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periods get a check-mark, the Smoke - Steam area Alarm algorithm will be adapted again
as long as three or more of the 36h-periods during the learning period have a check-mark.)
19.5.1.2
Heating area, level 2
The learning function is the same as for the Smoke - Steam area Alarm algorithm but level
2 is used instead of level 1.
Cooking – Welding Area, level 3
19.5.1.3
The learning function is the same as for the Smoke - Steam area Alarm algorithm but level
3 is used instead of level 1.
19.5.1.4
Clean Area, level 1, 2 & 3
For this area Alarm algorithm to be adapted there, must be no check-mark for level 1, level
2 and level 3 respectively during the learning period, i.e. no check-mark whatsoever.
The Clean area Alarm algorithm will be changed back to the Normal area Alarm algorithm
directly if any 36h period for level 1, level 2 and level 3 respectively gets a check-mark,
i.e. any check-mark whatsoever.
19.5.1.5
Learning function summary
A detector can adapt the following
level 1, level 2 and level 3 are exceeded or not:
The following is valid for the different type of detectors:
4452: This detector does not use the Learning function.
4400: This detector uses the Learning function (in Advanced mode), i.e. the area
Alarm algorithms Normal, Smoke – Steam, Clean, Heater and Cooking -
Welding can be adapted.
4401: This detector uses the Learning function (in Advanced mode), i.e. the area
Alarm algorithms Normal, Smoke – Steam and Clean can be adapted.
19.6
Analogue data output
The smoke obscuration value (%/m) and the temperature (°C) can be shown via
FT1020G3. A new value is calculated every second (the smoke obscuration value is an
average value for the last four seconds.)
The following is valid for the different type of detectors:
4452: This detector has no analogue output.
4400: This detector has a smoke obscuration value output, a temperature value
output, actual area alarm algorithm output and a CCF (see below) output to the
CIE.
4401: This detector has a smoke obscuration value output, actual area alarm
algorithm output and a CCF (see below) output to the CIE.
19.7
Sensitivity compensation
In order to maintain a constant sensitivity regardless of the contamination of the detector,
a Contamination Compensation Factor (CCF) is subtracted from the momentary smoke
obscuration values before evaluated in the alarm algorithms etc. The Contamination
Compensation Factor (CCF) is calculated during a 36 hours period as follows:
Technical/Programming Manual
area Alarm algorithms
136
FT1020G3 Rev 2.2.1
, depending on if and when
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