Multi 9420 Maintenance, cleaning, disposal
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12 Maintenance, cleaning, disposal
12.1 Maintenance
12.1.1 General maintenance activities
The only maintenance activity required is exchanging the battery that buffers
the system clock.
12.1.2 Exchanging the battery
The Multi 9420 has a battery (CR2032 type) to buffer the system clock in case
of a power failure.
See the relevant operating manuals of the IDS sensors for instruc-
tions on maintenance.
To retain the current setting of the date and time during the battery
exchange, supply the meter with power with the power pack while
changing the battery.
To avoid that the system clock is reset in the case of a power failure,
we recommend changing the battery before the end of its service
life (the battery included in the scope of delivery after approx. 8
years).
1. Unscrew the screws (2) of the lid of the battery compartment with a
screwdriver.
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