Power Supply; Battery; Power Supply Unit - Diehl Metering SHARKY 775 Instructions D'installation

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4.

Power supply

4.1 Battery

A 3.6 VDC lithium battery is fitted in the standard version.
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The battery is not to be charged or short-circuited.
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Ambient temperatures below 35 °C have a positive effect on battery
lifetime.
Used batteries must be disposed of at suitable waste collection
points. Caution: Risk of explosion if battery is replaced by an
incorrect type.

4.2 Power supply unit

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24 VAC or 230 VAC power supply units can be changed to or retrofit-
ted at any time.
It is strictly necessary to have protective safety cover installed at
all times.
Under no circumstances connect between the two phases other-
wise the power supply unit will be destroyed.
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The cable is to be fused at max. 6 A and protected against manipulation.
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The power supply unit notifies the meter if mains voltage is present.
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If the power supply fails, the backup battery (CR2032) provides the
power supply for up to 1 year. The LCD readings (on pressing button)
and the date and time are still updated, but none of the measuring
functions work, incl. the flow rate measurement. Communication still
functions over the optional M-Bus, RS485 and RS232 modules or the
optical interface, but reduces the life of the backup battery. The radio
function is switched off in the event of power supply failure.
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