Sib Geofiz Pribor Ltd
If during operation the battery voltage drops down to 5.3 V, the Tester will be
automatically switched off after giving three audible signals in succession. In attempting
to switch on power supply of the Tester, the battery of which is discharged to 5.3 V and
below, the Tester is switched on, gives a triple audible signal and is switched off right
away.
Figure 1
Figure 2
3.2. Charging
The battery can be charged using the mains adapter included in delivery, an external
storage battery with the 12 V rated voltage or any other external power supply with a
voltage from 10.5 to 16 volts and permissible load current no less than 0.5A. The
Tester is furnished with built-in circuits to ensure protection against backward voltage,
over-voltage and current overload upon connection of an external power supply.
ATTENTION! When using an external power supply operating from 220AC
mains, it is necessary to make sure first that it functions properly. The DC
output circuit should be galvanically isolated from the AC input circuit!
Connect an external power supply to the “+12V” socket of the Tester. If the external
power supply voltage is within the permissible limits, the battery starts charging as
demonstrated by flashing green light of the LED indicator. Steady red light shows that
the external power supply voltage is beyond the permissible limits or current consumed
from the external power supply has exceeded 1A.
During charging it is permissible to switch on the Tester and use it for the purpose
intended. The Tester consumes no power from the built-in battery either during charging
or upon its completion, being powered by the external supply as long as it is connected.
After disconnection of the external power supply, the Tester will automatically switch to
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