DMM Settings
Tolerances (ppm of range)
As-Found
As-Left
Range
OCO
100 MΩ
Off
10
6
10 MΩ
Off
10
2
1 MΩ
Off
1.2
1.2
100 kΩ
Off
6.5
5
10 kΩ
On
21.5
20.5
1 kΩ
On
201.5
200.5
100 Ω
On
2012
2005
5.
Remove the shorting bar from the PXIe-4081.
6.
Set the calibrator to
Standby
.
7.
Connect the PXIe-4081 to the calibrator using low thermal EMF cables, as shown in
Figure 1.
on page 6.
8.
Wait two minutes for thermal EMF to stabilize.
9.
Verify the accuracy for each configuration in the following table:
a)
Acquire the measurement at each specified configuration.
b)
Compare to the specified tolerances.
DMM Settings
Calibrator Settings
Tolerances
As-Found
As-Left
Range
2
OCO Resistance External
Sense
Compensation ppm of
Reading
ppm
of
Range
ppm of
Reading
ppm
of
Range
1 MΩ
Off
0 Ω
Off
None
-
-
-
-
100 kΩ Off
0 Ω
Off
None
-
-
-
-
100 MΩ Off
100 MΩ
Off
None
3000
10
500
6
10 MΩ
Off
10 MΩ
Off
None
130
10
86
2
1 MΩ
Off
1 MΩ
Off
None
60
1
16
1
100 kΩ Off
100 kΩ
Off
None
45
2.5
7
1
Note
For the 1 MΩ and 100 kΩ measurements, subtract the corresponding
0 Ω measurement as an offset null.
10. Connect the PXIe-4081 to the calibrator using low thermal EMF cables according to the
2-wire compensated configuration shown in the following figure.
2
For the 1 MΩ and 100 kΩ measurements, subtract the corresponding 0 Ω measurement as an
offset null.
12
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PXIe-4081 Calibration Procedure
