Autolearn Smoke - VESDA -E VES-A00-P Product Manual

VESDA-E VES-A00-P Product Guide
Example 2:
Set the lowest alert threshold to no higher than lowest Fire 1/ #pipes in use.
E.g.:
Or
Check the lowest alert threshold is as recommended after executing AutoLearn or changing the
number of pipes in use or returning the detector to factory default configuration.
6.1

AutoLearn Smoke

AutoLearn Smoke is initiated by using Xtralis VSC or the AutoConfig button located on the main board of the
detector.
During the AutoLearn Smoke process, the detector determines the average smoke and peak smoke
obscuration levels and sets suitable alarm thresholds for the operating environment. This process will
minimize nuisance alarms due to normal environmental background variations.
During the learning cycle, if an alarm condition occurs, AutoLearn will not complete its cycle. In this situation
the user must restart the AutoLearn process. If AutoLearn is halted, the alarm thresholds will be left at the
previous settings.
Conditions experienced during learning are assumed to be representative of normal operating conditions.
The AutoLearn Smoke learning times can be set between 15 minutes and 16 days, with the default being set
to 14 days.
If AutoLearn is running during the changeover period from Day to Night Thresholds, make sure that AutoLearn
runs for at least an hour in both the Day and Night periods.
Alarm Level
Alert
Action (Pre-Alarm) 0.005% – 2.0% obs/m (0.0016% - 0.625% obs/ft)
Fire1 (Alarm)
Fire2
For code-specific information, see Codes and Standards Information for Air Sampling Smoke Detection on
page iii.
76
0.08
%/ft = 0.04 %/ft
2
Fire 1
Pipe 1 0.3 %/m (0.1%/ft)
Pipe 2 0.25%/m (0.08%/ft)
Pipe 3 0.4%/m (0.12%/ft)
Pipe 4 0.2%/m (0.06%/ft)
0.2
%/m = 0.05 %/m
4
0.06
%/ft = 0.015 %/ft
4
Table 6-1: AutoLearn Smoke range
AutoLearn Smoke Range
0.005% – 2.0% obs/m (0.0016% - 0.625% obs/ft)
0.010 % – 2.0% obs/m (0.0031% - 0.625% obs/ft)
0.020 % – 20.0% obs/m (0.0063% - 6.25% obs/ft)
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