•
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.
10
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PXIe-4080/4082 Calibration Procedure