Brooks Firetracker FT128 CIE - Heating Area, Level 2; Cooking - Welding Area, Level 3; Clean Area, Level 1, 2 & 3; Learning Function Summary

Technical / Programming Manual
FT128 Rev 2.2
132
16.5.1.2 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.
16.5.1.3 Cooking – Welding Area, level 3
The learning function is the same as for the Smoke - Steam area Alarm algorithm but level
3 is used instead of level 1.
16.5.1.4 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.
16.5.1.5 Learning Function Summary
A detector can adapt the following area Alarm algorithms, depending on if and when level
1, level 2 and level 3 are exceeded or not:
The following is valid for the different type of detectors:
 4452: This detector uses not 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.
16.6 Analogue Data Output
The smoke obscuration value (%/m) and the temperature (°C) can be shown via FT128. 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.
16.7 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:
1. During 13 minutes, all the momentary smoke obscuration values are saved and an
average value is calculated. The CCF will be changed directly if the average value
is lower than the actual CCF, else no change.
2. This is valid for 18 hours. Then the CCF will be changed also if the average value
is higher than the actual CCF. (It will normally be higher because of contamination.)