9141
Hart Scientific
9141
Dry-Well Calibrator
User’s Guide
Rev. 5B0702
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. 5B0702
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 Authorized Service Centers. . . . . . . . . . . . . . . . . . . . . . 6
2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Specifications and Environmental Conditions . . . . . . . . . 11
3.1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Environmental Conditions. . . . . . . . . . . . . . . . . . . . . . 11
3.3 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4 Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 Set-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.4 Setting the Temperature . . . . . . . . . . . . . . . . . . . . . . . 14
5 Parts and Controls . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1 Bottom Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.2 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.3 Constant Temperature Block Assembly . . . . . . . . . . . . . . . 17
5.3.1 Constant Temperature Block . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.3.2 Probe Sleeves and Tongs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6 General Operation . . . . . . . . . . . . . . . . . . . . . . . . 19
6.1 Changing Display Units . . . . . . . . . . . . . . . . . . . . . . . 19
6.2 Switching to 230V 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
7.2.3 Temperature Scale Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
i
7.3 Scan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.3.1 Scan Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.3.2 Scan Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.4 Temperature Display Hold . . . . . . . . . . . . . . . . . . . . . 25
7.4.1 Hold Temperature Display . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.4.2 Mode Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.4.3 Switch Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.4.4 Switch Test Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.5 Secondary Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.6 Heater Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.7 Proportional Band . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.8 Controller Configuration . . . . . . . . . . . . . . . . . . . . . . 28
7.9 Calibration Parameters . . . . . . . . . . . . . . . . . . . . . . . 28
7.9.1 R0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.9.2 ALPHA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.9.3 DELTA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.10 Operating Parameters . . . . . . . . . . . . . . . . . . . . . . . . 29
7.11 Serial Interface Parameters . . . . . . . . . . . . . . . . . . . . . 30
7.11.1 Baud Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.11.2 Sample Period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.11.3 Duplex Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.11.4 Linefeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8 Digital Communication Interface . . . . . . . . . . . . . . . . 33
8.1 Serial Communications . . . . . . . . . . . . . . . . . . . . . . . 33
8.1.1 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.1.2 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.1.2.1 Baud Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.1.2.2 Sample Period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.1.2.3 Duplex Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.1.2.4 Linefeed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.1.3 Serial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.2 Interface Commands . . . . . . . . . . . . . . . . . . . . . . . . 35
9 Test Probe Calibration . . . . . . . . . . . . . . . . . . . . . . 39
9.1 Calibrating a Single Probe. . . . . . . . . . . . . . . . . . . . . . 39
9.2 Dry-well Characteristics. . . . . . . . . . . . . . . . . . . . . . . 39
9.2.1 Heating and Cooling Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
9.2.2 Stabilization and Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
10 Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . 43
10.1 Calibration Points . . . . . . . . . . . . . . . . . . . . . . . . . . 43
10.2 Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . 43
10.2.1 Compute DELTA: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
10.2.2 Compute R
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& ALPHA: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
0
10.2.3 Accuracy & Repeatability. . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
11 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
12 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . 49
12.1 Troubleshooting Problems, Possible Causes, and Solutions . . . . 49
12.2 CE Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
12.2.1 EMC Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
12.2.2 Low Voltage Directive (Safety) . . . . . . . . . . . . . . . . . . . . . . . . . 51
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Figures and Tables
Table 1 International Electrical Symbols . . . . . . . . . . . . . . . . . . . . . 1
Figure 1 Heat shield installed on 9141calibrator . . . . . . . . . . . . . . . . . . 5
Figure 2 9141 Back Panel and Bottom . . . . . . . . . . . . . . . . . . . . . . 15
Figure 3 9141 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 4 Inserts available for the 9141 block assembly . . . . . . . . . . . . . . 17
Figure 5 Controller Operation Flowchart . . . . . . . . . . . . . . . . . . . . . 22
Figure 6 Serial Cable Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 2 9141 controller communications commands . . . . . . . . . . . . . . . 36
Table 2 9141 communication commands continued . . . . . . . . . . . . . . . 37
Figure 7 Typical Heating Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Figure 8 Typical Cooling Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . 41
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
9141 Dry-well 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.
GENERAL
•
DO NOT use this instrument in environments other than those listed in
the User’s Guide.
•
Inspect the instrument for damage before each use. DO NOT use the in
strument if it appears damaged or operates abnormally.
•
Follow all safety guidelines listed in the user’s manual.
