Performance Factor; Analog Heat Detectors - Panasonic EBL128 Planning Instructions

Panasonic Electric Works Nordic AB
MEW01090
13.1.8
25412
Σ |
|
X -X
m wa
m=0
Pf
--------------------------- =
25412
X = momentary sensor values
m
for 24 hours.
X = weak average sensor value
wa
13.2
The following is valid for the analog heat detector types 330x in NORMAL
Rev: 3
6. The decision value has reached the original fire alarm level "40".
This happens approx. 90 minutes after the fire alarm has been
activated by the smouldering algorithm!!

Performance factor

To find out the environment conditions where an analog smoke
detector 430x is mounted, the Performance factor (Pf) can be studied
via menu H4/U3 or via Win128.
The performance factor is calculated for each detector individually.
Each momentary sensor value is compared with the week average
sensor value. The absolute difference is saved and each twenty-four
hour (at midnight) an "average value" is calculated, i.e. the
performance factor. (25412 = samples per 24 hours.)
If the detector is mounted in a very "stable" environment (like an
office) the performance factor will be low, i.e. min. 0 %/m.
If the detector is mounted in a very "unstable" environment (like in a
factory) the performance factor might be high, i.e. max. 2.55 %/m.
An "unstable" environment where the sensor values vary a lot can
cause nuisance alarms (unnecessary alarms). Perhaps should another
type of detector be used, another alarm algorithm
taken, e.g. alert annunciation or two-unit-dependence (co-incidence
alarm).
The performance factor is shown in menu H4/U3 or via Win128
together with the min. and max. sensor values. These values should
be studied together. (E.g. one or two high sensor values will not result
in a high performance factor, like many high sensor values will.)

Analog heat detectors

mode.
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 Win128).
One alarm algorithm that is normally used (default) and one
alternative alarm algorithm turned on / off by 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
can be used to reduce nuisance alarms during working hours. The
actual algorithm is shown in menu H4/U3.
When EBL128 has picked up a sensor value above the fire alarm
level for a detector, the next two values from the same detector also
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E.g. an alternative alarm algorithm during working hours.
EBL128 Planning Instructions V1.1.x
87
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or other actions be