Xtralis VESDA
®
Xtralis VESDA LCD Programmer Product Guide
www.xtralis.com 31
87. Smoke Thresholds - This screen lists the available options for setting smoke
thresholds.
•Fire
• Pre-Alarm
•Alert
• Overlay Alert
ADM
88. Alarm Delays - In this screen insert the required time delay (in seconds) before an
alarm is generated at Fire, Pre-Alarm, Alert, Overlay Alert levels. This screen also
offers the option of simultaneous or cumulative delay times before the alarm is
generated. The instant fire alarm option can be enabled or disabled in this screen.
ADM
89. Smoke Change - The change in obscuration rate mentioned here will register the
event in the event log. This is subject to the change occurring over the interval
period that is input. You can input the required obscuration and interval.
• Change By
• Min. Interval
ADM
DST
Scrn
No.
Description
Min.
Access
Level
Parameter Default Minimum Maximum
Fire 1/Fire
0.200% obs/m 0.015% obs/m 2.000% obs/m
(0.0625% obs/ft) (0.0046% obs/ft) (0.6250% obs/ft)
Action/Pre/
Alarm
0.140% obs/m 0.010% obs/m 1.995% obs/m
(0.044% obs/ft) (0.0031 obs/ft) (0.6234% obs/ft
Alert
0.080% obs/m 0.005% obs/m 1.990% obs/m
(0.025% obs/ft) (0.0015% obs/ft) (0.6218% obs/ft)
Parameter Default Minimum Maximum
Fire 1/Fire 10 seconds 0 seconds 60 seconds
Action/Pre/Alarm 10 seconds 0 seconds 60 seconds
Alert 10 seconds 0 seconds 60 seconds
Delay Times Simultaneous Simultaneous Cumulative
Instantaneous Fire Disabled Enabled Disabled
Parameter Default Minimum Maximum
Change By
0.02% obs/m 0.005% obs/m 0.2% obs/m
(0.0062% obs/ft) (0.0015% obs/ft) (0.0625% obs/ft)
Min. Interval 2 seconds 2 seconds 10 seconds
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