Spectrex 40/40U-UB - UV Flame Detector - Manual (Page 16)

SharpEye TM UV Flame Detector User Guide
4 Features and Benefits
1.3 Features and Benefits
 UV Spectrum design
 High Speed Response: 200msec. response to flash fire
 Built In Test (BIT): Manual and Automatic (see Built-In-Test (BIT) on
page 15).
 Heated Window: Prevents effects of icing, snow, condensation.
 Electrical Interface:
 Dry contact relays
 Communication network RS-485
 0-20mA output
 HART Protocol: Communication protocol (see HART Protocol on page 5).
 Exde: Integral junction box for easy wiring.
 SIL-2: TÜV approved (model 40/40UB only).
 Hazardous Area Certification: ATEX, IECEx, FM, CSA.
 Functionality Approval:
 EN54-10 approved by VdS
 FM approved per FM3260
1.4 Principles of Operation
This section describes the 40/40U and UB principles of operation and
includes:
 Detection Principles, page 4
 Heated Optics, page 5
 HART Protocol, page 5
 RS-485 Modbus, page 6
 Product Certification, page 6
1.4.1 Detection Principles
The Model 40/40U and UB Flame Detector is an electronic device designed
to sense the occurrence of fire and flames and subsequently activate an
alarm or an extinguishing system directly or through a control circuit.
The UV Flame Detector is a single spectrum optical detector sensitive to the
UV radiation spectrum that is present in fires. The detector monitors the
protected volume, by measuring the radiation intensity in it, within the
frequency range of the electromagnetic spectrum, namely the Ultra-Violet
(UV).