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•
If you want to continue verifying other modes, proceed to the
Verifying 4-Wire Resistance
section.
•
If you do not want to verify any additional modes and you are performing a pre-
adjustment verification, close the session.
•
If you do not want to verify any additional modes, and you want to update the verification
time stamp, complete the following steps:
1.
Open a new calibration session to the instrument (with correct calibration password).
2.
Close the calibration session with the
Action
set to
Save
.
Verifying 4-Wire Resistance
Complete the following steps to verify 4-wire resistance:
1.
Set the calibrator to
Standby
2.
Connect the PXIe-4080/4082 to the calibrator using low thermal EMF cables, as shown in
the following figure.
Figure 2. 4-Wire Resistance Connection Configuration
OUTPUT
A
SENSE
AUX
CURRENT
V-GUARD
GROUND
NI DMM
HI
LO
HI SENSE
LO SENSE
Not Connected
Calibrator
HI
LO
HI SENSE
LO SENSE
V-GUARD
3.
Wait two minutes for thermal EMF to stabilize.
4.
Reset the PXIe-4080/4082.
5.
Configure the PXIe-4080/4082 for 4-wire resistance measurements with a resolution of
6.5 digits.
6.
Verify the accuracy for each configuration in the following table:
a)
Acquire the measurement at each specified configuration.
b)
Compare to the specified tolerances.
Note
Tolerances are provided instead of absolute limits because your
calibrator will have different discrete resistance values.
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PXIe-4080/4082 Calibration Procedure