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)
