Hart Scientific
9132
Portable IR Calibrator
User’s Guide
Rev. 5A2601
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
Rev. 5A2601
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 . . . . . . . . . . . . . . . . . . . . . . 9
3.3 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4 Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 Set Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.4 Setting the Temperature . . . . . . . . . . . . . . . . . . . . . . . 14
5 Parts and Controls . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1 Back Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.2 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6 General Operation . . . . . . . . . . . . . . . . . . . . . . . . 19
6.1 Changing Display Units . . . . . . . . . . . . . . . . . . . . . . . 19
6.2 Switching to 230 V Operation. . . . . . . . . . . . . . . . . . . . 19
7 Controller Operation . . . . . . . . . . . . . . . . . . . . . . . 21
7.1 Well Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.2 Temperature Set-point . . . . . . . . . . . . . . . . . . . . . . . . 21
7.2.1 Programmable Set-points . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.2.2 Set-point Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.3 Temperature Scale Units . . . . . . . . . . . . . . . . . . . . . . 23
7.4 Scan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.4.1 Scan Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
i
7.4.2 Scan Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.5 Set-point Resistance . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.6 Temperature Scale Units . . . . . . . . . . . . . . . . . . . . . . 25
7.7 Secondary Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.8 Heater Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.9 Proportional Band . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.10 Controller Configuration . . . . . . . . . . . . . . . . . . . . . . 27
7.11 Operating Parameters . . . . . . . . . . . . . . . . . . . . . . . . 27
7.12 Serial Interface Parameters . . . . . . . . . . . . . . . . . . . . . 27
7.12.1 Baud Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.12.2 Sample Period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.12.3 Duplex Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.12.4 Linefeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.13 Calibration Parameters . . . . . . . . . . . . . . . . . . . . . . . 29
7.13.1 R0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.13.2 ALPHA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.13.3 DELTA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8 Digital Communication Interface . . . . . . . . . . . . . . . . 31
8.1 Serial Communications . . . . . . . . . . . . . . . . . . . . . . . 31
8.2 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.2.1 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.2.1.1 Baud Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.2.1.2 Sample Period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.2.1.3 Duplex Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.2.1.4 Linefeed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.2.2 Serial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.3 Interface Commands . . . . . . . . . . . . . . . . . . . . . . . . 33
9 Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . 35
9.1 Calibration Points . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9.2 Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . 35
9.2.1 Compute DELTA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9.2.2 Compute R0 and ALPHA. . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.2.3 Accuracy and Repeatability. . . . . . . . . . . . . . . . . . . . . . . . . . . 37
10 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
11 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . 41
11.1 Troubleshooting Problems, Possible Causes, and Solutions . . . . 41
11.2 Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
11.2.1 EMC Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
11.2.2 Low Voltage Directive (Safety) . . . . . . . . . . . . . . . . . . . . . . . . . 42
ii
Figures
Figure 1 Temperature Gradient Between Probe and IR Target Surface . . . . . . 10
Figure 2 Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 3 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 4 Controller Operation Flowchart . . . . . . . . . . . . . . . . . . . . . 22
Figure 5 Serial Cable Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
iii
Tables
Table 1 International Electrical Symbols . . . . . . . . . . . . . . . . . . . . . 1
Table 2 Controller Communications Commands . . . . . . . . . . . . . . . . . 33
iv
1 Before You Start
1.1 Symbols Used
Table 1 lists the International Electrical Symbols. Some or all of these symbols
may be used on the instrument or in this manual.
Tabl e 1 International Electrical Symbols
Symbol Description
AC (Alternating Current)
AC-DC
Battery
CE Complies with European Union Directives
1 Before You Start
Symbols Used
DC
Double Insulated
Electric Shock
Fuse
PE Ground
Hot Surface (Burn Hazard)
Read the User’s Manual (Important Information)
Off
On
1
9132 Portable IR Calibrator
User’s Guide
Symbol Description
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.
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 personal injury, follow these guidelines.
•
BURN HAZARD – DO NOT touch the IR target surface of the unit.The
temperature of the IR target surface is the same as the actual temperature
shown on the display. If the unit is set at 500°C and the display reads
500°C, the target surface is 500°C.The top sheet metal of the instrument
may exhibit extreme temperatures for areas close to the IR target surface.
DO NOT turn off the unit at temperatures higher than 100°C. This could
create a hazardous situation. Select a set-point less than 100°C and allow
the unit to cool before turning it off.
•
DO NOT operate this unit without a properly grounded, properly polar
ized power cord.
•
DO NOT connect this unit to a non-grounded, non-polarized outlet.
•
HIGH VOLTAGE is used in the operation of this equipment. SEVERE
INJURY OR DEATH may result if personnel fail to observe safety pre
cautions. Before working inside the equipment, turn the power off and
disconnect the power cord.
•
Always replace the fuse with one of the same rating, voltage, and type.
•
This instrument is intended for indoor use only.
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2
1 Before You Start
Safety Information
Overhead clearance is required. DO NOT place this instrument under a
•
cabinet or other structure.
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 operate near flammable materials.
•
Use of this instrument at HIGH TEMPERATURES for extended periods
•
of time requires caution.
Completely unattended high temperature operation is not recommended
•
for safety reasons.
Before initial use, after transport, and anytime the dry-well has not been
•
energized for more than 10 days, the calibrator must be energized for a
dry-out period of 1 to 2 hours before it can be assumed to meet all of the
safety requirements of the IEC1010-1.
The instrument can generate extreme temperatures. Precautions must be
•
taken to prevent personal injury or damage to objects.
• Use only a grounded AC mains supply of the appropriate voltage to
power the instrument. Refer to Section 3.1, Specifications for power details.
• The instrument is equipped with operator accessible system fuses. If a
fuse blows, it may be due to a power surge or failure of a component. Replace the fuse once. If the fuse blows a second time, it is likely caused by
failure of a component part. If this occurs, contact an Authorized Hart
Scientific Service Center (see Section 1.3). Always replace the fuse with
one of the same rating, voltage, and type. Never replace the fuse with one
of a higher current rating.
•
Follow all safety guidelines listed in the user’s manual.
•
Calibration Equipment should only be used by Trained Personnel.
1.2.2
Cautions
•
DO NOT plug the unit into 230V if the heater switches and fuse holder
read 115V. This action will cause the fuses to blow and may damage the
instrument.
•
Components and heater lifetime can be shortened by continuous high
temperature operation.
