Learn about practical solutions for automating temperature calibration in the field and at the bench. Transcat and Fluke Calibration cover how to set-up each solution and the pros and cons of each.
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Automating Temperature Sensor Calibration
1. Today’s Web Seminar
Automating Temperature Sensor Calibration
Automating temperature sensor calibration can boost your productivity and ensure
that you’re producing consistent results, time after time. Attend this free webinar to
learn about practical solutions for automating temperature calibration in the field and
at the bench. We’ll cover how to set-up each solution and the pros and cons of each.
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2. Web Seminar Format
Presentation:
– 45 minutes
– We’ll cover three solutions for Automating Temperature
Calibration:
1. 754 Documenting Process Calibrator
2. 1586A Super-DAQ Precision Temperature Scanner
3. MET/TEMP II Temperature Calibration Software
Questions & Answers:
– After we discuss each solution, we’ll pause to answer questions
– Text your questions about that solution to the Host using the
chat window. We’ll answer as many as possible during the Q&A
portion.
Webinar slides and recording:
– Those registered for today’s seminar will receive an email with
the presentation slides and a link to access the recorded
presentation.
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3. Agenda
• Why automate temperature sensor calibration?
• Three practical solutions
• How to set them up
• Pros and cons of each one
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4. Why Automate Sensor Calibration?
• Be more productive
Reduce the number of repetitive,
time-consuming tasks required for a
calibration
Free-up time for other important jobs
Temperature Calibration takes time!
• Be confident your results are
consistent
Time after time
No matter who does the work
Drift and Out-of-Tolerance conditions
are not operator/test dependent
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5. Three Practical Solutions
Automating with a Documenting
Process Calibrator
Example: Connecting a 754 to a Dry-Well to test a
temperature probe and transmitter; Use DPC track
to collect the data
Automating without software
Example: Connecting 1586A to Dry-Well to calibrate
a K-TC Probe; use USB to collect data
Automating with software
Example: Calibrate K-TC Probes and calculate
correction coefficients
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6. • Fluke 754 connected to Fluke
dry block using optional
communication cable
• Configure test on 754
– Source: Dry block
– Measure: Transmitter 4-20
mA
– Set test points and delay
time
• 754 conducts test, stores and
documents results with
DPC/TRACK2 software
Solution 1. Automating with 754
Documenting Process Calibrator
7. Why is a dry-well required?
Simulating a TC or RTD
All sensors drift over time.
When sourcing temperature from
the calibrator, the sensor is
disconnected from the transmitter.
The calibrator sources the voltage
or the resistance to the transmitter
and the sensor is not tested.
Without a drywell, the largest
source of error (75%) is ignored!
8. Example: Temperature Loop Calibration
• Temperature sensor is removed
from the process but remains
connected to the loop and placed
in a bath/dry-well for traceability
• Bath or block temperature will be
heated or cooled to each
calibration point
Temperature sensor
under test
Insert
Dry-well sensor
Heated block
Dry-well’s thermometer/controller
4 to 20 mA
4 to 20 mA signal
Dry-well display
Temperature
input
Current
output
Percent of
span
0 °C 4 mA 0 %
75 °C 8 mA 25 %
150 °C 12 mA 50 %
225 °C 16 mA 75 %
300 °C 20 mA 100 %
11. Source Options
– 9100S/9102S Handheld dry-wells
-10 ºC to 375 ºC
– 6102/7102/7103 Micro-Baths
-30 ºC to 200 ºC
– 9103/9141 field dry-wells
-25 ºC to 650 ºC
– 9170/9171/9172/9173 Lab Metrology Wells
-45 ºC to 700 ºC
– 9142/9143/9144/9190A Field Metrology Wells
-95 ºC to 660 ºC
– 9150/9118A Thermocouple Furnaces
150 ºC to 1200 ºC
Measure Options
– DCV, 4-20mA(Loop Power), Ohms, Hz, TCs, RTDs
(Pt, Cu, Ni)
Options using Fluke 754 as control
12. DPC/TRACK2 Software
• Includes an
instrumentation data-base
• Create and schedule tests
• Load and unload the 753
or 754
• Print a variety of standard
reports
• Manage calibration data
13. Two great resources for more info:
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Application Note (2148146D) Temperature Applications and Solutions (6005929a) pg. 4-5
14. • 1586A Super-DAQ connected and
controlling 9190A
• Reference Probe connected to
1586A
• UUTs connected to 1586A
– Supports up to 40 probes at once,
practical limit is the heat source
• Easily export .CSV format data on
a USB stick for analysis with a PC
spreadsheet program
• 1586A comes with FlukeDAQ 6.0
Lite data collection software
– Can provide more sophisticated
status display during test
Solution 2. Automating with the
1586A Super-DAQ
15. 1586A Super-DAQ (overview cont.)
Up to a total of 45 isolated inputs and
speeds up to 10/sec
Records up to 20 MB of data to internal
memory or directly to a USB flash drive
Best-in-class temperature measurement
accuracy:
PRTs: ± 0.005 ºC
Thermistors: ± 0.002 ºC
Thermocouples: ± 0.3 ºC (internal CJC)
Internal High-Capacity
Module
External DAQ-STAQ
Multiplexer
16. • All Fluke heat sources that
contain a serial interface!
– Over 35 different calibration
baths
• Cover the range of -80 ºC
to 550 ºC
– Dry Wells, Metrology Wells,
Micro-Baths
– Furnaces
• To 1200 ºC
Fluke 1586A Automation Options
17. Solution 2. Automating without
software
5. Choose setpoint temperatures, tolerance,
required stability, and soak time.
