National Instruments 9224, Процедура калибровки

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Table 4. NI 9224 Verification Test Limits
Test Points Device Under Test Settings/Configuration
Location Value Lower Limit (VDC) Upper Limit (VDC)
Positive full-scale 9.5 9.485 9.515
Mid 0 -0.001161 0.001161
Negative full-scale -9.5 -9.515 -9.485
Note
The test limits listed in the NI 9224 Verification Test Limits table are derived
using values from the NI 9224 Accuracy Under Calibration Conditions table.
Adjustment
The following performance adjustment procedure describes the sequence of operation required
to adjust the NI 9224.
Accuracy Adjustment
Complete the following procedure to adjust the accuracy performance of the NI 9224.
1. Set the calibrator to Standby mode (STBY).
2. Connect the NI 9224 to the calibrator as shown in the
Accuracy Verification section.
3. Adjust the NI 9224.
a) Initialize a calibration session on the NI 9224. The default password is
NI
.
b) Input the external temperature in degrees Celsius.
c) Call the NI 9224 get C Series adjustment points function to obtain an array of
recommended calibration voltages for the NI 9224.
d) Set the calibrator to a reference value determined by the array of recommended
calibration voltages.
e) Set the calibrator to Operate mode (OPR).
f) Call and configure the NI 9224 adjustment function according to
NI 9224
Adjustment Configuration
table.
Table 5. NI 9224 Adjustment Configuration
Physical Channel Reference Value
cDAQ1Mod8/AI0:7 A reference value from the array of adjustment points
g) Set the calibrator to Standby mode (STBY).
h) Repeat steps d through g for each point in the array.
i)
Close the calibration session.
j) Close and commit the calibration session.
4. Disconnect the NI 9224 from the calibrator.
NI 9224 Calibration Procedure | © National Instruments | 5