LaserFOCUS VLF-500 Product Guide VESDA
®
48
1.12 Glossary
A Aspirator Impeller type fan used to draw sampled air into the
detector.
C Capillary Tubes Flexible tubes attached to the sampling pipe network for
sampling specific areas or objects away from the
sampling pipe.
D Disable Disables the fire relay outputs from actuating
(previously known as Isolate) and indicates a fault.
Dual Stage Air Filter
Cartridge
A disposable air filter cartridge used in VESDA
LaserFOCUS detectors that removes dust
contamination from sampled air and provides a clean air
bleed to maintain the Laser chamber optics.
E Event Log All VESDA detectors provide internal data logging of
events which have occurred in the VESDA protected
zone.
F FCC Compliance Federal Communications Commission.
Fire 1 This indicates a serious situation and may lead to
automatic generation of a normal fire alarm.
Fire Alarm Control
Panel (FACP)
A panel which all fire detection products report their
status to.
G General Purpose Input
(GPI)
The General Purpose Input is a programmable input.
H High Airflow
Environment
Where there are 10 or more air exchanges per hour.
I Instant Fault Finder Illuminates one or more segments of the Smoke Dial
with corresponding fault numbers.
L LaserFOCUS An air sampling smoke detector using light scattering to
report smoke obscuration.
O Obscuration The reduction in light passing through a uniform length
due to the presence of particulates.
R Relay The connection on a VESDA detector which allows
external equipment to be hard wired to it and be
triggered when various conditions occur (example,
sounding a siren at Alert threshold).
S Sampling Network The pipe network constructed to allow the VESDA
detector to draw air for sampling.
Sensitivity Relative degree of response (i.e. activation of alarm
condition) of a detector. A high sensitivity denotes
response to a lower concentration of smoke than a low
sensitivity, under identical smoke build-up conditions.
V VESDA Brand name for the range of smoke detectors.
VSC VESDA System Configurator, a PC based program tool.
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