Test Considerations; Environmental Conditions - Keysight Technologies DAQ970A Service Manual

Test Considerations

Errors may be induced by AC signals present on the input leads during a self–test.
Long test leads can also act as an antenna causing pick–up of AC signals.
For optimum performance, all procedures should comply with the following
recommendations:

Environmental conditions

– Assure that the calibration ambient temperature (T
– Assure that the ambient relative humidity is less than 80%.
– Allow at least a 60-minute warm-up period with a 4-wire copper short and the
Keysight DAQ970A/DAQ973A Service Guide
18 °C and 28 °C. Ideally the calibration should be performed at 23 °C ± 1 °C.
5-wire input test signal cable connected to the respective channels in the
DAQM901A multiplexer module installed in slot 300 before verification or
adjustment. For more information, see
Calibration Procedures
) is stable and between
cal
"Input Connections"
2
on page 37.
47