VESDA by Xtralis
VESDA VLF-500 Product Guide
www.xtralis.com
53
11 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.
E
Event Log
All VESDA detectors provide internal data logging of events
which have occurred in the 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.
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.
VESDA VLF
An air sampling smoke detector using light scattering to
report smoke obscuration.
Xtralis VSC
A PC based program tool.