6. Start the test
Read the “Automated Temperature Sensor
Calibration with the 1586A Super-DAQ”
Application Note (6002875A) for more information
1. Connect Dry-Well to 1586A’s control port (on
back) with serial cable
1. Cable supplied with all Fluke Dry-Wells
2. Insert Reference and probe to be calibrated
3. Connect all probes to 1586A
3. Press Channel Setup to select the channels
and choose thermometer type
4. Press Test Setup to determine the number
and sequence of measurements
5. Results stored on 1586A internal
memory or external USB memory
18. 1586A Results
• Files stored in CSV
format, easily read by
Excel or other analysis or
reporting tools
• Two files stored with each
test
– Setup.csv – records all
configuration details
– Data.csv – all
measurement data with
time tag
20. Solution 3. MET/TEMP II Temperature
Calibration Software v5.0
MET/TEMP II automates calibration
for a broad workload of temperature
sensors using many supported
thermometer readouts and heat
sources
Proven, trusted calibration software:
MET/TEMP II version 5 is an updated
release of the well-known software used by
hundreds of metrologists & technicians
worldwide in their calibration labs.
Version 5 features include:
• Compatibility with Microsoft Windows 7
and 8/8.1 operating systems
• Support for the latest temperature
sources -- 9190A Ultra-Cool Field
Metrology Well and 9118A Thermocouple
Calibration Furnace
21. MET/TEMP II v5.0
Automates calibration for a wide
range of temperature sensors:
• Thermocouples, RTDs, SPRTs, thermistors,
and even liquid-in-glass (LIGs), bi-metallic
thermometers, and connected sensors that
can’t be attached to a readout
Test a broad sensor workload:
• Up to 100 sensors at a time
• Up to 40 temperature points for testing
sensors
Choice of calibration method:
• Comparison, fixed-point or mixed
Support for many test equipment
configurations
• A variety of digital thermometer readouts
(handhelds to bench models)
• Many heat sources (dry-wells, Metrology
Wells, Micro-Baths, calibration baths and
furnaces)
22. MET/TEMP II hardware connections:
Computer with Windows 7 or 8/8.1
MET/TEMP II Software
USB to RS-232 Adapter
RS-232 Cable
Smart Switch
(RS-232 multiplexer)
Reference Readout/Scanner
1502A/1504 Tweener
1523/1524 Thermometers
1529 Chub-E4
1560 Black Stack
1594A/1595A Super Thermometer
Up to 6 null modem cables to connect
test equipment to Smart Switch.
Temperature Source
914X Field Metrology Wells
9190A Ultra-Cool Field Metrology Well
917X Metrology Wells
9100S/9102S Handheld Dry-Well
6102/7102/7103 Micro-Baths
6330/73X0 Compact Baths
6331/73X1 Deep Well Compact Baths
9118A/9150 Furnaces
590X/591X/592X/594X Fixed Point Cells
913X/418X Infrared Calibrators
1620A DewK for ambient
temperature and %RH
monitoring
23. MET/TEMP II Configuration:
• Six basic configuration steps
1. Computer COM Port
2. Temperature Reference
3. Test Probe Scanner (UUT
measurent)
4. Heat Source set-up
• Multiple heat sources – faster
test time, better uncertainty
5. Set Points (up to 40)
• Tolerance
• Stability
• Duration
6. Test Probes
• Model
• Serial Number
• Owner
24. • Test Status
– Elapsed time
– Status
• Set-point
– Set-point
– Tolerance
– Stability
– Heat Source
• Current Reference reading
– Digital value
– Configurable graph
• Reference probe only
• One UUT reading
– Select channel and when
measured, will display value
MET/TEMP II – run time
25. MET/TEMP II Results: Coefficients
• Coefficient calculations for PRTs, TCs and Thermistors
• ITS-90, CVD, IPTS-68, Polynomial, Steinhart-Hart
28. Summary of Solutions for
Automating Temperature Sensor Calibration
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754 DPC 1586A Super-DAQ MET/TEMP II Software
Sensors that can be calibrated PRTs, Thermocouples,
Thermistors
PRTs, Thermocouples, Thermistors SPRTs, PRTs, Thermocouples,
Thermistors, Liquid-in-glass, Bi-
metallic thermometers
Readout options 754 DPC 1586A Super-DAQ 1502A/1504 Tweener, 1523/1524
Reference Thermometer, 1529 Chub-
E4, 1560 Black Stack, 1594A/1595A
Super-Thermometer
Temperature source options Drywells, Field Metrology
Wells, Micro-Baths
Drywells, Field Metrology Wells,
Metrology Wells, Micro-Baths, Baths,
Furnaces
Drywells, Field Metrology Wells,
Metrology Wells, Micro-Baths, Baths,
Furnaces, Fixed Point Cells, IR
Calibrators
Sensors per test One Up to 40 Up to 100
Reference probes and temperature
sources per test
No external reference, One
temperature source
Two external references, One
temperature source
One reference, up to four
temperature sources
System accuracy Good (limited to display) Better (using external reference probe) Best (using 159X readout and fixed
point cells)
Test documentation DPC/Track Software
Stores and documents results
Import .CSV file to PC spreadsheet
program for analysis
FlukeDAQ 6.0 Lite Software for data
collection
MET/TEMP II v5 Software
Produces calibration reports
compliant to ANSI/NCSL Z540.3
Probe coefficient calculation No No Part of MET/TEMP II