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NI 9216/9226 Calibration Procedure
Adjustments
The following performance adjustment procedure describes the sequence of operation required
to adjust the NI 9216/9226.
Accuracy Adjustment
Complete the following procedure to adjust the accuracy performance of the NI 9216/9226.
1.
Set the calibrator to Standby mode (STBY).
2.
Connect the desired channel of the NI 9216/9226 to the calibrator as shown in Figure 1.
Connect only one channel at a time.
3.
Adjust the desired channel of the NI 9216/9226.
a.
Initialize a calibration session on the NI 9216/9226. The default password is
NI
.
b.
Input the external temperature in degrees Celsius.
c.
Call the DAQmx Get NI 9216/9226 Calibration Adjustment Points function to obtain
an array of recommended calibration resistance values.
d.
Set the calibrator to a reference value determined by the array of recommended
calibration voltages.
e.
Set calibrator COMP to 4-wire.
f.
Set the calibrator to Operate mode (OPR).
g.
Call and configure the NI 9216/9226 adjustment function according to Table 5.
Note
Use appropriate channel number in place of “x” in “AIx.” For example, use
AI3 for channel 3.
Note
The module acquisition is started each time the adjust function is called.
h.
Set the calibrator to Standby mode (STBY).
i.
Repeat steps d through h for each point in the array.
j.
Close the calibration session with action commit.
4.
Disconnect the NI 9216/9226 channel from the calibrator.
5.
Repeat steps 2 through 4 to calibrate any other desired channel of NI 9216/9226.
Table 5.
Gain Adjustment Configuration
Physical Channel
Reference Value
AIx
The reference resistance value from the array
of adjustment points