•
DO NOT use fluids to clean the target surface.
•
DO NOT change the values of the calibration constants from the factory
set values. The correct setting of these parameters is important to the
safety and proper operation of the calibrator.
•
DO use a ground fault interrupt device.
3
9132 Portable IR Calibrator
User’s Guide
Operate the instrument in room temperatures between 5 and 50°C.
•
(41–122° F). Allow sufficient air circulation by leaving at least 6 inches
of space between the instrument and nearby objects.
The instrument is a precision instrument. Although is has been designed
•
for optimum durability and trouble free operation, it must be handled with
care. Always carry the unit in an upright position. The convenient fold-up
handle allows one hand carrying. The instrument should not be operated
in excessively wet, oily, dusty, or dirty environments. Do not operate near
flammable materials.
Before initial use, after transport, and anytime the dry-well has not been
•
energized for a “dry-out” period of 1-2 hours before it can be assumed to
meet all of the safety requirements of the IEC 1010-1.
If a main supply power fluctuation occurs, immediately turn off the in
•
strument. Wait until the power has stabilized before re-energizing the in
strument.
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
4
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
Fluke South East Asia Pte Ltd.
Fluke ASEAN Regional Office
Service Center
60 Alexandra Terrace #03-16
The Comtech (Lobby D)
118502
SINGAPORE
1 Before You Start
Authorized Service Centers
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
5
2 Introduction
2 Introduction
The Hart Scientific 9132 Portable IR Calibrator may be used as a portable in
strument or bench top temperature calibrator for calibrating point IR thermom
eters. The 9132 is small enough to use in the field, and accurate enough to use
in the lab. Calibrations may be done over a range of 50°C to 500°C (122°Fto
932°F). Temperature display and setability resolution of the 9132 is 0.1
degrees.
The instrument features:
Rapid heating and cooling
•
Hand strap
•
RS-232 interface capability
•
Built in programmable features include:
Temperature scan rate control
•
• Eight set-point memory
• Adjustable readout in °C or °F
The temperature is accurately controlled by Hart’s digital controller. The controller uses a precision platinum RTD as a sensor and controls the well temperature with a solid state relay (triac) driven heater.
For improved uncertainties, a 0.125" external reference thermometer may be
used in the calibration probe hole at the top of the instrument. When using an
external reference thermometer, the unit accuracy, stability, and ambient temperature effects on the surface can be minimized.
The LED front panel continuously shows the current temperature. The tempera
ture may be easily set with the control buttons to any desired temperature
within the specified range. The instrument’s multiple fault protection devices
insure user and instrument safety and protection.
The 9132 calibrator was designed for portability, low cost, and ease of opera
tion. Through proper use the instrument will provide continued accurate cali
bration of temperature sensors and devices. The user should be familiar with
the safety guidelines and operating procedures of the calibrator as described in
this user guide.
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7
3 Specifications and Environmental Conditions
3 Specifications and Environmental
Conditions
3.1 Specifications
Range 50°C to 500°C (122°F to 932°F)
Accuracy ±0.5°C at 100°C (±0.9°F at 212°F)
Stability ±0.1°C at 100°C (±0.18 at 212°F)
Target Size 2.25” (57 mm)
Resolution 0.1°C or °F
Display LED, °C or °F, switchable
Heating Times 30 minutes to max (50 0176C to 500°C)
Cooling Times 30 minutes (500°C to 100°C)
Stabilization Time 10 minutes
Target Emissivity
Aperture Diameter 2.25” (57mm)
Computer Interface RS-232 interface included with Model 9930 Interface-itcontrol software
Power 115 VAC (±10%), 3 A or 230 VAC (±10%), 1.5 A, 50/60 Hz, switchable, 340 W
Size 4” H x 6” W x 7” D (102 x 152 x 178 mm)
Weight 4 lb. (1.8 kg)
±0.65°C at 300°C (±1.2°F at 572°F)
±0.8°C at 500°C (±1.4°F at 932°F)
±0.15°C at 300°C (±0.27 at 572°F)
±0.3°C at 500°C (±0.54 at 932°F)
μ
0.95 (±0.02 from 8 to 14
M)
Specifications
Temperature differences between the IR surface and the reference probe are
calculated as shown in the graph in Figure 1 on page 10.
Note: As the temperature of the IR surface increases, the temperature dif
ference decreases.
3.2 Environmental Conditions
Although the instrument has been designed for optimum durability and trou
ble-free operation, it must be handled with care. The instrument should not be
operated in an excessively dusty or dirty environment. Maintenance and clean
ing recommendations can be found in the Maintenance section of this manual.
The instrument operates safely under the following conditions:
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9
9132 Portable IR Calibrator
User’s Guide
0
-0.1
-0.2
-0.3
delta T ⎠C
-0.4
-0.5
-0.6
50 100 150 200 250 300 350 400 450 500
Figure 1 Temperature Gradient Between Probe and IR Target Surface
temperature range: 5-35°C (41-95°F)
•
• ambient relative humidity: 15-50%
• pressure: 75kPa – 106kPa
• mains voltage within ±10% of nominal
• vibrations in the calibration environment should be minimized
• altitudes less than 2,000 meters
3.3 Warranty
Gradient between probe and IR surface
9132
Reference Probe ⎠C
10
Hart Scientific, Inc. (Hart) warrants this product to be free from defects in material and workmanship under normal use and service for a period as stated in
our current product catalog from the date of shipment. This warranty extends
only to the original purchaser and shall not apply to any product, which, in
Hart’s sole opinion, has been subject to misuse, alteration, abuse or abnormal
conditions of operation or handling.
Software is warranted to operate in accordance with its programmed instruc
-
tions on appropriate Hart products. It is not warranted to be error free.
Hart’s obligation under this warranty is limited to repair or replacement of a
product, which is returned to Hart within the warranty period and is deter
mined, upon examination by Hart, to be defective. If Hart determines that the
defect or malfunction has been caused by misuse, alteration, abuse or abnormal
conditions or operation or handling, Hart will repair the product and bill the
purchaser for the reasonable cost of repair.
To exercise this warranty, the purchaser must forward the product after calling
or writing Hart for authorization. Hart assumes NO risk for in-transit damage.
For service or assistance, please contact an Authorized Hart Scientific Service
Center (see Section 1.3).
