National Instruments PXIe-4080 Calibration Procedure page 13

DMM Settings
Range OCO Resistance
1 MΩ Off 1 MΩ
100 kΩ Off 100 kΩ
Note
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
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.
Calibrator Settings
Ext Comp
Sense
Off None
Off None
For the 1 MΩ and 100 kΩ measurements, subtract the corresponding
NI DMM
HI
LO
HI
LO
Not Connected
PXIe-4080/4082 Calibration Procedure | © National Instruments | 13
Tolerances
As-Found
ppm of ppm of
Reading Range
95 10
95 6
Calibrator
HI
LO
HI SENSE
LO SENSE
V-GUARD
As-Left
ppm of ppm of
Reading Range
32 2
15 2
OUTPUT SENSE
A
V-GUARD
AUX
CURRENT
GROUND