National Instruments SCC-TC02 用户手册

下载
页码 16
© National Instruments Corporation
9
SCC-TC Series Thermocouple Input Modules User Guide
Calibrating System Offsets
To calibrate the offset voltage of the SCC-TC0X in the system using the 
E/M Series DAQ device, complete the following steps. The E/M Series 
DAQ device must be powered for 30 minutes before you calibrate the offset 
voltage.
1.
Select the desired channel and gain on the E/M Series DAQ device.
2.
Short the inputs on the SCC-TC0X screw terminals or miniplug.
3.
While acquiring data on the selected channel, use a screwdriver to 
adjust the potentiometer protruding through the top of the module until 
you read 0 VDC.
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 
 section.
6.
Adjust the potentiometer on the top of the SCC-TC0X so that the 
measured temperature is equal to the calibration temperature.