Panasonic Electric Works Nordic AB
MEW01351
Rev: -
Planning Instructions Fire alarm system EBL512 G3, V1.1.x
89
16
Functions / Services / Features
Some Functions / Services / Features require programming in WinG3,
see chapter "PC software (S/W)", page 15. For more information see
also EBL512 G3 Operating Instructions MEW01163 and WinG3 help.
How to connect the PC and more information, see EBL512 G3
Operating Instructions MEW01163 chapter "Programming (SSD
download)", "New system program (S/W) version download" and
"EBL512 G3 settings download".
16.1
Sensor value
An analog smoke detector is like a "sensor". It detects its environment
at all times. Each detected analog value is, in the detector, converted
to a digital "
sensor value
", which for each individual detector, is
continuously picked up and evaluated by EBL512 G3. In Figure 17
the (digital) sensor values (during a certain time) are represented by
the graph "
Working level
".
16.2
Week average sensor value
Each hour, one sensor value is stored in a special memory (in EBL512
G3) and each week, these stored sensor values are used for a "
week
average sensor value
" calculation.
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This is done for each analog
smoke detector individually. In Figure 17 the (digital) week average
sensor values (during a certain time) are represented by the graph
"
Week average sensor value
" (B).
Each analog smoke detector has a default sensor value = 1 and a week
average sensor value = 1 (i.e. at Time = 0).
A "
fire alarm offset
" (value) is added to the week average sensor
value to get each detector's "
Fire alarm level
", i.e. the fire alarm level
will be adjusted in relation to each new week average sensor value in
order to keep the detector's fire alarm sensitivity constant. The fire
alarm level is in Figure 17 represented by the graph "
Fire alarm level
"
(C) - parallel with the graph "
Week average sensor valu
" (B).
In Figure 17 (at Time = 0):
The week average sensor value (B) is 1 (=0.1 %/m)
Fire alarm offset is 3 %/m, i.e. the fire alarm level (C) is 0.1+3=3.1
%/m.
Service signal will be given when the week average sensor value for a
detector has reached the fixed service signal level (1.8 %/m), i.e. the
detector is "dirty" and has to be replaced. See "
Service level
" (D) in
Figure 17.
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The week average sensor value will be calculated within 2 minutes after
any restart, i.e. also after SSD download. During these "2 min." all analog
smoke detector fire alarms are suppressed.
