TECHNICAL DESCRIPTION flowIQ® 3100
28 Kamstrup A/S • Technical Description • 5512-1242_B1_GB • 05.2015
8.7.6 Flow arrows
The flow arrows in the left side of the display indicate whether water flows through the meter (in the right
direction). If there is no flow (or backwards flow), all arrows are OFF. If there is flow through the meter, the
following sequence runs with a timing of 0.5 seconds per reading.
8.8 Wireless M-Bus
The meter has a built-in radio transmitter for Wireless M-Bus Mode C1 or T1 OMS.
Consequently it is one way transmission. The meter does not include a radio receiver and cannot be
contacted via radio.
8.8.1 Transmission
Data packets are sent at intervals of approx. 16 or 96 seconds via the built-in antenna.
Every eights packet is a ‘full string’, whereas the 7 intervening packets are ‘compact strings’.
The time between transmissions depends on whether the meter is configured to 'Drive-by' or 'Fixed
network' – this selection is determined when ordering the meter, or it can be configured later by means of
METERTOOL.
Please note:
The contents of the data packet is updated every time a ‘full string’ is sent and the first time a
compact string is sent after a full string.
A ‘full string’ includes extra information on how the meter data are to be interpreted. Once a single ‘full
string’ has been received, the remaining meter population of identically configured meters can be read by
a ‘compact string’.
When sending data packet each 16.sekund is the data packet short and compressed to achieve a long
battery life.
By 96 second intervals, a long and intelligent radio package with built-in 'repair coding' is sent. At the same
time the power of the signal is higher and therefore optimized for use in fixed networks. With the
increased interval between the transmissions, the same high battery life is guaranteed.
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