Page 977 - techequipmentscatalogue2016

FL.UKE ®

Simulating thermocouples and RTDs
for calibration and testing

Thermocouples and RTDs are the most common sensors used in
process temperature measurements.

Simulating a process sensor signal into a process instrument or
control system input enables a technician to verify whether the
device responds correctly to the temperature measured by the
instrument. There are many different ways to simulate these
sensors for testing purposes.

You can use a mV dc source and a mVvs temperature look up table
(below on the left), for simulating thermocouples or a resistance
decade box and resistance vs temperature look up table (below
on the right), for simulating RTDs. This method, however, has
become outdated with modem temperature calibrators that do
the conversion for the user. With modem calibrators, simply select
the sensor type to simulate, input the temperature to source and
connect to the devices under test.

Thermocouple Table - RTD Table - Temperature vs Resistance
Temperature vs mV
. .r:::.1!mII . .r:::.m. . .r:::.m.
- - - - -o 0.119 o 100.00 0.39
10 0.39
20
30 1 100.39 0.39
40
50 2 100.78 0.39
60
70
80
90
100 4.096 4.136 4.179 4.220

Suggested test tools

712 RTD 714 7526A 726 Precision - : ($
Temperature Thermocouple Precision Process Multifunction
Calibrator Temperature Calibrator Process 754
Calibrator Calibrator Documenting
Process
www.tech-equipments.comlsales@tech-equipments.com Calibrator

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