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LoRaWAN 863-870 PULSE IP68 - Guide utilisateur / User guide V4.0.0
2.4.7
Leaks detection
The product allows leak detection on each count input as shown in the following diagram:
The flow rate corresponds to the number of pulses of the flow calculation period divided by the same
period. It is expressed in pulses / hour.
The leak detection is performed by analyzing a number of occurrences (configurable by register: S330
and S331) where the calculated flow rate is less than a leakage threshold (configurable by register:
S328 and S329).
The associated leak alarm is stored and transmitted with the next daily frame.
The alarm is automatically deactivated after the daily frame is sent.
The settings associated with this mode of operation are:
•
Enabling and Configuring inputs (register 320)
• Anti-bounce timer period (register S322)
• Flow calculation period (register S325)
• Leak thresholds (registers S328 and S329)
•
Null flow period counters (S330 and S331)
Product in
standby
Flow calcu-
lation period
reached ?
Yes
No
Period
of 24h
reached
?
Yes
No
Calculation of flow
Incrementing the
zero-flow period
counter
Send frame 0x30
Yes
Yes
No
No
Leak alarm ac-
tivated in frame
0x30
Pulse de-
tected and
validated
Yes
Counting
pulse
Value
of the counter
of zero flow period
<(counter
leakage)
Value <
(leakage
threshold)
No