Xtralis VESDA LCD Programmer Module - Page 29

Xtralis VESDA
®
Xtralis VESDA LCD Programmer Product Guide
www.xtralis.com 23
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
ADM
Scrn
No.
Description
Min.
Access
Level
Parameter Default Minimum Maximum
Delay 3 seconds 0 seconds 10 seconds
Sector Time 10 seconds 8 seconds 15 seconds
Threshold 0.02% obs/m
(0.0062% obs/ft)
Day Threshold 0.02% obs/m
(0.0062% obs/ft)
Night Threshold 0.02% obs/m
(0.0062% obs/ft)