Verifying 2-Wire Resistance - National Instruments PXI-4070 Manual

Verifying 2-Wire Resistance

Caution Step 2 must be performed correctly to avoid shorting on unconnected spade lugs.
© National Instruments Corporation
You have completed verifying the 4-wire resistance of the NI 4070. Select
one of the following options:
• If you want to continue verifying other modes, go to the Verifying
2-Wire Resistance section.
• If you do not want to verify other modes and you are performing a
post-adjustment verification, go to the
Procedures section.
• If you do not want to verify any additional modes and you are
performing a pre-adjustment verification, call
the session.
To verify the 2-wire resistance of the NI 4070, complete the following
steps:
1. Reset the calibrator.
2. Connect the calibration cable assembly with the connector block
plugged into the NI 4070 and with the spade lugs connected to the
appropriate binding posts on the calibrator, as described in Figure 3
and Table 1.
3. Wait two minutes for the thermal EMF to stabilize if the calibration
cable assembly was not used previously in this configuration.
Output 0 Ω on the calibrator with 2-wire compensation turned on,
4.
but with external sense turned off.
5. Call
niDMM_reset
6. Call
niDMM_ConfigureMeasurement
parameters:
• Function =
NIDMM_VAL_2_WIRE_RES
• Range =
100e6
• Resolution =
7. Call
niDMM_Read
8. Call
niDMM_ConfigureMeasurement
parameters:
• Function =
NIDMM_VAL_2_WIRE_RES
• Range =
10e6
• Resolution =
9. Call
niDMM_Read
Completing the Adjustment
to reset the NI 4070 to a known state.
100
and store the result as the 100 MΩ range offset.
10
and store the result as the 10 MΩ range offset.
29
to close
niDMM_close
with the following
with the following
NI PXI-4070 Calibration Procedure