Panasonic EBL128 - Learning Function; Learning Period; Area Alarm Algorithms

Panasonic Eco Solutions Nordic AB
MEW01622 Rev: - EBL128 Planning Instructions V2.0.x
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15.5 Learning function / Learning period
Detectors 4400 and 4401 can use a Learning function, i.e. Depending
on the local temperature changes and the local occurrence of smoke
where the detector is situated, each detector can after a learning
period adapt a more appropriate alarm algorithm than the default
(Normal) one, an Area Alarm algorithm.
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See also page 124.
15.5.1 Area Alarm algorithms
Normal area is the default Area alarm algorithm for each detector.
There are four other Area alarm algorithms that can be adapted after
the learning period:
 Smoke – Steam area, is depending on occurrence of smoke, i.e.
level 1 = S [%/m] > half the fire alarm threshold level (S).
 Heater area, is depending on rise of temperature, i.e. level 2 =
deltaT [°C/168 sec.] > 12 (approx. 4.3°C/min.).
 Cooking – Welding area, is depending on occurrence of smoke
together with rise of temperature, i.e. level 3 = 2S+deltaT >
10. NOTE! S has to be > 2.5 and deltaT has to be > 3.
 Clean area, is the most sensitive condition, requiring a very
clean and stable environment, i.e. the values for all the other
types of areas (level 1, 2 and 3) must not be exceeded.
15.5.1.1 Smoke – Steam area, level 1
36h
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A learning period contains twenty 36h-periods (i.e. 20 x 36h = 720h
= 30 days = one month).
During each 36h-period it is recorded if level 1 is exceeded at least
one time. If so, the 36h-period will get a check-mark, see example.
When three (or more) of the 36h-periods during the learning period
have a check-mark, the Smoke - Steam area Alarm algorithm will be
adapted (i.e. as earliest after 3 x 36h = 108h = 4½ days). In the
example this will happen in the 36h-period no. 10 (i.e. after 10 x 36h
= 360h = 15 days).
After the 36h period no. 20, a new learning period starts. The
check-marks are inherited from the previous learning period.
Depending on if level 1 is exceeded or not during each 36h period,
the check-marks will remain or be removed.
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Via EBLWin is set if an Area Alarm algorithm shall be automatically
adapted via the Learning function or manually set via EBLWin. If manually
set, also an alternative Area Alarm algorithm can be set that can be controlled
via a time channel.