10
|
ni.com
|
NI 9218 Calibration Procedure
8.
Compare the averages to the limits in Table 10.
9.
Repeat steps 3 through 8 for each test point in Table 10.
Note
The test limits listed in Table 10 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 device.
Voltage Accuracy Verification, 65 mV 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 4.
Figure 4.
Voltage Accuracy Verification Connections
3.
Set the calibrator voltage to a Test Point value indicated in Table 13.
4.
Set the calibrator to Operate mode (OPR).
5.
Configure the NI 9218 for the NI 9982 measurement adapters using MAX.
Table 10.
NI 9218 Verification Test Limits for Accuracy
Test Point
2-Year Limits
Location
Value (V)
Lower Limit (V)
Upper Limit (V)
Max
12
11.987
12.013
Mid
0
-0.002
0.002
Min
-12
-12.013
-11.987
NI 99
8
2
EX+
EX–
AI+
AI–
C
a
li
b
r
a
tor
–
+
NI 99
8
2
AI+
AI–
NI 921
8
D
S
UB/LEMO
CH 0
D
S
UB/LEMO
CH 1
EX+
EX–
