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SCC-TC Series Thermocouple Input Modules User Guide 12 ni.com
Calibrating the SCC-TC0X Using a Thermocouple
Calibrator
To calibrate the system using a thermocouple calibrator, complete the
following steps:
1. Make sure that the thermocouple connections at both the SCC and the
thermocouple calibrator are at the same temperature.
2. Connect the thermocouple calibrator to the SCC-TC0X. For best
results, use thermocouple wire of the same length and type that you
use in the thermocouple.
3. Set the thermocouple calibrator to the required calibration
temperature.
4. Measure the calibrator voltage using the SCC-TC0X.
5. Convert the measured calibrator voltage to a temperature measurement
as described in the Converting Voltage Measurements to Temperature
Measurements section.
6. Adjust the potentiometer on the top of the SCC-TC0X so that the
measured temperature is equal to the calibration temperature.
Converting Voltage Measurements to Temperature
Measurements
Note NI-DAQ includes thermocouple and thermistor conversion utilities that implement
the conversions required in steps 3 and 5 of the following procedure. Refer to your
software documentation for more information on these utilities.
Your software environment may return only voltage measurements from
E Series DAQ devices. If so, you must convert voltage measurements to
temperature measurements. To make this conversion, complete the
following steps:
1. Measure the thermocouple voltage.
a. Read the thermocouple channel on the E Series DAQ device
V
ESERIES
[CH(X)].
b. Calculate the thermocouple voltage by using the following
formula:
V
TC
V
ESERIES
100
---------------------=