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Displaying IDNet & Mapnet Device Status, Continued
TrueAlarm Sensor
Display Values
(continued)
Note: Sensitivity displayed is in % obscuration per foot. Use Table 9-1 to convert to
% obscuration per metre.
Table 9-1. Smoke Obscuration conversion chart.
%Obs/Ft
0.2%
0.5%
1.0%
1.5%
The Average Value is the average of the last 2048 samples received from the sensor. The
Alarm Level is the binary value that is used to determine alarm conditions. This value will
change over time as the panel compensates for environmental conditions. The alarm value
will be different for each of the seven sensitivity levels.
The Value is the most recent value received from the sensor. It is shown as the binary value,
as % of alarm level (max 100%), and as a smoke level in %/ft.
The Peak is displayed as a binary value, a % of alarm and a % smoke obscuration per foot.
Through the use of a system pseudo point all new peak values per sensor can be stored in the
history fault log and printed on the optional 4100ES system printer. Printing of peak values is
done at the time the peak value is received at the FIP. This peak value is helpful in
determining if a sensor should be made more or less sensitive.
%Obs/m
%Obs/Ft
0.6%
1.6%
3.3%
5.0%
9-13
%Obs/m
2.0%
6.5%
2.5%
8.2%
3.0%
9.8%
3.7%
12.1%
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