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Kamstrup A/S • 55121351_D2_GB_04.2015
MULTICAL® 302
7 Testing the function
Carry out an operational check when the energy meter has been fully mounted. Open thermo-
regulators and cocks to establish water flow through the heating system. Press the push-button of
MULTICAL® 302, and check that the displayed values for temperatures and water flow are credible
values.
8 Communication
MULTICAL® 302 can be delivered with or without remote communication. If the meter is
delivered with remote communication, it can be either wired M-Bus or wireless M-Bus
(radio communication).
8.1 Wired M-Bus communication
If the meter is supplied with built-in wired M-Bus, M-Bus protocol according to EN 13757-3:2013 is
used.
The connection to the M-Bus master takes place via the fixed 2-wire cable of 1,5 m. The connection
is independent of polarity, and the M-Bus interface is galvanically separated from the rest of the
meter.
M-Bus comes with primary, secondary and enhanced secondary addressing. The M-Bus address
is indicated at the placing of the order, but can subsequently be changed in the Setup mode (see
paragraph 9, page 12).
8.2 Wireless M-Bus communication (radio)
If the meter has integrated wireless M-Bus, it is possible to select between Mode C1 or Mode T1
OMS. Mode C1 is used in connection with Kamstrup's reading systems and in general for drive-by
meter reading. Mode T1 OMS is used in connection with OMS-based stationary networks.
The meter has an internal antenna.
Mode C1
Protocol according to EN 13757-4:2013. Transmission interval 16 secs. Individual 128-bit AES
encryption.
Mode T1 OMS
Protocol according to EN13757-4:2013 and OMS Specification, Volume 2, Issue 3.0.1. Transmission
interval of 900 secs. Individual 128-bit AES encryption.