C Using the Battery Option
128 Keysight 53150A/151A/152A Operating Guide
Replacing the Batteries
Counters equipped with the Battery option use sealed lead-acid VHS camcorder
batteries. You can obtain additional batteries of this type from Keysight (Keysight
P/N 53150-80010) and from other suppliers who carry test equipment and/or
video camera accessories.
Removing the Batteries
To remove the batteries, use the following procedure:
1 Turn off the Counter, and disconnect all external cables (including the power
cord).
2 Turn the two thumb screws that secure the battery sled to the Counter’s back
panel counterclockwise until both thumb screws are completely out of the
threaded holes in the back panel (see Figure C-3).
3 Slide the battery sled out the back of the Counter.
4 Lift the terminal end of either or both batteries up out of the battery sled, and
then pull the battery(ies) out of the sled.
NOTE
The thumbscrews require a considerable amount of turning force, since they pull
the battery sled partially out of the Counter and also extract the battery
terminals from the battery connector as you turn them. To prevent the battery
sled from binding and increasing the force necessary to turn the thumbscrews,
either turn both thumbscrews simultaneously, or alternately turn the
thumbscrews one-half turn each, until both thumbscrews are fully out of the
threaded holes in the back panel.
CAUTION
Avoid placing the battery sled and/or the batteries where the battery
terminals could contact any conductive surfaces.
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