear Panel Features
Front Panel Features
4 Front and Rear Panel Features
4.1 Introduction
The Super-Thermometer has been designed with several features that help make setup and operation as simple
as possible while still providing many measurement capabilities. This section describes the front and rear
panel features as well as the menu system. Please read this section before operating the instrument.
4.2 Front Panel Features
Figure 2 Front view
4.2.1 Measurement Inputs
4.2.2 USB Connection
Four measurement inputs, channels 1 through 4, are located on the front panel. Some key points concerning
the measurement inputs are:
Current (C1, C2), Potential (P1, P2), and Guard (G) terminals are labeled to facilitate correct connection
(Figure 16 on page 58).
Channels 2 and 4 can also be used as reference resistor (Rs) inputs.
The USB port on the front panel allows a formatted USB memory device to be connected to the Super-Thermometer for saving measurements and settings. The memory device must be Linux compatible and formatted
with the FAT32 le system.
Important: When inserting a USB memory device into the front panel USB port, wait for about 10
seconds to allow the system to recognize the memory device before attempting to write to or read from it.
17
1594A/1595A Super-Thermometer
Front Panel Features
4.2.3 Front Panel Keys
Table 10 Front panel key descriptions
The Power Standby key turns off the display and disables the front panel keys,
sending the system into standby. Power remains applied to some internal
components such as the resistor oven.
When the system is brought out of standby by pressing the Power Standby Key, it
is not necessary to wait the 30-minute warm-up period.
The numeric keys consist of the digits 0 through 9, sign (+/-), and decimal point
(.). These keys are used for entering numeric values.
The arrow keys are used to move the cursor on the display and to navigate lists
The SETUP key is used to directly access the Channel Setup menu for quick
and easy measurement conguration.
The DELETE key is used to delete alpha-numeric characters
The EXP key is used when entering an exponential number for example: 1.0
E-04
The ENTER key is used to save a change or to select an item. When an item is
changed, ENTER must be pressed otherwise the item reverts to its original value
upon exiting.
The MENU key is used to go directly to the Main Menu screen.
The EXIT key is used to exit from a menu or setting. Pressing EXIT will leave an
edit without saving the changes. When entering a number, if EXIT is pressed and
held, the entire number is deleted and the cursor is moved to the leftmost place
in the number eld.
The Function Keys are located below the display and are used to execute the
function displayed directly above them. Function keys are used to select menu
options and in certain cases they are used to toggle a setting shown on the
display.
Pressing any of the four Channel Select Keys will automatically activate the
selected channel and illuminate the Channel Select Key in green. If a channel is
in standby mode, the Channel Select Key is illuminated in amber. If a channel is
inactive,the Channel Select Key is clear.
18
4.2.3.1 Front Panel Display
The Front Panel Display is shown in Figure 3. The display screen is used to show all measurements, menus
and conguration information.
Front and Rear Panel Features
Front Panel Features
Figure 3 Front Panel Display
The default display language is English. The display can be shown in the following language options: English,
Chinese, Spanish, Japanese, German, French, and Russian.
The display language can be changed in the User Settings screen. The User settings screen is displayed, in
English (regardless of language setting), when using a shortcut key sequence that is entered from the Measure-
ment screen. In the Measurement screen (press and hold the EXIT key to return to the Measurement screen),
press and release the ENTER key and then press the SETUP key. Use the Up/Down arrow keys to select the
LANGUAGE conguration eld and then use the Left/Right arrow keys to choose the intended language.
Pressing the ENTER key saves the new selection.
For all other display conguration settings, see Section 5.7.4, DISPLAY MENU (F4), on page 46.
19
1594A/1595A Super-Thermometer
Rear Panel Features
4.3 Rear Panel Features
Figure 4 Rear view
4.3.3.1 External Resistor Inputs
20
Figure 5 External Resistor Inputs
The Rs1 and Rs2 external reference resistor connections are located on the rear panel. The Current (C1, C2),
Potential (P1, P2) and Guard (G) terminals are labeled to facilitate proper connection (see Figure 16 on page
58).
4.3.1 Scanner Connection
The 2590 Scanner connection is a 15-pin socket located on the back panel. It is used to control an optional
scanner. Refer to the scanner manual for connection and setup instructions.
4.3.2 Future Peripheral Connection
A USB peripheral port is intended for future peripheral control.
Note: This port is NOT used for external memory connection. For external memory via USB see Section
4.2.2, USB Connection, on page 17 and Figure 2 on page 17.
4.3.3 Remote Operation Connections
The Super-Thermometer comes equipped with several remote operation connections. See Table 11 for the
remote operation connection descriptions.
Using the LAN connection and a web browser, the user is able to operate the Super-Thermometer remotely via
the provided web interface. The Super-Thermometer serves a page that allows the user to view the display and
control the Super-Thermometer through the web browser. For more information, refer to the Remote Operation section.
Front and Rear Panel Features
Rear Panel Features
Table 11 Remote Operation Connections
Connection
Description
Ethernet connector that allows connection to a
network for controlling the instrument and transmitting
measurements
USB port that allows the instrument to be controlled as a
USB peripheral from a computer
9-pin subminiature D type serial port that can be used to
control the instrument via RS-232
IEEE-488 Input/Output that is compatible with IEEE488 interface and the IEC 625 Bus for controlling the
instrument
21
1594A/1595A Super-Thermometer
Rear Panel Features
4.3.4 Line Voltage Connection
Figure 6 Power Entry Module
The PEM (Power Entry Module) located on the rear panel connects the Super-Thermometer to line voltage. It
contains the Line Voltage Power Switch, the Line Voltage Fuses, and the Line Voltage Selector. See the Line
Voltage and Fuses section for conguration and connection instructions.
4.3.5 Earth Ground Connection
The Earth Ground Connection is provided to allow connection to earth ground. This connection can help im-
prove measurement noise. It is not intended to replace the ground connection provided through the line voltage
cord.
22
Menus and Screens
Changing Settings
5 Menus and Screens
5.1 Introduction
This section provides detailed description of the Super-Thermometer menus and screens. The menus and
screens are designed to allow the user to quickly and easily set up the instrument for measurement while also
providing many conguration options. Note that some function keys are located in multiple locations in the
menu system for convenience.
Since the Super-Thermometer menu system is several layers deep, this section uses a location descriptor at the
introduction of menu function keys. This helps the user identify where the function key resides in the menu
system. Below is a location descriptor example.
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS
Figure 7 Location Descriptor Example
5.2 Changing Settings
Most screens within the menu system contain conguration elds used for changing settings. Whenever a
conguration eld is changed the ENTER key must be pressed to save and apply the new value. To change a
setting, the eld must be highlighted. The highlight can be moved through the elds using the Up/Down arrow
keys.
Conguration elds that have selection options are changed by pressing the Left/Right arrow keys to the
desired setting and pressing ENTER.
Numeric type elds are used for setting numeric settings, which include probe coefcients, time, and date, for
example. Values are set using the digit keys. The left and right arrow keys move among the digits to change a
digit in the number. The sign key and EXP key are necessary for signed and exponential values. The DEL key
may be used to delete a digit in the number. ENTER must be pressed to save a new value.
Some conguration elds allow entry of alpha and numeric characters. For these elds, the Alpha-Numeric
Interface is used. It automatically opens by pressing the ENTER key when a text eld is highlighted.
Figure 8 Alpha-Numeric Interface
23
1594A/1595A Super-Thermometer
Password Protection
In the Alpha-Numeric Interface, use the front panel arrow keys to move the cursor to the desired character.
Press the ENTER key to enter the selected character in the text edit box. Numeric characters can be entered
using the Alpha-Numeric Interface or the front panel digit keys.
If a mistake is made, pressing the DELETE key will backspace over the character to the left of the cursor.
When the cursor is placed over a character in the text edit box, the DELETE key will delete the character
where it is located.
Use function keys MOVE BACK (F1) and MOVE FORWARD (F2) to move the cursor left or right in the text
edit box. Use function keys SAVE (F3) and CANCEL (F5) to save or cancel the changes that have been made
to the text eld. The EXIT key will also exit the Alpha-Numeric Interface with no changes saved.
5.3 Password Protection
Some screens by default are password protected while others may be password protected depending on con-
guration settings. A screen that is password protected will open with edit ability only if a four-digit password
is entered. Otherwise, the screen will open with view only. (see Section 5.7.7.1, PASSWORD (F4), on page
54).
5.4 Menu Navigation
The following are important items to help the user understand how to navigate the menu system:
The Main Menu of the menu system may be accessed from the Measurement Screen (and most other
screens) by pressing the MENU key.
Function Keys (F1, F2, F3, F4, F5) are used to select menus, functions, and in some cases, to toggle
settings.
The EXIT key is used to exit a screen or menu and return to the parent screen. In most screens, pressing
and holding the EXIT key for a moment returns directly to the Measurement Screen.
Menus and screens contain help text that clarify the purpose of the menu or screen.
When any setting is changed in a screen, the ENTER key must be pressed to save the change.
When a eld requires alpha-numeric character input, the Alpha-Numeric Interface opens automatically
upon pressing ENTER when the eld is highlighted.
Some screens may be password protected. If the password is required, a special password screen will
appear. More information concerning password protection is found in the System Menu section.
The SETUP key provides a shortcut to the Channel Setup screen, Section 5.7.1, CHANNEL SETUP
(F1), on page 29.
Pressing ENTER, then SETUP provides a shortcut to the User Settings screen, Section 5.7.4.1, USER
SETTINGS (F1), on page 47, where the language setting and other user settings are located.
The User Settings screen will appear as the initial screen if the Start-Up Help setting is enabled
(see Section 5.7.4.1, USER SETTINGS (F1), on page 47). This assists a rst-time user in setting
preferences and the system clock.
24
5.5 Menu System
The following is an outline of the menu system:
Measurement Screen
|
MAIN MENU (MENU key)
CHANNEL SETUP (SETUP key)
| ASSIGN PROBE (see PROBE MENU below)
| CHANNEL SETTINGS
| | SET UP Rs
| | ASSIGN RESISTOR
| | DEFINE RESISTOR
| | | ADD RESISTOR
| | | EDIT RESISTOR
| | | READ RESISTOR
| | MANAGE RESISTORS
| | READ FILE
| | WRITE FILE
| | MOVE UP
| | MOVE DOWN
| | DELETE RESISTOR
| ON/OFF
| MEASURE MENU (see MEASURE MENU below)
PROBE MENU
| ADD PROBE
| COPY PROBE
| EDIT PROBE
| | TEST CALCULATION
| READ PROBE
| MANAGE PROBES
| READ FILE
| WRITE FILE
| MOVE UP
| MOVE DOWN
| DELETE PROBE
MEASURE MENU
| SCAN SETTINGS
| TIMING SETTINGS
| DIGITAL FILTER
| | CLEAR FILTER
| RECORDING MENU
| | RECORDING SETTINGS
| | VIEW DATA
| | READ FILE
| | WRITE FILE
| | ERASE DATA
| ZERO-POWER MEASUREMENT
DISPLAY MENU
| USER SETTINGS
| FIELD SETTINGS
| STATISTICS SETTINGS
| GRAPH SETTINGS
| TEMPERATURE UNIT
SYSTEM MENU
TIME DATE
REMOTE INTERFACE
| SERIAL
| USB
| NETWORK
| IEEE-488
| ERRORS
CONFIG
| STORE CONFIG
| RECALL CONFIG
| DELETE CONFIG
| RESTORE DEFAULT
| UPDATE FIRMWARE
PASSWORD
CALIBRATION
SYSTEM TEST
CURRENT TEST
RATIO CALIBRATION
RESISTANCE CALIBRATION
CALIBRATION PARAMETERS
Menus and Screens
Measurement Screen
5.6 Measurement Screen
The Measurement Screen contains the function keys and display elds needed for typical measurement operation. It is the screen displayed after power-up unless the Start-Up Help setting is enabled (see Section 5.7.4.1,
USER SETTINGS (F1), on page 47). It may be recalled other screens by pressing and holding the EXIT key
25
1594A/1595A Super-Thermometer
A
Measurement Screen
or by pressing and releasing the MENU key then pressing the EXIT key. The following describe each section
of the Measurement Screen.
B
C
D
Figure 9
Measurement Screen
The following are the different sections of the Measurement Screen (see Figure 9) followed by detailed descriptions of each section:
A. Channel Measurement Display
B. Channel Summary Section
C. Statistics Fields
D. Data/Graph Section
E. Status and Alert Section
5.6.1 Channel Measurement Display
The Channel Measurement Display is located at the top of the screen and shows the most recently completed
measurement and the channel from where the measurement came. This portion of the screen is always visible,
even when other screens and menus are open.
5.6.2 Channel Summary Section
The Channel Summary Section, directly below the Channel Measurement Display, on the left, shows channel
conguration information with the following four elds.
E
26
PROBE ID – shows the identication of the probe denition assigned to the channel being measured (see
Section 5.7.2, PROBE MENU (F2), on page 34)
CURRENT – shows the excitation current used in measuring the probe (see Sensing Current under Section
5.7.1.2, CHANNEL SETTINGS (F2), on page 30
RS – shows the reference resistor used for the measurement (see Section 5.7.1.2, CHANNEL SETTINGS
(F2), on page 30).
OVEN - indicates whether the resistor oven is stable and ready for measurement. After power up, the OVEN
eld will rst indicate “SETTLING” while the oven warms up and settles to the proper temperature. When the
oven temperature is stable, the eld will display “READY” to indicate that the Super-Thermometer is ready
for measurement. It typically takes about 30 minutes for the temperature to settle and the indication to change
to “READY.” If only external reference resistors are used, it is not necessary to wait for the oven to settle.
5.6.3 Statistics Fields
The Statistics Fields section of the display contains user-selectable statistics elds associated with the currently displayed measurement (see Section 5.7.4.2, FIELD SETTINGS (F2), on page 48)
The Statistics Fields are displayed during measurement regardless whether Graph or Data display mode is
selected. The elds are reset when the RESET STATISTICS (F3) function key is selected.
5.6.4 Data/Graph Section
The Data/Graph section displays either a data table for each active channel as it is measured or a graph of each
channel’s measurement trend. The display is toggled from Data to Graph mode by pressing the SHOW DATA/
GRAPH (F2) function.
When the data table is selected, the Up/Down arrow keys are used to scroll through the data table to view
channels off the screen. The data elds are reset when the RESET STATISTICS (F3) function key is selected.
The graph settings are congured in the Graph Settings Screen, see Section 5.7.4.4, GRAPH SETTINGS (F4),
on page 49. The graph window can be congured to display a separate graph for each channel or all chan-
nels on one graph.
Menus and Screens
Measurement Screen
5.6.5 Status and Alert Section
The Status and Alert section resides at the bottom of the display above the function keys. Depending on the
situation, the following are displayed in the Status and Alert section:
Measurement Progress Bar- indicates the progress of the current measurement
Countdown Timer- shows the time remaining before measurement stops. The timer is set in the Timing Set-
tings screen of the Measure menu see Section 5.7.3.2, TIMING SETTINGS (F2), on page 39. If measurement is stopped and restarted, the timer starts over again.
Active Channel- indicates the channel currently being measured. When the measurement is completed, the
measurement value and channel number will appear in the channel measurement display.
Recording Status- indicates whether recording is in progress.
Alert Messages- displays alert messages. Alert messages only appear when the Measurement Screen is dis-
played. See the following table for a list of alert messages. When an alert message is displayed, the CLEAR
MESSAGE (F4) function key may be pressed to clear the message.
Table 12 Alert Messages
Priority Message Description
1 RECORDING ERROR A recording error occurred, such as memory full or USB device was
2 MAXIMUM TEMPERATURE
EXCEEDED
3 ITS-90 SUBRANGE EXCEEDED The measured temperature is outside either of the selected ITS-90
4 RESISTOR DUE FOR CALIBRATION The Rs resistor used for the measurement is due for calibration; as
removed, that prevents further recording.
The measured temperature exceeds the Maximum Temperature
setting specied in the probe denition.
subranges in the probe denition.
specied by the Due Date setting in the resistor denition.
The following function keys are located in the Measurement screen:
27
1594A/1595A Super-Thermometer
Main Menu
5.6.6 START/STOP MEASUREMENT (F1)
The Start/Stop Measurement function key is a toggling function key that starts and stops measurement
sampling.
5.6.7 SHOW TABLE/GRAPH (F2)
The Show Table/Graph function key toggles the display between Graph mode and Data mode.
5.6.8 RESET STATISTICS (F3)
The Reset Statistics function key resets all statistics elds and sample counts.
5.6.9 CLEAR GRAPH/CLEAR MESSAGE (F4)
The Clear Graph/Clear Message function key clears the measurement trend graph. When an alert message is
displayed, this function key changes to Clear Message, which may be used to clear the alert message.
5.6.10 START/STOP RECORD (F5)
The Start/Stop Record function key is a toggling function key that starts and stops recording of measurements
to memory (see Section 5.7.3.4, RECORDING MENU (F4), on page 41).
5.7 Main Menu
The Main Menu is accessed by pressing the MENU key. The Main Menu contains the submenus used for
Super-Thermometer conguration and setup.
28
Figure 6- Main Menu Screen
The submenus located in the Main Menu screen are as follows:
CHANNEL SETUP - for conguring measurement channels and reference resistor settings
PROBE MENU - for assigning probe denitions to measurement channels and managing the Probe Library
MEASURE MENU - for conguring channel scanning, setting measurement timing, conguring the digital
lter and turning recording on and off
DISPLAY MENU - used to congure display settings, and statistics settings as well as selecting temperature
measurement units
SYSTEM MENU - used to congure the remote interface ports, set the system date and time, congure pass-
word settings and calibrate the Super-Thermometer
The following are detailed descriptions of each submenu and its contents.
5.7.1 CHANNEL SETUP (F1)
MAIN MENU |
The Channel Setup menu is used for conguring measurement channels and reference resistor settings. The
Channel Setups screen shows each channel and its settings. Pressing the SETUP key on the front panel will
access the Channel Setup screen directly from any other screen or menu.
For convenience, the MEASURE MENU (F4) function key is included in this menu as well as the Main
Menu. The Measure Menu is described in full detail after the Probe Menu section.
Menus and Screens
Main Menu
Figure 10 Channel Setup Screen
Using the Up/Down arrow keys, the user selects the channel to be congured. Pressing the ON/OFF (F3) function key enables (ON) or disables (OFF) the selected channel. Only one channel can be enabled unless SCAN
ENABLE is set to ON (see Section 5.7.3.1, SCAN SETTINGS (F1), on page 39). A channel that is disabled
will be skipped when SCAN ENABLE is set to ON. A channel can also be enabled by pressing the corre-
sponding Channel Select Key on the front panel.
The following function keys are used to congure the channels.
5.7.1.1 ASSIGN PROBE (F1)
MAIN MENU | CHANNEL SETUP |
The Assign Probe function key allows the user to assign a predened probe denition to the selected channel.
Upon pressing the Assign Probe function key, the Probe Library is displayed. Using the Up/Down arrow keys,
the desired probe denition is highlighted. Pressing ENTER assigns the probe denition to the previously
selected channel. For convenience, the function keys needed for editing the Probe Library are included in the
Assign Probe screen. These function keys are described in detail in the Probe Menu section.
29
1594A/1595A Super-Thermometer
Main Menu
5.7.1.2 CHANNEL SETTINGS (F2)
MAIN MENU | CHANNEL SETUP |
With the desired channel selected in the Channel Setup screen, pressing the Channel Settings function key
opens a screen that allows the user to congure the channel settings. The channel that is being congured is
identied at the top of the Channel Settings screen.
The channel conguration elds are as follows:
REFERENCE RESISTOR (Rs) - identies the reference resistor to be used for measurement. The options
are any of the four internal resistors (1Ω, 10Ω, 25Ω, 100Ω, 10 kΩ) and any user-congured external resistor.
See Table 13 for the recommended reference resistor.
Table 13 Recommended Reference Resistor for Various Probe Types
Probe Type Reference Resistance Sensing Current
25 W SPRT 25 W
100 W PRT or RTD 100 W
2.5 W SPRT 10 W
0.25 W SPRT 1 W
1000 W PRT or RTD 10 kW
Thermistors, 2 kW to 20 kW 10 kW
Thermistors, 20 kW to 100 kW 10 kW
1.0 mA
1.0 mA
5.0 mA
14.14 mA
0.05 mA
0.01 mA
0.002 mA
SENSING CURRENT - the excitation current used for measurement. By default, it is set to the nominal
current value entered in the probe’s denition. However, if the user enters a different sensing current, the new
value will supersede the probe denition.
The 1 x POWER (F2) function key automatically sets Sensing Current to the Nominal Current value established in the probe denition. 2 x POWER (F3) sets Sensing Current to 1.4142 times the nominal current. In
order to protect the device being measured, the current is limited by the Maximum Current setting in the probe
denition.