3 Specifications and Environmental Conditions
Warranty
THE FOREGOING WARRANTY IS PURCHASER’S SOLE AND EXCLU
SIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EX
-
PRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY
IMPLIED WARRANTY OR MERCHANTABILITY, OR FITNESS FOR ANY
PARTICULAR PURPOSE OR USE. HART SHALL NOT BE LIABLE FOR
ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAM
-
AGES OR LOSS WHETHER IN CONTRACT, TORT, OR OTHERWISE.
11
4 Quick Start
4.1 Unpacking
4 Quick Start
Unpacking
Unpack the calibrator carefully and inspect it for any damage that may have oc
curred during shipment. If there is shipping damage, notify the carrier
immediately.
Verify that the following components are present:
9132 Calibrator
•
Power Cord
•
User’s Guide
•
Serial Cable
•
9930 Software
•
4.2 Set Up
Place the calibrator on a flat surface with at least 6 inches of free space around
the instrument. The prop may be swung down to raise the front of the instrument from a horizontal position. Plug the power cord into a grounded mains
outlet. Observe that the nominal voltage corresponds to that indicated on the
back of the calibrator.
Turn on the power to the calibrator by toggling the power switch on. The fan
should begin quietly blowing air through the instrument and the controller display should illuminate after 3 seconds. After a brief self-test the controller
should begin normal operation. If the unit fails to operate please check the
power connection.
The heater will start operating to bring the temperature of the calibrator to the
set-point temperature and the display will begin to show the actual target
temperature.
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4.3 Power
Plug the dry-well power cord into a mains outlet of the proper voltage, fre
quency, and current capability. Refer to Section 3.1, Specifications for power
details. Turn the dry-well on using the rear panel “POWER” switch. The
dry-well will turn on and begin to heat to the previously programmed tempera
ture set-point. The front panel LED display will indicate the actual dry-well
temperature.
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13
9132 Portable IR Calibrator
User’s Guide
4.4 Setting the Temperature
Section 8.2 explains in detail how to set the temperature set-point on the cali
-
brator using the front panel keys. The procedure is summarized here.
1. Press “SET” twice to access the set-point value.
2. Press “UP” or “DOWN” to change the set-point value.
3. Press “SET” to program in the new set-point.
4. Press “EXIT” to return to the temperature display.
When the set-point temperature is changed the controller switches the well
heater on or off to raise or lower the temperature. The displayed well tempera
ture gradually changes until it reaches the set-point temperature. The well may
require 5 to 10 minutes to reach the set-point depending on the span. Another 5
to 10 minutes is required to stabilize within ±0.1°C of the set-point. Ultimate
stability may take 15 to 20 minutes more of stabilization time.
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14
5 Parts and Controls
The user should become familiar with the calibrator and its parts.
5.1 Back Panel
The back panel (Figure 2) consists of the power cord inlet, power switch, heater
voltage switch, serial port, and fan.
115V
115 VAC 50/60 Hz 340 W
230 VAC 50/60 Hz 340 W
HEATER
VOLTAGE
SWITCH
115V
5 Parts and Controls
Back Panel
RS-232
115 V - 4 A F 250V
230 V - 2 A F 250V
Figure 2 Back Panel
Power Inlet – At the rear of the calibrator is the removable power cord inlet
that plugs into an IEC grounded socket.
Power Switch – The power switch is located on the power entry module
(PEM). The PEM also houses the fuses and the dual voltage selector. The PEM
and Heater Voltage Switch (see below) allow the unit to be field switchable for
115 VAC (±10%) or 230 VAC (±10%) operation.
Heater Voltage Switch – To be used only when changing the input voltage.
(See Section 7.2 for instructions on changing the input voltage.)
Caution: Do not plug the unit into 230V if the heater switches and fuse
holder read 115V. This action will cause the fuses to blow and may dam
-
age the instrument.
Serial Port – A DB-9 male connector is present for interfacing the calibrator to
a computer or terminal with serial RS-232 communications.
15
9132 Portable IR Calibrator
User’s Guide
Fan – The fan inside the calibrator has two speeds and runs continuously when
the unit is being operated to provide cooling for the instrument. The fan runs
slow for heating and maintaining operation and runs fast for rapid cooling.
Slots are provided for airflow. The area around the calibrator must be kept clear
to allow adequate ventilation. The airflow is directed out the front and can be
extremely hot.
5.2 Front Panel
The front panel (Figure 3) consists of the controller display, controller keypad,
and target assembly.
SETUPDOWN EXIT
9132
INFRARED
CALIBRATOR
16
Figure 3 Front Panel
Controller Display – The digital display displays set and actual temperatures
and various calibrator functions, settings, and constants. The display shows
temperatures in units according to the selected scale °Cor°F.
Controller Keypad – The four button keypad allows easy setting of the
set-point temperature. The control buttons (SET, DOWN, UP, and EXIT) are
used to set the calibrator temperature set-point, access and set other operating
parameters, and access and set calibration parameters.
Setting the control temperature is done directly in degrees of the current scale.
The control temperature can be set to one-tenth of a degree Celsius or
Fahrenheit.
The functions of the buttons are as follows:
SET – Used to display the next parameter in the menu and to store parameters
to the displayed value.
5 Parts and Controls
Front Panel
DOWN – Used to decrement the displayed value of parameters.
UP –Usedtoincrementthedisplayedvalue.
EXIT – Used to exit a function and to skip to the next function. Any changes
made to the displayed value are ignored.
Target Assembly – The target assembly is 2.25” (57mm) in diameter and has
an emisivity or 0.95.
17
6 General Operation
6.1 Changing Display Units
6 General Operation
Changing Display Units
The Model 9132 can display temperature in Celsius or Fahrenheit. The temper
ature units are shipped from the factory set to Celsius. There are two ways to
change to Fahrenheit or back to Celsius as described below.
1. Press the “SET” and “UP” simultaneously. The units are changed.
Or
1. Press the “SET” key three times from the temperature display to show
Un = C
2. Press the “UP” or “DOWN” key to change units.
6.2 Switching to 230 V Operation
The 9132 is switchable from 115 VAC to 230 VAC 50/60 Hz. Switching the
voltage can change the calibration. Therefore, we recommend that the instrument be calibrated after the voltage is switched. To change from 115 VAC to
230 VAC follow the steps below.
1. Unplug the instrument.
2. With a small straight slot screwdriver remove the fuse holder located on
the rear panel.
