Plug-In Modules; Plug-In Module Test Considerations - Keysight Technologies 34959A Service Manual

Plug-in Modules

Plug-in Module Test Considerations

For optimum performance, all test procedures should comply with the following
recommendations:
– Assure that the calibration ambient temperature is stable and between 18 °C
– Assure ambient relative humidity is less than 80%.
– Install the plug-in module and allow a 1 hour warm-up period before
– Use shielded twisted pair PTFE insulated cables to reduce settling and noise
– Remove all user wiring and connections from the plug-in modules before
– Use 4-wire Ohms measurement techniques for checking relay contact
Keysight 34980A Service Guide
and 28 °C. Ideally the calibration should be performed at 23 °C ± 1 °C.
verification or adjustment.
errors. Keep the input cables as short as possible.
verification or adjustment.
resistance. Check directly at the terminals where possible.
Calibration Procedures 3
61