Example of setting
”
Leak detection period”
parameter for port No 1 (index ”0”) to 24 hours value:
cfg#leakp 0 24
Value[0] changed from 0 to 24
cfg#
Detection period can be set in range of 1 - 1090 hours, typical setting is 24 hours (daily operational cycle), or 168
hours (weekly operational cycle). Detection period starts running from module restart, or from the moment when
the parameter is changed. Alarm message is sent at the end of detection period.
Example of setting
”
Zero period”
parameter for port No 1 (index ”0”) to 60 minutes value:
cfg#leakz 0 90
Value[0] changed from 0 to 90
cfg#
Zero consumption period can be set in range of 1 - 1090 minutes with precision of ten minutes (rounded to tens of
minutes, e.g. 10, 20, 30...). If the command is entered with any other value (e.g. 36 minutes) the system will store
rounded value anyway (in this case 40 minutes). General principle is that setting of zero period parameter to longer
values means that the detection is more sensitive (it is capable to detect smaller leaks), but it is also less reliable
with higher probability to produce false alarm due to real consumption caused by random changes of operating
cycle (e.g. if somebody was held up at work few hours longer).
Setting of
”
Leak” alarm function parameters appears in the List of configuration parameters (
”
show” command),
in the section of the particular port:
MBUS value[0] DIB : 04 00, VIB : 13 00 ,multiplier 1, divider 1
Leak detection period 24 hour(s), zero period 90 minutes
Structure of alarm message of
”
Leak” type is described in the paragraph
”
Alarm message”.
3.1.8
Description and setting of
”
Burst” alarm function
”
Burst” function is used for detection of such situations in the consumption of gas, water or other liquids, when the
burst consumption caused by broken pipe (or similar fatal failure of distribution system) occurs. If the consumption
of liquid/gas is abnormally huge for some period of time, the module transmits to the superior system alarm message
of ”7” type (
”
Burst”).
”
Burst” function principle is shown in the figure
”
Burst” alarm function is set-up by entering of the
burst
consumption limit
(”burstp[index]” command), that means the limit over which the consumption is considered
as abnormal, and entering of
”
Burst Check Time” period
(”burstt[index]” command) that means the minimum
time period during which the consumption must be permanently over limit to detect the
”
Burst” alarm.
In view of the fact that different meters connected to the module could have different conversion rate of volume per
measuring pulse, consumption limit is delimited universally as
number of registered pulses per 10 minutes
time period
. Conversion table between
”
pulses per 10 minutes” and
”
consumption per minute” for frequently
used conversion rates of watermeters is available in the figure
”
Burst” function can be activated for chosen port by using of
”burstp[index”]
command that defines required
consumption limit in number of pulses per 10 minutes period. By using of
”burstt[index]”
command setup
concurrently for the same port minimum duration of abnormal consumption (
”
Burst Check Time”) in minutes. If
one of these parameters is set to ”0” for some port,
”
Burst” function is deactivated for that port.
Example of setting
”
LIMIT”
parameter for port No 1 (index ”0”) to 15 pulses per 10 minutes:
cfg#burstp 0 15
Value[0] changed from 0 to 15
cfg#
Consumption limit alarm value can be set in practically unlimited range (1 to 65535 pulses per 10 minutes).
Example of setting
”
Burst Check Time”
parameter for port No 1 (index ”0”) to 40 minutes value:
WB169-SI2
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