STANDBY CURRENT- allows current to pass through a probe or resistor even when it is not being actively
measured. This is useful for keeping the probe self-heated so it will need less time to settle when measured.
The magnitude of the standby current is the same as the Sensing Current as long as the Sensing Current is no
greater than 2 mA. If the Sensing Current is greater than 2 mA, the channel’s standby current will remain off
regardless of the Standby Current setting.
Important: All currents are switched off when Measurement is stopped. Also, when Scan Enable is on
(see Scan Enable in Section 5.7.3.1, SCAN SETTINGS (F1), on page 39), only those channels that are
enabled for measurement will have standby current on, depending on the Sensing Current and Standby
Current settings.
Tip: A probe’s sensing element is heated as current passes through it. This effect is called self-heating.
Self-heating causes a probe’s measured temperature to change slightly due to the heat being dissipated.
The measurement error associated with self-heating depends on probe design and the level of
measurement current. To measure the effect of self-heating, use the Zero-Power function in the Measure
Menu, see Section 5.7.3.5, ZERO-POWER MEASUREMENT (F5), on page 43 .
30
CALCULATION - determines the type of reading the channel measurement will display. The options are
RESISTANCE, RATIO and TEMPERATURE. The TEMPERATURE option is available only if a probe denition, congured for temperature measurement, has been assigned to the channel (see Section 5.7.2, PROBE
MENU (F2), on page 34). The Resistance option is not available if the channel’s Reference Resistor (Rs)
setting is set to Variable Resistance.
5.7.1.2.1 SET UP Rs (F1)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS |
Pressing the Set Up Rs function key displays the Rs denition assigned to each Rs input. The Up/Down arrow
keys are used to scroll through the list to select an Rs input for conguration. The following function keys allow the user to congure the Rs input.
5.7.1.2.1.1 ASSIGN RESISTOR (F1)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs |
The Assign Resistor function key opens the resistor denition library. This is a list of Rs congurations that
have been created by the user. The resistor denition library may contain up to 50 resistor denitions. Every
denition in the library must have a unique ID.
Also displayed in the resistor denition library, at the end of the list, are factory default options VARIABLE
RESISTANCE and NO RESISTOR.
The VARIABLE RESISTANCE option is used when the Rs resistance will vary such as when a SPRT is being
used as a reference resistor. When in this mode, measurement output will be in ratio only.
If the NO RESISTOR option is chosen, the Rs Input cannot be used as a reference resistor connection.
5.7.1.2.1.1.1 DEFINE RESISTOR (F2)
Menus and Screens
Main Menu
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs |
The Dene Resistor function key displays the resistor denition library. The displayed function keys are used
to create new Rs resistor denitions or edit denitions stored in the resistor denition library. The following
describe each function key.
5.7.1.2.1.1.2 ADD RESISTOR (F1)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs | DEFINE RESISTOR |
The Add Resistor screen is used to create a new Rs denition using the following conguration elds and
function key.
RESISTOR ID - used to identify the reference resistor. Pressing the ENTER key while the RESISTOR ID
eld is highlighted will open the Alpha-Numeric Interface to allow entry of a unique ID.
RESISTANCE VALUE - the resistance value of the Rs reference resistor. This resistance value is used to
calculate UUT resistance so it is important that it is entered correctly.
MAXIMUM CURRENT - establishes the maximum current allowed to be applied during measurement. This
prevents excessive current from being applied to the reference resistor.
CALIBRATION DATE - used to dene when the reference resistor was calibrated. If not used, the digits can
all be set to zeros.
DUE DATE - used to alert the user when the reference resistor is due for calibration. This is only applicable if
Rs DUE ALERT is enabled in the User Settings screen, see Section 5.7.4.1, USER SETTINGS (F1), on page
47.
SAVE (F1)
The Save function key saves the settings.
CANCEL (F5)
The Cancel function key exits Add Resistor without saving changes.
31
1594A/1595A Super-Thermometer
Main Menu
5.7.1.2.1.1.3 EDIT RESISTOR (F2)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs | DEFINE RESISTOR |
The Edit Resistor function key opens the highlighted Rs denition for editing. The conguration elds are
explained in the Add Resistor section above.
5.7.1.2.1.2 READ RESISTOR (F3)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs | DEFINE RESISTOR |
Read Resistor allows the user to load a pre-congured reference resistor denition from a USB memory
device.
To load a resistor denition, insert a USB memory device that contains a resistor conguration into the front
panel. Allow about 10 seconds for the system to recognize the USB device and then press OK (F5). A list of
resistor denition les stored on the memory device appears on the screen. Scroll through the list using the
Up/Down arrow keys and select the le to be loaded. Press OK (F5) to begin the le transfer. A message will
prompt the user to continue.
Tip: Resistor denition les must be located in a folder named “\159x\resistor” on the USB memory
device. The les must have the extension “.res” and contain resistor denition data in the proper format.
This type of le can be created by using the Write File function, see Section 5.7.1.2.1.3.2, WRITE FILE
(F2), on page 32 in the Manage Resistors menu.
5.7.1.2.1.3 MANAGE RESISTORS (F3)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs |
Rs resistor denitions in the resistor denition library may be added, deleted, or prioritized in the Manage
Resistors menu using the following function keys.
5.7.1.2.1.3.1 READ FILE (F1)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs | MANAGE RESISTORS
The Read File function key allows the user to import an entire set of resistor denitions from a le on a USB
memory device.
Every resistor denition in the resistor denition library must have a unique ID. If a resistor denition in the
library has the same ID as one read from the USB memory device, it will be replaced.
Tip: Resistor denition les must be located in a folder named “\159x\resistor” on the USB memory
device. The les must have the extension “.res” and contain resistor denition data in the proper format.
This type of le can be created by using the Write File function, see Section 5.7.1.2.1.3.2, WRITE FILE
(F2), on page 32 in the Manage Resistors menu.
5.7.1.2.1.3.2 WRITE FILE (F2)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs | MANAGE RESISTORS
The Write File function key in the Manage Resistors menu allows the user to export one resistor denition or
the entire library to a le on a USB memory device.
32
If a resistor was selected in the Manage Resistors screen, that resistor denition will be written to a le. If ALL
RESISTORS was selected, the entire Resistor Library will be written to a le.
The screen shows the name of the le to be written. The user may change the name of the le by pressing
ENTER to open the alpha-numeric editing screen. Finally, the user presses the CONTINUE function key to
write the le. If a USB memory device has not yet been inserted, the user is instructed to do so. Allow about
10 seconds for the system to recognize the USB device before continuning.
Resistor denition les are written to a folder named “\159x\resistor” on the USB memory device and have
the extension “.res”. If the le does not exist, it will be created. If the le already exists and one resistor was
selected, its resistor denition will be appended to the data in the le. If ALL RESISTORS was selected, the
contents of the existing le will be replaced with the resistor denitions in the resistor denition library.
5.7.1.2.1.3.3 MOVE UP (F3)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs | MANAGE RESISTORS
The Move Up function key changes the arrangement of the reference resistors in the resistor denition library
by moving the selected resistor up one position. If the rst resistor is selected or if ALL RESISTORS is se-
lected, there is no action.
5.7.1.2.1.3.4 MOVE DOWN (F4)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs | MANAGE RESISTORS
The Move Down function changes the arrangement of the reference resistors in the resistor denition library
by moving the selected resistor down one position. If the last resistor is selected or if ALL RESISTORS is
selected, there is no action.
Menus and Screens
Main Menu
5.7.1.2.1.3.5 DELETE RESISTOR (F5)
MAIN MENU | CHANNEL SETUP | CHANNEL SETTINGS | SET UP Rs | MANAGE RESISTORS
The Delete Resistor function key may be used to delete a resistor denition from the resistor denition library.
If a resistor was selected in the Manage Resistors screen, that resistor will be deleted. If ALL RESISTORS
was selected, the entire library will be erased.
A message appears prompting the user to conrm the delete operation. The user may press the YES function key to conrm and proceed with deleting the resistor denition or library. Pressing the NO function key
cancels the operation and returns to the Manage Resistors menu. Pressing the EXIT key will also cancel the
operation with no change.
33
1594A/1595A Super-Thermometer
Main Menu
5.7.2 PROBE MENU (F2)
MAIN MENU |
Figure 11 Probe Menu Screen
The Probe Menu contains the function keys needed for editing and managing probe denitions stored in the
Probe Library.
The Probe Library is non-volatile memory inside the Super-Thermometer which contains probe congura-
tion information that is congured and stored by the user. A user can easily program probe parameters into the
Probe Library and quickly assign the parameters to any of the measurement channels.
Tip: Once the probe denitions are programmed into the Probe Library, they can be conveniently copied
to a USB memory device (see Section 5.7.2.5, MANAGE PROBES (F5), on page 37) so they can be
backed up and easily reloaded if needed.
The following are descriptions of each function key in the Probe Menu.
5.7.2.1 ADD PROBE (F1)
MAIN MENU | PROBE MENU |
The Add Probe screen is used to add a new probe denition to the Probe Library. Up to 100 denitions can
be stored in the Probe Library. If the limit has been reached, the user will not be allowed to add more probe
denitions.
The following elds are used to dene a probe conguration:
ID - is the probe ID eld. The user may enter alpha or numeric characters to enter a unique probe ID up to 24
characters in length. Duplicate probe IDs cannot be saved. With the ID eld selected, pressing ENTER will
open the Alpha-Numeric Interface allowing the user to enter the probe ID.
34
TYPE - denes the type of probe. The options are PRT, THERMISTOR, and RESISTOR. The type selected
will determine what other probe conguration elds appear.
Menus and Screens
tC
[]
Main Menu
CALIBRATION DATE - the calibration date of the probe. The digits may be set to zero if the date is
undened.
NOMINAL CURRENT - the sensing current used for measuring the probe. The value entered is the current
used to measure the probe when 1 x Power is selected in the Channel Settings screen. Typical current settings
are 1.0 mA for a 25.5 Ω or 100 Ω PRTs and 0.010 mA for 10 kΩ thermistors (see “Table 13 Recommended
Reference Resistor for Various Probe Types” on page 30).
Caution: Sensing current must be carefully selected. Current that is too high can overheat and possibly
damage a sensor. Refer to the sensor’s manufacturer recommendations when setting the current.
MAXIMUM CURRENT - the maximum allowed sensing current. This setting is used to prevent excessive
current from damaging the sensor. This setting supersedes the Nominal Current setting.
MAXIMUM TEMPERATURE - sets the temperature limit for the probe. When a probe’s measured temperature exceeds this setting, a warning message is indicated on the Measurement screen and an audio alarm is
sounded if the Alert Beep setting is set to ON (see Section 5.7.4.1, USER SETTINGS (F1), on page 47).
CONVERSION - the type of calibration coefcients or characterization used for the probe. The characterization denes how temperature is calculated for a probe. When conversion is set to NONE, measurements will
be in resistance. See the following Probe Conversion Information table for more information.
Table 14 Probe Conversion Information
Type Conversion Coefficients Equations
PRT ITS-90 High Subrange 5 (-38 to 29 °C)
RTPW,a5, b5
High Subrange 6 (0 to 962 °C)
RTPW,a6, b6, c6, d
High Subrange 7 (0 to 660 °C)
RTPW,a7, b7, c7
High Subrange 8 (0 to 420 °C)
RTPW,a8, b8
High Subrange 9 (0 to 232 °C)
RTPW,a9, b9
High Subrange 10 (0 to 157 °C)
RTPW,a10
High Subrange 11 (0 to 30 °C)
RTPW,a11
Low Subrange 1 (13 to 273 K)
RTPW,a1, b1,c1,c2,c3
Low Subrange 2 (24 to 273 K)
RTPW,a2, b2,c1,c2,c3
Low Subrange 3 (54 to 273 K)
RTPW,a3, b3,c1,c2,c3
Low Subrange 4 (-189 to 0 °C)
RTPW,a4, b4
Low Subrange 5 (-38 to 0 °C)
RTPW,a5,b5
PT-100 R0
Use R0 = 100.0 for standard IEC751, ASTM-E-1137 or enter actual
probe R0 for improved accuracy
CVD-ABC R0, A, B, C See CVD literature
CVD-ALPHA R0, ALPHA, DELTA, BETA See CVD literature
POLYNOMIAL C0, C1,….C7
See ITS-90 literature
See IEC-751 or ASTM-E-1137 literature
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i
35
1594A/1595A Super-Thermometer
Main Menu
Type Conversion Coefficients Equations
THERMISTOR R(T) POLYNOMIAL B0, B1, B2, B3
T(R) POLYNOMIAL A0, A1, A2, A3
Note: With ITS-90 conversion, where subranges overlap, the high subrange supersedes the low subrange. If only subrange
5 is used in a probe denition, select subrange 5 for both High Subrange and Low Subrange. If a subrange is set to NONE,
all temperatures will be based on the programmed subrange (alerts in measurement screen inform the user when a dened
ITS-90 subrange is exceeded, see Display Settings submenu in Display Menu).
The following are the Add Probe Screen function keys.
5.7.2.1.1 TEST CALCULATION (F1)
MAIN MENU | PROBE MENU | ADD PROBE |
The Test Calculation function key helps the user verify the probe calibration coefcients were entered correctly. A resistance is entered and a temperature is calculated based on the calibration coefcients. The calculated
temperature is compared with the probe’s calibration report to verify correct coefcient entry.
5.7.2.1.2 SAVE (F2)
MAIN MENU | PROBE MENU | ADD PROBE |
The Save function key saves the newly entered probe information into the Probe Library. Exiting without
selecting SAVE cancels all changes.
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5.7.2.1.3 CANCEL (F5)
MAIN MENU | PROBE MENU | ADD PROBE
The Cancel function key exits the Add Probe screen without saving changes.
5.7.2.2 COPY PROBE (F2)
MAIN MENU | PROBE MENU |
The Copy Probe function key allows the user to create a new probe denition based on an existing denition.
In the Probe Menu screen, select the probe denition to be copied. Press the COPY PROBE (F2) function
key. Update the PROBE ID eld with a unique probe ID. Press the SAVE (F2) function key to save the copied
denition. If a unique ID is not entered, the ID will be appended with a _1 automatically.
5.7.2.3 EDIT PROBE (F3)
MAIN MENU | PROBE MENU |
The Edit Probe screen is used to edit probe denitions that have been entered into the Probe Library. When
Edit Probe is selected, the same probe denition elds found in the Add Probe screen are shown. Refer to Section 5.7.2.1, ADD PROBE (F1), on page 34 for a full description of each eld.
Changes made in the Edit Probe screen are not saved until the SAVE (F2) function key is selected. The EXIT
key or CANCEL (F5) can be selected at any time to exit without saving changes.
36
5.7.2.4 READ PROBE (F4)
MAIN MENU | PROBE MENU |
The Read Probe function key allows the user to read a probe denition from the USB memory device into the
Probe Library.
When a USB memory device, that contains a probe denition le, is inserted in the front panel, the Read
Probe screen displays a list of probe denition les (*.prb) found on the memory device. By scrolling up and
down the list using the arrow keys, the user can select the desired probe denition le. Pressing the ENTER
key (with the le selected) will open the le and display the probe denitions it contains. At this point a probe
denition can be selected and read into the Probe Library by pressing the ENTER key again.
If the selected probe denition in the USB memory device has the same ID as a probe denition that already
exists in the Probe Library, a warning message appears warning that the probe denition in the library will be
replaced. The user may press the YES function key to update the probe denition and exit, or press NO (or the
EXIT key) to return to the Assign Probe screen.
Tip: Probe denition les must be located in a folder named “\159x\probe\” on the USB memory device.
The les must have the extension “.prb” and contain probe denition data in the proper format. This
type of le can be created by using the Write File function in the Manage Probes menu.
Menus and Screens
Main Menu
5.7.2.5 MANAGE PROBES (F5)
MAIN MENU | PROBE MENU |
The Manage Probes screen is used for reading probe denition les from memory, writing denition les to
memory, moving probe denition locations in the Probe Library and deleting probe denitions.
In the Manage Probe screen, the Probe Library is displayed as well as the following function keys.
5.7.2.5.1 READ FILE (F1)
MAIN MENU | PROBE MENU | MANAGE PROBES |
The Read File function key allows the user to read a probe denition le (.prb) from the USB memory device.
A probe denition le may contain multiple probe denition les. The les have to be located in the folder
\159x\probe\ in the memory device and have the extension .prb.
A le is read by inserting a memory device containing a valid probe denition le into the front panel. When
READ FILE (F1) is pressed, a list of all probe les that reside on the memory device is shown. The le is selected by using the using the arrow keys. The le is transferred to the Probe Library upon pressing the ENTER
key and conrming the action.
Important: Any probe denition in the Probe Library that has the same ID as any probe denition in the
memory device will be overwritten.
5.7.2.5.2 WRITE FILE (F2)
MAIN MENU | PROBE MENU | MANAGE PROBES |
The Write File function key exports one probe denition le or the entire Probe Library from the Super-Thermometer to the USB memory device.
When in the Manage Probes screen, select either a single probe denition or ALL PROBES (at the end of
the list). When WRITE FILE (F2) is selected, the name of the le to which the denitions will be written is
displayed. Pressing the ENTER key will open the Alpha-Numeric Interface so the le name can be entered.
Pressing CONTINUE (F1) writes the le to memory.
37
1594A/1595A Super-Thermometer
Main Menu
If the \159x\probe\ folder and .prb le have not been created previously, they will be created automatically
when the le is written. If the .prb le already exists, a newly written probe denition will be appended
into the le. However, if the .prb le already exists and all les are written to memory, the .prb le will be
overwritten.
5.7.2.5.3 MOVE UP (F3)
MAIN MENU | PROBE MENU | MANAGE PROBES |
The Move Up function key changes the order of the probe denitions in the Probe Library by moving the
selected denition up one position until it reaches the top of the list.
5.7.2.5.4 MOVE DOWN (F4)
MAIN MENU | PROBE MENU | MANAGE PROBES |
The Move Down function key changes the order of the probe denitions in the Probe Library by moving the
selected denition down one position until it reaches the bottom of the list (before ALL PROBES).
5.7.2.5.5 DELETE PROBE (F5)
MAIN MENU | PROBE MENU | MANAGE PROBES |
The Delete Probe function key allows the user to delete probe denitions from the Probe Library. If the Probe
Library capacity of 100 denitions has been reached, a probe denition has to be deleted before adding another denition.
A single highlighted probe denition can be highlighted and then deleted or all probe denitions can be deleted if ALL PROBES is selected. A message prompts the user to conrm the delete action before it takes place.
5.7.3 MEASURE MENU (F3)
MAIN MENU |
38
Figure 12 Measure Menu Screen
The Measure Menu contains the function keys needed for setting up channel scanning, measurement timing,
digital lter settings, controlling measurement recording, and performing zero-power measurements.
The following are complete descriptions of each function key.
5.7.3.1 SCAN SETTINGS (F1)
MAIN MENU | MEASURE MENU |
Scan Settings is used to set up channel scanning. The Super-Thermometer has several scan options that are
congured using the following elds.
SCAN ENABLE- turns scanning on or off by using the Left/Right Arrow Keys and pressing the ENTER key.
ON enables automatic sequencing through all enabled channels. OFF disables scanning so only one channel is
measured as selected by the user.
REPEAT COUNT- determines how many times a channel is measured before the Super-Thermometer continues to the next channel in the scan sequence. The setting has a range of 1 to 100.
ALTERNATE REFERENCE- automatically measures the reference channel after each individual channel is
measured in the scan sequence. This feature is useful in comparison type calibrations when the heat source is
not very stable.
REFERENCE CHANNEL- the setting that determines which channel is the reference channel for Alternate
Reference. The channel chosen for REFERENCE CHANNEL must be enabled (Section 5.7.1, CHANNEL
SETUP (F1), on page 29).
Menus and Screens
Main Menu
5.7.3.2 TIMING SETTINGS (F2)
MAIN MENU | MEASURE MENU |
The Timing Settings screen contains the settings and function keys needed for the conguration of measurement timing. The timing settings control the measurement process and the length of time it takes to produce
and display a measurement.
Measurement Timing Description
The measurement timing settings allow the user to be in control of each phase of the measurement process.
These settings enable the user to optimize timing for different applications.
To help describe the measurement process, it is broken into the following ve steps.
Step 1
Sampling
Defined by:
Sample Period
Figure 13
Measurement Process Block Diagram
1. Sampling - the fundamental measurement of the Super-Thermometer is the resistance ratio. The
fundamental ratio measurement is sampled once per Sample Period.
2. Averaging - the fundamental ratio measurements can be averaged (see Average Enable below) or
passed directly to Filtering. The number averaged is the number of measurement samples taken during
one Display Interval (how often the measurement display is updated). For example, if Sample Period
is set to 2 seconds and Display Interval is set to 10 seconds, 5 ratio measurement samples are averaged
per Display Interval. The display is updated with the statistical mean of the 5 measurement samples.
