National Instruments NI PXIe-4080, Процедура калибровки, Страница: 13 / 28

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 | © National Instruments | 13