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It is strongly recommended that you use the specified 24-volt DC adapter included
as an accessory to charge the rechargeable battery. Never rotate the rotary switch
while the battery is being charged because a DC voltage of 24 V is applied to the
charging terminals. Follow the procedures below to charge the battery:
1 Remove the test leads from the multimeter.
2 Turn the rotary switch to
3 Plug the DC adapter into a power outlet.
4 Insert the red (+) and black (–) banana plugs (4 mm plugs) of the DC adapter
The DC adapter can be replaced with a DC power supply set at DC 24 V with an
NOTE
overcurrent limit of 0.5 A.
5 The display will show a countdown timer of 10 seconds for the self-test to
Keysight U1253B User's and Service Guide
to the
and COM terminals respectively. Ensure that the polarity of
the connection is correct.
start. The multimeter will output short single-tone sounds to remind you to
charge the battery. Press
multimeter will automatically start charging after10 seconds. It is
recommended not to charge the battery if the battery capacity is over 90%.
.
to start charging the battery, or the
Maintenance
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