If AVERAGE ENABLE is OFF, only the most recent ratio measurement sample will be passed to
Filtering.
3. Filtering - after Averaging, the measurement samples can also be processed with a digital filter
(configured by using the Digital Filter function key, Section 5.7.3.3, DIGITAL FILTER (F3), on page
Step 2
Averaging
Enabled with:
Average Enable
Step 3
Filtering
Enabled with:
Digital Filter
Enable
Step 4
Conversion
Defined by:
Probe Conversion
Step 5
Display
Defined by:
Display Interval
39
1594A/1595A Super-Thermometer
Main Menu
41) if the digital filter is ON. If the digital filter is OFF, measurement samples are passed directly to
Conversion.
4. Conversion - after filtering, the fundamental ratio measurement can be converted to the selected unit
of measure such as Temperature (Section 5.7.2.3, EDIT PROBE (F3), on page 36). If RATIO is the
selected unit of conversion, the measurement is passed directly to Display.
5. Display - after conversion, the measurement is sent to the display, remote interface, statistics
calculations, and memory at a rate of once per Display Interval. The statistical mean that is displayed in
the Measurement screen is based on n number of displayed measurements, not number of samples.
The Timing Settings screen contains the following measurement timing elds.
SAMPLE PERIOD - sets the length of time required to obtain a fundamental ratio measurement sample. The
options are 1, 2, 5, and 10 seconds. The default option is 2 seconds.
Note: When the sample period is changed, measurement will stop. It must be restarted by the user.
The 1 second option is useful for applications that require measurements at the highest possible speed, such
as thermal response tests. However, it can be expected to observe greater measurement noise will be greater
when using a 1 second sample period. The 2 seconds option provides good stable measurements for most types
of thermometer probes. The 10 seconds option may yield better results for very high resistances or with probes
that have unusually large settling effects which may be caused by electrical leakage or dielectric absorption.
A probe may be tested for electrical settling by comparing measurements made with the 2 seconds and 10
seconds sample periods.
With the 1 second and 2 seconds options the sensing current is reversed at a basic interval of 0.2 second. With
the 5 seconds and 10 seconds options the current is reversed at a basic interval of 1.2 seconds.
Sample Period cannot be larger than the Display Interval setting.
DISPLAY INTERVAL - determines how often measurements are passed to the display, statistics elds,
memory, and remote interface ports. Possible options are 1, 2, 10, 30, and 60 seconds. The default option is 2
seconds. Changing the Display Interval setting may affect the Sample Period setting, as Sample Period cannot
be greater than Display Interval.
AVERAGE ENABLE - determines whether fundamental measurement samples are averaged before being
passed to the digital lter step. If Average Enable is ON, all fundamental measurements acquired during the
Display Interval are combined by averaging. If Average Enable is OFF, or if Sample Period is the same as
Display Interval, only a single sample, the most recent, is passed to the next step in the measurement process.
The default option is ON.
STOP TIMER ENABLE - enables or disables the stop timer, which stops measurement after a specied
length of time. If Stop Timer Enable is ON, the stop timer begins counting down when measurement is started
using the START MEASUREMENT (F1) function key in the Measurement screen, and stops measurement au-
tomatically when the timer elapses. If STOP TIMER ENABLE is OFF (default setting is OFF), measurement
continues indenitely until the user stops measurement.
When the stop timer is enabled and measurement is enabled, an hourglass symbol and the time remaining, in
hours, minutes, and seconds appears at the bottom of the Measurement screen.
TIMER DURATION - sets the stop timer duration. The value is a number of hours, minutes, and seconds,
ranging from 00:00:01 to 23:59:59. The default value is 01:00:00. This setting is only relevant when Stop
Timer Enable is ON.
40
AUDIO INDICATION - enables or disables the audio alert that tells the user when the stop timer elapses and
measurement stops. The default option is ON.
The Sample Period, Display Interval and Average Enable settings in the Timing Settings menu can be automatically congured by selecting one of the following preset function keys (a full description of each eld can
be found later in this section):
PRESET NORMAL (F1) - is used for most applications. This setting provides a balance between speed and
precision. Sample Period and Display Interval are both set to 2 seconds and Average Enable is set to ON.
PRESET PRECISION (F2) - sets the timing settings for minimal measurement noise and settling error with
most thermometer probes. Sample Period is set to 2 seconds, Display Interval is set to 10 seconds, and Average Enable is set to ON.
PRESET FAST (F3) - is used to congure the Super-Thermometer for the fastest possible measurements.
Sample Period and Display Interval are both set to 1 second. Measurement noise and electrical settling errors
may be greater in Fast mode. Fast mode is useful for certain applications such as probe response time testing.
PRESET LONG (F4) - sets the timings settings for better results with probes that exhibit long electrical set-
tling times. Measurement noise might be slightly higher. Sample period is set to 10 seconds, Display Interval
is set to 10 seconds and Average is set to ON.
5.7.3.3 DIGITAL FILTER (F3)
MAIN MENU | MEASURE MENU |
The Digital Filter screen is used to change the digital lter settings and clear the digital lter buffer.
Digital Filter Description
The digital lter is a moving average lter that computes the arithmetic mean of display measurements stored
in a buffer. The size of the buffer is user-dened via the Average Count setting. If the buffer is full, the oldest
measurement in the buffer is discarded when a new measurement enters the buffer. If the buffer is only partly
lled, the mean is still computed using the limited number of stored measurements.
Menus and Screens
Main Menu
If the digital lter is enabled, the most recent measurement coming from Averaging (see Measurement Sequence Diagram in the previous section) is averaged with the previous display measurements stored in the
digital lter buffer. For example, if Display Interval is set to 10 seconds, and the digital lter average count is
20, a new display measurement is averaged with the previous 19 display measurements for a window size of
200 seconds (n = 20).
The buffer is cleared when measurement is started or if a measurement is out-of-range. This may occur, for
example, if a probe is disconnected from a channel. It may also be cleared by the user at any time using the
CLEAR FILTER (F1) function. This clears the lter for all channels at once.
The Digital Filter conguration settings and function key are as follows:
FILTER ENABLE - enables or disables the digital lter. The default option is ON.
AVERAGE COUNT - sets the number of Display Interval measurements that are averaged by the digital
lter. The setting has a range of 2 through 100. The default value is 30. This setting is only meaningful when
Filter Enable is ON.
5.7.3.3.1 CLEAR FILTER (F1) - clears the lter buffer.
Tip: It is useful to use Clear Filter to clear the digital lter buffer when an abrupt change to the data
has occurred. This allows the ltered measurements to settle more quickly.
5.7.3.4 RECORDING MENU (F4)
MAIN MENU | MEASURE MENU |
In the Recording Menu, the user can control how measurements are recorded to a memory device (external or
internal). This menu is also used for manipulating data les including exporting of data and erasing data.
Measurements may be stored in either of two possible memory devices; Internal Memory or a external USB
Memory Device. Internal memory can store up to approximately 80,000 individual measurements. A USB
ash memory device can typically store an even greater quantity of data, depending on the memory size. Both
types of memory devices are non-volatile, meaning the data is preserved even when the power is switched off.
However, some data may be lost if the power is switched off as data is being written.
41
1594A/1595A Super-Thermometer
Main Menu
Important: Avoid switching power off to the Super-Thermometer while measurement and recording are
in progress or recorded data may be lost.
Measurements are recorded when the START RECORD (F5) function key in the Measurement screen has
been pressed. The Status Bar at the bottom of the Measurement screen indicates if recording is ON or OFF.
Each recorded measurement includes the date and time of the measurement, channel, measured value, and
unit. Additional statistical data is also recorded when the Record Statistics setting is ON.
The data written into internal memory is organized into data sets and each data set is identied by the date and
time of the rst measurement in the set. A new data set is started each time the START RECORDING (F5)
function key is selected if measurement is on. Likewise, a new data set is started each time the START MEASUREMENT (F1) function key is selected if recording is on.
Data is recorded to the USB le in ASCII text, comma separated values (CSV) format, one measurement per
line. Each line is terminated with a carriage return and linefeed. The format of a line of data when the Record
Statistics setting is OFF is as follows:
<measurement value>,<unit>,<channel number>,<date and time>
Example: 231.927562,C,4,2010-01-10 14:23:10
When RECORD STATISTICS is ON, the format is as follows:
<measurement value>,<unit>,<channel number>,<date and time>,<ratio>,<resistance>,<mean>,<std dev>
Example: 231.927562,C,4,2010-01-10 14:23:10,1.89280433,47.318163,231.927848,0.000231
USB les are written to a folder named “\159x\data” on the USB memory device and have the extension
“.txt”. If the le does not exist, it will be created. If the le already exists, new data will be appended to the
data already in the le. For data to be recorded to external memory, a Linux compatible USB memory device
formatted with a FAT32 le system must be inserted into the USB Connection on the front panel.
The following are the Recording Menu function keys.
5.7.3.4.1 RECORDING SETTINGS (F1)
MAIN MENU | MEASURE MENU | RECORDING MENU |
The Recording Settings function key opens a screen that allows the user to view and change settings related to
measurement recording. The conguration elds in the Recording Settings screen are as follows:
MEMORY DEVICE - allows the user to choose which memory device to be written to. The options are
Internal, USB or Both.
USB FILE - is a user-selectable le name to which data is stored on the USB memory device. Upon pressing
Enter, the Alpha-Numeric Interface opens allowing the user to input a le name. The le name extension “.txt”
is automatically appended to the le name.
RECORD STATISTICS - determines whether statistics data is recorded to the memory device along with the
measurement. Additional data recorded when Record Statistics is ON include Resistance Ratio, Resistance,
Statistical Mean, and Standard Deviation. When Record Statistics is ON, the capacity of the memory device,
in terms of number of measurements, is reduced by about a factor of two.
5.7.3.4.2 VIEW DATA (F2)
42
The function key used to Start and Stop Recording is located in the Measurement Menu, Section 5.6.10,
START/STOP RECORD (F5), on page 28.
MAIN MENU | MEASURE MENU | RECORDING MENU |
The View Data function key is used to view measurements that have been recorded into internal memory. The
View Data screen displays the list of datasets recorded in memory. The user pages through the datasets using
the Left/Right Arrow Keys and views data in a dataset using the Up/Down Arrow Keys.
5.7.3.4.3 READ FILE (F3)
MAIN MENU | MEASURE MENU | RECORDING MENU |
The Read File function key allows the user to view measurements that have been recorded in a le on the USB
memory device. If a USB device has not been inserted in the front panel, the user will be prompted to do so.
A list of les appears on the screen and the user selects the le to be opened using the arrow keys and then
opens the le by pressing the ENTER key. When the le is opened, the contents are displayed and the arrow
keys are used to move through the le to view the data.
5.7.3.4.4 WRITE FILE (F4)
MAIN MENU | MEASURE MENU | RECORDING MENU |
The Write File function key is used to copy data from internal memory onto the USB memory device.
The user may select a dataset using the Left and Right arrow keys. ALL DATA (in the DATA SET eld) can be
used to transfer all datasets to the USB device. The USB device lename can be entered by moving the cursor
to the USB FILE eld and pressing the ENTER key to display the Alpha-Numeric Interface.
If the data set and lename have been selected, the user presses CONTINUE (F1) to start the transfer. If the
le already exists, the user will be prompted to continue and append the data to the existing le.
5.7.3.4.5 ERASE DATA (F5)
Menus and Screens
Main Menu
MAIN MENU | MEASURE MENU | RECORDING MENU |
The Erase Data function key is used to erase a selected data set or all data sets, using ALL DATA at the end of
the list, from internal memory. The user may select a data set using the Up/Down arrow keys and pressing the
ENTER key. Upon pressing CONTINUE (F1), a warning message will appear and the user must conrm the
action to continue. Pressing the EXIT key or CANCEL (F2) function key at any point during this process exits
the menu without deleting data.
Important: Do not turn power off while data is being erased because the internal memory les may be
lost.
5.7.3.5 ZERO-POWER MEASUREMENT (F5)
MAIN MENU | MEASURE MENU |
The Zero-Power function key is used for conguring and performing zero-power measurements.
Zero-Power Measurement Description
When measurement current is passed through a temperature probe sensor, the sensor self-heats and creates a
measurement error. Probe self-heating errors vary by probe construction, current levels, and ability of the measurement medium to dissipate heat from the probe. Measurements in air are especially prone to self-heating.
The Zero-Power Measurement function can be used to remove measurement error caused by self-heating. It
can also be used to measure the error due to self-heating.
The Zero-Power Measurement function automatically acquires the measurements necessary to determine a
probe’s zero-power resistance, temperature or ratio. This is done by measuring the probe at two levels of current (nominal current and 1.4142 times nominal) and then using these measurements to calculate the value at
zero-power.
While the Super-Thermometer is performing a zero-power measurement, the timing is set to produce a
measurement every two seconds and the digital lter is disabled. The statistical average is calculated from all
measurements acquired during the Measure Time.
43
1594A/1595A Super-Thermometer
Main Menu
Tip: Zero-Power measurements must be performed in a very stable heat source so temperature drift does
not interfere with the calculation.
Zero-power measurement is performed by rst measuring the probe at nominal current. Then the excitation current is automatically changed to 1.4142 times the nominal current. 1.4142x of the nominal current is
referred to as double power excitation current since the power dissipated is twice that of nominal current. The
zero-power value is then calculated with the following equation:
where is the zero-power value, is the nominal current value, and is the double-power value.
Important: The probe denition must be congured so that the Maximum Current setting is at least
1.4142x the nominal current setting.
An alternative method of zero-power measurement, enabled by the Repeat Nominal setting, adds an additional
nominal current measurement taken after the 1.414x reading. The zero-power value derived from this technique is calculated with the following:
where is the zero-power value, is the rst nominal current value, is the double-power value, and is the nal
nominal current value.
The difference between the rst and nal nominal current readings indicates whether the probe’s temperature
has changed during zero-power measurement. This is important since a change in temperature could introduce
error into the zero-power calculation. When Repeat Nominal is enabled, the Super-Thermometer reports the
difference between the two nominal current values as Drift.
When a zero-power measurement is completed, the results are displayed on the screen and written to memory.
The values displayed are Channel Number, Probe ID, Zero-Power Measurement, Sensing Current, Mean, and
Standard Deviation for each step and the Nominal Current Self-Heating Offset.
The conguration elds and function keys in the Zero-Power Measurement screen are as follows:
CHANNEL - species the channel on which the measurement will be done. Only one channel at a time can be
measured in zero-power mode.
SETTLE TIME - sets the time allowed for measurement settling after a change in current. The value (00:00)
is in minutes and seconds. The settle time needed varies by probe construction and measurement medium. The
default value is 01:00 (1 minute). Measurements taken during Settle Time are discarded.
Tip: Settle time is important since it takes some time for a probe’s temperature to stabilize when the
current level changes. Therefore, it is important to choose a settle time appropriate for the probe and the
measurement environment.
MEASURE TIME - sets the time period over which measurements are averaged for each portion of the zeropower sequence. For example, if a Measure Time of 1 minute is selected, measurements will be taken at each
current level over a 1 minute span and the resulting average will be used in the zero-power calculation. The
number of samples included in the average is based on the Measure Time and the Display Interval setting.
The Measure Time setting is in minutes and seconds. The setting has a range of 00:10 to 10:00. The default
value is 01:00.
REPEAT NOMINAL - enables or disables the Repeat Nominal option mentioned above. When enabled, the
nominal current measurement will be repeated after the 1.4142x measurement.
44
AUDIO INDICATION - enables or disables the Audio Alert feature that alerts the user when the zero-power
measurement sequence is completed.
START (F1) - starts the zero-power measurement sequence
When the START (F1) function key is selected, the zero-power measurement sequence begins and the screen
displays the following elds and function key:
Menus and Screens
Main Menu
CHANNEL - the measurement channel
PROBE - the ID of the probe
TIME REMAINING - the amount of time left to complete the zero-power sequence of measurements in
minutes and seconds (00:00)
STEP - indicates the current measurement step of the sequence
SENSING CURRENT - the sensing current implemented in the measurement step
PHASE - indicates whether measurement is in SETTLING or MEASURING mode
MEAN - the arithmetic mean of the measurements taken in the current step
STD DEV - the standard deviation of the measurements used to calculate the mean
CANCEL (F1) - terminates the zero-power measurement sequence
Once the Zero-Power Measurement sequence is complete, the following results are reported on the screen.
DATE - the date of the measurement
TIME - the time when the measurement nished
CHANNEL - the channel measured
PROBE - the ID of the probe conguration
ZERO-POWER RESULT - the calculated zero-power value
SELF-HEATING - the amount the probe measurement changes due to self-heating
STANDARD ERROR - the resulting standard error of the mean of the zero-power result
DRIFT - indicates the difference between the nominal current measurements (applies only if Repeat Nominal
is enabled)
SENSING CURRENT 1 - the measurement current used in the rst step of the sequence
MEAN 1 - the mean of the measurements in the rst step
STD DEV 1 - the standard deviation of the measurements in the rst step
SENSING CURRENT 2 - the measurement current used in the second step of the sequence
MEAN 2 - the mean of the measurements in the second step
STD DEV 2 - the standard deviation of the measurements in the second step
(the following apply if Repeat Nominal is enabled)
SENSING CURRENT 3 - the measurement current used in the third step of the sequence
MEAN 3 - the mean of the measurements in the third step
STD DEV 3 - the standard deviation of the measurements in the third step
The measurement results can be written to memory by pressing the WRITE FILE (F1) function key. The user
may change the le name by pressing the ENTER key and using the alpha-numeric interface. Once the le
name is set, and after the USB memory device is inserted into the front USB port, the user presses the CONTINUE (F1) function key to proceed to write the le. The le is stored in a folder named “\159x\zero”. If the
le already exists, the new test results are added to the le.
The results of the zero-power measurement are written to the le as follows:
DATE,<date>
TIME,<time>
CHAN,<channel number>
45
1594A/1595A Super-Thermometer
Main Menu
PROBE,<probe ID>
ZERO_MEAS,<corrected measurement>,<unit>
SELF_HEAT,<self heating>,<unit>
STAN_ERR,<standard error>,<unit>
DRIFT,<drift>,<unit>
CURR_1,<current 1>,mA
MEAN_1,<mean 1>,<unit>
SDEV_1,<standard deviation 1>,<unit>
CURR_2,<current 2>,mA
MEAN_2,<mean 2>,<unit>
SDEV_2,<standard deviation 2>,<unit>
CURR_3,<current 3>,mA
MEAN_3,<mean 3>,<unit>
SDEV_3,<standard deviation 3>,<unit>
Note: DRIFT is recorded only if Repeat Nominal is enabled.
VIEW PREVIOUS (F2) - displays the most recent set of zero-power measurement data results
5.7.4 DISPLAY MENU (F4)
MAIN MENU |
46
Figure 14 Display Menu Screen
The Display Menu is used for conguring the display settings, selecting statistics settings and choosing the
displayed temperature measurement units.
5.7.4.1 USER SETTINGS (F1)
MAIN MENU | DISPLAY MENU |
The User Settings screen allows the user to set preferences such as language, temperature measurement resolution, screen saver settings and alert messages.
The User Settings screen will automatically appear as the initial screen if the Start-up Help setting is enabled
(see below). This assists a rst-time user in setting preferences and setting the clock to the local time. The User
Settings screen can also be conveniently reached directly from the Measurement Screen at any time by pressing and releasing the ENTER key and then pressing the SETUP key. When reached this way, it will appear in
English regardless of the language setting.
The following conguration elds are displayed in the User Settings screen.
LANGUAGE - sets the language in which the menus and screens are displayed. The options are ENGLISH,
CHINESE, JAPANESE, SPANISH, GERMAN, FRENCH, and RUSSIAN. ENGLISH is the default option.
DATE FORMAT - sets the format used to display dates on the screen. Available options are YYYY-MM-DD,
MM-DD-YYYY, and DD/MM/YYYY. The default format is YYYY-MM-DD. This setting has no effect on
communications commands and responses, recorded data, or library les.
DECIMAL FORMAT - sets the decimal character used in decimal numbers on the display. Available options
are period (.) and comma (,). The default option is (.). This setting has no effect on communications commands
and responses, recorded data, or library les.
Menus and Screens
Main Menu
TEMPERATURE RESOLUTION - sets the desired number of decimal places that appear in displayed temperature measurements. Available options are 0.1 through 0.000001. The default option is 0.00001. The actual
number of decimal places of displayed temperatures may be reduced for large numbers. This setting has no
effect on communications commands and responses, recorded data, or library les. The resolution of displayed
resistances and resistance ratios is xed at the maximum practical resolution.
