Sonel WMGBMPI525 User Manual page 52

6.1 Monitoring of the power supply voltage
The level of the charge of the batteries or accumulators is currently indicated by the symbol in the
right upper corner of the display:
Note:

The displayed BAT symbol means insufficient power supply voltage and the need to charge the
accumulators,

Measurements realised with an insufficient meter power supply voltage are distorted with additional
errors which are impossible to ascertain by the user and thus they cannot constitute a basis for a
conclusion of correctness of the tested earthing system.
6.2 Replacement of batteries (accumulators)
MPI-525 meter is powered by 4 batteries (LR14). It can be also powered by the manufacturer's
accumulator package (SONEL NiMH).
Battery charger is installed inside the meter and cooperates only with the manufacturer's accumu-
lator package. The charger is powered by external power supply adapter. It can be also powered from
the car cigarette lighter socket. The accumulator package as well as the power supply adapter are the
additional accessories and can be purchase separately.
Test leads left in the sockets during replacement of the batteries or the package
of accumulators cause a risk of electric shock with a dangerous voltage.
In order to replace the package of accumulators it is necessary to do the following:

Remove all the test leads from the sockets and turn the meter off,

Remove the four screws of the accumulators/batteries compartment (in the lower part of the cas-
ing),
50
6 Power supply
Bartery charged.
Bartery low.
Bartery fully discharged.
WARNING:
MPI-525 – USER MANUAL
Bartery fully discharged,
measuring blocked.