Xtralis VESDA LCD Programmer Module Product Manual page 29

Xtralis VESDA
®
Scrn
Description
No.
55. Delays & Thresholds - This screen displays the delays and thresholds for the
VLS.
- Delays - The time before a VLS will commence scanning, once the lowest
threshold is reached.
- Sector Time - The time spent looking at each sector after the initial fast
scan sequence. This allows air sample from a previous pipe to clear out
from the detector before it starts reading the air sample from the next pipe.
- Thresholds - The smoke threshold for the VLS
- Day Threshold - The day smoke threshold for the VLS
- Night Threshold - The night smoke threshold for the VLS
Parameter
Delay
Sector Time
Threshold
Day Threshold
Night Threshold
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Xtralis VESDA LCD Programmer Product Guide
Default Minimum
3 seconds 0 seconds
10 seconds 8 seconds
0.02% obs/m
(0.0062% obs/ft)
0.02% obs/m
(0.0062% obs/ft)
0.02% obs/m
(0.0062% obs/ft)
Min.
Access
Level
ADM
Maximum
10 seconds
15 seconds
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