Keysight Technologies P939 A Series User Manual page 49

This instrument has auto-ranging line voltage input; be sure the supply
voltage is within the specified range and voltage fluctuations do not
exceed 10% of the nominal supply voltage. The instrument can
operate with mains supply voltage fluctuations up to ± 10% of the
nominal voltage.
The mains wiring and connectors shall be compatible with the connector
used in the premise electrical system. Failure to ensure adequate earth
grounding by not using the correct components may cause product damage
and serious injury.
The input terminals for this product are classified as Measurement
Category None.
Keysight P939xA Streamline Customs User's Guide 49