NI 9269 Calibration Procedure
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© National Instruments
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5
Table 4.
NI 9269 Accuracy Verification Test Limits
Note
Test limits in Table 4 are derived using the values in Table 6.
Adjustment
The following performance adjustment procedure
describes the sequence of operation required
to adjust the NI 9269.
Accuracy Adjustment
Complete the following procedure to adjust the accuracy performance of the NI 9269.
1.
Adjust the NI 9269.
a.
Initialize a calibration session on the NI 9269. The default password is
NI
.
b.
Input the external temperature in degrees Celsius.
c.
Call the NI 9269 get C Series adjustment points function to obtain an array of
recommended calibration voltages for the NI 9269.
d.
Connect the DMM to the NI 9269 as shown in Figure 1.
e.
Set the DMM to read DC voltage in the minimum range required to cover the NI 9269
output range of ±10 V.
f.
Call and configure the NI 9269 setup calibration function with the DAC value
obtained from the array of recommended calibration voltages.
g.
Wait the appropriate amount of time for the DMM measurement to settle.
h.
Read the NI 9269 output voltage measurement from the DMM.
i.
Call and configure the NI 9269 adjustment function according to Table 5.
j.
Repeat steps f to i for each calibration voltage in the array.
k.
Close the calibration session.
l.
Disconnect the DMM from the NI 9269.
2.
Repeat step 1 for each channel on the NI 9269.
Range (V)
Test Point
1-Year Limits
Min
Max
Location
Value (V)
Lower
Limit (V)
Upper
Limit (V)
-10.000
10.000
Max
9.500000
9.492730
9.507271
-10.000
10.000
Mid
0.000000
-0.001571
0.001571
-10.000
10.000
Min
-9.500000
-9.507271
-9.492730
Table 5.
Adjustment Configuration
Physical Channel
Reference Value
cDAQMod8/ao
x
The NI 9269 output voltage measured from the DMM.
