Megger SMART THUMP ST16, User Manual

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M
AVTMST16 Rev 1 May 2016
12
Backup Battery
If the internal battery is becoming drained while fault locating, any 12 V battery
providing more than 50 A (e.g. a car battery) can be connected to the
12 V terminals
in order to extend the operation time or the unit must be
connected to an AC source (see below AC Line Operation).
Charging
The battery automatically is being charged as soon as the SMART THUMP has
been connected to 120/230 AC line power. Charging time on a fully drained
battery is about 10 to 12 hours. The progress of the charging process is indicated
by the battery charging status LED
. During charging, the LED lights yellow.
It turns to green, when the battery is full and charging is finished.
NOTE: Always charge the battery immediately after use. Lead-acid batteries
must always be kept in a charged condition. The battery life is longer
with an almost fully charged battery rather than fully discharged one.
Store the unit always at a full charge by keeping the charger connected
while the unit is not in use (trickle charge).
AC Line Operation
As soon as the AC power cord is connected to the receptacle of the SMART
THUMP and the AC line, the system is operating on AC power and being
charged at the same time.