11
10. Readout Data logger
The EDC modules have an internal memory (data
logger). The readout of the data which are not
already transmitted in the above data telegrams is
carried out by means of the optical head and related
software.
Datalogger
EDC wM-Bus
EDC LoRaWAN
TM
Annual due date
values
max. 16
2
Monthly values
18
plus 18 half-
monthly values
18
plus 18 half-
monthly values
Daily values
96
32
Quarter-hour values
96
--
11. Smart Metering functions
Self-monitoring
The module has an integrated battery status moni-
toring.
Tampering detection
It will be detected as soon as the scanning coils of
the EDC module are affected by a magnet. In the
event memory date and time of the event will be
memorized.
Dismounting of module and meter detection
The detection is possible at all meters with grey
register cap. A hall sensor detects here as soon as the
EDC module was dismounted from the register. The
event memory stores the date and time of the event.
Leakage detection
If over a period of 24 h (96 quarter hour values) the
flow value is never zero, than this indicates a leak.
The EDC module sets corresponding bits.
If the flow rate remains zero during one quarter of an
hour (before reaching 96 quarters of an hour with no
flow) the algorithm restarts.
If 96 quarters of an hour were running with flow,
leakage remains set until during 8 quarters of an
hour in a row the flow remains zero. The event
memory stores the date and time of the event.
Meter Stop detection (blockade)
If no meter progress will be detected by the EDC
module over a period of 4 weeks, meter stop
(blockade) is detected. The blockade deemed to be
revoked if a meter reading difference of > 10 liters
occurs in a quarter of an hour.
Meter oversized detection
Meter is oversized when the flow rate never exceed
0,1*Q
3
(10% of Q
3
). This is averaged over a 15-minute
period. It is counted how many times the flow rate
of 10% of Q
3
is not achieved. If the flow rate is not
reached after 30 days “meter oversized” is detected.
If once a flow rate of > 10% from Q
3
, averaged, is
reached by a quarter of an hour, the detection is per-
manently disabled and the status "meter oversized"
deleted. The event memory stores the date and time
of the event.
Meter undersized detection
If the flow rate is continuously higher as Q
3
(perma-
nent flow) over a 6-hour period, this indicates an
undersizing of the meter and the message “meter
undersized” will be detected. This is averaged over a
15-minute period. The event memory stores the date
and time of the event.
Pipe burst detection
For EDC modules with M-Bus and Pulse: “Pipe burst”
is detected when the flow rate has exceeded a given
value (> 30% of Q
3
) during a 30-minute period. This
is averaged over a 15-minute period.
The event memory stores the date and time of the
event.
Reverse water flow detection (wrong assembly)
If after installing, the EDC module detects that the
meter is running backwards each ¼ hour for 12
hours , reverse water flow is detected (wrong
assembly). If the meter runs forward for 4 hours,
the message shall be considered as finished.
