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Standard Features
Compatible with Elite and Elite RS control panels
5 operating modes
Drift compensation
Address is set by X-Pert card and is stored in base
User memory
Alarm flag for fast alarm reporting
Conventional false safe mode
Polarity insensitive
Fits 4” & 6” low profile base
6” audible base
4” wire relay base
Note:
Bases and cards are not included with Sensors, please order separately.
Overview
The VF5600 Discovery Ionization Smoke Sensor has a molded white polycarbonate case with windresistant smoke inlets. Inside the case is a printed circuit board which
has the ionization chamber mounted on
one side and the signal processing and communications electronics on the other. The ionization chamber consists of a reference chamber contained inside a smoke chamber. The outer smoke chamber has inlet apertures fitted with insect resistant mesh.
Operation
The radioactive source holder and the smoke chamber form positive and negative electrodes respectively. An Americium 241 radioactive source mounted within the reference chamber irradiates the air in both chambers, producing positive and negative ions.
A voltage across the electrodes produces
an electric field. Ions are attracted to the Electrode of the opposite sign to their own charge; many recombine but a small electric current flows between the electrodes. At the junction between reference and smoke chambers, the sensing electrode converts variations in chamber current into voltage hanges.
When smoke particles enter the ionization chamber, ions become attached to them with the result that the current flowing through the chamber decreases. This effect is greater in the chamber decreases.
