MULTICAL® 21 & flowIQ® 2101 /..02 /..03 TECHNICAL DESCRIPTION
Kamstrup A/S •Technical Description • 5512-897_J1_GB • 06.2016 65
15 Data communication
The meter has built-in radio for Wireless M-Bus Mode C1 or T1 OMS (one-way data transmission from
meter, no data receipt in meter).
15.1 Transmission
Data packages are sent at intervals of approx. 16 or 96 seconds. Every eights package is a full data string,
whereas the seven intervening packages are compact data strings.
The nominal transmission power is 10Mw in drive-by mode and 25 Mw in fixed network mode.
Note! The content of the data package is updated at every transmission.
15.2 RADIO OFF
Radio transmission interrupts if ‘RADIO OFF’ displays.
RADIO OFF activates at the end of the production process at Kamstrup. The meter removes RADIO OFF
automatically, when the volume register has counted water consumption for approx. 5 seconds.
RADIO OFF is intended for situations where radio transmission is inappropriate – e.g. in laboratories, in
warehouses and during air transport, where many meters will typically be concentrated in one place.
It is not possible to stop the radio transmission of a meter in normal operation permanently, but the meter
can be turned OFF by means of the optical eye e.g. in advance of air transport. However, the radio will
automatically turn ON again, as soon as a water flow is registered.
RADIO OFF secures that the meter does not send radio communication until the meter is set into operation
for the first time.
15.3 Data Content
The data content of the data transmission partly depends on the configuration.
See document 5512-1700 – Technical Description for Wireless M-Bus.
15.4 Encryption
The water meter can be ordered without or with encryption
*)
of data transmission. If encryption of data is
selected, it consists of 128 bit AES counter mode encryption. Kamstrup A/S recommends encryption.
*)
Meters produced for Russia will always be WITHOUT encryption.
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