Keysight N9912A - Before Returning an Instrument to a Customer

3-6 Keysight N9912A Service Guide
Tests and Adjustments
Before Returning an Instrument to a Customer
3-
Before Returning an Instrument to a Customer
When finished servicing an N9912A analyzer, perform the following before
returning the unit to the customer:
— Set the Display Colors to Indoors and the display Brightness to 80% via 
Service (7) > Display.
— Perform an Operational Check as described in the following section.
— Connect and disconnect the external battery charger while the N9912A is
operating and confirm that the power cord icon is displayed appropriately
at the top of the display.
— Charge the battery to 80% or higher.