User's Manual

RTM Elster AMCO applicative PFS Coronis Systems
5.7.Leak detection management
(Refer to DR[3] Section 1.0.23; DR[4,5] Section 1.0.20)
5.7.1.Residual leak detection
Residual leak is detected when the module measures a consumption-rate (by default calculated every hour)
systematically higher than that set by the user (parameter residual leak threshold) for a given detection period
(parameter residual leak detection period).
 Residual leak threshold : Detection threshold, expressed in number of pulses per sample period
(pulse register) or absolute volume per sample period (encoder) . It is necessary to link this value
with the right pulse value or encoder unit.
 Residual leak detection period : minimum time during which the threshold value must be
exceeded before leak detection is detected (expressed in multiple of sample period).
The parameters relative to this detection, has to be configured before activating the detection.
Residual leak detection is activated by setting bit 5 in 'Operating Mode' parameter.
➢ Example : The measurement step is set to measure the consumption-rate in gallons/hour and the
residual leakage detection parameter is then set as follows:
 Residual leak threshold : 5 gallons per hour
the value of the parameter depends of the pulse value or on encoder unit
 Residual leak detection period : 4 days.
ATTENTION : it is advised to configure the detection period value to several days (or a week) in
order to avoid alarms when opening a tap.
EVO RTM-UserMan 48
Days
consumption-rate in
gallons/hour
10
Leakage threshold
Detection period: 4 days
Passage above
threshold value
Residual leak
detection