Fluke 1502A User Manual
Hart Scientific
1502A
Thermometer Readout
User’s Guide
Rev. 722101 ENG
Limited Warranty & Limitation of Liability
Each product from Fluke Corporation, Hart Scientific Division ("Hart") is warranted to be free from de
fects in material and workmanship under normal use and service. The warranty period is three years for
the Thermometer Readout. The warranty period begins on the date of the shipment. Parts, product re
pairs, and services are warranted for 90 days. The warranty extends only to the original buyer or end-user
customer of a Hart authorized reseller, and does not apply to fuses, disposable batteries or to any other
product which, in Hart's opinion, has been misused, altered, neglected, or damaged by accident or abnor
mal conditions of operation or handling. Hart warrants that software will operate substantially in accor
dance with its functional specifications for 90 days and that it has been properly recorded on
non-defective media. Hart does not warrant that software will be error free or operate without interrup
tion. Hart does not warrant calibrations on the Thermometer Readout.
Hart 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 Hart. Warranty support is
available if product is purchased through a Hart authorized sales outlet or Buyer has paid the applicable
international price. Hart 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.
Hart's warranty obligation is limited, at Hart's option, to refund of the purchase price, free of charge re
pair, or replacement of a defective product which is returned to a Hart authorized service center within
the warranty period.
To obtain warranty service, contact your nearest Hart authorized service center or send the product, with
a description of the difficulty, postage, and insurance prepaid (FOB Destination), to the nearest Hart authorized service center. Hart assumes no risk for damage in transit. Following warranty repair, the product will be returned to Buyer, transportation prepaid (FOB Destination). If Hart determines that the
failure was caused by misuse, alteration, accident or abnormal condition or operation or handling, Hart
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 transportation charges (FOB Shipping Point).
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Rev. 722101
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 IM
PLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
HART SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL. OR CONSE
QUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF DATA, WHETHER ARISING FROM
BREACH OF WARRANTY OR BASED ON CONTRACT, TORT, RELIANCE OR ANY OTHER
THEORY.
Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or
limitation of incidental or consequential damages, the limitations and exclusions of this warranty may not
apply to every buyer. If any provision of this Warranty is held invalid or unenforceable by a court of com
petent jurisdiction, such holding will not affect the validity or enforceability of any other provision.
Fluke Corporation, Hart Scientific Division
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
www.hartscientific.com
Subject to change without notice. • Copyright © 2005 • Printed in USA
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Table of Contents
1 Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Symbols Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2.2 Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Authorized Service Centers. . . . . . . . . . . . . . . . . . . . . . 4
2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Specifications and Environmental Conditions . . . . . . . . . . 9
3.1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Environmental Conditions . . . . . . . . . . . . . . . . . . . . . 10
4 Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3 Connecting the Probe . . . . . . . . . . . . . . . . . . . . . . . . 11
5 Parts and Controls . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1 Front Panel Buttons . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.2 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6 General Operation . . . . . . . . . . . . . . . . . . . . . . . . 15
6.1 Selecting Units . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.2 Parameter Menus . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.3 Menu Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.4 Selecting the Probe Characterization . . . . . . . . . . . . . . . . 17
6.4.1 Setting the Probe Characterization Type . . . . . . . . . . . . . . . . . . . . 17
6.4.2 Setting the Characterization Coefficients. . . . . . . . . . . . . . . . . . . . 17
6.4.3 ITS-90 PRT and Coefficients . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.4.4 Callendar-Van Dusen (RTD) Conversion . . . . . . . . . . . . . . . . . . . . 20
6.4.5 IPTS-68 Conversion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.4.5.1 Setting the Characterization Coefficients. . . . . . . . . . . . . . . . . . . . . . . . 21
6.4.5.2 Testing the Coefficients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
6.5 Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.6 Setting the Current . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.7 Power Saver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
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7 Digital Communications Interface . . . . . . . . . . . . . . . 23
7.1 Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.1.1 Setting the Baud Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.1.2 Automatic Transmission of Measurements. . . . . . . . . . . . . . . . . . . 24
7.1.3 Time Stamp and System Clock . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.1.4 Duplex Mode and Linefeed . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.2 GPIB Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.2.1 Setting the Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.2.2 Setting the Termination Character . . . . . . . . . . . . . . . . . . . . . . . 26
7.2.3 Time Stamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.3 Remote Commands . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.3.1 Measurement Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.3.1.1 Reading Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.3.1.2 Automatically Transmitting Measurements . . . . . . . . . . . . . . . . . . . . . . 29
