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DMM Settings
Calibrator Settings
Tolerances
As-Found
As-Left
Range OCO Resistance
Ext
Sense
Comp
ppm of
Reading
ppm of
Range
ppm of
Reading
ppm of
Range
1 MΩ
Off
1 MΩ
Off
None 95
10
32
2
100 kΩ Off
100 kΩ
Off
None 95
6
15
2
Note
For the 1 MΩ and 100 kΩ measurements, subtract the corresponding
0 Ω measurement as an offset null.
10. Connect the PXIe-4080/4082 to the calibrator using low thermal EMF cables, as shown in
the following figure.
Figure 3. 2-Wire Resistance Low Range Connection Configuration
OUTPUT
A
SENSE
AUX
CURRENT
V-GUARD
GROUND
NI DMM
HI
LO
HI
LO
Not Connected
Calibrator
HI
LO
HI SENSE
LO SENSE
V-GUARD
11. Wait two minutes for the thermal EMF to stabilize.
12. Verify the accuracy for each configuration in the following table:
a)
Acquire the measurement at each specified configuration.
b)
Compare to the specified tolerances.
PXIe-4080/4082 Calibration Procedure
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© National Instruments
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