Sensor window contamination
It is important to keep the sensor window clean and checks should be carried out at
regular intervals–determined locally according to the type and degree of contamination
encountered– to ensure optimal performance of the fl ame detector.
It is recommended that the fl ame detector be disabled when the window is being
cleaned.
Applications for Marine UV Flame Detectors
Flame detectors are used when detection is required to be unaffected by convection cur-
rents, draughts or wind; tolerant of fumes, vapours, responsive to a fl ame up to 25m away
and fast reacting.
Typical applications examples are:
• engine room
• factory
• garage
• hospital
• printing
• warehouse
Applications and locations to avoid:
• outdoors
• open windows and doorways
• electric sparks, arcs and welding
• UV lamps
• radiation sources
• prolonged ambient temperatures above 60°C
• exposure to water and ice
• gathering of dust or oil fi lms on sensor window
• fl ood or spot lighting falling directly on UV optics
• obstructions to fi eld of view
10. Inform all appropriate personnel on completion of the maintenance work and if
necessary record this work.
Technical Data
Supply voltage 12–33V DC (polarity insensitive)
Quiescent current 550μA
Alarm voltage 6 to 33V
Normal alarm current 61mA at 28V
54mA at 24V
20mA at 10V
Remote output characteristics Remote is a current sink to the negative
line limited to 17mA
Alarm indicator Red, Light Emitting Diode (LED)
Design alarm load 420Ω in series with a 2V drop
Hold voltage 6V (min)
Holding current 10mA (min)
Minimum voltage required 12V
to illuminate indicators
Alarm reset voltage <1V
Alarm reset time 1 second
Operating Range 25m for 0.1m² n-heptane fi re, EN54-10, class 1
2m for 0.1m² n-heptane fi re, EN54-10, class 3
Sensitivity Switch Options class 1 (default) and class 3, as in EN54-10,
clause 5.5
Field of view 90° cone
Spectral response UV 185 to 260nm
Operating temperature –40°C to +70°C (no condensation or icing)
Storage temperature –40°C to +85°C
Relative humidity 0-95% (no condensation)
IP rating 66
Housing material White polycarbonate V-0 rated to UL94
Dimensions 100mm diameter
40mm height, 48mm in base
Weight 150g detector, 210g in base
Additional Equipment
Stainless steel adjustable mount Part no. 29600-458
with deck head box
Portable fl ame detector test unit Part no. 29600-226
Deckhead Mounting Box Part no. 45681-217
2 7
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