SCREEN SAVER ENABLE - enables or disables the screen saver. When the screen saver is enabled (ON),
the display backlight is switched off after the screen saver wait time specied by the Screen Saver Wait set-
ting if no keys are pressed. Pressing any key resets the screen saver wait time and, if the display was blanked,
switches the display on. If Screen Saver Enable is OFF, the display will remain on indenitely. Enabling the
screen saver saves power and extends the lifetime of the display. The default option is OFF.
SCREEN SAVER DELAY - sets the screen saver delay time. Available options are 5 min, 10 min, 15 min, 30
min, 45 min, 1 hr, and 2 hr. The default option is 1 hr. This setting is only relevant when Screen Saver Enable
is ON.
DISPLAY BRIGHTNESS - sets the brightness of the display backlight. Available options are 50 %, 60 %,
70 %, 80 %, 90 %, and 100 %. The default option is 100 %. Reducing the display brightness saves power and
extends the lifetime of the display. In brightly lit environments, the screen may be easier to read when Display
Brightness is set to a higher value.
ITS-90 SUBRANGE ALERT - enables (ON) or disables (OFF) the alert message that appears at the bottom
of the Measurement screen when a temperature measurement from a probe using the ITS-90 Conversion is
more than 10°C outside the range covered by the selected subranges. The default option is ON.
Rs DUE ALERT - enables (ON) or disables (OFF) the alert message that appears at the bottom of the Main
Screen when the due date of a resistor in the Resistor Library is past. The default option is OFF.
ALERT BEEP - enables (ON) or disables (OFF) the audio indication that accompanies alert messages. The
default option is ON.
KEYPAD BEEP - enables (ON) or disables (OFF) the audio indication that accompanies each key-press. The
default option is ON.
START-UP HELP - determines whether the User Settings screen appears automatically after power-on.
When set to ON, the User Settings screen will appear as the rst screen. If the setting is OFF the Measurement
Screen will appear instead. The default option is ON.
47
1594A/1595A Super-Thermometer
()
=−
Main Menu
When the User Settings screen appears after power-on, when the Start-Up Help setting is ON, the User Settings screen includes function key NEXT (F1). This key leads to the Time and Date Settings screen (see Section 5.7.5.1, TIME DATE (F1), on page 50), where the clock may be set to the local time.
5.7.4.2 FIELD SETTINGS (F2)
MAIN MENU | DISPLAY MENU |
The Field Settings function key is used for selecting statistical elds to display in the Measurement Screen. A
particular set of statistical elds can be stored as a set and recalled using the RECALL MEMORY selection.
Four different sets can be stored in Recall Memory, any of which can be restored to factory defaults using the
RESTORE DEFAULT (F1) function key (see Default Statistical Fields table below). Restore Default only affects the Recall Memory selection that is currently display.
Individual statistical elds in any of the Recall Memory sets can be changed by rst selecting the RECALL
MEMORY set number, pressing the ENTER key, arrowing down to the eld to be changed, changing the eld
with the Left/Right arrow keys and pressing the ENTER key save the change. The available data eld options
and their descriptions are listed in the tables below.
Table 15 Default Statistical Fields
Field Memory 1 Memory 2 Memory 3 Memory 4
1 MEAN MEAN MAXIMUM MEAN
2 STD DEV STD DEV MINIMUM STD DEV
3 SE OF MEAN N DELTA TIME
4 RESISTANCE RESISTANCE RESISTANCE DAT E
Table 16 Statistical Field Descriptions
Option Description Equation
n
MEAN arithmetic mean of measurements
STD DEV sample standard deviation of measurements
SE OF MEAN
MAXIMUM maximum measurement
MINIMUM minimum measurement
SPREAD difference between maximum and minimum
N number of measurements (sample size)
DELTA difference relative to a delta channel or offset
RESISTANCE resistance measurement
RATIO resistance ratio measurement
TIME time from the system clock
DAT E date from the system clock
standard error (estimated standard deviation) of the
mean
Mean
StdDev
SE of Mean
SpreadMaximum Minimum
=
=
1
y
∑
i
n
i
=
1
n
n
=
1
1
−
stddev
2
ynMean
−•
∑
i
=
1
i
2
n
As a note of further explanation, SE OF MEAN provides an estimate of the uncertainty (k = 1) of the MEAN
value. SE OF MEAN is calculated from the sample standard deviation of unltered measurements (not the
same as the displayed standard deviation of ltered measurements) and the sample size. The method used to
calculate SE OF MEAN disregards the effect of the digital lter since it causes correlation among displayed
measurements. Otherwise the result of the formula for SE OF MEAN would produce an erroneously low
value.
48
5.7.4.3 STATISTICS SETTINGS (F3)
MAIN MENU | DISPLAY MENU |
The Statistics Settings screen allows the user to set statistics related settings such as the statistics mode to be
used.
STATISTICS MODE – determines the mode in which statistics are used. The options are LIMITED and
UNLIMITED.
In Limited mode, statistics are calculated using a sliding window that is limited in width by the number of
samples dened in the Sample Count setting. The oldest measurement leaves the sliding window buffer when
a new measurement enters.
Unlimited mode allows the number of samples to grow indenitely until the user resets the statistics or stops
measurement.
SAMPLE COUNT - denes the number of samples on which the statistics are based. In LIMITED mode, this
setting denes the width of the sliding window. A maximum of 100 can be selected.
DELTA MODE - determines whether the Delta statistics eld is based on a measurement from a channel or an
offset entered by the user. The options are CHANNEL or OFFSET.
DELTA OFFSET - sets the offset value used for calculating Delta. This setting applies when Delta Mode is
set to OFFSET.
Menus and Screens
Main Menu
When the Delta Offset value is subtracted from a measurement, it assumes the same units as the measurement.
The setting has a range of -1.0E06 to 1.0E06.
Tip: Delta Mode is useful for automatically subtracting an offset from a measurement such as the lead
resistance offset used when making 3-wire measurements.
DELTA CHANNEL- species the channel to be used as the reference for the Delta calculation. This setting is
applicable when Delta Mode is set to CHANNEL. Possible options are channels 1 through 4 when no scanner
is attached. If a scanner is attached, channel 1 is not available but the scanner channels are.
5.7.4.4 GRAPH SETTINGS (F4)
MAIN MENU | DISPLAY MENU |
The Graph Settings function key opens a screen that contains settings for controlling how data graphs appear
in the Measurement Screen in Show Graph mode. The conguration elds in the Graph Settings screen are as
follows:
COMBINED GRAPH - determines if all enabled channels are plotted on the same graph or on separate
graphs. ON plots all channels on the same graph.
TIME SPAN - congures the horizontal time scale or width of the graph window. The options are 5 min, 10
min, 15 min, 30 min, 1 hr, 2 hr, 4 hr, and 8 hr. The default is 10 min.
AUTOMATIC CENTERING - determines whether the center of the vertical axis is set automatically based
on the data in the graph (ON) or if the center is xed at the Vertical Center value (OFF). The default value is
ON.
VERTICAL CENTER - sets the center of the vertical axis of the combined graph when Automatic Centering
is ON. The setting has a range of -1.0E6 to 1.0E6. The default value is 0.0.
AUTOMATIC SCALING - determines whether the scale of the vertical axis is set automatically based on the
data in the graph (ON) or if the scale is xed at the Vertical Scale value (OFF). The default value is ON.
VERTICAL SPAN - sets the scale of the vertical axis of the combined graph when Automatic Scaling is OFF.
The setting has a range of 1.0E-6 to 1.0E6. The default value is 0.1.
49
1594A/1595A Super-Thermometer
Main Menu
TRACE - controls whether a measurement point is plotted with a line that connects to the previous point or as
a separate dot. The options are LINE and DOT. The default value is DOT.
Important: When Time Span is large, multiple points may be combined and drawn as a vertical line to
conserve memory.
5.7.4.5 TEMPERATURE UNIT (F5)
MAIN MENU | DISPLAY MENU |
The Temperature Unit screen allows the user to select the unit for displayed temperature measurements. The
options are °C, K, and °F. °F will not be available if SI Unit Lock is set to ON in the Calibration Parameters
screen of the Calibration menu (see Section 5.7.7.2, CALIBRATION (F5), on page 55). The default value is
°C.
5.7.5 SYSTEM MENU (F5)
MAIN MENU |
50
Figure 15 System Menu Screen
The System Menu contains general system settings such as time and date, remote interface, password, and
calibration.
The System Menu screen displays the following product information: Manufacturer, Model, Serial Number,
Firmware Version, and Calibration Date.
The following are the System Menu function keys:
5.7.5.1 TIME DATE (F1)
MAIN MENU | SYSTEM MENU |
The Time and Date function key allows the user to enter the system Time and Date using the following elds:
TIME - time of the system clock. It is always in 24-hour format.
DATE - date of the system clock. It appears in the format determined by the Date Format setting (see Section
5.7.4.1, USER SETTINGS (F1), on page 47).
DAYLIGHT SAVING - determines whether the clock is automatically adjusted at the beginning and end of
the Daylight Saving period. Options are OFF, NORTH AMERICA, and EUROPE. The default option is OFF.
5.7.5.2 REMOTE INTERFACE (F2)
MAIN MENU | SYSTEM MENU |
The Remote Interface screen contains the function keys used for conguring and monitoring the remote interface ports. For more information on the Remote Interface ports and a list of remote operation commands, see
Section 8, Remote Operation, on page 65.
The following are the function keys located in the Remote Interface menu.
5.7.5.2.1 SERIAL (F1)
MAIN MENU | SYSTEM MENU | REMOTE INTERFACE |
The Serial function key is used to congure the RS-232 serial port with the following conguration elds:
BAUD RATE - baud rate setting of the serial port. It may be set to 1200, 2400, 4800, 9600, 19200, or 38400.
The default setting is 9600.
LINEFEED - determines whether a linefeed character (ASCII code 10) is transmitted at the end of every
message.
Menus and Screens
Main Menu
5.7.5.2.2 USB (F2)
MAIN MENU | SYSTEM MENU | REMOTE INTERFACE |
The USB function key displays the following conguration eld:
PORT ENABLE – enables and disables the rear USB port for remote communications with a computer (The
front USB port, used for an external USB memory device, is always enabled).
5.7.5.2.3 NETWORK (F3)
MAIN MENU | SYSTEM MENU | REMOTE INTERFACE |
The Network function key opens a screen allowing the user to congure the Network port settings.
The network port implements a 10/100 Base T Ethernet network interface. It supports the protocols TCP/IP,
DHCP, and HTML. The port is disabled by default and must be enabled to be used. The user may select DHCP
or specify a static network address.
The network port may be used for remote control of the Super-Thermometer by a PC and interface to network
software such as Telnet or a COM port redirector driver. In this mode, the network port accepts a raw TCP
connection on TCP port number 5025.
The network port also provides a simple HTML web page interface to the Super-Thermometer to allow remote
monitoring via a web browser.
The following are the conguration elds:
HARDWARE MAC - shows the hardware MAC address of the network port. It cannot be changed.
DHCP ENABLE - determines whether the static IP address is used or is assigned dynamically by a server.
The default option is ON (dynamic).
CAUTION: When DHCP is enabled, do not remove the Ethernet cable and turn the power off. The cable
needs to remain plugged into the unit while cycling the power.
IP ADDRESS - species the network port’s IP address when DHCP is OFF, or shows the dynamically assigned IP address when DHCP is set to ON.
GATEWAY - species the gateway server’s IP address to be used when DHCP is OFF.,
51
1594A/1595A Super-Thermometer
Main Menu
SUBNET MASK - species the network’s subnet mask when DHCP is OFF. Gateway and Subnet Mask are
not available when DHCP is set to ON.
HOST NAME - is a name that may be used to identify the Super-Thermometer on the network. It may consist
of a combination of letters and digits, up to 16 characters in length. The rst character must be a letter. Hyphen
characters are allowed within the Host Name string. The default Host Name is “F159X-<serial number>”,
where <serial number> is the unique serial number of the Super-Thermometer.
CONTROL ENABLE - determines whether remote interface commands are accepted via the network port.
The options for this setting are OFF, ON, and QUERY ONLY. When the setting is OFF, the Super-Thermometer will not accept or respond to any commands received from the network port. When the option is ON all
commands are allowed, though some may be password protected. The QUERY ONLY option allows data and
settings to be read but not changed. The default is ON.
Important: When Control Enable is either OFF or QUERY ONLY, the web page will not be fully
functional.
5.7.5.2.4 IEEE-488 (F4)
MAIN MENU | SYSTEM MENU | REMOTE INTERFACE |
The IEEE-488 function key opens the IEEE-488 conguration screen with the following conguration elds:
PORT ENABLE - determines whether the IEEE-488 port is enabled (ON). When the port is disabled, no
communications can occur. The default option is OFF.
ADDRESS - is the IEEE-488 address assigned to the Super-Thermometer. It must be different than all other
equipment on the IEEE-488 bus. The address may be set to any number between 1 and 30 inclusive. The
default setting is 22.
TERMINATION - determines whether a carriage return character (ASCII code 13) or linefeed character
(ASCII code 10) terminates a response. The default option is LINEFEED. An IEEE-488 EOI message also accompanies the nal character of every transmission.
The IEEE-488 port accepts either, or any combination of, a linefeed, carriage return, or EOI as a terminator.
The CLEAR INTERFACE (F1) function key is used to clear the input and output buffers and reset the IEEE488 interface, just as if the IFC or SDC control message was received.
5.7.5.2.5 ERRORS (F5)
MAIN MENU | SYSTEM MENU | REMOTE INTERFACE |
The Errors screen allows the user to view errors stored in the remote interface error queue. They can also be
read using the remot command “SYST:ERR?” (see Section 8, Remote Operation, on page 65)
The screen shows a list of all the errors, with the earliest error at the top. Errors are identied with their queue
position number, error code, and message string. The error queue can hold up to ten errors. If the queue overows with errors, the last error is replaced with a “Queue overow” error message.
The Errors screen contains the CLEAR ERRORS (F1) function key that, when pressed, clears all errors from
the error queue.
52
5.7.5.3 CONFIG (F3)
MAIN MENU | SYSTEM MENU |
The Conguration screen provides the means for storing the instrument conguration and recalling it later.
Several different congurations may be stored to allow quick and easy setup from user to user or from one ap-
plication to another. The following function keys are located in this screen.
5.7.5.3.1 STORE CONFIG (F1)
MAIN MENU | SYSTEM MENU | CONFIG |
The Store Conguration function allows the user to store settings to a conguration le in either internal nonvolatile memory or a USB ash memory device. The following settings are stored:
The probe denition assigned to each channel
Enable state of each channel
Channel settings, including the reference resistor selections
Resistor denition assigned to each reference resistor input
Scan settings
Timing settings
Digital lter settings
User Settings
Statistics elds settings
Statistics settings
Graph settings
Temperature unit
Recording settings
The Store Conguration function does not store probe denitions, resistor denitions, time and date, remote
interface port settings, password settings, calibration parameters, or recorded data.
Menus and Screens
Main Menu
MEMORY DEVICE - species to which memory device the conguration is stored. The options are USB
and INTERNAL. The default option is INTERNAL. Up to 50 conguration les may be stored internally. The
number of les stored on a USB device is limited only by the storage space available.
FILE NAME - species the name of the conguration le. It is edited or entered by rst pressing the ENTER
key, which opens the Alpha-Numeric Interface. The le name may have up to 24 characters. The user must
press the SAVE (F3) function key when nished. If the le does not exist, it is created. If it already exists, the
contents of the le are replaced. The le name extension “.txt” is automatically added to the le name when
the le is created. Once the memory device and le name are selected, the user presses the STORE (F1) func-
tion key to proceed.
USB conguration les are written to a folder named “\159x\cong” on the USB memory device and have the
extension “.txt”. When writing the le to a USB memory device, a formatted USB memory device must be
inserted into the USB socket on the front panel.
5.7.6 RECALL CONFIG (F2)
MAIN MENU | SYSTEM MENU | CONFIG |
The Recall Conguration screen displays the conguration les that have been saved to memory. The location
of the le(s) must be selected using the MEMORY DEVICE eld. The options are INTERNAL and USB.
Once the memory location is selected, pressing ENTER or the CONTINUE (F1) function key will open the
list of conguration les. Using the Up/Down arrow keys, the conguration is selected. Pressing ENTER or
the CONTINUE (F1) function key opens the le. The user is prompted to continue before the changes are
implemented.
The Recall Conguration function does not affect probe denitions, resistor denitions, time and date, remote
interface port settings, password settings, calibration parameters, or recorded data. If an assigned probe denition no longer exists in the Probe Library when a conguration is recalled, the channel is set to UNDEFINED.
Likewise, a reference resistor input will be set to VARIABLE if the resistor ID is not found in the Resistor
Library.
53
1594A/1595A Super-Thermometer
Main Menu
5.7.7 DELETE CONFIG (F3)
MAIN MENU | SYSTEM MENU | CONFIG |
The Delete Conguration function may be used to delete a conguration le in internal memory. The screen
shows a list of conguration les found in the internal non-volatile memory. The user presses the Up/Down
arrow keys to select one of the conguration les, then CONTINUE (F1) or ENTER to delete the le. The use
must conrm the action before the conguration is deleted.
5.7.7.3.1 RESTORE DEFAULT (F4)
MAIN MENU | SYSTEM MENU | CONFIG |
The Restore Default function may be used to restore settings to factory default values. The user must press the
YES (F4) function key to run the restore function. The NO (F5) function key or EXIT key will exit the screen
without restoring default settings. The settings that are affected are listed in the Store Conguration section.
5.7.7.3.2 UPDATE FIRMWARE (F5)
MAIN MENU | SYSTEM MENU | CONFIG |
The Update Firmware function key may be used to update the internal software to a newer version when available from the manufacturer.
The Update Firmware function is always password protected. The user will be prompted to enter the correct
password to proceed.
A message appears instructing the user to plug in a USB memory device that contains the rmware update le.
A conrmation message screen appears prompting the user to press YES to proceed. While the rmware
update le is being read from the USB and loaded into the system, the power must not be switched off. If the
power is switched off during the rmware update process, the instrument may no longer operate and will need
to be returned to the factory for servicing.
Caution: Do not switch off the power while the rmware is being updated.
Once the rmware update process is completed, a message indicates that the rmware has been successfully
updated. The user must then switch the power off and then on to restart and operate with the new rmware.
5.7.7.1 PASSWORD (F4)
MAIN MENU | SYSTEM MENU |
In the Password screen the user may view and change password settings. The Password screen is always
password protected (the default is 1234). The user will be prompted to enter the correct password to access the
screen. Password protection can be enabled for probe congurations, resistor denitions, certain measure functions, and system time/date settings. See the following conguration eld descriptions for more detail.
PASSWORD - a four-digit number that must be entered by the user in order to change settings in any password protected screen. The user may change the password to any four-digit number. The default is 1234.
54
Important: The user must be sure to remember the password or record the password in a safe location.
If the password is forgotten or lost, the instrument must be returned to the factory to have the password
reset.
PROBE PROTECTION - enables or disables protection of probe denition related screens. This setting is
useful for ensuring that probe denitions in the Probe Library do not get inadvertently changed. The default is
OFF.
RESISTOR PROTECTION - enables or disables protection of resistor denition related screens. This setting
is useful for ensuring that resistor denitions in the Resistor Library do not get inadvertently changed. The
default is OFF.
MEASURE PROTECTION- enables or disables protection of measurement setting screens. This setting is
used for ensuring that timing and digital lter settings do not get inadvertently changed, possibly resulting in
noisy or less accurate measurements. The default is OFF.
TIME/DATE PROTECTION- enables or disables protection of the Time and Date setting screen. The default is OFF.
Some screens are always protected and have no associated protection setting. An example is the Calibration
Parameters screen, which always requires the correct password before any of the settings can be changed.
5.7.7.2 CALIBRATION (F5)
MAIN MENU | SYSTEM MENU |
The Calibration menu contains functions and settings for testing and maintaining proper performance of the
Super-Thermometer. Refer to Section 9, Calibration, on page 103 for test and calibration instructions.
The following are the Calibration Menu function keys.
5.7.7.2.1 SYSTEM TEST (F1)
Menus and Screens
Main Menu
MAIN MENU | SYSTEM MENU | CALIBRATION |
The System Test function key is used to perform a system self-test. This tests various components of the
Super-Thermometer and reports the results. If System Test indicates failures, contact the nearest Fluke Authorized Service Center. See Section 9.2, SYSTEM TEST (F1), on page 103 for more information.
5.7.7.2.2 CURRENT TEST (F2)
MAIN MENU | SYSTEM MENU | CALIBRATION |
The Current Test function allows the user to test the accuracy of the sensing current on the front panel input
channels.
See Section 9.3, CURRENT TEST (F2), on page 103 for more information on how to perform a current test.
