Instruction
SONOMETER™ 1100
DEN-SMT/PL
VI.SH.K1.02
Danfoss District Enrgy
4
5.0 Power supply
Sonometer
TM
1100 can be powered from lithium battery (11 or 16
years lifetime) or 230V AC / 24V AC mains unit supply.
Battery
3.6 V DC lithium battery is fitted in the standard version. The battery is
not to be charged, replaced or short-circuited. Ambient temperatures
below 35°C ensure the typical life of the battery.
Mains unit
24 VAC or 230 VAC power supply units can be changed to or retrofitted
at any time. The cable is to be fuse at max. 6 A and protected against
manipulation. Connect the cable according the labelling of the termi-
nal. The power supply unit notifies the meter if mains voltage is present.
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.
Caution
Used batteries must be disposed of at suitable waste collection
points.
Risk of explosion if battery is replaced by an incorrect type.
Caution
It is strictly necessary to have protective safety cover installed
at all times.
Under no circumstances connect between the two phases
otherwise the power supply unit will be destroyed.
Installation of
temperature sensors,
continued
District heating/
boiler application
Installation of temperature sensors in 3 types of applications (energy meter in outlet):
Combined heating/
cooling application
Chilled water application
T
H
T
C
T
C
T
H
Heat meter
Heat meter with cooling tariff
Cooling meter
