MRU-120
– USER MANUAL
34
6.3 Fuse replacement
Remove the battery compartment to get access to two replaceable fuses:
- FST 1 A 250 VAC, 5x20 mm and
- 2 A 250 VAC, time-delay fuse, 5x20 mm.
If the instrument or battery charger does not work, before sending it for servicing, check the fuses
and, if they are blown, replace them with identical ones. The fuses are placed in holders, near the
centre of the cavity. To remove the fuses, use a narrow tool (e.g. a screwdriver).
6.4 Charging of accumulators
Charging commences once the power supply has been connected to the meter regardless of the
fact whether the meter is on or off. During charging the screen looks as it is presented in the follow-
ing illustration. The accumulators are charged in accordance with the algorithm of „quick charge” –
this process permits to reduce the duration of charging to approximately four hours. The end of the
process of charging is signalled by:
Charge in progress
. In order to turn the device off, remove the
power supply plug of the charger.
Operating mode
Messages regarding the process of
charging
Charging Progress, the changing interior symbolizes
charging.
Note:
- As a result of interferences in the network it is possible that the process of charging of accumulators
will finish too fast. In the case too short a time of charging is detected it is necessary to remove the
plug of the charger and start charging anew.
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