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Kamstrup A/S • 5512603_C1_GB_03.2016
MULTICAL® 801
5 Power supply
MULTICAL® 801 is power supplied by 24 VAC or 230 VAC.
5.1
Backup battery
MULTICAL® 801 includes a backup battery, which ensures that all relevant
measurements continue during power failure.
The battery ought to be replaced after 10 years’ normal operation, or after 1
year without mains connection.
The type number of the backup battery is 66-99-619.
The voltage of a lithium battery is almost constant throughout the whole
lifetime of the battery (approx. 3.65 V). Therefore, it is not possible to
determine the remaining capacity by measuring the voltage.
The battery cannot and must not be charged and must not be short-
circuited. Used batteries must be handed in for approved destruction, e.g. at
Kamstrup.
6 Operational check
Carry out an operational check when the energy meter has been fully
mounted. Open thermo-regulators and cocks in order to establish a water
flow through the heating system. Activate the upper push button on the
MULTICAL® 801 and check that the display values for temperature and water
flow are reliable.