•
Calibration Equipment should only be used by Trained Personnel.
•
If this equipment is used in a manner not specified by the manufacturer,
the protection provided by the equipment may be impaired.
•
Before initial use, or after transport, or after storage in humid or semi-hu
mid environments, or anytime the dry-well 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 re
quirements 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 apply
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2
1 Before You Start
Safety Information
ing power such as storage in a low humidity temperature chamber operat
ing at 50°C for 4 hours or more.
DO NOT use this instrument for any application other than calibration
•
work. The instrument was designed for temperature calibration. Any other
use of the instrument may cause unknown hazards to the user.
Completely unattended operation is not recommended.
•
Overhead clearance is required. DO NOT place the instrument under a
•
cabinet or other structure. Always leave enough clearance to allow for
safe and easy insertion and removal of probes.
If the instrument is used in a manner not in accordance with the equip
•
ment design, the operation of the dry-well may be impaired or safety haz
ards may arise.
This instrument is intended for indoor use only.
•
BURN HAZARDS
• DO NOT turn the instrument upside down with the inserts in place; the
inserts will fall out.
• DO NOT operate near flammable materials.
• Use of this instrument at HIGH TEMPERATURES for extended periods
of time requires caution.
• DO NOT touch the well access surface of the instrument.
• The block vent may be very hot due to the fan blowing across the heater
block of the dry-well.
• The temperature of the well access is the same as the actual display tem-
perature, e.g. if the instrument is set to 375°C and the display reads
375°C, the well is at 375°C.
•
For top loading dry-wells, the top sheet metal of the dry-well may exhibit
extreme temperatures for areas close to the well access.
•
The air over the well can reach temperatures greater that 200°C for high
temperature (400°C and higher) dry-wells. Note: Probes and inserts may
be hot and should only be inserted and removed from the instrument
when the instrument is set at temperatures less than 50°C. Use extreme
care when removing hot inserts.
•
DO NOT turn off the instrument at temperatures higher than 100°C. This
could create a hazardous situation. Select a set-point less than 100°C and
allow the instrument to cool before turning it off.
•
The high temperatures present in dry-wells designed for operation at
300°C and higher may result in fires and severe burns if safety precau
tions are not observed.
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ELECTRICAL SHOCK
•
These guidelines must be followed to ensure that the safety mechanisms
in this instrument will operate properly. This instrument must be plugged
3
9141 Dry-well Calibrator
User’s Guide
into a 115 VAC, 60Hz (230 VAC, 50Hz optional), AC only electric outlet.
The power cord of the instrument is equipped with a three-pronged
grounding plug for your protection against electrical shock hazards. It
must be plugged directly into a properly grounded three-prong receptacle.
The receptacle must be installed in accordance with local codes and ordi
nances. Consult a qualified electrician. DO NOT use an extension cord or
adapter plug.
If supplied with user accessible fuses, always replace the fuse with one of
•
the same rating, voltage, and type.
Always replace the power cord with an approved cord of the correct rat
•
ing and type.
HIGH VOLTAGE is used in the operation of this equipment. SEVERE
•
INJURY or DEATH may result if personnel fail to observe safety precau
tions. Before working inside the equipment, turn power off and discon
nect power cord.
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1.2.2
CAUTIONS
To avoid possible damage to the instrument, follow these guidelines.
• Always operate this instrument at room temperature between 41°F and
122°F (5°C to 50°C). Allow sufficient air circulation by leaving at least 6
inches (15 cm) of clearance around the instrument.
• Component lifetime can be shortened by continuous high temperature op-
eration.
• Hart Scientific strongly recommends using the heat shield (Figure 1) pro-
vided while operating the calibrator at temperatures above 200°C. The
heat shield protects the hub on the probes from heat and reduces the risk
of the user being burned by the hub. The heat shield gets very hot and
4
1 Before You Start
Safety Information
does not prevent all heat from reaching the hub. Be careful when remov
ing the heat shield or the probe from the well.
Figure 1 Heat shield installed on 9141calibrator
-
• DO NOT apply any type of voltage to the display hold terminals. Apply-
ing a voltage to the terminals may cause damage to the controller.
•
DO NOT use fluids to clean out the well. Fluids could leak into electron
ics and damage the instrument.
•
Never introduce any foreign material into the probe hole of the insert.
Fluids, etc. can leak into the instrument causing damage.