3. Replace the two 4 amps fuses with 2 amp 250 V fuses.
4. Replace the fuse holder with the “230V” in the display window.
5. Using the same straight slot screwdriver, move the heater switch to dis
play “230V”. See the back panel drawing in Figure 2 on page 15.
-
-
Note: If the heater switch and the fuse holder do not both read 230V when
complete, the unit will either not heat or only heat at a fraction of its capacity.
If not done properly, the unit could become damaged and void the calibration
and warranty. Use 4 amp fuses for 115V and 2 amp fuses for 230V only.
Caution: Do not plug the unit into 230V if the heater switches and fuse
holder read 115V. This action will cause the fuses to blow and may dam
age the instrument.
-
19
7 Controller Operation
7 Controller Operation
Well Temperature
This chapter discusses in detail how to operate the instrument temperature con
troller using the front control panel. Using the front panel key-switches and
LED display the user may monitor the well temperature, set the temperature
set-point in degrees C or F, monitor the heater output power, adjust the control
ler proportional band, and program the calibration parameters, operating pa
rameters, and serial interface configuration. Operation of the functions and
parameters are shown in the flowchart in Figure 4 on page 22. This chart may
be copied for reference.
In the following discussion a button with the word SET, UP, EXIT or DOWN
inside indicates the panel button while the dotted box indicates the display
reading. Explanation of the button or display reading are to the right of each
button or display value.
7.1 Well Temperature
The digital LED display on the front panel allows direct viewing of the actual
well temperature. This temperature value is what is normally shown on the display. The units, C or F, of the temperature value are displayed at the right. For
example,
100.0 C Well temperature in degrees Celsius
The temperature display function may be accessed from any other function by
pressing the “EXIT” button.
-
-
-
7.2 Temperature Set-point
The temperature set-point can be set to any value within the range and with res
olution as given in the specifications. Be careful not to exceed the safe upper
temperature limit of any device inserted into the well.
Setting the temperature involves selecting one of the eight set-points in memory
and then adjusting the set-point value.
7.2.1 Programmable Set-points
The controller stores 8 set-point temperatures in memory. The set-points can be
quickly recalled to conveniently set the calibrator to a previously programmed
temperature set-point.
To set the temperature one must first select the set-point memory. This function
is accessed from the temperature display function by pressing “SET”. The
number of the set-point memory currently being used is shown at the left on the
display followed by the current set-point value.
-
21
9132 Portable IR Calibrator
Menu Legend:
User’s Guide
Display
Temperature
SET
Select Setpoint
+
SET
DOWN
Displays Set-Point Resolution
Adjust Setpoint
Units °C/°F
Scan On/Off
Scan Rate
EXIT
Operating
Parameters
Menu
SET
HL
Adj.HL
+
SET
EXIT
Toggles °C / °F
Secondary Functions
+
SET
Display Power
Set Proportional Band
Configuration Menu
SET
EXITEXIT
UP
DOWN DOWN
Serial
Interface
Menu
BAUD
Adjust
BAUD Rate
SET
Rate
UP
EXIT
EXIT
Cal
Menu
SET
X5
DO NOT CHANGE THESE VALUES. SEE MANUAL
R0
Adj. R0
ALPHA
Adj. ALPHA
DELTA
UP
DO NOT CHANGE THESE VALUES. SEE MANUAL
Adj. DELTA
Press “SET”to step through the menu and
to store the parameter value.
Press “EXIT”briefly to skip a parameter
without storing the parameter value.
Hold “EXIT”to exit the menu and display
the temperature
Figure 4 Controller Operation Flowchart
22
Sample
Period
Adj. Sample
Period
Duplex
Mode
Adj. Duplex
Mode
Linefeed
Adjust
Linefeed
100.0 C Well temperature in degrees Celsius
7 Controller Operation
Temperature Scale Units
S
Access set-point memory
1. 100.
To change to another set-point memory press “UP” or “DOWN”.
4. 300.
Press “SET” to accept the new selection and access the set-point value.
S
Accept selected set-point memory.
7.2.2 Set-point Value
The set-point value may be adjusted after selecting the set-point memory and
pressing “SET”.
4. 200.
If the set-point value need not be changed then press “EXIT” to resume displaying the well temperature. To change the set-point value, press “SET” and
then press “UP” or “DOWN”.
220.0 New set-point value
When the desired set-point value is reached press “SET” to accept the new
value and access the temperature scale units selection. If “EXIT” is pressed in
stead then any changes made to the set-point will be ignored.
Set-point memory 1, 100 C currently used.
New set-point memory 4, 300 C
Set-point 4 value in C
-
S
Accept new set-point value
7.3 Temperature Scale Units
The temperature scale units of the controller maybe set by the user to degrees
Celsius (°C) or Fahrenheit (°F). The units are used in displaying the well tem
perature, set-point, and proportional band.
Press “SET” after adjusting the set-point value to change display units.
Un=C Scale units currently selected
Press “UP” or “DOWN” to change the units.
Un=F New units selected
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23
9132 Portable IR Calibrator
User’s Guide
7.4 Scan
The scan rate can be set and enabled so that when the set-point is changed the
dry-well heats or cools at a specified rate (degrees per minute) until it reaches
the new set-point. With the scan disabled the dry-well heats or cools at the
maximum possible rate.
7.4.1 Scan Control
The scan is controlled with the scan on/off function that appears in the main
menu after the temperature scale units.
Sc=OFF Scan function off
Press “UP” or “DOWN” to toggle the scan on or off.
Sc=On Scan function on
Press “SET” to accept the present setting and continue.
S
Accept scan setting
7.4.2 Scan Rate
The next function in the main menu is the scan rate. The scan rate can be set
from .1 to 99.9°C/min. The maximum scan rate however is actually limited by
the natural heating or cooling rate of the instrument. This is often less than
100°C/min, especially when cooling.
The scan rate function appears in the main menu after the scan control function.
The scan rate units are in degrees per minute, degrees C or F depending on the
selected units.
Sr=10.0
Press“UP”or“DOWN”tochangethescanrate.
Scan rate in C/min
Sr=2.0 New scan rate
Press “SET” to accept the new scan rate and continue.
S
Accept scan rate
7.5 Set-point Resistance
To display the Set-point Resistance, press the “SET” and “DOWN” keys simul
taneously when the temperature is displayed. When the “SET” and “DOWN”
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24
7 Controller Operation
Temperature Scale Units
keys are released the temperature is again displayed. This value is used to cali
brate the unit and is not adjustable.
