3 Performance Verification
84 Keysight DAQ970A/DAQ973A Service Guide
DAQM903A shorted relay contact verification
This procedure uses an external DMM to make 2-wire ohms measurements across
all open terminals on the DAQM903A. As this is to verify open or shorts only,
measurement accuracy is not required, so a 2-wire ohms measurement with
handheld test probes is sufficient.
1 Install the DAQM903A module in slot 100. Close Channels 01 through 20.
Remove the module from the DAQ970A/DAQ973A.
2 Measure the resistance from the CM terminal to the NC terminal on each
channel. Ensure that they are “open” or more than 10 M.
3 Install the module in slot 100. Open Channel 01 through 20. Remove the
module from the DAQ970A/DAQ973A.
4 Measure the resistance from the CM terminal to the NO terminal on each
channel. Ensure that they are “open” or more than 10 M.
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