5.7.7.2.3 RATIO CALIBRATION (F3)
MAIN MENU | SYSTEM MENU | CALIBRATION |
The Ratio Self-Calibration function allows the user to perform a ratio linearity check or calibration. A check
allows the user to verify ratio accuracy without making changes to ratio parameters. Calibration measures the
Super-Thermometer ratios and makes adjustments to the ratio parameters. A check should always be performed after running the ratio self-calibration function to verify that alignment was successful. See Section
9.4, RATIO CALIBRATION (F3), on page 104 for more information.
5.7.7.2.4 RESISTANCE CALIBRATION (F4)
MAIN MENU | SYSTEM MENU | CALIBRATION |
The Resistance Calibration function allows the user to test and calibrate the internal reference resistors. See
Section 9.5, RESISTANCE CALIBRATION (F4), on page 106 for more information.
5.7.7.2.5 CALIBRATION PARAMETERS (F5)
MAIN MENU | SYSTEM MENU | CALIBRATION |
Important: Calibration parameters should not be changed except as part of the Super-Thermometer
calibration procedure performed by a qualied service technician.
55
1594A/1595A Super-Thermometer
Main Menu
In the Calibration Parameters screen the user may view and change measurement calibration settings. The
calibration parameters can be viewed with no password but a password is required to make changes.
Calibration parameters include calibrated values for each of the internal resistors and the linearity coefcients
for the resistance ratio measurements. Since the accuracy of the Super-Thermometer depends on these values,
they must be accurate. Refer to Section 9.4.2, ADJUST PARAMETERS (F2), on page 106 for instructions
needed to adjust the calibration parameters.
Apart from the calibration parameters, the Calibration Parameters screen also includes the following conguration elds:
CALIBRATION DATE- used to record the date the Super-Thermometer is calibrated.
SI UNIT LOCK- enables or disables °F as an allowed temperature unit option. When this is set to ON, tem-
peratures may be displayed in units of °C and K only, and °F will not be available as an option for the Unit
setting (see Section 5.7.4.5, TEMPERATURE UNIT (F5), on page 50).
56
Getting Started
User Settings Screen
6 Getting Started
6.1 Powering on the Super-Thermometer
CAUTION: Before powering the Super-Thermometer on, ensure that the line voltage selection is set
properly. Refer to Section 3.3, Line Voltage and Fuses, on page 15 for instructions.
Power the Super-Thermometer on by setting the power switch located on the back panel to the On position.
After power is on, pressing the Power Standby switch on the front panel puts the system into hibernation, leaving key components such as the resistor oven powered on.
The rst time the unit is powered on, the User Settings screen will be displayed after startup. Later in the section it will be explained how this feature is turned off so the Measurement screen is displayed when the unit is
powered on.
6.2 User Settings Screen
The User Settings screen allows the user to congure system settings such as language, temperature measurement resolution, screen saver settings and alarms. As mentioned previously, the User Settings screen is the rst
displayed upon the rst power-up if the Start-Up Help setting is enabled. This setting can be turned off by the
user after the user settings have been congured.
The following elds are displayed in the User Settings screen:
LANGUAGE- sets the language in which the menus and screens are displayed. The options are ENGLISH,
CHINESE, JAPANESE,SPANISH, GERMAN, FRENCH, and RUSSIAN. ENGLISH is the default option.
DATE FORMAT- sets the format used to display dates on the screen. Available options are YYYY-MM-DD,
MM-DD-YYYY, and DD/MM/YYYY. The default option is YYYY-MM-DD. This setting has no effect on
communications commands and responses, recorded data, or library les.
DECIMAL FORMAT- sets the decimal character used in decimal numbers on the display. Available options
are period (.) and comma (,). The default option is (.). This setting has no effect on communications commands
and responses, recorded data, or library les.
TEMPERATURE RESOLUTION- sets the desired number of decimal places that appear in displayed temperature measurements. Available options are 0.1 through 0.000001. The default option is 0.00001. The actual
number of decimal places of displayed temperatures may be reduced for large numbers. This setting has no
effect on communications commands and responses, recorded data, or library les. The resolution of displayed
resistances and resistance ratios is xed at the maximum practical resolution.
SCREEN SAVER ENABLE- enables or disables the screen saver. If Screen Saver Enable is OFF, the display
will remain on indenitely. Enabling the screen saver saves power and extends the lifetime of the display. The
default option is OFF.
SCREEN SAVER DELAY- sets the screen saver delay time. Available options are 5 min, 10 min, 15 min, 30
min, 45 min, 1 hr, and 2 hr. The default option is 1 hr.
DISPLAY BRIGHTNESS- sets the brightness of the display backlight. Available options are 50 %, 60 %,
70 %, 80 %, 90 %, and 100 %. The default option is 100 %. Reducing the display brightness saves power and
extends the lifetime of the display.
ITS-90 SUBRANGE ALERT- enables (ON) or disables (OFF) the warning message that appears at the bottom of the Measurement Screen when a probe’s measured temperature exceeds its ITS-90 subrange by more
than 10°C. The default option is ON.
Rs DUE ALERT- enables (ON) or disables (OFF) the warning message that appears at the bottom of the Measurement screen when the due date of a resistor in the Resistor Library has expired. The default option is OFF.
ALERT BEEP- enables (ON) or disables (OFF) the audio indication that accompanies warning messages.
The default option is ON.
57
1594A/1595A Super-Thermometer
Connecting a Probe or Resistor
KEYPAD BEEP- enables (ON) or disables (OFF) the audio indication that accompanies each key-press. The
default option is ON.
START-UP HELP- determines whether the User Settings screen appears automatically after power-on. When
the settings is ON the User Settings screen will appear every time the power is switched on. If the setting is
OFF the Measurement screen will appear instead. The default option is ON.
NOTE: The following apply after power-on when Start-Up Help is on:
Pressing the NEXT (F1) function key continues to the Time and Date screen allowing the user to enter the
system Time, Date and Daylight Saving settings with the following conguration elds:
TIME- is the time of the system clock. It is always in 24-hour format.
DATE- is the date of the system clock. It appears in the format determined by the Date Format setting (see
Section 6.2, User Settings Screen, on page 57).
DAYLIGHT SAVING- determines whether the system clock is automatically adjusted at the beginning and
end of the Daylight Saving period. Options are OFF, NORTH AMERICA, and EUROPE.
The user settings sequence is completed by selecting the NEXT (F1) function key at which point the user is
prompted to allow the user settings screen to be displayed upon power-up. After making the selection, the
Channel Setup screen is shown to help the user set up a measurement.
6.3 Connecting a Probe or Resistor
CAUTION: Incorrect sensing current can damage a probe or resistor. Before connecting a device to the
Super-Thermometer ensure that the sensing current setting does not exceed the limit of the device.
Figure 16 Input Wiring
The Super-Thermometer measurement inputs are equipped with patented gold-plated DWF connectors. These
connectors are spring-loaded to provide constant contact pressure with measurement connections and they
require little maintenance.
58
The DWF connectors are designed to accept spade connectors (by pressing the connector open), bare wire
(inserted in one of the side holes while pressing the connector open), and banana jacks (inserted in the front).
For best results, always use wires and connectors that are clean and free of corrosion and oxidation.
Getting Started
Connecting a Probe or Resistor
The DWF connectors are labeled with C1, C2 (current connections) and P1, P2 (measurement potential connections). The guard connector is labeled with a “G” and is used for connecting to a probe or resistor guard or
shield. The guard connection may help reduce measurement noise.
Connect a probe or resistor, as specied by the device’s manufacturer, to any one of the four measurement
channels located on the front panel. To prevent the possibility of applying too much current, suspend measure-
ment sampling and congure the channel before making the connection.
59
Making Measurements
Measuring a Temperature Probe
7 Making Measurements
7.1 Introduction
The Super-Thermometer has been designed to allow quick and easy measurement setup while providing exible measurement options. The purpose of this section is to guide the user through the conguration of the
Super-Thermometer for typical measurements.
7.2 Measuring a Temperature Probe
The following instructions apply to the setup of both PRTs and thermistors for temperature measurement.
1. Press and hold the EXIT key to go to the Measurement screen.
2. If necessary, suspend measurement by pressing the STOP MEASUREMENT (F1) function key.
3. Using the instructions in the Getting Started section, connect a temperature probe to one of the
measurement input channels.
4. Press the SETUP key to open the Channel Setup screen. Use the Up/Down arrow keys to highlight
the channel to which the probe is connected. Scanner channels, if available, are identified with a S1
(scanner 1) or S2 (scanner 2) prefix added to the channel number.
5. Once the channel is highlighted, use the following steps to assign a probe definition to the selected
channel.
a. Select the ASSIGN PROBE (F1) function key to open the Probe Library.
b. Scroll through the list of probe denitions using the Up/Down arrow keys to locate the probe’s
denition. If the probe denition has not been previously entered, select ADD PROBE (F1)
to begin the process of creating a probe denition (see Section 5.7.2, PROBE MENU (F2), on
page 34 for more information).
c. When the probe denition is selected, press the ENTER key to assign the selected probe
denition to the channel and return to the Channel Setup menu.
6. Select the CHANNEL SETTINGS (F2) function key to configure the measurement channel using the
following steps:
a. Select the desired reference resistor (Rs) to be used for the measurement by pressing the Left/
Right arrow keys and pressing ENTER to conrm the selection. Use “Table 17 Recommended
Reference Resistors and Sensing Current” on page 62 as a guide for the selection.
b. Enter the correct sensing current using Table 17 on page 62 or the probe manufacturer’s
instructions as a guide.
c. Determine whether standby current (see Channel Setup section) is to be On or Off.
d. Select the desired measurement calculation. The options are RESISTANCE (to output the
probe’s resistance only), RATIO (to output the ratio of the probe’s resistance versus the
reference resistor), and TEMPERATURE (only if calibration coefcients were entered in the
probe denition).
e. Press the EXIT key to move back to the Channel Setup screen.
61
1594A/1595A Super-Thermometer
Scanning Multiple Temperature Probes
7. If the desired measurement channel is set to Off, use the ON/OFF (F3) function key to toggle the
channel to On. Pressing the Channel Select key located above the channel connection will also set the
channel to On.
8. Press the EXIT key twice (or press and hold the EXIT key) to go to the Measurement screen.
9. In the Measurement screen, select the START MEASURE (F1) function key to start measurement
sampling.
Table 17 Recommended Reference Resistors and Sensing Current
Probe Type Reference Resistance Sensing Current
25 W SPRT 25 W
100 W PRT or RTD 100 W
2.5 W SPRT 10 W
0.25 W SPRT 1 W
1000 W PRT or RTD 10 kW
Thermistors, 2 kW to 10 kW 10 kW
7.3 Scanning Multiple Temperature Probes
Use the following instructions to congure the Super-Thermometer for scanning multiple temperature probes.
1. Follow the steps in the previous section “Measuring a Temperature Probe” to connect and configure two
or more temperature probes.
2. Press the MENU key to open the Main Menu screen.
3. Select the MEASURE MENU (F3) function key to open the Measure menu.
4. Select the SCAN SETTINGS (F1) function key.
5. Set SCAN ENABLE to On. If needed, configure the other scan settings.
6. Press the SETUP key.
7. In the Channel Setup screen, ensure that each channel to which a probe is connected is enabled (set to
ON). Disable all other channels by setting them to Off. An alternative method is to press the channel
select key above each channel to enable or disable the channel in the scan sequence.
8. Press and hold the EXIT key to return to the Measurement screen.
9. Begin scanning by selecting the START MEASUREMENT (F1) function key.
1.0 mA
1.0 mA
5.0 mA
14.14 mA
0.05 mA
0.01 mA
62
7.4 Measuring Resistance Ratio
The ratio measurement is the fundamental measurement from which the resistance and temperature measure-
ments are derived. It is simply the ratio (Rx/Rs) between an unknown resistance (Rx) and a reference resistor
(Rs).
To congure the Super-Thermometer for ratio measurement, follow the steps listed in section 5.2 except select
RATIO in step 6.d.
7.5 Conguring an External Reference Resistor
The Super-Thermometer is equipped with a set of internal resistors. If needed, up to four external resistors can
be connected using Rs1 and Rs2 inputs on the back panel and Ch2 and Ch4 inputs on the front panel. Use the
following instructions for connecting and measuring with an external resistor:
1. Suspend measurement by going to the Measurement screen and pressing the STOP MEASUREMENT
(F1) function key.
2. Connect a reference resistor using one of the Rs inputs. Ensure the current and potential connections are
correct.
3. Go to the Add Resistor screen by using the following steps:
a. Press the SETUP key to open the Channel Setup screen.
b. Select the CHANNEL SETTINGS (F2) function key.
Making Measurements
Making A Zero-Power Measurement
c. Select the SETUP RS (F1) function key.
d. Select the DEFINE RESISTOR (F2) function key.
e. Select the ADD RESISTOR (F1) function key.
4. Enter a unique ID in the ID field. Pressing the ENTER key will open the Alpha-Numeric Interface for
text entry.
5. Enter the resistance value of the resistor in the RESISTANCE VALUE field.
Caution: The Resistance Value eld is used in measurement for the calculation of the Rx resistance.
Entering this value incorrectly will cause measurement error.
6. Set the maximum measurement current allowed for the reference resistor.
7. If necessary, enter the calibration date and due date for the external reference resistor. The SuperThermometer will use the due date to warn the user when the resistor is due for calibration.
8. Select the SAVE (F1) function key to save the definition.
9. Press the EXIT key to go up one menu to the Set Up Rs screen. Use the Up/Down arrow keys to
highlight the Rs input to which the external resistor is connected.
10. Select the ASSIGN RESISTOR (F1) function key to open a list of defined reference resistors. Use the
Up/Down arrow keys to highlight the resistor’s definition. Press the ENTER key to assign the resistor to
the selected Rs input.
11. Now, when selecting the reference resistor in Section 7.2, Measuring a Temperature Probe, on page
61, step 6.a, the newly entered external resistor will appear as an option.
7.6 Making A Zero-Power Measurement
A temperature probe self-heats when measurement current is passed through its sensing element. Typically
self-heating will cause measurement error. The Super-Thermometer Zero-Power function allows the user to
measure how much a probe self-heats. It is also able to automatically measure a probe at zero-power. Use the
following instructions for performing a zero-power measurement:
1. Press and hold the EXIT key to go to the Measurement screen.
2. If necessary, suspend measurement by pressing the STOP MEASUREMENT (F1) function key.
3. Using the instructions in the Getting Started section, connect a temperature probe to one of the
measurement input channels.
4. Configure the probe definition ensuring that the MAXIMUM CURRENT field is set to a value equal to
or greater than 1.4142 times the nominal current value.
5. Open the ZERO-POWER MEASUREMENT screen by pressing the MENU key, then the MEASURE
MENU (F3) function key, followed by the ZERO-POWER MEASUREMENT (F5) function key.
6. In the Zero-Power Measurement screen, set CHANNEL to the channel where the probe is connected.
7. Set the SETTLE TIME field to a sufficient time period to allow the probe to self-heat and stabilize after
current is applied. For most probes 1 minute is sufficient.
8. Set the MEASURE TIME field to a time span that allows a sufficient number of samples to be taken.
For example, with a 2-second sample period and 2-second Display Interval, a 1-minute Measurement
Time will yield 30 samples.
9. If necessary, use REPEAT NOMINAL to set the Super-Thermometer to repeat nominal current
measurement after the 1.4142X step is complete. The difference between the beginning and ending
nominal current values will indicate if the probe was sufficiently equilibrated during zero-power
measurement.
10. When ready, press the START (F1) function key to start the zero-power sequence of measurements.
11. When the measurements are complete, the results are displayed on the screen.
63
Remote Operation
Conguring the Network (LAN) Port
8 Remote Operation
8.1 Introduction
This section contains instructions for controlling the Super-Thermometer remotely through the available remote operation ports. See Table 18 for a list of the available remote operation ports.
The remote operation commands listed at the end of this section are applicable with all of the remote operation
ports.
Table 18 Remote Operation Ports
Connection
Description
Ethernet connector that allows connection to a
network for controlling the instrument and transmitting
measurements
USB port that allows the instrument to be controlled as a
USB peripheral from a computer
9-pin subminiature D type serial port that can be used to
control the instrument via RS-232
IEEE-488 Input/Output that is compatible with IEEE488 interface and the IEC 625 Bus for controlling the
instrument
8.2 Conguring the Network (LAN) Port
The LAN (Local Area Network) port allows the Super-Thermometer to be controlled remotely through a
traditional Ethernet IP network. With this port, the user may control the Super-Thermometer remotely using
the commands listed at the end of this section. In addition, once the port is congured properly, the SuperThermometer can be accessed with the Super-Thermometer Interface web application on a PC.
The LAN port implements a 10/100 Base T Ethernet network interface. It supports the protocols TCP/IP,
DHCP, and HTML. The port is disabled by default and must be enabled to be used. The user may select DHCP
or specify a xed network address.
The network port may be used for remote control of the Super-Thermometer by a PC and interface to network
software such as Telnet or a COM port redirector driver. In this mode, the network port accepts a raw TCP
connection on TCP port number 5025.
CAUTION: When DHCP is enabled, do not remove the Ethernet cable and turn the power off. The cable
needs to remain plugged into the unit while cycling the power.
65
1594A/1595A Super-Thermometer
Conguring the Network (LAN) Port
Conguring the LAN port is accomplished through the Remote Interface section of the System menu. The
LAN conguration parameters are HARDWARE MAC, DHCP ENABLE, IP ADDRESS, GATEWAY, SUBNET MASK, HOST NAME, and CONTROL ENABLE.
To congure the LAN port settings:
1. Press the MENU key.
2. Select the SYSTEM MENU (F5) function key
3. Select the REMOTE INTERFACE (F2) function key
4. Select the NETWORK (F3) function key
5. Use the following instructions to configure each setting.
Note: When addressing some LAN addresses, computers will often interpret 0’s in the IP address as
OCTAL values. As an example, if an IP address is entered into the Super-Thermometer as
129.196.017.023 and then an attempt to establish communication to the instrument, the IP address of
129.196.17.23 should be used. Attempting to establish a connection to 120.196.017.023 may result in a
connection request to 129.196.15.19.
Important: When changing LAN settings, leave the Super-Thermometer connected to the network and
cycle the power to activate any changes made.
8.2.1 Hardware Mac Address
HARDWARE MAC is the address of the network port. It is set at the factory and cannot be changed.
8.2.2 Selecting Dynamic Host Conguration Protocol (DHCP)
Dynamic Host Conguration Protocol (DHCP) is a client-server protocol that eliminates having to manually
set permanent/static IP addresses. The DHCP server provides conguration parameters (dynamic IP address,
subnet mask, and default gateway IP addresses) which are required for a client to participate in an IP network,
Using DHCP is the easiest way to congure the Super-Thermometer for remote operation in a network. DHCP
is enabled by default from the factory. When connected to a network, and the LAN port is enabled, the Super-
Thermometer will try and retrieve the parameters from a DHCP server that are necessary for communication.
If the parameters can’t be obtained, communication will not work.
Important: Before enabling or disabling DHCP, ensure the Super-Thermometer is connected to the
network by plugging the network cable into the LAN port on the Super-Thermometer. Always cycle the
power after making changes to DHCP.
To disable or enable DHCP, in the NETWORK screen, arrow down to DHCP ENABLE and use the Left/Right
arrow keys to select ON (enable) or OFF (disable).
8.2.3 Setting a Static Internet Protocol (IP) Address
An internet (IP) address is required for all internet and TCP/IP communications. If DHCP is enabled, the Super-Thermometer will use the dynamic address supplied by the DHCP server. However, if DHCP is disabled,
the congured static IP address will be used.
66
The Super-Thermometer comes from the factory with IP address set to 0.0.0.0.
Note: If the Super-Thermometer will be used on a corporate network and DHCP is not used, contact the
network administrator for a static IP address to be used exclusively by the Super-Thermometer. DHCP
must be disabled to use a static IP address.
To enter a static IP address, use the following steps:
1. In the NETWORK screen, use the Up/Down arrow keys to select DHCP ENABLE.
2. IF DHCP is set to ON, use the Left/Right arrow keys to select OFF. Press the ENTER key to save the
change.
3. Arrow down to IP ADDRESS and enter the desired static IP address using the front panel keys. Press
the ENTER key to save the IP address.
4. Cycle the unit’s power to allow the new address to take effect.
8.2.4 Setting the LAN Gateway Address
If communication to the Super-Thermometer passes through a router or gateway, and DHCP is disabled, the
subnet mask and gateway address on both the host computer and the Super-Thermometer must be set. Get the
correct subnet mask and gateway address from the network administrator.
The gateway address is the IP address of a gateway (router) attached to the same network as the Super-Thermometer. When the instrument detects that a host computer is not on the same network (using the network
number), the data is sent through the gateway to reach the host computer.
The gateway address is a 32-bit number. This number is represented as four, 3-digit numbers. The default
subnet mask address set from the factory is 0.0.0.0.