7.6 Temperature Scale Units
To toggle between °C and °F, press the “SET” and “UP” keys simultaneously
when the temperature is displayed.
7.7 Secondary Menu
Functions, which are used less often, are accessed within the secondary menu.
The secondary menu is accessed by pressing “SET” and “EXIT” simulta
neously and then releasing. The first function in the secondary menu is the
heater power display.
7.8 Heater Power
The temperature controller controls the temperature of the well by pulsing the
heater on and off. The total power being applied to the heater is determined by
the duty cycle or the ratio of heater on time to the pulse cycle time. By knowing
the amount of heating the user can tell if the calibrator is heating up to the
set-point, cooling down, or controlling at a constant temperature. Monitoring
the percent heater power lets the user know how stable the well temperature is.
With good control stability the percent heating power should not fluctuate more
than ±1% within one minute.
The heater power display is accessed in the secondary menu. Press “SET” and
“EXIT” simultaneously and release. The heater power is displayed as a percentage of full power.
-
-
100.0 C Well temperature
S+E
Access heater power in secondary menu
SEC Flashes “SEC” for secondary menu and then displays the
heater power
12.0P Heater power in percent
To exit out of the secondary menu press and hold the “EXIT” button. To con
tinue on to the proportional band setting function press “SET”.
7.9 Proportional Band
In a proportional controller such as this the heater output power is proportional
to the well temperature over a limited range of temperatures around the
-
25
9132 Portable IR Calibrator
User’s Guide
set-point. This range of temperature is called the proportional band. At the bot
tom of the proportional band the heater output is 100%. At the top of the pro
portional band the heater output is 0. Thus as the temperature rises the heater
power is reduced, which consequently tends to lower the temperature back
down. In this way the temperature is maintained at a fairly constant
temperature.
The temperature stability of the well and response time depend on the width of
the proportional band. If the band is too wide the well temperature deviates ex
cessively from the set-point due to varying external conditions. This is because
the power output changes very little with temperature and the controller cannot
respond very well to changing conditions or noise in the system. If the propor
tional band is too narrow the temperature may swing back and forth because
the controller overreacts to temperature variations. For best control stability the
proportional band must be set for the optimum width.
The proportional band width is set at the factory to about 25.0°C. The user may
alter the proportional band width if he desires to optimize the control character
istics for a particular application. However, we recommend the proportional
band be changed only by knowledgeable personnel.
The proportional band width is easily adjusted from the front panel. The width
may be set to discrete values in degrees C or F depending on the selected units.
The proportional band adjustment can be accessed within the secondary menu.
Press “SET” and “EXIT” to enter the secondary menu and show the heater
power. Then press “SET” to access the proportional band.
S+E
Access heater power in secondary menu
-
-
-
-
-
26
SEC Flashes for secondary menu and then displays the
heater power
12.0P Heater power in percent
S
Access proportional band
PROP Flashes for secondary menu and then displays the
heater power
4.1 Proportional band setting
To change the proportional band press “UP” or “DOWN”.
10.0 New proportional band setting
To accept the new setting press “SET”. Press “EXIT” to continue without stor
ing the new value.
-
7 Controller Operation
Controller Configuration
S
Accept the new proportional band setting
7.10 Controller Configuration
The controller has a number of configuration and operating options and calibra
tion parameters, which are programmable via the front panel. These are ac
cessed from the secondary menu after the proportional band function by
pressing “SET”. Pressing “SET” again enters the first of three sets by configu
ration parameters – calibration parameters, operating parameters and serial in
terface parameters. The menus are selected using the “UP” and “DOWN” keys
andthenpressing“SET”.
7.11 Operating Parameters
The operating parameters menu is indicated by,
par Operating parameters menu
The operating parameters menu contains the High Limit parameter. The High
Limit parameter adjusts the upper set-point temperature. The factory default
and maximum are set to 126 °C. For safety, a user can adjust the High Limit
parameter down so the maximum temperature set-point is restricted.
Press “SET” to enable adjustment of the High Limit parameter.
HL Flashes and then displays the setting
-
-
-
-
H=126 Current HL setting
Adjust the HL parameter using “UP” or “DOWN”.
H=90 New High Limit setting
Press “SET” to accept the new High Limit parameter.
7.12 Serial Interface Parameters
The serial RS-232 interface parameters menu is indicated by,
SErIAL Serial RS-232 interface parameters menu
Press “UP” to enter the menu. The serial interface parameters menu contains
parameters, which determine the operation of the serial interface. The parame
ters in the menu are – baud rate, sample period, duplex mode, and linefeed.
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27
9132 Portable IR Calibrator
User’s Guide
7.12.1 Baud Rate
The baud rate is the first parameter in the menu. The baud rate setting deter
mines the serial communications transmission rate.
bAUd Flashes bAUd and then displays the setting
2400 b Current baud rate
The baud rate of the serial communications may be programmed to 300, 600,
1200, 2400, 4800, or 9600 baud. Use “UP” or “DOWN” to change the baud
rate value.
4800 b New baud rate
Press “SET” to set the baud rate to the new value or “EXIT” to abort the opera
tion and skip to the next parameter in the menu.
7.12.2 Sample Period
The sample period is the next parameter in the serial interface parameter menu.
The sample period is the time period in seconds between temperature measurements transmitted from the serial interface. If the sample rate is set to 5, the instrument transmits the current measurement over the serial interface
approximately every five seconds. The automatic sampling is disabled with a
sample period of 0.
SPEr Flashes SPEr and then displays the setting
-
-
28
SP= 1 Current sample period (seconds)
Adjust the value with “UP” or “DOWN” and then use “SET” to set the sample
rate to the displayed value. Press “EXIT” to continue without changes.
SP= 60 New sample period
7.12.3 Duplex Mode
The next parameter is the duplex mode. The duplex mode may be set to full du
plex or half duplex. With full duplex any commands are executed but not ech
oed. The duplex mode parameter is indicated by,
dUPL Flashes dUPL and then displays the setting
d=FULL Current duplex mode setting
-
-
Adjust the setting using “UP” or “DOWN” and pressing “SET”.
d=HALF New duplex mode setting
7.12.4 Linefeed
7 Controller Operation
Calibration Parameters
The final parameter in the serial interface menu is the linefeed mode. This pa
rameter enables (on) or disables (off) transmission of a linefeed character (LF,
ASCII 10) after transmission of any carriage-return. The linefeed parameter is
indicated by,
LF Flashes LF and then displays the setting
LF= On Current linefeed setting
Adjust the setting using “UP” or “DOWN” and pressing “SET”.
