Power Supply; Monitoring Of The Power Supply Voltage; Replacement Of Accumulators - Sonel MMR-620 Operating Manual

Power
supply
5.1

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:
Charge
of ac-
cumula-
tors
Notes:
Bear in mind:
•
The BAT message displayed in the right upper corner of the screen (instead of the
battery 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 can-
not constitute a basis for a conclusion of correctness of the tested resistance values.
5.2

Replacement of accumulators

Replace-
ment of
The MMR-620 meter is equipped with a package of NiMH accumulators and
accumu-
charger. Those accumulators have a series of advantages, such as lack of harmful sub-
lators
stances, no memory effect, higher capacity as compared to NiCd accumulators at the
same size.
The package of accumulators is placed in a compartment. The charger is installed in-
side the meter casing and it may be used solely to charge the original accumulators.
If the test leads are left in the sockets during replacement of the accumulators,
there is 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 leads from the terminals and turn the meter off,
•
Remove the four screws of the accumulators/batteries compartment (in the lower part
of the casing),
•
Remove the package of accumulators and the package connection,
•
Remove the package connection plug,
•
Connect the power supply plug of the new package of accumulators,
•
Place the connection in the bend of the rubber profile,
•
Insert the package in the accumulator compartment,
•
Place and screw the cover of the compartment.
26
5
OPERATING MANUAL MMR-620 Revision 1.6

Power supply

WARNING:
a