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NI 9207 Calibration Procedure
Current Accuracy Adjustment
Complete the following procedure to adjust the current accuracy performance of the NI 9207.
1.
Set the calibrator to Standby mode (STBY).
2.
Connect the NI 9207 to the calibrator as shown in Figure 2.
3.
Adjust the NI 9207 current accuracy.
a.
Initialize a calibration session on the NI 9207. The default password is
NI
.
b.
Input the external temperature in degrees Celsius.
c.
Call the NI 9207 get C Series adjustment points function to obtain an array of
recommended calibration currents for the NI 9207.
d.
Set the calibrator to a reference value determined by the array of recommended
calibration currents.
e.
Set the calibrator to Operate mode (OPR).
f.
Call and configure the NI 9207 gain instance of the adjustment function according to
Table 9.
g.
Set the calibrator to Standby mode (STBY).
h.
Repeat steps d through g for each calibration current in the array.
i.
Disconnect the calibrator from the NI 9207. Ensure that there are no connections to
the NI 9207.
j.
Call the NI 9207 offset instance of the adjustment function for the current channel.
k.
Close the calibration session.
4.
Remove the connections from the NI 9207.
5.
Repeat steps 1 through 4 for each current channel on the NI 9207.
EEPROM Update
When an adjustment procedure is completed, the NI 9207
internal calibration memory
(EEPROM) is immediately updated.
If you do not want to perform an adjustment, you can update the calibration date and onboard
calibration temperature without making any adjustments by initializing an external calibration
,
setting the C Series calibration temperature, and closing the external calibration.
Table 9.
Gain Adjustment Configuration
Physical Channel
Reference Value
cDAQMod8/ai
x
The reference value from the array of adjustment points
