National Instruments SCXI-1121 Calibration Procedure page 17

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Table 11. Excitation Calibration Potentiometer Reference Designators
Input Channel
Number
0
1
2
3
5. Configure the excitation channel for the 10 V excitation level.
Remove the 120 Ω resistor and connect the 800 Ω resistor across the
6.
output of the excitation channel.
7. Adjust the excitation voltage potentiometer until the voltage reading
falls between 10.02 and 9.98 V.
8. Repeat steps 1 through 7 for all remaining channels.
You have completed adjusting the voltage excitation channels.
Adjusting Current Excitation
Complete the following steps to adjust the current excitation:
1. Remove the resistor from the excitation channel if you have not already
done so.
2. Configure the channel for 0.150 mA current excitation level.
3. Set the DMM to current mode and connect it to the excitation channel
output you want to adjust. Adjust the excitation current potentiometer
until the current reading falls between 0.150060–0.149940 mA. Refer
to Figure 3 for the potentiometer location and Table 11 for the
potentiometer reference designator.
4. Configure the channel for 0.450 mA current excitation level.
5. Adjust the excitation current potentiometer until the current reading
falls between 0.450900–0.449100 mA. Refer to Figure 3 for the
potentiometer location and Table 11 for the potentiometer reference
designator.
6. Repeat steps 1 through 5 for all remaining channels.
You have completed adjusting the current excitation channels.
Excitation Channel
Voltage Mode
R10
R20
R30
R40
17
Current Mode
R7
R17
R27
R37
SCXI-1121 Calibration Procedure