LF=OFF New linefeed setting
7.13 Calibration Parameters
The operator of the instrument controller has access to a number of the calibration constants namely R0, ALPHA, and DELTA. These values are set at the
factory and must not be altered. The correct values are important to the accuracy and proper and safe operation of the instrument. Access to these parameters is available to the user so that in the event that the controller memory fails
the user may restore these values to the factory settings. The user should have a
list of these constants and their settings with the instrument manual.
Caution: DO NOT change the values of the instrument calibration con
stants from the factory set values. The correct setting of these parameters
is important to the safety and proper operation of the instrument.
-
-
The calibration parameters menu is indicated by,
CAL Calibration parameters menu
Press “SET” five times to enter the menu. The calibration parameters menu
contains the parameters, R0, ALPHA, and DELTA, which characterize the re
sistance-temperature relationship of the platinum control sensor. These parame
ters may be adjusted to improve the accuracy of the calibrator.
The name of the parameter flashes on the display and then the value is dis
played. The value of the parameter may be changed using the “UP” and
“DOWN” buttons. After the desired value is reached press “SET” to set the pa
-
-
-
-
29
9132 Portable IR Calibrator
User’s Guide
rameter to the new value. Pressing “EXIT” causes the parameter to be skipped
ignoring any changes that may have been made.
7.13.1 R0
This probe parameter refers to the resistance of the control probe at 0°C. The
value of this parameter is set at the factory for best instrument accuracy.
7.13.2 ALPHA
This probe parameter refers to the average sensitivity of the probe between 0
and 100°C. The value of this parameter is set at the factory for best instrument
accuracy.
7.13.3 DELTA
This probe parameter characterizes the curvature of the resistance-temperature
relationship of the sensor. The value of this parameter is set at the factory for
best instrument accuracy.
30
8 Digital Communication Interface
8 Digital Communication Interface
The calibrator is capable of communicating with and being controlled by other
equipment through the digital serial interface.
With a digital interface the instrument may be connected to a computer or other
equipment. This allows the user to set the set-point temperature, monitor the
temperature, and access any of the other controller functions, all using remote
communications equipment. Communications commands are summarized in
Table 2 on page 33.
8.1 Serial Communications
Serial Communications
The calibrator is installed with an RS-232 serial interface that allows serial dig
ital communications over fairly long distances. With the serial interface the user
may access any of the functions, parameters and settings discussed in Section 8
with the exception of the baud rate setting.
8.2 Wiring
The serial communications cable attaches to the calibrator
through the D-9 connector at
the back of the instrument. Figure 5 shows the pin-out of this
connector and suggested cable
wiring. The serial cable should
be shielded. If the unit is used in
a heavy industrial setting the
shielded cable must be limited
to one meter.
8.2.1 Setup
Before operation the serial in
terface must first be set up by
programming the baud rate and
other configuration parameters.
These parameters are pro
grammed within the serial inter
face menu. The serial interface
parameters menu is outlined in
Figure 4 on page 22.
To enter the serial parameter
programming mode press
“SET” and “EXIT”
-
-
-
-
Figure 5 Serial Cable Wiring
31
9132 Portable IR Calibrator
User’s Guide
simultaneously to enter the secondary menu. Press “SET” repeatedly until the
display reads PAr. Press “UP” until the serial interface menu is indicated with
SERIAL. Finally press “SET” to enter the serial parameter menu. In the serial
interface parameters menu are the baud rate, the sample rate, the duplex mode,
and the linefeed parameter.
8.2.1.1 Baud Rate
The baud rate is the first parameter in the menu. The display prompts with the
baud rate parameter by showing “bAUd”. Press “SET” to choose to set the
baud rate. The current baud rate value is displayed. The baud rate may be pro
grammed to 300, 600, 1200, 2400, 4800, or 9600 baud. The baud rate is
pre-programmed to 1200 baud. Use “UP” or “DOWN” to change the baud rate
value. Press “SET” to set the baud rate to the new value or “EXIT” to abort the
operation and skip to the next parameter in the menu.
8.2.1.2 Sample Period
The sample period is the next parameter in the menu and prompted with SPER.
The sample period is the time period in seconds between temperature measurements transmitted from the serial interface. If the sample rate is set to 5, the instrument transmits the current measurement over the serial interface
approximately every five seconds. The automatic sampling is disabled with a
sample period of 0. Press “SET” to choose to set the sample period. Adjust the
period with “UP” or “DOWN” and then use “SET” to set the sample rate to the
displayed value.
-
32
8.2.1.3 Duplex Mode
The next parameter is the duplex mode indicated with DUPL. The duplex mode
may be set to half duplex (HALF) or full duplex (FULL). With full duplex any
commands received by the thermometer via the serial interface are immediately
echoed or transmitted back to the device of origin. With half duplex the com
mands are executed but not echoed. The default setting is full duplex. The
mode may be changed using “UP” or “DOWN” and pressing “SET”.
8.2.1.4 Linefeed
The final parameter in the serial interface menu is the linefeed mode. This pa
rameter enables (ON)ordisables(OFF) transmission of a linefeed character
(LF, ASCII10) after transmission of any carriage-return. The default setting is
with linefeed on. The mode may be changed using “UP” or “DOWN” and
pressing “SET”.
8.2.2 Serial Operation
Once the cable has been attached and the interface set up properly the control
ler immediately begins transmitting temperature readings at the programmed
rate. The serial communications uses 8 data bits, one stop bit, and no parity.
The set-point and other commands may be sent via the serial interface to set the
-
-
-
8 Digital Communication Interface
Interface Commands
temperature set-point and view or program the various parameters. The inter
face commands are discussed in Section 8.3. All commands are ASCII charac
ter strings terminated with a carriage-return character (CR, ASCII 13).
8.3 Interface Commands
The various commands for accessing the calibrator functions via the digital in
terfaces are listed in this section (see Table 2). These commands are used with
the RS-232 serial interface. The commands are terminated with a carriage-re
turn character. The interface makes no distinction between upper and lower
case letters, hence either may be used. Commands may be abbreviated to the
minimum number of letters, which determines a unique command. A command
may be used to either set a parameter or display a parameter depending on
whether or not a value is sent with the command following a “=”. For example,
“s=150.0” sets the set-point to 150.0 degrees.