7.3.1.3 Selecting the Unit of Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.3.1.4 Enabling the Time Stamp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.3.1.5 Setting the Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.3.2 Probe Characterization Commands . . . . . . . . . . . . . . . . . . . . . . . 29
7.3.2.1 Selecting the Characterization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.3.2.2 Testing the Characterization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.3.3 Sample Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.3.3.1 Setting the Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.3.3.2 Setting the Probe Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.3.3.3 Setting the Power Saver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.3.4 Communication Commands . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.3.4.1 Setting the Duplex Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.3.4.2 Setting the Linefeed Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.3.5 Calibration Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.3.5.1 Entering the Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.3.5.2 Setting the Menu Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.3.5.3 Setting the Calibration Coefficients . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.3.5.4 Setting the Serial Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.3.6 Other Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.3.6.1 Instrument Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.3.6.2 Reading a List of Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8 Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . 35
8.1 Accessing the Calibration Parameters. . . . . . . . . . . . . . . . 35
8.2 Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . 36
9 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
10 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . 39
10.1 CE Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
10.1.1 EMC Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
10.1.1.1 Immunity Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
10.1.1.2 Emission Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
10.1.2 Low Voltage Directive (Safety) . . . . . . . . . . . . . . . . . . . . . . . . . 41
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Figures
Figure 1 Connecting a four-wire probe . . . . . . . . . . . . . . . . . . . . . . 12
Figure 2 1502A Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 3 1502A Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 4 Parameter Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 5 Serial Cable Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
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Tables
Table1 International Electrical Symbols . . . . . . . . . . . . . . . . . . . . . 1
Table 2 Matching Certificate Values to 1502A ITS-90 Coefficients . . . . . . . 18
Table 3 Setting Coefficients Rtpw, a8, b8, a4, and b4 . . . . . . . . . . . . . . 19
Table 4 Setting Coefficients Rtpw, a5, and b5 . . . . . . . . . . . . . . . . . . 19
Table 5 Setting Coefficients R(273.16), a6, b6, c6, and d . . . . . . . . . . . . 20
Table 6 Command List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Table 6 Command List Continued . . . . . . . . . . . . . . . . . . . . . . . . 28
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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
Table 1 International Electrical Symbols
and the meaning of each symbol.
Symbol Description
AC (Alternating Current)
AC-DC
Battery
Complies with European Union Directives
1 Before You Start
Symbols Used
DC (Direct Current)
Double Insulated
Electric Shock
Fuse
PE Ground
Hot Surface (Burn Hazard)
Read the User’s Manual (Important Information)
Off
1
1502A Thermometer Readout
User’s Guide
Symbol Description
On
Canadian Standards Association
OVERVOLTAGE (Installation) CATEGORY II, Pollution Degree 2 per IEC1010-1 re
fers to the level of Impulse Withstand Voltage protection provided. Equipment of
OVERVOLTAGE CATEGORY II is energy-consuming equipment to be supplied from
the fixed installation. Examples include household, office, and laboratory appliances.
C-TIC Australian EMC mark
The European Waste Electrical and Electronic Equipment (WEEE) Directive
(2002/96/EC) mark.
1.2 Safety Information
Use this instrument only as specified in this manual. Otherwise, the protection
provided by the instrument may be impaired. Refer to the safety information in
Sections 1.2.1 and 1.2.2.
The following definitions 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 instru-
ment being used.
1.2.1 Warnings
To avoid possible electric shock or personal injury, follow these guidelines.
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DO NOT operate this unit without a properly grounded, properly polarized
power cord.
DO NOT connect this unit to a non-grounded, non-polarized outlet.
DO NOT use this unit for any application other than calibration work.
DO NOT use this unit in environments other than those listed in the user's
guide.
DO NOT use this instrument in combination with any probe 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.
If this equipment is used in a manner not specified by the manufacturer, the
protection provided by the equipment may be impaired.
2
1 Before You Start
Safety Information
Before initial use, or after transport, or after storage in humid or semi-humid
environments, or anytime the instrument has not been energized for more than
10 days, the instrument needs to be energized for a "dry-out" period of 2 hours
before it can be assumed to meet all of the safety requirements of the IEC
1010-1. If the product is wet or has been in a wet environment, take necessary
measures to remove moisture prior to applying power such as storage in a low
humidity temperature chamber operating at 50°C for 4 hours or more.
Follow all safety guidelines listed in this user's guide.
Calibration Equipment should only be used by Trained Personnel.
To avoid possible burn hazards, follow these guidelines.
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.
1.2.2
Cautions
To avoid possible damage to the instrument, follow these guidelines.
DO NOT change the values of the calibration constants from the factory set
values unless you are recalibrating the instrument. The correct setting of these
parameters is important to the safety and proper operation of the instrument.
Allow sufficient air circulation by leaving at least 3 inches of space between the
thermometer and nearby objects.
