VESDA by Xtralis
VESDA VLF-500 Product Guide
www.xtralis.com
27
5
Detector Overview
5.1
Features
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Laser Based Absolute Smoke Detection
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Wide Sensitivity Range
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Programmable Alarm Thresholds
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Clean Air Barrier for Optics Protection
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Instant Recognition Display
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Instant Fault Finder™
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AutoLearn™ Smoke
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AutoLearn™ Flow
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Ultrasonic Flow Sensing
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Referencing (requires a VESDAnet Interface Card)
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Field Service Access Door
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Separate Event Logging
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Pipe Modeling Support Software – ASPIRE™
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Xtralis VSC software for field support
5.2
Description
The Instant Recognition Display of the VESDA VLF smoke detector shows alarm levels and detector status
information. The Smoke Dial, (see (F) in Figure 6-1 on page 29), a part of the Instant Recognition Display,
provides clear information of a smoke event, relative to the Fire 1 Alarm Threshold. This display also identifies
system and operational faults, when using the Instant Fault Finder function. Each segment of the Smoke Dial
also corresponds to a specific fault condition.
A Field Service Access Door is provided to allow easy access to AutoLearn functions for detector
commissioning. It provides access for filter replacement and connecting a PC for comprehensive
configuration and diagnostics processes.
The detector uses Ultrasonic Flow Sensing to monitor the integrity of the sampling pipe network by detecting
pipe air flow change. Ultrasonic flow sensing is not affected by temperature, humidity or pressure.
Detector history is provided by the non-volatile Event Logging feature. Smoke trend data, flow trend data, fault
events, configuration events and operational events are recorded. Using Xtralis VSC these event types can
be filtered individually.
5.3
Applications
The VESDA VLF can be used for open areas, return air grilles, or for cabinet protection in many small areas
including:
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telecommunication facilities
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computer rooms
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control rooms
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storage facilities
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electrical and switching cabinets
For code-specific information, refer to Codes and Standards Information for Air Sampling Smoke Detection on
page iii.