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Maintenance and Service 19
Chapter 4 Maintenance and Service
Changing the Battery
When the battery indicator is lit, the battery for backup of program memory and the real-time
clock has become too weak. The battery is replaced as described below. A backup capacitor
saves the memory and keeps the clock running for at least 10 minutes after the power supply
is removed. Thus, if battery replacement takes less than 10 minutes there will be no need to
reload the program, and the clock will continue to run normally.
The replacement battery must be of the type CR2032.
This procedure requires knowledge of proper ESD protection; i.e. an earthed
wristband must be used! How to lift off the cover can be found in chapter Remove
the Cover.
Battery location.
Grip the battery firmly with your fingers and lift it upwards until it rises from its holder.
Press the new battery firmly down into place. Note that to preserve correct polarity, the
battery can only be inserted the “right way round”.