For CE compliance and for performance, use only the AC adapter shipped with
the instrument. If the AC adapter needs to be replaced, contact an Authorized
Service Center.
This instrument and thermometer probes are sensitive and can be easily dam
aged. Always handle these devices with care. DO NOT allow them to be
dropped, struck, stressed, or overheated.
Probes are fragile instruments which can be damaged by mechanical shock,
over-heating, and absorption of moisture or fluids in the wires or hub. Damage
may not be visibly apparent but nevertheless can cause drift, instability, and
loss of accuracy. Observe the following precautions:
DO NOT allow probes to be dropped, struck, bent, or stressed.
DO NOT overheat probes beyond their recommended temperature range.
DO NOT allow any part of the probe other than the sheath to be immersed in
fluid.
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DO NOT allow the probe hub or wires to be exposed to excessive
temperatures.
3
1502A Thermometer Readout
User’s Guide
Keep the probe wires clean and away from fluids.
1.3 Authorized Service Centers
Please contact one of the following authorized Service Centers to coordinate
service on your Hart product:
Fluke Corporation, Hart Scientific Division
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
4
1 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
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2 Introduction
The 1502A is a low-cost high-accuracy digital thermometer readout designed to
be used with 25Ω and 100Ω RTDs and SPRTs. Its unique combination of fea
tures makes it suitable for a wide variety of applications from laboratory mea
surement to industrial processes. Features of the 1502A include:
Measures 25Ω and 100Ω RTDs and SPRTs
•
Four-wire connection eliminates lead resistance effects
•
Accuracy: 0.006°C at 0°C
•
Resolution: 0.001°C
•
Fast one-second measurement cycle
•
Adjustable digital filter
•
Accepts ITS-90 characterization coefficients
•
Also accepts Callendar-Van Dusen and IPTS-68 coefficients
•
• Adjustable excitation current
• Displays temperature in Celsius, Fahrenheit, or Kelvin or displays resis-
tance in ohms
• Password protection of critical parameters
• Large, bright eight-digit LED display
• Serial RS-232 interface standard; IEEE-488 GPIB interface optional
• Detachable power cord
• Light weight, small and portable
•
Sturdy, reliable construction
2 Introduction
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7
3 Specifications and Environmental Conditions
3 Specifications and Environmental
Conditions
3.1 Specifications
Specifications
Resistance Range
Resistance Accuracy, one year
Resistance Accuracy, short
1, 2
term
Temperature Range
Temperature Accuracy
Temperature Coefficient of
Resistance
Resistance Resolution
Temperature Resolution
Probe
Probe Connection
Maximum acceptable lead
resistance
Probe Characterizations
Probe Excitation Current
Measurement Period
Digital Filter
Communications
Display
Clock accuracy, typical
Operating Temperature Range
AC power
Size
3
1, 3, 4
1
0
Ω
to 400Ω, auto-ranging
1
0Ωto 20Ω: 0.0005
20Ωto 400Ω: 0.0025% (25 ppm) of reading
0Ωto 30Ω: 0.0005
30Ωto 400Ω: 0.0015% (15 ppm) of reading
–200°C to 962°C (–328°F to 1764°F)
–100°C: 0.004°C
0°C: 0.006°C
100°C: 0.009°C
200°C: 0.012°C
300°C: 0.015°C
400°C: 0.018°C
500°C: 0.021°C
600°C: 0.024°C
1 ppm/°C
0
Ω
to 20Ω: 0.0001
20Ωto 400Ω: 0.001
0.001°C
Nominal R(0.01°C): 25
RTD, PRT, or SPRT
4-wire with shield, 5-pin DIN connector
100
Ω
ITS-90 sub-ranges 4, 6, 7, 8, 9, 10, and 11
IPTS-68: R
Callendar-Van Dusen: R0,
0.5 and 1 mA , user selectable, 2Hz
1 second
Exponential, 0 to 60 seconds time constant (user-selectable)
RS-232 serial standard
IEEE-488 (GPIB) optional, conforms to IEEE-488.1, capability AH1,
SH1, T6, L4, DC1
8-digit, 7-segment, yellow-green LED; 0.5 inch high characters
0.01%
Full accuracy: 16°C to 30°C
Absolute: 0°C to 55°C
115 VAC ±10%, 50/60 Hz, 10 W, nominal, 1 A maximum
230 VAC ±10%, 50/60 Hz, 10 W, 1 A, nominal (optional)
Detachable power cord
5.6 inches (14.3 cm) wide x 7.1 inches (18.1 cm) deep x 2.4 inches
(6.1 cm) high
Ω
Ω
Ω
Ω
Ω
,α,δ,a4, and c
0
to 100
4
α, δ
Ω
, and
β
9
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