•
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 NOT slam the probe sheath in to the well. This type of action can
cause a shock to the sensor and affect the calibration.
•
The instrument and any thermometer probes used with it are sensitive in
struments that can be easily damaged. Always handle these devices with
care. DO NOT allow them to be dropped, struck, stressed, or overheated.
•
The Factory Reset Sequence (see Section 12, Troubleshooting) should be
performed only by authorized personnel if no other action is successful in
correcting a malfunction. You must have a copy of the most recent Report
of Calibration to restore the calibration parameters.
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5
9141 Dry-well Calibrator
User’s Guide
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
DO NOT operate this instrument in an excessively wet, oily, dusty, or
•
dirty environment. Always keep the well and inserts clean and clear of
foreign material.
The dry-well is a precision instrument. Although it has been designed for
•
optimum durability and trouble free operation, it must be handled with
care. Always carry the instrument in an upright position to prevent the
probe sleeves from dropping out. The convenient handle allows for hand
carrying the instrument.
If a mains supply power fluctuation occurs, immediately turn off the in
•
strument. Power bumps from brown-outs could damage the instrument.
Wait until the power has stabilized before re-energizing the instrument.
Allow for probe expansion inside the well as the block heats.
•
Most probes have handle temperature limits. Be sure that the probe handle
•
temperature limit is not exceeded in the air above the instrument.
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
6
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
7
2 Introduction
The Hart Scientific 9141 High-Temp Field Calibrator may be used as a portable
instrument or bench top temperature calibrator for calibrating thermocouple
and RTD temperature probes. The 9141 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 650°C (122°F to 1202°F). Temperature display of the 9141 is 0.1
degrees.
The dry-well calibrator features:
Rapid heating and cooling
•
Interchangeable multiple hole probe sleeves
•
Convenient handle
•
RS-232 interface
•
Switchable AC Input (115 VAC or 230 VAC)
•
Built in programmable features include:
• Temperature scan rate control
• Temperature switch hold
• Eight Setpoint memory
• Adjustable readout in °C or °F
The temperature is accurately controlled by Hart’s hybrid analog/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.
The LED front panel continuously shows the current well temperature. The
temperature may be easily set with the control buttons to any desired tempera
ture within the specified range. The calibrator’s multiple fault protection de
vices insure user and instrument safety and protection.
The 9141 dry-well calibrator was designed for portability, low cost, and ease of
operation. Through proper use, the instrument will provide continued accurate
calibration of temperature sensors and devices. The user should be familiar
with the safety guidelines and operating procedures of the calibrator as de
scribed in the instruction manual.
2 Introduction
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9
3 Specifications and Environmental Conditions
3 Specifications and Environmental
Conditions
3.1 Specifications
Specifications
Power
Ambient Temperature
Operating Range
Resolution
Readout
Accuracy
Stability
Uniformity
Controller
Heater
Heating Times
Cooling Times
Stabilization Time
Immersion Depth
Cooling
Fault Protection
Test Wells
Size
Weight
115 VAC (±10%), 50–60 Hz, 1000 Watts and 230 VAC (±10%), 50–60 Hz,
switchable
5–50°C(41–121°F)
50–650°C (122–1202°F)
0.1°C or °F resolution
Switchable °C or °F
±
0.5°C up to 400°C, ±1°C 400°C to 650°C, ±2°C for holes greater than 6.5
mm (0.25")
±
0.05°C at 100°C,±0.12°C at 500°C, ±0.12°C at 650°C
±0.1°C below 400°C
±0.5°C with similar sized wells above 400°C
Hybrid analog/digital controller with data retention
1000 W
12 minutes from ambient to 650°C
25 minutes from 650°C to 100°C
7 minutes
124 mm (4.875”)
2 speed internal fan
Sensor burnout and short protection, over temperature thermal cutout
1.125" dia. x 4.87" deep. Multi-hole inserts are available.
236 mm H x 109 mm W x 185 mm D (9.3" x 4..3" x 7.3")
3.6kg(8lbs.)
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:
•
temperature range: 5 - 50°C (41 - 122°F)
•
ambient relative humidity: maximum 80% for temperature <31°C, de
-
creasing linearly to 50% at 40°C
•
pressure: 75kPa - 106kPa
•
mains voltage within ± 10% of nominal
•
vibrations in the calibration environment should be minimized
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11
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