To change gateway address, use the following steps:
Note: Gateway address is not available if DHCP is enabled. Disable DHCP before entering the gateway
address.
Remote Operation
Conguring the Network (LAN) Port
1. In the NETWORK screen, use the Up/Down arrow keys to select GATEWAY.
2. Use the front panel numeric keys to enter the gateway address. Press the ENTER key to save the
address.
3. Cycle the unit’s power to allow the new address to take effect.
8.2.5 Setting the LAN Subnet Mask
If communication to the Super-Thermometer passes through a router or gateway, and DHCP is disabled, the
subnet mask and default gateway address on both the host computer and the Super-Thermometer must be set.
Get the correct subnet mask and gateway address from the network administrator.
The subnet mask is a 32-bit number. This number is represented as four, 3-digit numbers. The default subnet
mask address set from the factory is 255.255.255.0.
To change subnet mask address, use the following steps:
Note: Subnet mask address is not available if DHCP is enabled. Disable DHCP before entering the
subnet mask address.
1. In the NETWORK screen, use the Up/Down arrow keys to select SUBNET MASK.
2. Use the front panel numeric keys to enter the subnet mask address. Press the ENTER key to save the
address.
3. Cycle the unit’s power to allow the new address to take effect.
8.2.6 Setting the Host Name
The Host Name is the host portion of the domain name, which is translated into an IP address. The default host name is “F159X-<serial number>”, where <serial number> is the unique serial number of the
Super-Thermometer.
To change the Host Name, use the following steps:
67
1594A/1595A Super-Thermometer
Using the Web Interface
1. In the NETWORK screen, use the Up/Down arrow keys to select HOST NAME.
2. While HOST NAME is highlighted, pressing the ENTER key opens the Alpha-Numeric Interface
allowing the user to enter a host name up to 16 characters in length.
3. Select the SAVE (F3) function key to save the newly entered host name.
4. Cycle the unit’s power to allow the new host name to take effect.
8.3 Using the Web Interface
The Super-Thermometer web interface (“Figure 17 Super-Thermometer Web Interface” on page 68) allows
the user to easily communicate with the Super-Thermometer through the Ethernet connection. The web inter-
face is a page that is served by the Super-Thermometer when the LAN port is congured and connected to a
network. The user is able to access the web interface by simply entering the IP address of the Super-Thermom-
eter in an internet browser.
Important: The LAN port must be properly congured and connected to a network before the web
interface tool will operate. The computer used to view the web interface must be on the same network.
The Home screen of the web interface displays product information and the current TCP/IP settings of the
Super-Thermometer.The Measure screen of the web interface provides a remote view of the Super-Thermometer display with buttons and selection boxes that allow the user to start and stop measurement, reset statistics,
clear alert messages, enable and disable scan mode, and select measurement channels.
The Terminal screen of the web interface allows the user to enter any remote operation command in the
Command window. If a command requires a reply from the Super-Thermometer, the reply will appear in the
Response window. A password is required to use the Terminal screen. The default password is 1234. A new
password can be congured in the System Menu, Password screen.
Figure 17 Super-Thermometer Web Interface
68
8.4 Conguring the USB Port
The rear USB device port (Type B), labeled COMPUTER, allows the Super-Thermometer to be controlled by
a computer as a USB peripheral.
The USB port must be enabled before communication. Use the following steps to enable the rear USB port:
Remote Operation
Conguring the IEEE-488 Port
1. Press the MENU key.
2. Select the SYSTEM MENU (F5) function key
3. Select the REMOTE INTERFACE (F2) function key
4. Select the USB (F2) function key
5. Use the Left/Right arrow keys to change PORT ENABLE to ON (enable).
Before plugging the USB communication cable from the Super-Thermometer into a computer, make sure
the computer is connected to the internet to allow the USB driver to download and install in the computer
automatically.
If an internet connection is not available, the computer will detect the Super-Thermometer as an unknown
USB device and will prompt for a driver. Insert the DVD provided with the Super-Thermometer into the
computer and browse into the USB driver folder. When the driver is selected, the PC will automatically load it.
The user may be prompted a second time to browse to the USB driver folder and repeat the process.
When the Super-Thermometer is recognized by the computer, it is ready for communication. Search in the
computer’s operating system to nd the com port address assigned to the USB port connected to the SuperThermometer. Once the com port address is identied, remote operation commands can be sent using the com
port.
8.5 Conguring the RS-232 Serial Port
The RS-232 serial port implements the RS-232 communication standard. This port is always enabled. The RS232 parameters are 8 data bits, one stop bit, and no parity. The baud rate is user-selected. The physical port is a
9-pin D connector.
To congure the port, use the following to open the RS-232 conguration screen:
1. Press the MENU key.
2. Select the SYSTEM MENU (F5) function key
3. Select the REMOTE INTERFACE (F2) function key
4. Select the SERIAL (F1) function key
The RS-233 conguration settings are BAUD RATE and LINEFEED. Congure these settings as needed.
8.6 Conguring the IEEE-488 Port
The IEEE-488 port implements a common standard parallel instrument interface bus. The port is disabled by
default and must be enabled to be used. The user may specify the bus address. It provides the following IEEE488 dened capabilities: SH1, AH1, T6, TE0, L4, LE0, SR1, RL0, PP0, DC1, DT0, C0, E2.
The IEEE-488 conguration settings are PORT ENABLE, ADDRESS, and TERMINATION. To make
changes to these settings, use the following steps to go to the IEEE-488 conguration screen:
1. Press the MENU key.
2. Select the SYSTEM MENU (F5) function key
3. Select the REMOTE INTERFACE (F2) function key
4. Select the IEEE-488 (F4) function key
To use the port, ensure PORT ENABLE is set to ON (Enable) and set ADDRESS to an address that is not being used by another device on the IEEE-488 bus. The address may be set to a number between 1 and 30. The
default address is 22. Always press the ENTER key after changing the address.
TERMINATION determines if a carriage return character (ASCII code 13) or linefeed character (ASCII code
10) terminates a response. The default option is LINEFEED. An IEEE-488 EOI message also accompanies the
nal character of every transmission.
The IEEE-488 port accepts either or any combination of, a linefeed, carriage return, or EOI as a terminator.
The CLEAR INTERFACE (F1) function key is used to clear the input and output buffers and reset the IEEE488 interface, just as if the IFC or SDC control message was received.
69
1594A/1595A Super-Thermometer
Interface Commands
8.7 Interface Commands
An alphabetical listing of the commands implemented by the Super-Thermometer is shown in Table 19 on
page 70. These commands can be used with all of the remote operation ports. An example and description
of each command is included following the Remote Operations Command table.
8.7.1 Command Syntax
The Super-Thermometer accepts commands that set parameters, execute functions or respond with requested
data. Commands are in the form of strings of ASCII-encoded characters. Commands consist of a command
header and, if necessary, parameter data. All commands must be terminated with either a carriage return
(ASCII 0D hex or 13 decimal) or new line character (ASCII 0A hex or 10 decimal). Letter characters in commands are not case sensitive.
Command headers consist of one or more mnemonics separated by colons (:). Mnemonics use letter characters
and possibly numeric digits as well. Commands as published use abbreviated words for mnemonics. Only
the rst three or four characters of each word in a received command are recognized, and subsequent letters
are ignored. This allows a user to use the full word if desired, for instance “FETCH?” instead of “FETC?”. A
mnemonic may end with a numeric sufx that species one of a set of independent function blocks such as
input channel data paths. If a numeric sufx is omitted when a particular block must be specied, an error is
generated in the error queue (“Header sufx out of range”).
Query commands are commands that request data in response. Query commands have a question mark (?) im-
mediately following the command header. Some commands require parameter data to specify values for one or
more parameters. The command header is separated from the parameter data by a space (ASCII 20 hex or 32
decimal). Multiple parameters, when required, are separated by a comma (,).
This product does not support compound commands (multiple commands per line separated with semicolons).
All commands are sequential: the execution of each command and any associated response is completed before any subsequent command is processed.
Some commands may be password-protected, so that the associated setting cannot be changed without rst
issuing the password access enable command (SYST:PASS:CEN). Some commands may conditionally be
password-protected, depending on the associated group password protection setting. The level of password
protection is so indicated in the description for each command, unless the command is never protected. Reading a setting is always allowed.
In the commands lists and descriptions that follow, brackets [] indicate optional usage. For a <boolean>
parameter, “0” or “1” is accepted, or alternately “OFF” or “ON”; a corresponding response to a query is either
“0” or “1” only. Many parameters may be given as “DEF”, “MIN”, or “MAX” to set the setting to its default,
minimum, or maximum value respectively. A setting’s default, minimum, or maximum value may be deter-
mined using the query form of the command and adding a parameter “DEF”, “MIN”, or “MAX” respectively.
8.7.2 List of Commands
The following table lists the commands in alphabetical order.
Table 19 Report Operation Commands
Command Function
*CLS Clears all status registers and the error queue
*ESE Sets the Standard Event Status Enable Register
*ESR? Reads and clears the Standard Event Status
*IDN? Reads the product information
*RST Resets operating settings to dened values
*SRE Sets the Service Request Enable Register
*STB? Reads the Status Byte Register
Associated Setting or
Function (screen)
Register
70
Remote Operation
Interface Commands
Associated Setting or
Command Function
CAL:DATE Sets the instrument’s date of calibration Calibration Date (Calibration
CAL:PAR:LIN<n> Sets a calibration linearity correction parameter Linearity C<n> (Calibration
CAL:PAR:RES Sets the calibrated resistance of an internal
reference resistor
CAL:PAR:ZERO Sets the calibration zero correction parameter Zero Correction (Calibration
CALC<n>:AVER:ALL? Reads a channel’s statistical values (Main Screen)
CALC<n>:AVER:AVER? Reads a channel’s statistical mean Mean (Main Screen)
CALC<n>:AVER:CLEA Clears a channel’s statistics RESET STATISTICS (Main Screen)
CALC:AVER:COUN Sets the statistics Sample Count setting Sample Count (Statistics Settings)
CALC<n>:AVER:MAX? Reads a channel’s statistical maximum Maximum (Main Screen)
CALC<n>:AVER:MIN? Reads a channel’s statistical minimum Minimum (Main Screen)
CALC<n>:AVER:SDEV? Reads a channel’s statistical sample standard
deviation
CALC<n>:AVER:SEM? Reads a channel’s statistical standard error of the
mean
CALC<n>:AVER:SPR? Reads a channel’s statistical spread Spread (Main Screen)
CALC<n>:AVER:SSIZ? Reads a channel’s statistical sample size N (Main Screen)
CALC:AVER:TCON Sets the Statistics Mode setting Statistics Mode (Statistics Settings)
CALC:DELT:CHAN Sets the Delta Channel setting Delta Channel (Statistics Settings)
CALC<n>:DELT:DATA? Reads a channel’s delta result Delta (Main Screen)
CALC:DELT:MODE Sets the Delta Mode setting Delta Mode (Statistics Settings)
CALC:DELT:OFFS Sets the Delta Offset setting Delta Offset (Statistics Settings)
CALC<n>:TYPE Sets the channel’s Calculation setting Calculation (Channel Settings)
DATA:REC:ALL Sets the data recording Record Statistics setting Record Statistics (Recording
DATA:REC:FILE Sets the data recording USB File setting USB File (Recording Settings)
DATA:REC:MEM Sets the data recording Memory Device setting Memory Device (Recording Settings)
DATA:REC[:STAT] Enables data recording START/STOP RECORDING (Main
DISP:ALER:CLEA? Clears any alert message that is active CLEAR MESSAGE (Main Screen)
DISP:ALER[:READ]? Reads the display alert message (Main Screen)
DISP:DATE:FORM Sets the display Date Format setting Date Format (Display Settings)
DISP:DEC:FORM Sets the display Decimal setting Decimal (Display Settings)
DISP:FIEL:FEED<n>? Reads a statistics eld setting of the visible statistics
elds memory set
DISP:FIEL:MEM[?] <n> Reads or sets the statistics elds memory set for
display
DISP:FIEL:MEM<n>:FEED
<n>[?] <s>
DISP:LANG Sets the display Language setting Language (Display Settings)
DISP:TEMP:DIG Sets the display Temperature Resolution setting Temperature Resolution (Display
DISP:WARN:DUE Sets the display Rs Due Warning enable Rs Due Warning (Display Settings)
DISP:WARN:ITS Sets the display ITS-90 Subrange Warning enable ITS-90 Subrange Warning (Display
FETC? Reads a channel’s latest measurement
Reads or sets a statistics eld setting of a statistics
elds memory set
Function (screen)
Parameters)
Parameters)
— W Resistor (Calibration
Parameters)
Parameters)
Std Dev (Main Screen)
SE of Mean (Main Screen)
Settings)
Screen)
(Main Screen)
Recall Memory (Field Settings)
Field <n> (Field Settings)
Settings)
Settings)
71
1594A/1595A Super-Thermometer
Interface Commands
Command Function
INIT:CONT Starts or stops measurement START/STOP MEASURING (Main
INIT:STOP:BEEP Sets the stop timer’s Timer Beep setting Stop Timer Enable (Timing Settings)
INIT:STOP:DUR Sets the stop timer’s Timer Duration setting Stop Timer Duration (Timing
INIT:STOP[:STAT] Sets the Stop Timer Enable Stop Timer Enable (Timing Settings)
INIT:STOP:TIME? Reads the stop timer’s time remaining Stop Timer time remaining (Main
INP<n>:CURR Sets a channel’s Sensing Current setting Sensing Current (Channel Settings)
INP<n>:CURR:DATA? Reads a channel’s actual sensing current
INP<n>:CURR:STAN Sets a channel’s Standby Current enable Standby Current (Channel Settings)
INP:PROB:ADD Adds a new probe denition to the Probe Library ADD PROBE (Probe Menu)
INP:PROB:COUN? Reads the number of probe denitions in the Probe
INP:PROB:DEL Deletes a probe denition from the Resistor Library DELETE PROBE (Manage Probes)
INP:PROB:FIRS? Reads the ID of the rst probe in the Probe Library
INP<n>:PROB:IDEN Assigns a probe denition to the channel ASSIGN PROBE (Channel Menu)
INP:PROB:NEXT? Reads the ID of the next probe in the Probe Library
INP:PROB:PAR Sets the value of a setting in a resistor denition EDIT PROBE (Probe Menu)
INP:PROB:TEST? Reads the temperature calculated from resistance
INP:REAR<n>:RS:IDEN Sets the reference resistor assigned to a rear
INP:RS:ADD Adds a new resistor denition to the Resistor Library ADD RESISTOR (Dene Resistor)
INP:RS:COUN? Reads the number of resistor denitions in the
INP:RS:DEL Delete the resistor ID from the Resistor Library DELETE RESISTOR (Manage
INP:RS:FIRS? Reads the ID of the rst resistor in the Resistor
INP<n>:RS:IDEN Sets the reference resistor assigned to a front
INP:RS:NEXT? Reads the ID of the next resistor in the Resistor
INP:RS:OVEN:STAB Reads the oven stable condition
INP:RS:PAR Sets the value of a setting in a resistor denition EDIT RESISTOR (Dene Resistor)
INP<n>:RS:ROUT Sets a channel’s Reference Resistor (Rs) setting
ROUT:CLOS Selects one channel for measurement
ROUT:CLOS:STAT? Returns the channel number of whatever channel is
ROUT:SCAN Enables channels for scanning
ROUT:SCAN:ADD Adds channels to the scan list
ROUT:SCAN:ALT Sets the scan Alternate Reference setting Alternate Reference (Scan Settings)
ROUT:SCAN:DEL Removes channels from the scan list
ROUT:SCAN:REF Sets the scan Reference Channel setting Reference Channel (Scan Settings)
ROUT:SCAN:REP Sets the scan Repeat Count setting Repeat Count (Scan Settings)
ROUT:SCAN:STAT Sets the Scan Enable setting Scan Enable (Scan Settings)
SENS:APER Sets the measurement time and Display Interval Display Interval (Timing Settings)
Associated Setting or
Function (screen)
Screen)
Settings)
Screen)
Library
TEST CALCULATION (Edit Probe)
using the probe denition
ASSIGN RESISTOR (Set Up Rs)
reference resistor input
Resistor Library
Resistors)
Library
ASSIGN RESISTOR (Set Up Rs)
reference resistor input
Library
Active Channel (Main Screen)
actively being measured
72
Remote Operation
Interface Commands
Associated Setting or
Command Function
SENS:APER:PRES Sets the measurement timing settings to preset
values
SENS:APER:SAMP Sets the measurement Sample Period Sample Period (Timing Settings)
SENS:AVER1 Sets the Average Enable for the sample average Average Enable (Timing Settings)
SENS:AVER2 Sets the digital lter’s Filter Enable Filter Enable (Digital Filter)
SENS:AVER2:COUN Sets the digital lter’s Average Count setting Average Count (Digital Filter)
SENS:AVER2:CLEA Clears the digital lter buffer CLEAR FILTER f-key (Digital Filter)
SENS<n>:DATA? Reads a channel’s latest resistance measurement
SENS<n>:RRAT:DATA? Reads a channel’s latest resistance ratio
measurement
STAT:OPER? Reads and clears the Operation Status Event
Register
STAT:OPER:COND? Reads the Operation Status Condition Register
STAT:OPER:ENAB Sets the Operation Status Enable Register
STAT:PRES Sets the status enable registers to dened states
STAT:QUES? Reads and clears the Questionable Status Event
Register
STAT:QUES:COND? Reads the Questionable Status Condition Register
STAT:QUES:ENAB Sets the Questionable Status Enable Register
SYST:BEEP Produces an immediate beep from the speaker
SYST:BEEP:KEY Sets the Keypad Beep setting Keypad Beep (Display Settings)
SYST:BEEP:ALER Sets the Alert Beep setting Alert Beep (Display Settings)
SYST:CODE:VERS? Read the rmware code version
SYST:COMM:GPIB:ADDR Sets the IEEE-488 port’s Address setting Address (IEEE-488 Port)
SYST:COMM:GPIB[:STAT] Sets the IEEE-488 port’s Por t Enable setting Port Enable (IEEE-488 Port)
SYST:COMM:GPIB:TERM Sets the IEEE-488 port’s Termination setting Termination (IEEE-488 Port)
SYST:COMM:SER:BAUD Sets the serial port Baud Rate setting Baud Rate (Serial Port)
SYST:COMM:SER:LIN Sets the serial port Linefeed setting Linefeed (Serial Port)
SYST:COMM:SOCK:ADDR Sets the network port’s IP Address setting IP Address (Network Port)
SYST:COMM:SOCK:CONT Sets the network port’s Control Enable setting Control Enable (Network Port)
SYST:COMM:SOCK:DHCP Sets the network port’s DHCP Enable DHCP Enable (Network Port)
SYST:COMM:SOCK:GAT Sets the network port’s Gateway setting Gateway (Network Port)
SYST:COMM:SOCK:KEEP Sets the network port’s keep-alive timeout
SYST:COMM:SOCK:MAC? Reads the network port’s Hardware MAC address Hardware MAC (Network Port)
SYST:COMM:SOCK:MASK Sets the network port’s Subnet Mask setting Subnet Mask (Network Port)
SYST:COMM:SOCK:NAME Sets the network port’s Host Name Host Name (Network Port)
SYST:COMM:USB[:STAT] Sets the USB port’s Port Enable Port Enable (USB Port)
SYST:CONF:CHAN? Reads the number of available channels
SYST:CONF:SCAN? Reads the model number of an attached scanner
SYST:DATE Sets the Date of the system clock Date (Time and Date)
SYST:ERR? Reads the next error in the error queue
SYST:KLOC Sets the front-panel key lock
SYST:PASS:CDIS Disables access to password-protected settings
SYST:PASS:CEN Enables access to password-protected settings
SYST:PASS:CEN:STAT? Returns the password access state
SYST:PASS:GROU:MEAS Sets the password Measure Protection setting Measure Protection (Password)
SYST:PASS:GROU:PROB Sets the password Probe Protection setting Probe Protection (Password)
Function (screen)
PRESET PRECISION PRESET
FAST PRESET LONG (Timing
Settings)
73
1594A/1595A Super-Thermometer
Interface Commands
Command Function
SYST:PASS:GROU:RES Sets the password Resistor Protection setting Resistor Protection (Password)
SYST:PASS:GROU:TIME Sets the password Time/Date Protection setting Time/Date Protection (Password)
SYST:PASS:NEW Changes the password Password (Password)
SYST:PON:MIN? Reads the time in minutes since power-on
SYST:TIME Sets the Time of the system clock Time (Time and Date)
SYST:TIME:DAYL Sets the Daylight Saving automatic adjust setting Daylight Saving (Time and Date)
TEST:CURR:CONF Sets the conguration of the sensing current test CURRENT TEST (Calibration)
TEST:CURR[:STAT] Starts or stops the sensing current test CURRENT TEST (Calibration)
TEST:LIN:ABOR Cancels a linearity self-test LINEARITY TEST (Calibration)
TEST:LIN:INIT Starts linearity calibration LINEARITY TEST (Calibration)
TEST:LIN:PAR? Reads the suggested linearity calibration parameters LINEARITY TEST (Calibration)
TEST:LIN:REP<n>? Reads the linearity self-test report LINEARITY TEST (Calibration)
TEST:LIN:STAT? Reads the state of the linearity self-test LINEARITY TEST (Calibration)
TEST:LIN:TIME? Reads the time remaining of the linearity self-test LINEARITY TEST (Calibration)
TEST:LIN:TOL<n>? Reads a linearity calibration error tolerance LINEARITY TEST (Calibration)
TEST:SYST:ABOR Cancel a system self-test SYSTEM TEST (Calibration)
TEST:SYST:INIT Initiate a system self-test SYSTEM TEST (Calibration)
TEST:SYST:REP<n>? Reads the report from a system self-test SYSTEM TEST (Calibration)
TEST:SYST:STAT? Read the completion state of the system self-test SYSTEM TEST (Calibration)
UNIT:TEMP Set the temperature Unit Unit (Temperature Unit)
Associated Setting or
Function (screen)
8.7.3 Descriptions of Commands
The function of each command as well as an example of each is listed below.
