Advertisement
b.
Configure the AI voltage channel timing according to Table 3.
Samples Per Channel
10,000
c.
Start the task.
d.
Read samples from the NI 9220.
e.
Average the samples.
f.
Clear the task.
6.
Compare the average of the samples to the test limits in Table 4.
Range (V)
Min
Max
-10.000
10.000
-10.000
10.000
-10.000
10.000
The test limits listed in Table 4 are derived using the values in Table 6.
Note
7.
Repeat steps 3 through 6 for each Test Point in Table 4.
8.
Set the calibrator to Standby mode (STBY).
9.
Disconnect the NI 9220 from the calibrator.
10. Repeat steps 1 through 9 for each channel on the NI 9220.
Adjustment
The following performance adjustment procedure describes the sequence of operation required
to adjust the NI 9220.
Accuracy Adjustment
Complete the following procedure to adjust the accuracy performance of the NI 9220.
1.
Set the calibrator to Standby mode (STBY).
2.
Connect the NI 9220 to the calibrator as shown in Figure 1.
3.
Adjust the NI 9220.
a.
Initialize a calibration session on the NI 9220. The default password is
b.
Input the external temperature in degrees Celsius.
Table 3. NI 9220 Timing Configuration
Acquisition Mode
Finite
Table 4. NI 9220 Test Limits
Test Point
Location
Value (V)
Max
9.500000
Mid
0.000000
Min
-9.500000
NI 9220 Calibration Procedure | © National Instruments Corporation | 5
Rate (kS/s)
1-Year Limits
Lower Limit (V)
9.497865
-0.00090
-9.502135
100
Upper Limit (V)
9.502135
0.00090
-9.497865
.
NI
Advertisement
