Performance Verification 3
Keysight DAQ970A/DAQ973A Service Guide 79
3 Remove the module from the DAQ970A/DAQ973A mainframe. Retain the
copper shorts connected in step 1, and add another wire between Channel 01
L and Channel 11 L.
4 Plug the module back into the DAQ970A/DAQ973A mainframe. Perform a
4-wire resistance measurement for Channel 01 using the DAQ970A’s/
DAQ973A’s internal DMM. Ensure that all measurements are less than 2 W.
DAQM901A relay contact resistance verification (optional)
This procedure checks the relay contact resistance for the relays used in Channel
01 to 20 on the DAQM901A. It uses the internal DMM of the DAQ970A/DAQ973A
to make resistance measurements. To ensure accurate measurements, the
DAQ970A/DAQ973A has to be calibrated prior to this procedure.
1 Connect the copper shorts from H to L for each channel, from Channel 01 to
Channel 20.
2 Perform a 2-wire resistance measurement for each channel using the
DAQ970A/DAQ973A’s internal DMM. Ensure that all measurements are less
than 2 W.
3 Remove the module from the DAQ970A/DAQ973A mainframe. Retain the
copper shorts in connected in step 1, and add another wire between Channel
01 L and Channel 11 L.
4 Plug the module back into the DAQ970A/DAQ973A mainframe. Perform a
4-wire resistance measurement for Channel 01 using DAQ970A/DAQ973A’s
internal DMM. Ensure that all measurements are less than 2 W.
NOTE
Ensure that you have read the “Plug-in Module Test Considerations” on page 76.
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