NI 9209 Calibration Procedure
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© National Instruments
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7
6.
Compare the average to the limits in Table 6.
Table 6.
NI 9209 Verification Test Limits for Single-Ended Voltage Accuracy
Note
The test limits listed in Table 6 are derived using the values in Table 8.
Note
The uncertainty of the calibration standard is not included in these limits.
7.
Repeat step 5 and 6 with the ADC timing mode on the NI 9209 set to high-speed.
8.
Set the calibrator to Standby mode (STBY).
9.
Repeat steps 3 through 8 for each test point listed in Table 6.
10. Disconnect the calibrator from the device.
11. Repeat steps 1 through 10 for each voltage channel on the NI 9209.
Adjustments
The following performance adjustment procedures describe the sequence of operation required
to adjust the NI 9209.
Voltage Accuracy Adjustment
Complete the following procedure to adjust the voltage accuracy performance of the NI 9209.
1.
Set the calibrator to Standby mode (STBY).
2.
Connect the NI 9209 to the calibrator as shown in Figure 1.
3.
Adjust the NI 9209 voltage accuracy.
a.
Initialize a calibration session on the NI 9209. The default password is
NI
.
b.
Input the external temperature in degrees Celsius.
c.
Call the DAQmx Get 9209 Calibration Adjustment Points function to obtain an array
of recommended calibration voltages for the NI 9209.
d.
Set the calibrator to a reference value determined by the array of recommended
calibration voltages.
e.
Set the calibrator to Operate mode (OPR).
Range (V)
Test Point
2-Year Limits
Minimum
Maximum
Location
Value
(V)
Lower Limit
(V)
Upper Limit
(V)
-10.00000
10.00000
Pos FS
10.00000
9.99014
10.00986
-10.00000
10.00000
Mid
0.00000
-0.00056
0.00056
-10.00000
10.00000
Neg FS
-10.00000
-10.00986
-9.99014
