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15. Backup battery replacement
The instrument is fitted with a backup battery that ensures the correct functioning of the clock
even in case of mains power failure.
The battery operates only when the instrument is not powered by the mains.
There is no control on the battery’s charge status, therefore it should be replaced at
least every four years.
It is a coin BR2032 3V Lithium battery. The battery housing is located on the back of the
display card.
Before replacing the battery, turn off the instrument disconnecting the power cable.
Instrument internal view
Procedure
1.
Separate the instrument from the mounting plate (please see the chapter “
Installation and
connection
”).
2.
Unscrew the 6 screws on the back.
3.
Lift the front from the back making sure the flat cables that connect the various instrument
parts are not disconnected.
4.
Extract the flat battery from its housing.
5.
Put the new battery in,
making sure the polarity is correct
:
the negative pole is
turned downwards
.
6.
Close the instrument back using the 6 screws.
7.
Refit the instrument on the mounting plate.
Summary of Contents for HD2817T Series
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