National Instruments NI 9227, Calibration Procedure

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6 | ni.com | NI 9227 Calibration Procedure
d. Read samples from the NI 9227.
e. Average the samples.
f. Stop and clear the task.
6. Compare the per-channel averages to the limits in Table 4.
7. Set the calibrator to Standby mode (STBY).
8. Repeat steps 3 through 7 for each test point in Table 4.
9. Disconnect the calibrator from the device.
Note
The test limits listed in Table 4 are derived using the values in Table 13.
Gain Matching Verification
Complete the following procedure to determine the As-Found status of the NI 9227.
1.
Connect the NI 9227 to the function generator as shown in Figure 2.
Figure 2.
Gain Matching Verification Connections
Table 4.
NI 9227 Verification Test Limits for Accuracy
Range Test Point 1-Year Limits
Min
(A
rms
)
Max
(A
rms
) Location
Value
(A
DC
)
Lower Limit
(A
DC
)
Upper Limit
(A
DC
)
-5 5 Max 5.00 4.990758 5.009242
Mid 0.00 -0.004242 0.004242
Min -5.00 -5.009242 -4.990758
NI 9227
F u nction Gener a tor
HI
50
Ω
LO
AI1
–
+
AI0
–
+
AI2
–
+
AI 3
–
+
50
Ω
~