Isolated Analog Input Modules User Guide

SCC-AI Series Isolated Analog Input Modules 14 ni.com
Calibrating Gain and Offset Errors
The SCC-AIXX is calibrated at the factory before shipment. If you want to
adjust the gain of the SCC-AIXX in your system using your E Series DAQ
device, you need a voltage source that is several times more accurate than
the SCC itself and capable of providing the DC voltage shown in Table 1-3.
To adjust the gain of the SCC-AIXX, complete the following steps:
1. Select the desired SCC-AIXX channel on the E Series DAQ device.
2. Set the gain on the E Series DAQ device so that its input range is ±10 V.
3. Connect the voltage source to the screw terminals of the desired
channel on the SCC-AIXX.
4. Apply the voltage given in Table 1-3 that corresponds to the
SCC-AIXX module. For example, if you have an SCC-AI03, you must
apply 8 VDC.
5. Using your software, have the E Series DAQ device read the desired
channel on the SCC-AIXX and record the value.
6. Input 0 VDC to the SCC-AIXX.
7. Use the E Series DAQ device to read that channel and record the value.
8. Subtract the values read (first reading – second reading).
Table 1-3. SCC-AIXX Input Voltage Requirements
Module Input Range
SCC-AI01 40 V
SCC-AI02 16 V
SCC-AI03 8 V
SCC-AI04 4 V
SCC-AI05 800 mV
SCC-AI06 80 mV
SCC-AI07 40 mV
SCC-AI13 8 V
SCC-AI14 4 V