Alarm Algorithm / Alternative Alarm Algorithm - Panasonic EBL128 Planning Instructions

Panasonic Eco Solutions Nordic AB
MEW01622 Rev: -
13.4.1
3. heavy smoke alarm will be activated at a higher level (bigger
offset) than for fire alarm, i.e. heavy smoke alarm will be
activated later than the fire alarm from the same alarm point.
The pre-warning offset and the heavy smoke alarm level can, for the
whole system, be set in EBLWin, see chapter "Alarm algorithms",
page 144.
The fire alarm offset can, for the whole system, be set in EBLWin, see
chapter "Alarm algorithms", page 144. NOTE! This is not a normal
action and a special password is required.
"Pre-warning", "Fire Alarm" and "Heavy Smoke Alarm" can activate
programmable outputs respectively, see chapter "Control expression",
page 78. See also EBL128 Operating Instructions MEW01623.

Alarm algorithm / Alternative alarm algorithm

In order to reduce the nuisance alarms
alarms will be activated, six different alarm algorithms are available.
See Figure 18., page 96. They are based on:

Normal (N), High (H) or Low (L) sensitivity

Normal (15 sec.) or slow (35 sec.) detection time
Normal sensitivity (Default) Fire alarm offset is 3.0 % smoke
obscuration per meter.
High sensitivity Fire alarm offset is 2.4 % smoke obscuration per
meter, i.e. less than for normal sensitivity. Can be used when an
"early" fire alarm is wanted.
Low sensitivity Fire alarm offset is 3.6 % smoke obscuration per
meter, i.e. more than for normal sensitivity. Can be used to reduce
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nuisance alarms .
Normal detection time - 15 sec. (Default) There will always be min.
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15 seconds alarm delay
alarms.
Slow detection time - 35 sec.. There will always be min. 35 seconds
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alarm delay . This is an "extra filter" to reduce nuisance alarms
Each analog smoke detector can have two alarm algorithms
programmed (via EBLWin). One Regular alarm algorithm that is
normally used (N-15 is default) and one Alternative alarm
algorithm that is turned on/off via a time channel (internal or
external). E.g. normal sensitivity can be used during night-time and
low sensitivity during daytime (i.e. the alternative alarm algorithm is
used to reduce nuisance alarms
The alarm algorithm in use can be read in menu H4/U3.
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So called false / unnecessary alarms.
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After the fire alarm level is reached / passed, it will take min. 15 alt. 35
seconds until fire alarm will be activated in the c.i.e.
EBL128 Planning Instructions V2.0.x
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and ensure that the real fire
. This is a "normal filter" to reduce nuisance
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during working hours).
93
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.