Alarm Delay Time - Panasonic EBL128 Planning Instructions

Panasonic Eco Solutions Nordic AB
MEW01622 Rev: -
15.4

Alarm delay time

The alarm delay time will be different for the different type of
detectors depending on the cause of alarm, Area alarm algorithm and
the values before / after the fire alarm threshold level was exceeded.
4452: Normally 9 seconds.
4401:
Area alarm
algorithm
4400:
Area alarm
algorithm
data1 = The average smoke obscuration value (S) for 60 seconds before the alarm
threshold level was passed.
data2 = The sum of the difference between the smoke obscuration value (S) and the
alarm threshold level every second for nine seconds after the counter shows "9".
data2' = The sum of the difference between the 2S+deltaT value and alarm threshold
level every second for nine seconds after the counter shows "9".
NOTE!
Max. alarm delay time is 60 seconds.
If the cause of alarm is T or deltaT the alarm delay time will be 9 seconds.
The alarm delay time function will be cancelled after 18 seconds if one of the
following conditions is true:
S (%/m) > fire threshold level (S) x 2
T (°C) > fire threshold level (T)
deltaT (°C/168 sec.) > fire threshold level (deltaT)
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EBL128 Planning Instructions V2.0.x