NI 9218 Calibration Procedure
|
© National Instruments
|
7
8.
Compare the average to the limits in Table 4.
9.
Repeat steps 3 through 8 for each test point in Table 4.
Note
The test limits listed in Table 4 are derived using the values in Table 32.
Note
The uncertainty of the calibration standard is not included in these limits.
10. Disconnect the calibrator from the NI 9218.
Voltage Accuracy Verification, 60 V mode
Complete the following procedure to determine the As-Found status of the NI 9218.
1.
Set the calibrator to Standby mode (STBY).
2.
Connect the NI 9218 to the calibrator as shown in Figure 2.
Figure 2.
Voltage Accuracy Verification Connections
3.
Set the calibrator voltage to a Test Point value indicated in Table 7.
4.
Set the calibrator to Operate mode (OPR).
5.
Configure the NI 9218 for the 9987 measurement adapters using MAX.
Table 4.
NI 9218 Verification Test Limits for Accuracy
Test Point
2-Year Limits
Location
Value (mA)
Lower Limit (mA)
Upper Limit (mA)
Max
15
14.929
15.071
Mid
0
-0.008
0.008
Min
-15
-15.071
-14.929
AI+
AI
–
NI 99
8
7
C
a
li
b
r
a
tor
–
+
AI+
AI
–
NI 99
8
7
NI 921
8
D
S
UB/LEMO
CH 0
D
S
UB/LEMO
CH 1