In the following list of commands, characters or data within brackets, “[“ and
“]” are optional for the command. A slash, “/”, denotes alternate characters or
data. Numeric data, denoted by “n”, may be entered in decimal or exponential
notation. Characters are shown in lower case although upper case may be used.
Spaces may be added within command strings and will simply be ignored.
Backspace (BS, SCII 8) may be used to erase the previous character. A terminating CR is implied with all commands.
Tabl e 2 Controller Communications Commands
-
-
-
-
Command Description
Display Temperature
Read current set-point s[etpoint] s set: 999.9 {C or F} set: 100.00 C
Set current set-point to n s[etpoint]=n s=200.0 Instrument
Read temperature t[emperature] t t: 999.9 {C or F} t: 55.6 C
Read temperature units u[nits] u u: x u: C
Set temperature units: u[nits]=c/f
Set temperature units to Celsius u[nits]=c u=c
Set temperature units to
Fahrenheit
Read scan mode sc[an] sc scan: {ON or OFF} scan:ON
Set scan mode sc[an]=on/off sc=on ON or OFF
Read scan rate sr[ate] sr srat: 99.9 {C or F}/min srat:12.4C/min
Set scan rate sr[ate]=n sr=1.1 .1 to 99.9
Secondary Menu
Read proportional band setting pr[opband] pr pb: 999.9 pb: 15.9
Command
Format
u[nits]=f u=f
Command
Example Returned
Returned
Example
Acceptable
Values
Range
CorF
33
9132 Portable IR Calibrator
User’s Guide
Command Description
Set proportional band to
Read heater power
(duty cycle)
Configuration Menu
Operating Parameters Menu
Read high limit hl hl hl:999 hl:126
Set high limit hl=n hl=90 0–126
Serial Interface Menu
Read serial sample setting sa[mple] sa sa: 9 sa: 1
Set serial sampling setting to
seconds
Set serial duplex mode: du[plex]=f[ull]/h[alf]
Set serial duplex mode to full du[plex]=f[ull] du=f
Set serial duplex mode to half du[plex]=h[alf] du=h
Set serial linefeed mode: lf[eed]=on/of[f]
Set serial linefeed mode to on lf[eed]=on lf=on
Set serial linefeed mode to off lf[eed]=of[f] lf=of
Calibration Menu
Read R0 calibration parameter r[0] r r0: 999.999 r0: 100.578
Set R0 calibration parameter to
Read ALPHA calibration
parameter
Set ALPHA calibration parameter
to
n
Read DELTA calibration
parameter
Set DELTA calibration parameter de[lta]=n de=1.3742 0–3.0
Functions not on menu
Read firmware version number *ver[sion] *ver ver.9999,9.99 ver.9103,2.00
Read structure of all commands h[elp] h list of commands
Read all operating parameters all all list of parameters
Legend: [] Optional Command data
Note: When DUPLEX is set to FULL and a command is sent to READ, the command is returned followed by a
n
Command
Format
pr[opband]=n pr=8.83 Depends on
po[wer] po po: 999.9 po: 1.0
n
sa[mple]=n sa=0 0 to 999
n
r[0]=n r=100.324 90 to 110
al[pha] al al: 9.9999999 al: 0.0038573
al[pha]=n al=0.0038433 .002 to .005
de[lta] de de:9.99999 de: 1.507
{} Returns either information
n Numeric data supplied by user
9 Numeric data returned to user
x Character data returned to user
carriage return and linefeed. Then the value is returned as indicated in the RETURNED column.
Command
Example Returned
Returned
Example
Acceptable
Values
Configuration
FULL or HALF
ON or OFF
34
9 Calibration Procedure
9 Calibration Procedure
Calibration Points
Sometimes the user may want to calibrate the instrument to improve the tem
perature set-point accuracy. Calibration is done by adjusting the controller
probe calibration constants R0,ALPHA,andDELTAso that the temperature
of the dry-well as measured with a standard thermometer agrees more closely
with the set-point. The thermometer used must be able to measure the well tem
perature with higher accuracy than the desired accuracy of the dry-well. By us
ing a good thermometer and following this procedure the dry-well can be
calibrated to an accuracy of better than 0.8°C over its full range.
9.1 Calibration Points
In calibrating the instrument, R0,ALPHA,andDELTAare adjusted to mini
mize the set-point error at each of three different dry-well temperatures. Any
three reasonably separated temperatures may be used for the calibration. Im
proved results can be obtained for shorter ranges when using temperatures that
are just within the most useful operating range of the dry-well. The farther
apart the calibration temperatures, the larger the calibrated temperature range
is, but the calibration error is greater over the range. If, for instance, 150°Cto
350°C is chosen as the calibration range then the calibrator may achieve an accuracy of say ±0.3°C over the range 150 to 350°C. Choosing a range of 200°C
to 300°C may allow the calibrator to have a better accuracy of maybe ±0.2°C
over the range 175 to 325°C but outside that range the accuracy may be only
±0.5°C.
9.2 Calibration Procedure
1. Choose three set points to use in the calibration of the R0, ALPHA, and
DELTA parameters. These set points are generally 50.0°C, 250°C, and
500.0°C but other set points may be used if desired or necessary.
2. Set the calibrator to the low set-point. When the instrument reaches the
set-point and the display is stable, wait 15 minutes or so and then take a
reading from the thermometer. Sample the set-point resistance by hold
ing down the SET key and pressing the DOWN key. Write these values
down as T
3. Repeat step 2 for the other two set points recording them as T
and T3and R3respectively.
4. Using the recorded data, calculate new values for the R0, ALPHA, and
DELTA parameters using the following equations.
and R1respectively.
1
and R
2
-
-
-
-
-
-
2
9.2.1 Compute DELTA
ATT=−
32
35
9132 Portable IR Calibrator
User’s Guide
BTT=−
C
=
D
=
ERR=−
FRR=−
delta
T
- Measured temperature using a thermometer
1-3
– Value of the set-point resistance from the display. (Press SET and
R
1-3
DOWN at the same time.)
