NI VirtualBench Calibration Procedure
|
© National Instruments
|
9
8.
Call
DMM Read
. Subtract the saved value from step 4 and compare to the limits listed in
Table 4.
Note
Use the values in the
24 Hour Limits
column for a post-adjustment
verification
only.
Otherwise, use the values in the
1 Year Limits
column.
9.
Repeat steps 5 through 8 for each verification point listed for the 100 mV range in Table 4.
10. Generate 1.01 V verification point on the calibrator.
11. Call
DMM Configure Measurement
with the following parameters:
•
Function
=
DC Volts
•
Auto Range
=
FALSE
•
Manual Range
=
1
12. Set the input resistance of the VirtualBench by calling
DMM Configure DC Voltage
with the following parameter:
•
Input Resistance
=
10 GOhm
13. Call
DMM Read
. Compare to the limits listed in Table 4.
Table 4.
VirtualBench DC Voltage Verification Limits
Range
(V)
Verification
Point (V)
Input
Resistance
1 Year Limits (V)
24 Hour Limits (V)
Lower
Upper
Lower
Upper
0.1
0.101
10 GΩ
0.100980
0.101020
0.100996
0.101004
0
-0.000005
0.000005
-0.000003
0.000003
-0.101
-0.101020
-0.100980
-0.101004
-0.100996
1
1.01
10 GΩ
1.009800
1.010200
1.009960
1.010040
0
-0.00005
0.00005
-0.00002
0.00002
-1.01
-1.010200
-1.009800
-1.010040
-1.009960
10
10.1
10 GΩ
10.0980
10.1020
10.0997
10.1003
0
-0.0005
0.0005
-0.0002
0.0002
-10.1
-10.1020
-10.0980
-10.1003
-10.0997
100
101
10 MΩ
100.960
101.040
100.993
101.007
0
-0.005
0.005
-0.002
0.002
-101
-101.040
-100.960
-101.007
-100.993
300
150
10 MΩ
149.933
150.068
149.979
150.021
0
-0.015
0.015
-0.014
0.014
-150
-150.068
-149.933
-150.021
-149.979