8.7.3.1 *CLS
Clears all status registers and the error queue. Specically, this command clears the Standard Event Status
Register (see Section 8.7.3.3, *ESR?, on page 74), Operation Status Event Register (see Section 8.7.3.89,
STAT:OPER?, on page 94), Questionable Status Event Register (see Section 8.7.3.92, STAT:QUES?, on
page 94), and system error queue (see Section 8.7.3.116, SYST:ERR?, on page 98). The Status Byte Register (see Section 8.7.3.7, *STB?, on page 76) is updated to show the new state of the registers.
8.7.3.2 *ESE <value>
Example command: *ESE 16
Query form: *ESE?
Sets the Standard Event Status Enable Register. This mask register determines which corresponding bits of the
Standard Event Status Register (see Section 8.7.3.3, *ESR?, on page 74) affect the ESB summary message
(bit 5) of the Status Byte Register.
8.7.3.3 *ESR?
Example response: 160
Reads and clears the Standard Event Status Register. This indicates any of several events dened by the IEEE-
488.2 standard and which are listed in the following table. Reading the Standard Event Status Register clears
it. The register is also cleared by the *CLS command.
74
Bit Event
0 OPC, Operation Complete
1 Request control (not used)
2 Query error
3 Device dependent error
4 Execution error
5 Command error
6 User request (not used)
7 Power on
8.7.3.4 *IDN?
Example response: FLUKE,1594,A9C111,1.10/1.00
Reads the instrument information.
The response is given in the following format:
<manufacturer>,<model number>,<serial number>,<version numbers>
8.7.3.5 *RST
Sets operating settings to default states.
Remote Operation
Interface Commands
The following settings are affected:
Any self-test in progress is canceled
Measurement enable is set to OFF
Channel 2 enable is set to ON, all other channels OFF
Scan Enable is set to ON
Repeat Count is set to 1
Alternate Reference is set to OFF
Reference Channel is set to channel 2
Timing settings are preset to NORMAL presets
Stop Timer Enable is set to OFF
Timer Duration is set to 3600 s
Timer Beep is set to ON
Filter Enable is set to ON
Time Window is set to 60
Statistics Mode is set to UNLIMITED
Sample Count is set to 100
Delta Mode is set to OFFSET
Delta Offset is set to 0.
Delta Channel is set to channel 2
Unit is set to °C
The key lock setting is set to off
Statistics are reset
Not affected are channel settings other than enable, probe denitions, resistor denitions, recording settings,
display settings other than Unit, remote interface settings, time and date, password settings, and calibration
settings.
8.7.3.6 *SRE <value>
Example command: *SRE 16
75
1594A/1595A Super-Thermometer
Interface Commands
Query form: *SRE?
Sets the Service Request Enable register. This mask register determines which corresponding bits of the Status
Byte Register (see Section 8.7.3.7, *STB?, on page 76) affect the MSS master summary bit (bit 6) of the
Status Byte Register and generate a service request from the IEEE-488 port.
8.7.3.7 *STB?
Example response: 16
Reads the Status Byte Register. This indicates any of several events dened by the IEEE-488.2 and SCPI standards and which are listed in the following table. Reading the Status Byte Register does not affect it.
Bit Condition
0 (not used)
1 (not used)
2 Error
3 Questionable status
4 Message available
5 Event status
6 Master summary status
7 Operation status
8.7.3.8 CAL:DATE <year>,<month>,<day>
Example command: CAL:DATE 2009,8,21
Query form: CAL:DATE?
Password protection: unconditional
Sets the instrument’s date of calibration.
8.7.3.9 CAL:PAR:LIN<n> <value>
Query form: CAL:PAR:LIN1?
Password protection: unconditional
Sets a calibration Linearity C<n> parameter.
These settings may be used to apply a linearity correction to the measurement circuit.
IMPORTANT: Calibration parameters should not be changed except as part of the Super-Thermometer
calibration procedure performed by a qualied service technician.
8.7.3.10 CAL:PAR:RES<n> <value>
Query form: CAL:PAR:RES<n>?
Password protection: unconditional
Sets the calibrated resistance of an internal reference resistor. Sufx <n> species the resistor; 1: 1 Ω; 2: 10 Ω;
3: 25 Ω; 4: 100 Ω; 5: 10 kΩ.
IMPORTANT: Calibration parameters should not be changed except as part of the Super-Thermometer calibration procedure performed by a qualied service technician.
8.7.3.11 CAL:PAR:ZERO <value>
Query form: CAL:PAR:ZERO?
Password protection: unconditional
76
Sets the calibration Zero Correction parameter.
This setting may be used to apply a zero correction to the measurement circuit.
IMPORTANT: Calibration parameters should not be changed except as part of the Super-Thermometer
calibration procedure performed by a qualied service technician.
8.7.3.12 CALC<n>:AVER:ALL?
Example command: CALC3:AVER:ALL?
Example response: 231.928581,0.000488,0.000212,231.92862,231.928479,23
Example response: 231.928581,,,231.928581,231.928581,1
Example response: ,,,,,0
Reads a channel’s statistical mean, standard deviation, standard error of the mean, maximum, minimum, and
sample size.
Sufx <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for
channels of the rst attached scanner, and 15 through 24 for channels of the second attached scanner.
The response is given in the following format:
Remote Operation
Interface Commands
<mean>,<std. dev.>,<std. error>,<max.>,<min.>,<N>
If a value is invalid or not available, the eld is left empty in the response (the associated eld separator
comma remains).
The statistical values have the same unit as the measurement returned by the FETC? command. If the calculation is temperature, the unit of measurement is determined by the Unit setting (see Section 5.7.4.5, TEMPER-
ATURE UNIT (F5), on page 50).
8.7.3.13 CALC<n>:AVER:AVER?
Example command: CALC3:AVER:AVER?
Example response: 231.928581
Reads a channel’s statistical mean (see Section 5.7.4.2, FIELD SETTINGS (F2), on page 48).
Sufx <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for
channels of the rst attached scanner, and 15 through 24 for channels of the second attached scanner.
The returned value has the same units as the measurement returned by the FETC? command. If the calculation
is temperature, the unit of measurement is determined by the Unit setting see Section 5.7.4.5, TEMPERA-
TURE UNIT (F5), on page 50).
If no result is available, no response is returned and error -230,“Data corrupt or stale” is generated in the error
queue.
8.7.3.14 CALC[<n>]:AVER:CLEA
Example command: CALC:AVER:CLEAR
Clears a channel’s statistics.
Sufx <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for
channels of the rst attached scanner, and 15 through 24 for channels of the second attached scanner. If the
sufx number is omitted, statistics for all channels are cleared. This is equivalent to pressing the RESET STATISTICS function key in the Main Screen.
The *RST command also clears the statistics for all channels.
8.7.3.15 CALC:AVER:COUN <value>
Example command: CALC:AVER:COUNT 50
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Interface Commands
Query form: CALC:AVER:COUN?
Alternate parameter: DEF, MIN, MAX
Sets the statistics Sample Count setting.
Parameter <value> is the maximum number of samples in the moving window when the Statistics Mode set-
ting is LIMITED (see Section 8.7.3.22, CALC:AVER:TCON NORM|MOV, on page 79). The range is 1
through 100 and the default is 100.
The *RST command sets Sample Count to 100.
8.7.3.16 CALC<n>:AVER:MAX?
Example command: CALC3:AVER:MAX?
Example response: 231.928833
Reads a channel’s statistical maximum (see Section 5.7.4.2, FIELD SETTINGS (F2), on page 48).
Sufx <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for
channels of the rst attached scanner, and 15 through 24 for channels of the second attached scanner.
The returned value has the same units as the measurement returned by the FETC? command. If the calculation
is temperature, the unit of measurement is determined by the Unit setting (see Section 5.7.4.5, TEMPERA-
TURE UNIT (F5), on page 50).
If no result is available, no response is returned and error -230,“Data corrupt or stale” is generated in the error
queue.
8.7.3.17 CALC<n>:AVER:MIN?
Example command: CALC3:AVER:MIN?
Example response: 231.928207
Reads a channel’s statistical minimum (see Section 5.7.4.2, FIELD SETTINGS (F2), on page 48).
Sufx <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for
channels of the rst attached scanner, and 15 through 24 for channels of the second attached scanner.
The returned value has the same units as the measurement returned by the FETC? command. If the calculation
is temperature, the unit of measurement is determined by the Unit setting (see Section 5.7.4.5, TEMPERA-
TURE UNIT (F5), on page 50).
If no result is available, no response is returned and error -230,“Data corrupt or stale” is generated in the error
queue.
8.7.3.18 CALC<n>:AVER:SDEV?
Example command: CALC3:AVER:SDEV?
Example response: 0.000144
Reads a channel’s statistical sample standard deviation (see Section 5.7.4.2, FIELD SETTINGS (F2), on page
48).
Sufx <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for
channels of the rst attached scanner, and 15 through 24 for channels of the second attached scanner.
78
The returned value has the same units as the measurement returned by the FETC? command. If the calculation
is temperature, the unit of measurement is determined by the Unit setting (see Section 5.7.4.5, TEMPERA-
TURE UNIT (F5), on page 50).
The standard deviation is available if at least four measurements have been acquired from the channel. If
no result is available, no response is returned and error -230,“Data corrupt or stale” is generated in the error
queue.
8.7.3.19 CALC<n>:AVER:SEM?
Example command: CALC3:AVER:SEM?
Example response: 0.000039
Reads a channel’s statistical standard error of the mean (see Section 5.7.4.2, FIELD SETTINGS (F2), on page
48).
Sufx <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for
channels of the rst attached scanner, and 15 through 24 for channels of the second attached scanner.
The returned value has the same units as the measurement returned by the FETC? command. If the calculation
is temperature, the unit of measurement is determined by the Unit setting (see Section 5.7.4.5, TEMPERA-
TURE UNIT (F5), on page 50).
The standard error of the mean is available if at least four measurements have been acquired from the channel.
If no result is available, no response is returned and error -230,“Data corrupt or stale” is generated in the error
queue.
8.7.3.20 CALC<n>:AVER:SPR?
Example command: CALC3:AVER:SPREAD?
Example response: 0.000626
Reads a channel’s statistical spread (see Section 5.7.4.2, FIELD SETTINGS (F2), on page 48).
Remote Operation
Interface Commands
Sufx <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for
channels of the rst attached scanner, and 15 through 24 for channels of the second attached scanner.
The returned value has the same units as the measurement returned by the FETC? command. If the calculation
is temperature, the unit of measurement is determined by the Unit setting (see Temperature Unit (F5) in the
Display Menu).
If no result is available, no response is returned and error -230,“Data corrupt or stale” is generated in the error
queue.
8.7.3.21 CALC<n>:AVER:SSIZ?
Example command: CALC3:AVER:SSIZE?
Example response: 40
Reads a channel’s statistical sample size (see Section 5.7.4.2, FIELD SETTINGS (F2), on page 48).
Sufx <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for
channels of the rst attached scanner, and 15 through 24 for channels of the second attached scanner.
8.7.3.22 CALC:AVER:TCON NORM|MOV
Query form: CALC:AVER:TCON?
Alternate parameter: DEF
Sets the Statistics Mode setting (see Section 5.7.4.3, STATISTICS SETTINGS (F3), on page 49).
If the parameter is NORM (normal), the sample size is unlimited; the sample set accumulates until the statis-
tics are cleared. If the parameter is MOV (moving window), the sample size is limited, and once the sample
size reaches the Sample Count value, earliest samples are removed from the sample set when new samples are
added.
The *RST command sets Statistics Mode to the default setting which is NORM (UNLIMITED).
8.7.3.23 CALC:DELT:CHAN <channel>
Example command: CALC:DELT:CHAN 1
Query form: CALC:DELT:CHAN?
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Interface Commands
Sets the Delta Channel setting (see Section 5.7.4.3, STATISTICS SETTINGS (F3), on page 49).
Parameter <channel> is the channel number to use as the reference, which may be 1 through 4 for the cor-
responding front channel input, 5 through 14 for channels of the rst attached scanner, and 15 through 24 for
channels of the second attached scanner.
This setting is only meaningful when Delta Mode is set to CHANNEL.
The *RST command sets Delta Channel to 2.
8.7.3.24 CALC<n>:DELT:DATA?
Example command: CALC3:DELT:DATA?
Example response: 0.104428
Reads a channel’s delta result (see Section 5.7.4.2, FIELD SETTINGS (F2), on page 48).
Sufx <n> is the channel number: 1 through 4 for the corresponding front channel input, 5 through 14 for
channels of the rst attached scanner, and 15 through 24 for channels of the second attached scanner.
No result will be available if no measurement has been acquired on a designated Delta Channel or if the two
measurements have different units. If no result is available, no response is returned and error -230,“Data cor-
rupt or stale” is generated in the error queue.
8.7.3.25 CALC:DELT:MODE OFFS|CHAN
Query form: CALC:DELT:MODE?
Alternate parameter: DEF
Sets the Delta Mode setting (see Section 5.7.4.3, STATISTICS SETTINGS (F3), on page 49).
If the parameter is OFFS (OFFSET), the delta result is calculated by subtracting the Delta Offset setting’s
value from the channel’s measurement. If the parameter is CHAN (CHANNEL), the delta result is calculated
by subtracting the measurement from the channel determined by the Delta Channel setting from the channel’s
measurement.
The *RST command sets Delta Mode to the default setting which is OFFS.
8.7.3.26 CALC:DELT:OFFS <value>
Query form: CALC:DELT:OFFS?
Sets the Delta Offset setting (see Section 5.7.4.3, STATISTICS SETTINGS (F3), on page 49).
This setting is only meaningful when Delta Mode is set to OFFSET.
The *RST command sets Delta Offset to the default value which is 0.
8.7.3.27 CALC<n>:TYPE TEMP|RES|RAT
Query form: CALC<n>:TYPE?
Alternate parameter: DEF
Sets the channel’s Calculation setting.
Sufx <n> species the channel number: 1 through 4 for the corresponding front channel input, 5 through 14
for channels of the rst attached scanner, and 15 through 24 for channels of the second attached scanner. The
default setting may depend on the probe and reference resistor settings.
8.7.3.28 DATA:REC:ALL <boolean>
Query form: DATA:REC:ALL?
Alternate parameter: DEF
Sets the data recording Record Statistics setting (see Section 5.7.3.4.1, RECORDING SETTINGS (F1), on
page 42). The default is ON.
80
8.7.3.29 DATA:REC:FILE <name>
Query form: DATA:REC:FILE?
Sets the data recording USB File name (see Section 5.7.3.4.1, RECORDING SETTINGS (F1), on page 42).
8.7.3.30 DATA:REC:MEM INT|USB|BOTH
Query form: DATA:REC:MEM?
Sets the data recording Memory Device (see Section 5.7.3.4.1, RECORDING SETTINGS (F1), on page
42).
8.7.3.31 DATA:REC[:STAT] <boolean>
Query form: DATA:REC?
Starts or stops recording. This is equivalent to pressing the START RECORDING or STOP RECORDING
function key in the Main Screen. A <boolean> parameter value 1 enables recording; 0 disables recording.
The *RST command has no effect on this setting.
8.7.3.32 DISP:ALER:CLEA
Clears any alert message that is active.
8.7.3.33 DISP:ALER[:READ]?
Example response: 1,“Maximum temperature exceeded”
Remote Operation
Interface Commands
Reads the active alert message. The response given is the alert message number and description, comma-sepa-
rated and with the description enclosed in quotation marks. If no alert message is active, the response is 0,”No
alert”. The following table lists the possible responses:
Alert Cause
0,“No alert” No alert message is active.
1,“Maximum temperature exceeded” A measured temperature exceeds the limit dened for a probe.
2,“ITS-90 subrange exceeded” A measured temperature is outside the ITS-90 subranges dened for
3,“Resistor due for calibration” A dened resistor in the Resistor Library is past due for calibration.
The active alert message may be cleared using the DISP:ALER:CLEA command.
8.7.3.34 DISP:DATE:FORM YMD|DMY|MDY
Query form: DISP:DATE:FORM?
Alternate parameter: DEF
Sets the display Date Format setting (see Section 5.7.4.1, USER SETTINGS (F1), on page 47). The default
setting is YMD.
8.7.3.35 DISP:DEC:FORM PER|COMM
Query form: DISP:DATE:FORM?
Alternate parameter: DEF
a probe.
Sets the display Decimal setting (see Section 5.7.4.1, USER SETTINGS (F1), on page 47). The default setting is PER.
8.7.3.36 DISP:FIEL:FEED<n>?
Example command: DISP:FIEL:FEED4?
Example response: DEF
81
1594A/1595A Super-Thermometer
Interface Commands
Reads a statistics eld setting of the visible statistics elds memory set (see Section 5.7.4.2, FIELD SETTINGS (F2), on page 48).
Sufx <n> is the eld number, which may be 1 through 4. The response will be one of the following: MEAN,
SDEV, SEM, MAX, MIN, SPR, N, DELT, RES, RAT, TIME, or DATE.
8.7.3.37 DISP:FIEL:MEM <n>
Example command: DISP:FIEL:MEM 4
Query form: DISP:FIEL:MEM<n>?
Alternate parameter: MIN, MAX, DEF
Reads or sets a statistics elds memory set for display (see Section 5.7.4.2, FIELD SETTINGS (F2), on page
48).
The parameter <n> may be a number from 1 to 4.
8.7.3.38 DISP:FIEL:MEM<n1>:FEED<n2> <feed>
Example command: DISP:FIEL:MEM4:FEED4 TIME
Query form: DISP:FIEL:MEM<n1>:FEED<n2>?
Alternate parameter: DEF
Reads or sets a statistics eld setting of a statistics elds memory set (see Section 5.7.4.2, FIELD SETTINGS
(F2), on page 48).
Sufx <n1> is the memory set number, which may be 1 through 4. Sufx <n2> is the eld number, which may
be 1 through 4. The parameter <feed> may be one of the following: MEAN, SDEV, SEM, MAX, MIN, SPR,
N, DELT, RES, RAT, TIME, or DATE.
8.7.3.39 DISP:HELP <boolean>
Query form: DISP:HELP?
Sets the display Start-up Help Screen enable.
This setting determines whether the Start-up Help Screen appears at power-on. By default it is 1 and the Start-
up Help Screen appears each time the instrument is powered on. If the setting is changed to 0, the Start-up
Help Screen will no longer appear.
8.7.3.40 DISP:LANG ENGLISH|CHINESE|JAPANESE|SPANISH|GERMAN|FRENCH|RUSSIAN
Query form: DISP:LANG?
Alternate parameter: DEF
Sets the display Language setting (see Section 5.7.4.1, USER SETTINGS (F1), on page 47). The default
setting is ENGLISH.
8.7.3.41 DISP:TEMP:DIG <digits>
Query form: DISP:TEMP:DIG?
Alternate parameter: DEF, MIN, MAX
Sets the display Temperature Resolution setting (see Section 5.7.4.1, USER SETTINGS (F1), on page 47).
Parameter <digits> species the number of decimal places. The range is 1 to 6 and the default is 5.
8.7.3.42 DISP:WARN:DUE <boolean>
Query form: DISP:WARN:DUE?
Alternate parameter: DEF
82
Sets the display Rs Due Alert enable (see Section 5.7.4.1, USER SETTINGS (F1), on page 47). The default
setting is OFF.
8.7.3.43 DISP:WARN:ITS <boolean>
Query form: DISP:WARN:ITS?
