Charging Times; Backlight - Agilent Technologies E4419B User Manual

Charging Times

The battery charges automatically when the power meter is connected to an
AC source. From an empty state, the battery is fully charged in less than two
hours. After approximately 50 minutes, the battery has enough charge to
enable one hour of operation with the backlight on. After approximately 35
minutes, the battery has enough charge to enable 1 hour of operation with the
backlight off.

Backlight

When you are operating the power meter under battery power, you can turn
the display backlight off or on or set it to timed mode. In timed mode, the
display backlight turns off 10 minutes after the last key is pressed. The display
can be turned on again by pressing any key.
Working with the backlight off reduces the drain on the battery and increases
the operating time available by approximately 50%. The display can be
comfortably read in ambient daylight with the backlight off.
To access the backlight menu, press
softkeys on the menu to select either
If the power meter is connected to an AC power source, the backlight menu is greyed out
N O T E
and the backlight is permanently on.
E4419B Power Meter User's Guide
Power Meter Operation
More Service Battery
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On Off Timed
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