Where:
T
and R1are the measured temperature and resistance at 50.0°C
1
and R2are the measured temperature and resistance at 200.0°C
T
2
and R3are the measured temperature and resistance at 350.0°C
T
3
21
TTTT
⎡
⎤
⎡
⎤
⎡
⎤
3322
⎢
⎣
⎡
⎢
⎣
−
⎥
⎢
1001100 1001100
⎦
TTTT
⎤
2211
⎥
1001100 1001100
⎦
32
21
AF BE
=
DE CF
⎥
⎣
⎦
⎡
⎤
−
⎢
⎥
⎣
⎦
−
−
⎡
−
−
−
⎢
⎥
⎢
⎣
⎦
⎣
⎡
⎤
⎡
−
⎢
⎥
⎢
⎣
⎦
⎣
⎤
⎥
⎦
⎤
⎥
⎦
36
9.2.2 Compute R0 and ALPHA
TT
⎡
⎤
⎡
=+
a T delta
11
=+
a T delta
33
Ra Ra
rzero
alpha
31 13
=
=
Ra Ra
11
⎢
1001100
⎣
TT
⎡
33
⎢
1001100
⎣
−
aa
−
13
RR
−
13
−
31 13
⎥
⎦
⎤
⎥
⎦
Where:
delta is the new value of DELTA computed above
Program the new values for DELTA (delta), R0 (rzero) & ALPHA (alpha) into
the instrument using the following steps.
1. Press the SET and EXIT keys at the same time and then press SET until
R0 is displayed.
⎤
−
⎢
⎥
⎣
⎦
⎡
⎤
−
⎢
⎥
⎣
⎦
2. Press SET then use the UP or DOWN keys until the correct numerical
setting is displayed. Press SET to accept the new value.
3. Repeat step 2 for ALPHA and DELTA.
9.2.3 Accuracy and Repeatability
Check the accuracy of the instrument at various points over the calibration
range. If instrument does not pass specification at all set-points, repeat the Cali
bration Procedure.
9 Calibration Procedure
Calibration Procedure
-
37
10 Maintenance
The calibration instrument has been designed with the utmost care. Ease
•
of operation and simplicity of maintenance have been a central theme in
the product development. Therefore, with proper care the instrument
should require very little maintenance. Avoid operating the instrument in
dirty or dusty environments.
If the outside of the instrument becomes soiled, it may be wiped clean
•
with a damp cloth and mild detergent. Do not use harsh chemicals on the
surface, which may damage the paint.
The calibrator should be handled with care. Avoid knocking or dropping
•
the calibrator.
If the mains supply cord becomes damaged, replace it with a cord with
•
the appropriate gauge wire for the current of the instrument. If there are
any questions, call an Authorized Hart Scientific Service Center (see Sec
tion 1.3) for more information.
• Before using any cleaning or decontamination method except those rec-
ommended by Hart, users should check with an Authorized Hart Scientific Service Center (see Section 1.3) to be sure that the proposed method
will not damage the equipment.
• If the instrument is used in a manner not in accordance with the equip-
ment design, the operation of the instrument may be impaired or safety
hazards may arise.
10 Maintenance
-
39
11 Troubleshooting
11 Troubleshooting
This section contains information on troubleshooting, CE Comments, and a
wiring diagram.
11.1 Troubleshooting Problems, Possible Causes,
and Solutions
In the event that the instrument appears to function abnormally, this section
may help to find and solve the problem. Several possible problem conditions
are described along with likely causes and solutions. If a problem arises, please
read this section carefully and attempt to understand and solve the problem. If
the problem cannot otherwise be solved, contact an Authorized Service Center
(see Section 1.3). Be sure to have the model number, serial number, and voltage
of your instrument available.
Problem Possible Causes and Solutions
Incorrect temperature
reading
Incorrect R0, ALPHA, and DELTA parameters. Find the values for R0, ALPHA, and DELTA on the Report of Calibration that was shipped with the instrument (or from subsequent calibrations of the instrument). Reprogram the
parameters into the Model 9132 memory (see Section 7.13, Calibration Parameters). Allow the instrument to stabilize and verify the accuracy of the temperature reading.
Blank display after
mains power applied
The Instrument heats or
cools too quickly or too
slowly
Controller locked up. The controller may have locked up due to a power
surge or other aberration. Initialize the system by performing the Factory Reset
Sequence.
Factory Reset Sequence. Hold the SET and EXIT buttons down at the same
time while powering up the instrument. After the instrument displays
release the buttons. The display shows
displays the firmware version. After performing the master reset sequence, all
of the configuration parameters are reset to their default values. Reprogram the
R0, ALPHA, and DELTA parameters into the Model 9132 memory (see Section
7.13, Calibration Parameters) and any other applicable configuration parame
ters. Allow the instrument to stabilize and verify the accuracy of the tempera
ture reading.
Blown fuse. A fuse may have blown due to a power surge or failure of a com
ponent. Replace the fuse once. If the fuse blows a second time, it is likely
caused by the failure of a component. Always replace the fuse with one of the
same rating, voltage, and type. Never replace the fuse with one of a higher cur
rent rating.
Incorrect scan and scan rate settings. The scan and scan rate settings may
be set to unwanted values. Check the Scan and Scan Rate settings. The scan
may be off (if the unit seems to be responding too quickly). The scan may be
on with the Scan Rate set low (if unit seems to be responding too slowly).
-init-
, then displays
9132
-init-
,
, and then
-
-
-
41
-
9132 Portable IR Calibrator
User’s Guide
Problem Possible Causes and Solutions
The display shows any
of the following:
err 2,err 3,err
4
,
Err 5,Err 6
Err 7
Temperature cannot be
set above a certain point
11.2 Comments
11.2.1 EMC Directive
Hart Scientifics’ equipment has been tested to meet the European Electromagnetic Compatibility Directive (EMC Directive, 89/336/EEC). The Declaration
of Conformity for your instrument lists the specific standards to which the unit
was tested.
err 1
,or
Controller problem. The error messages signify the following problems with
,
the controller.
Err 1
- a RAM error
Err 2
- a NVRAM error
Err 3
- a Structure error
Err 4
- an ADC setup error
Err 5
- an ADC ready error
Err 6
– a defective control sensor
Err 7
– a heater error
Initialize the system by performing the Factory Reset Sequence describe
above.
Incorrect High Limit parameter. The High Limit parameter may be set below
500°C. Check this value as described in Section 8.10, Operating Parameters.
42
11.2.2 Low Voltage Directive (Safety)
In order to comply with the European Low Voltage Directive (73/23/EEC),
Hart Scientific equipment has been designed to meet the IEC 1010-1 (EN
61010-1) and the IEC 1010-2-010 (EN 61010-2-010) standards.
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