Alternate parameter: DEF
Sets the display ITS-90 Subrange Alert enable (see Section 5.7.4.1, USER SETTINGS (F1), on page 47).
The default setting is ON.
8.7.3.44 FETC? <channel>
Example command: FETCH? 4
Example response: 231.92811,C,4,2009-03-23 14:33:20
Reads a channel’s latest measurement.
The <channel> parameter may be 1 through 4 for corresponding front channel inputs, 5 through 14 for chan-
nels of a rst attached scanner, or 15 through 24 for channels of a second attached scanner. If the <channel>
parameter is omitted, the latest measurement regardless of channel is returned.
If a measurement is available, the response is given in the following format:
<measurement value>,<unit>,<channel number>,<date and time>
Remote Operation
Interface Commands
<measurement value> is the value of the measurement. It may be a temperature, resistance, or resistance ratio.
The number of decimal places depends on the measured parameter. Trailing zeros are omitted.
<unit> may be “C”, “F”, or “K” for a temperature measurement; “O” for a resistance measurement, or “R” for
a resistance ratio measurement.
<channel number> is 1 through 4 for corresponding front channel inputs, 5 through 14 for channels of a rst
scanner, or 15 through 24 for channels of a second scanner.
<time and date> gives the time and date of the measurement, separated by one space. The time is in 24-hour
format. The date is in the format YYYY-MM-DD.
If no measurement is available, no response is returned and error code -230, “Data corrupt or stale,” is generated in the error queue. The command STAT:OPER? may be used rst to determine whether a new measurement has completed, and command STAT:QUES:COND? may be used to determine whether the new measure-
ment is valid before an attempt is made to read it.
8.7.3.45 INIT:CONT <boolean>
Query form: INIT:CONT?
Starts or stops measurement. This is equivalent to pressing the START MEASUREMENT or STOP MEA-
SUREMENT function key in the Measurement Screen. A <boolean> parameter value 1 enables measurement;
0 disables measurement.
The *RST command disables measurement.
8.7.3.46 INIT:STOP:BEEP <boolean>
Query form: INIT:STOP:BEEP?
Alternate parameter: DEF
Sets the stop timer’s Audio Indication setting (see Section 5.7.3.2, TIMING SETTINGS (F2), on page 39).
The *RST command sets Timer Beep to the default option which is ON.
8.7.3.47 INIT:STOP:DUR <value>
Example command: INIT:STOP:DUR 1200
Query form: INIT:STOP:DUR?
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1594A/1595A Super-Thermometer
Interface Commands
Alternate parameter: DEF, MIN, MAX
Sets the stop timer’s Timer Duration setting (see Section 5.7.3.2, TIMING SETTINGS (F2), on page 39).
The value is the number of seconds. The range is 1 to 86399 and the default is 3600 (one hour).
This setting is only meaningful when Stop Timer Enable is ON.
The *RST command sets Timer Duration to 3600.
8.7.3.48 INIT:STOP[:STAT] <boolean>
Query form: INIT:STOP?
Alternate parameter: DEF
Sets the Stop Timer Enable (see Section 5.7.3.2, TIMING SETTINGS (F2), on page 39).
The *RST command sets Stop Timer Enable to the default setting which is OFF.
8.7.3.49 INIT:STOP:TIME?
Example response: 874
Reads the stop timer’s time remaining.
The returned value is the time remaining in seconds. If the stop timer is disabled or measurement is not enabled, the returned value is 0.
8.7.3.50 INP<n>:CURR <current>
Example command: INP1:CURR 1
Query form: INP<n>:CURR?
Alternate parameter: DEF, MIN, MAX
Sets a channel’s Sensing Current setting.
Sufx <n> species the channel number: 1 through 4 for the corresponding front channel input, 5 through 14
for channels of the rst attached scanner, and 15 through 24 for channels of the second attached scanner.
The maximum and default values depend on the probe and reference resistor settings. The values may be read
using the query form with alternate parameters MAX and DEF respectively.
The actual current may be reduced if the resistance is too high. The actual current may be read using the
INP<n>:CURR:DATA? command.
8.7.3.51 INP<n>:CURR:DATA?
Reads a channel’s actual sensing current. It is the sensing current that was used when the latest measurement
of the channel was acquired.
8.7.3.52 INP<n>:CURR:STAN <boolean>
Query form: INP<n>:CURR:STAN?
Alternate parameter: DEF
Sets a channel’s Standby Current enable.
A parameter value 1 enables the standby current. When enabled, sensing current is sourced from the channel’s
terminals when measurement is enabled, even if the channel is not enabled or when another channel is being
scanned. The default setting is 0 (OFF).
8.7.3.53 INP:PROB:ADD <id>
Example command: INP:PROB:ADD “PRT_A46002”
Password protection: Probe Protection
84
Adds a new probe denition to the Probe Library. Before a probe can be assigned to a channel and temperature measured, the probe must have its denition added to the Probe Library (see Section 8.7.3.57,
INP<n>:PROB:IDEN <id>, on page 85).
Parameter <id> is the ID of the new probe denition. It can contain letters, numerals, hyphens, periods, forward slashes, and underscores. It must be between one and 24 characters in length, inclusive.
If <id> is different from all other IDs in the Probe Library and space is available in the Probe Library, a new
probe denition will be added and given the specied ID. The probe parameters will initially be set to default
values. The command INP:PROB:PAR should be used to set the parameters.
If <id> matches the ID of a probe already in the Probe Library or the Probe Library is full, no new probe denition is added, and error -224, “Illegal parameter value” will be generated in the error queue.
8.7.3.54 INP:PROB:COUN?
Alternate parameter: MAX
Reads the number of probe denitions in the Probe Library.
8.7.3.55 INP:PROB:DEL <id>
Example command: INP:PROB:DEL “PRT_A46002”
Password protection: Probe Protection
Remote Operation
Interface Commands
Deletes a probe denition from the Probe Library.
Parameter <id> is the ID of the probe denition to delete. If <id> does not match the ID of any probe in the
Probe Library, nothing is deleted, and error -224, “Illegal parameter value” is generated in the error queue.
If the deleted probe was assigned to a channel the channel’s probe setting is changed to undened (see Section
8.7.3.57, INP<n>:PROB:IDEN <id>, on page 85).
8.7.3.56 INP:PROB:FIRS?
Example response: “PRT_A46002”
Reads the ID of the rst probe in the Probe Library. It also resets the library index used by the
INP:PROB:NEXT? command.
If the Probe Library is empty the response is an empty string, “”.
8.7.3.57 INP<n>:PROB:IDEN <id>
Example command: INP1:PROB:IDEN “PRT_A46002”
Example command: INP2:PROB:IDEN NONE
Query form: INP<n>:PROB:IDEN?
Assigns a probe denition to the channel.
Sufx <n> species the channel number: 1 through 4 for the corresponding front channel input, 5 through 14
for channels of the rst attached scanner, and 15 through 24 for channels of the second attached scanner.
Parameter <id> must either be the ID of a probe denition in the Probe Library, or “NONE” (undened). Enclosing quotations marks are optional. If <id> does not match the ID of a probe denition in the Probe Library,
error -224,“Illegal parameter value” is generated in the error queue.
If a valid probe ID is assigned to the channel, the response to the query form is the ID of the probe enclosed in
quotation marks. If the assigned probe is undened, the response is “NONE” without quotation marks.
The channel’s Calculation setting will automatically be set to resistance if it was temperature when the chan-
nel’s assigned probe is set to NONE.
8.7.3.58 INP:PROB:NEXT?
Example response: “A71040”
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Interface Commands
Reads the ID of the next probe in the Probe Library. It also advances the library index used for the next response to the INP:PROB:NEXT? command.
If there are no more probes in the Probe Library, the response is an empty string, “”.
8.7.3.59 INP:PROB:PAR <id>,<name>,<value>
Example command: INP:PROB:PAR “PRT_A46002”,TYPE,PRT
Query form: INP:PROB:PAR? <id>,<name>
Example query command: INP:PROB:PAR? “PRT_A46002”,TYPE
Example query response: PRT
Password protection: Probe Protection
Sets the value of a setting in a probe denition.
Parameter <id> is the ID of a probe denition in the Probe Library. The ID should be enclosed in double
quotation marks. If <id> does not match the ID of a probe denition in the Probe Library, error -224,“Illegal
parameter value” is generated in the error queue.
Parameter <name> species the setting to set. Settings and their associated names are listed in the table below
(also see Section 5.7.2.3, EDIT PROBE (F3), on page 36).
Setting <name> <value> type or options
Type TYPE PRT|THER|RES
Calibration Date CAL_DATE string: “<yyyy>-<mm>-<dd>”
Nominal Current NOM_CURR decimal number
Maximum Current MAX_CURR decimal number
PRT type settings
Maximum Temperature MAX_TEMP decimal number, dependent on Unit setting
Conversion CONV ITS_90|PT_100|CVD_ABC|CVD_ALPH|POLY|NONE
ITS-90 conversion settings
RTPW RTPW decimal number
High Subrange HIGH_SUB NONE|5|6|7|8|9|10|11
Low Subrange LOW_SUB NONE|1|2|3|4|5
ITS-90 subrange settings
A1 – A11 A1 – A11 exponential number
B1 – B9 B1 – B9 exponential number
C1 – C5, C6, C7 C1 – C5, C6, C7 exponential number
D D exponential number
PT-100 conversion settings
R0 R0 decimal number
CVD-ABC conversion settings
R0 R0 decimal number
A A exponential number
B B exponential number
C C exponential number
CVD-ALPHA conversion settings
R0 R0 decimal number
ALPHA ALPH exponential number
DELTA DELT exponential number
BETA BETA exponential number
Polynomial conversion settings
86
C0 – C7 C0 – C7 exponential number
Thermistor type settings
Maximum Temperature MAX_TEMP decimal number, dependent on Unit setting
Conversion CONV R_POLY|T_POLY|NONE
R(T) polynomial conversion settings
B0 – B3 B0 – B3 exponential number
T(R) polynomial conversion settings
A0 – A3 A0 – A3 exponential number
The settings that are applicable to the probe denition depends on the Type setting and Conversion setting, and
may depend on other settings also, such as an ITS-90 subrange.
Any channel that has the probe assigned to it and has Calculation setting set to temperature will have Calcula-
tion (see Section 8.7.3.27, CALC<n>:TYPE TEMP|RES|RAT, on page 80) changed to resistance when the
probe’s Type setting is set to resistor or the Conversion setting is set to none.
8.7.3.60 INP:PROB:TEST? <id>,<resistance>
Example command: INP:PROB:TEST? “PRT_A46002”,65.449411
Example response: 419.527,C
Remote Operation
Interface Commands
Reads the temperature calculated from resistance using the probe denition.
Parameter <id> is the ID of a probe denition in the Probe Library. If <id> does not match the ID of a probe
denition in the Probe Library, error -224,“Illegal parameter value” is generated in the error queue.
Parameter <resistance> is the resistance from which temperature is calculated.
The normal response contains the calculated temperature and the unit, separated by a comma:
<Temperature>,<unit>
The <temperature> value is converted to units determined by the Unit setting (see Section 5.7.4.5, TEMPERA-
TURE UNIT (F5), on page 50). If the probe Type is RESISTOR or Conversion is NONE, the <resistance>
parameter value is returned instead, with <unit> “O” for ohms. If a valid response cannot be returned because
the given resistance is out of range or the probe denition is invalid, no response is given and error -230,“Data
corrupt or stale” is generated in the error queue.
8.7.3.61 INP:REAR<n>:RS:IDEN <id>|VAR|NONE
Example command: INP:REAR1:RS:IDEN “R25_01322”
Example command: INP:REAR2:RS:IDEN NONE
Query form: INP:REAR<n>:RS:IDEN?
Example query response: “R25_01322”
Example query response: VAR
Sets the resistor denition assigned to a rear reference resistor input. (Use the command INP<n>:RS:IDEN to
assign a resistor denition to a front channel input.)
Sufx <n> species the rear Rs input number and must be either 1 or 2.
Parameter <id> must be either the ID of a resistor denition in the Resistor Library, “VAR” (variable), or
“NONE”. Enclosing quotations marks are optional. If <id> does not match the ID of a resistor denition in the
Resistor Library or an allowed option, error -224,“Illegal parameter value” is generated in the error queue.
If a valid resistor ID is assigned to the input, the response to the query form is the ID of the resistor enclosed
in quotation marks. If the resistor assignment is variable or none, the response is “VAR” or “NONE” respec-
tively, without quotation marks.
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1594A/1595A Super-Thermometer
Interface Commands
A channel’s Calculation setting will be changed from temperature to resistance (see Section 8.7.3.27,
CALC<n>:TYPE TEMP|RES|RAT, on page 80) if its Reference Resistor (Rs) setting was set to the specied input and the resistor assignment for the input is set to variable. A channel’s Reference Resistor (Rs)
setting will be changed from the specied input to the internal 100 Ω resistor if the resistor assignment for the
input is being set to none.
8.7.3.62 INP:RS:ADD <id>
Example command: INP:RS:ADD “R25_01322”
Password protection: Resistor Protection
Adds a new resistor denition to the Resistor Library. Before a resistor can be assigned to an input (see commands INP:RS:FRON:IDEN and INP:RS:REAR:IDEN) and used as a reference resistor, the resistor must
have its denition added to the Resistor Library.
Parameter <id> is the ID of the new resistor denition. It can contain letters, numerals, hyphens, periods, forward slashes, and underscores. It must be between one and 22 characters in length, inclusive.
If <id> is different from all other IDs in the Resistor Library and space is available in the Resistor Library, a
new resistor denition will be added and given the specied ID. The resistor parameters will initially be set to
default values. The command INP:RS:PAR should be used to set the parameters.
If <id> matches the ID of a resistor already in the Resistor Library or the Resistor Library is full, no new resistor denition is added, and error -224, “Illegal parameter value” will be generated in the error queue.
8.7.3.63 INP:RS:COUN?
Reads the number of resistor denitions in the Resistor Library.
8.7.3.64 INP:RS:DEL <id>
Example command: CALC:PROB:DEL “R25_01322”
Password protection: Resistor Protection
Deletes a resistor denition from the Resistor Library.
Parameter <id> is the ID of the resistor denition to delete. If <id> does not match the ID of any resistor in the
Resistor Library, nothing is deleted, and error -224, “Illegal parameter value” is generated in the error queue.
If the deleted resistor was assigned to an input (see commands INP:RS:FRON:IDEN and
INP:RS:REAR:IDEN), the input’s reference resistor (Rs) setting will be changed to variable. The Calcula-
tion setting for any channel that used the input for its Reference Resistor (Rs) setting will be changed from
temperature or resistance to ratio.
8.7.3.65 INP:RS:FIRS?
Example response: “R25_01322”
Reads the ID of the rst resistor in the Resistor Library. It also resets the catalog index used by the
INP:RS:NEXT? command.
If the Probe Library is empty, no response is given and error -230,“Data corrupt or stale” is generated in the
error queue.
8.7.3.66 INP<n>:RS:IDEN <id>|VAR|NONE
Example command: INP2:RS:IDEN “R25_01322”
Example command: INP4:RS:IDEN NONE
Query form: INP<n>:RS:IDEN?
Example query response: “R25_01322”
Example query response: VAR
88
Sets the resistor denition assigned to a front reference resistor input. (Use the command
INP:REAR<n>:RS:IDEN to assign a resistor denition to a rear Rs input.)
Sufx <n> species the front input (channel) number and must be either 2 or 4.
Parameter <id> must be either the ID of a resistor denition in the Resistor Library, “VAR” (variable), or
“NONE”. Enclosing quotations marks are optional. If <id> does not match the ID of a resistor denition in the
Resistor Library or an allowed option, error -224,“Illegal parameter value” is generated in the error queue.
The response to the query form is the ID of the resistor enclosed in quotation marks if a valid resistor ID is assigned to the input. If the resistor assignment is variable or none, the response is “VAR” or “NONE” respec-
tively, without quotation marks.
A channel’s Calculation setting will be changed from temperature to resistance (see Section 8.7.3.27,
CALC<n>:TYPE TEMP|RES|RAT, on page 80) if its Reference Resistor (Rs) setting was set to the specied input and the resistor assignment for the input is set to variable. A channel’s Reference Resistor (Rs)
setting will be changed from the specied input to the internal 100 Ω resistor if the resistor assignment for the
input is being set to none.
8.7.3.67 INP:RS:NEXT?
Example response: “R100_023”
Reads the ID of the next resistor in the Resistor Library. It also advances the library index used for the next
response to the INP:RS:NEXT? command.
Remote Operation
Interface Commands
If there are no more resistors in the Resistor Library, no response is given and error -230,“Data corrupt or
stale” is generated in the error queue.
8.7.3.68 INP:RS:OVEN:STAB?
Returns the stable condition of the oven. The response is 1 if the temperature is stable and 0 if not.
8.7.3.69 INP:RS:PAR <id>,<name>,<value>
Example command: INP:RS:PAR “R25_01322”,RES,25.001098
Query form: INP:RS:PAR? <id>,<name>
Password protection: Resistor Protection
Sets the value of a setting in a resistor denition.
Parameter <id> is the ID of a resistor denition in the Resistor Library. If <id> does not match the ID of a
resistor denition in the Resistor Library, error -224,“Illegal parameter value” is generated in the error queue.
Parameter <name> species the setting to set. Settings and their associated names are listed in the table below
(also see Section 5.7.1.2.1.1.1, DEFINE RESISTOR (F2), on page 31).
Setting <name> <value> type or options
Resistance RES decimal number
Maximum Current MAX_CURR decimal number
Calibration Date CAL_DATE string: “<yyyy>-<mm>-<dd>”
Due Date DUE_DATE string: “<yyyy>-<mm>-<dd>”
8.7.3.70 INP<n>:RS:ROUT <source>
Query form: INP<n>:RS:ROUT?
Sets a channel’s Reference Resistor (Rs) setting (see Section 5.7.1.2, CHANNEL SETTINGS (F2), on page
30).
Sufx <n> species the channel number: 1 through 4 for the corresponding front channel input, 5 through 14
for channels of the rst attached scanner, and 15 through 24 for channels of the second attached scanner.
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1594A/1595A Super-Thermometer
Interface Commands
Parameter <source> may be any of the following:
<source> Function
1
10
25
100
10K
RS1 Selects the rear RS1 input as the source for the reference resistor
RS2 Selects the rear RS2 input as the source for the reference resistor
CH2 Selects the front Channel 2 input as the source for the reference resistor
CH4 Selects the front Channel 4 input as the source for the reference resistor
Selects the internal 1 W resistor for the reference resistor
Selects the internal 10 W resistor for the reference resistor
Selects the internal 25 W resistor for the reference resistor
Selects the internal 100 W resistor for the reference resistor
Selects the internal 10 kW resistor for the reference resistor
An input option is not allowed if the resistor assignment for the input is NONE (see Section 8.7.3.61,
INP:REAR<n>:RS:IDEN <id>|VAR|NONE, on page 87 and Section 8.7.3.66, INP<n>:RS:IDEN
<id>|VAR|NONE, on page 88), in which case an error -221, “Settings conict” is generated in the error
queue. Also, Channel 2 cannot be set to CH2 and Channel 4 cannot be set to CH4.
8.7.3.71 ROUT:CLOS <channel>
Query form: ROUT:CLOS?
Example command: ROUTE:CLOSE (@3)
Example response: (@3)
Selects one channel for measurement.
The lowest channel appearing in <channel list> is enabled, and all other channels are disabled. The Scan
Enable setting is set to OFF (see Section 5.7.3.1, SCAN SETTINGS (F1), on page 39). If measurement is
disabled, the channel will not actually be measured until measurement is started. If measurement of another
channel is in progress, the new channel will not be measured until the measurement completes.
A channel number in <channel list> may be 1 through 4 for the corresponding front channel input, 5 through
14 for channels of the rst attached scanner, and 15 through 24 for channels of the second attached scanner. If
a scanner is attached, channel 1 is not allowed.
The channel is specied in channel list format, preceded by an @ character, everything enclosed in
parenthesis.
If scanning is on, the query will return an empty channel list.
8.7.3.72 ROUT:CLOS:STAT?
Example response: (@2)
Returns the channel number of whatever channel is actively being measured, whether or not scanning is en-
abled. If measurement is off, an empty channel list is returned.
8.7.3.73 ROUT:SCAN <channel list>
Example command: ROUTE:SCAN (@1,2,4,6:14)
90
Query form: ROUT:SCAN?
Example query response: (@1,2,3,4)
Enables channels for scanning.
Each of the channels specied in <channel list> is enabled (this is equivalent to setting each channel ON in the
Channel Menu), and all other channels are disabled. The Scan Enable setting is set to ON (see Section 5.7.3.1,
SCAN SETTINGS (F1), on page 39). If measurement is disabled, the channels will not actually be scanned
and measured until measurement is started.
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