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Panasonic Electric Works Nordic AB
MEW01351
14400
Σ |
|
X
-X
m
wa
m=0
Pf
--------------------------- =
14400
X
= momentary sensor values
m
for 24 hours.
X
= weak average sensor value
wa
14400 = pollings during 24 hours
16.6
Rev: -
Planning Instructions Fire alarm system EBL512 G3, V1.1.x
and max. sensor values. All three values should be studied together.
(E.g. one or two high sensor values will not result in a high
performance factor.) The performance factor is calculated for each
detector individually.
Each sensor value is compared with the week average sensor value.
The absolute difference is saved and each twenty-four hour (at
midnight) is an "average value" calculated, i.e. the performance factor.
If the detector is mounted in a very "stable" environment, the
performance factor will be low (min. 0 %/m).
If the detector is mounted in a very "unstable" environment, the
performance factor will be high (max. 2.55 %/m).
An "unstable" environment can cause nuisance alarms (unnecessary
alarms). Perhaps should another type of detector or alarm algorithm
be used or other functions, e.g. alert annunciation or two-address
dependence.
Algorithms for analog heat detectors
The detectors conforms to a class (see EN54-5:2000, clause 4.2)
according to the requirements of the tests specified in EN54-5:2000,
clause 5.
Each analog heat detector can have two alarm algorithms programmed
(via WinG3). One Regular alarm algorithm that is normally used
and one Alternative alarm algorithm that is turned on/off via a time
channel (internal or external). E.g. class A1 can be used during night-
time and class B can be used during daytime (the alternative alarm
algorithm is used to reduce nuisance alarms during working hours).
The actual algorithm can be read in menu H4/U4.
When the c.i.e. has picked up a sensor value above the fire alarm
level (xx° C) for a detector, the next two values from the same
detector also have to be above the fire alarm level to activate fire
alarm in the c.i.e. (This results in an approx. 5 seconds alarm delay).
The same is valid for pre-warning except it is a lower level (xx° C)
than for fire alarm. (If pre-warning shall be generated or not, is
selected in WinG3 – System Properties).
The same is valid for heavy heat alarm except it is a higher level than
for fire alarm.
The fire alarm, pre-warning and heavy heat alarm levels can, for the
whole system, be set in WinG3, see chapter "Alarm algorithms", page
136.
See EBL512 G3 Operating Instructions MEW01163 for more
information.
96
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