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E VERY L IFE H AS A P URPOSE… Flame Detection Theory.

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Presentation on theme: "E VERY L IFE H AS A P URPOSE… Flame Detection Theory."— Presentation transcript:

1 E VERY L IFE H AS A P URPOSE… Flame Detection Theory

2 Requirements of a Fire Oxygen Heat Fuel

3 Characteristics of a Fire  High Emissions of Ultraviolet Radiation  High Emissions of Infrared Radiation  Presence of Light, Smoke and Airborne Debris

4 False Alarm Sources  Arc Welding  Sunlight  Infrared Energy  Modulation  Reflective

5 Characteristics of a Fire Ultraviolet RegionVisible RegionInfrared Region Sun’s radiation reaching the Earth Relative Energy 300nm 400nm 800nm 2 to 3 microns Wavelength

6 UV Phototube 300nm 400nm 800nm 2 to 3 microns Ultraviolet RegionVisible RegionInfrared Region Sun’s radiation reaching the Earth Relative Energy 260nm 135nm

7 UV Phototube Ultraviolet Radiation Photocathode Electrons Anode - VDC + Gas-Filled Phototube

8 IR Devices 300nm 400nm 800nm 2 to 3 microns Wavelength Ultraviolet RegionVisible RegionInfrared Region Sun’s radiation reaching the Earth Relative Energy 4.35 microns

9 IR Devices 300nm 400nm 800nm 2.7 to 3.2 microns Wavelength Ultraviolet RegionVisible RegionInfrared Region Sun’s radiation reaching the Earth 4.35 microns Hydrogen fires emit H 2 O 2.95 microns Relative Energy

10 FlameGard 5 UV/IR Ultraviolet + Infrared Detection Photo-tube + Pyroelectric (Flicker)

11 FlameGard 5 UV/IR Features  Monitors in both UV and IR spectral ranges reducing possibility of false alarms caused by lightning, arc welding, hot objects etc.  Typical Response time: < 3 50ft  120° maximum horizontal field of view  -40°F to +185°F (-40°C to +85°C) operating temperature  COPM (Continuous Optical Path Monitoring)  RS-485 Modbus RTU, HART  Hydrogen fire configuration available

12 FlameGard 5 UV/IR Physical Characteristics Assembly  Three Distinct Explosion-proof Housings:  UV/IR  COPM Light Rods (Reflective Coated)  UV - Straight  IR - Curved  O-Ring Sealed Windows  Common Base with Bracket Mounting Holes  Two (2) Bottom Entry Conduit Connections (3/4” NPT)  “Drip Lip” (3/4 of housing mating surface)

13 FlameGard 5 UV/IR Specifications  Environmental  Temperature  FlameGard 5 UV/IR -40°C to 85°C (-40°F to 185°F)  Ratings  IP 66, Type 4X, Class I, Div 1, Groups B, C & D; Class II, Groups E, F & G; Class III

14 FlameGard 5 UV/IR Specifications  Performance  Improved detection and false alarm immunity  Field-of-View  FlameGard 5 UV/IR - 115° Vertical, 120° Horizontal  Optical Sensitivity  1 sq. ft. fire at 50 ft.

15 FlameGard 5 UV/IR Field of View (Horizontal)

16 FlameGard 5 UV/IR Field of View (Vertical)

17 FlameGard 5 UV/IR Specifications  Performance  Spectral Sensitivity  FlameGard 5 UV/IR: 185 to 260 nanometers & 4.35 microns  Response Time (Normal Operation

18 FlameGard 5 UV/IR Specifications  Outputs  4-20 mA Signal  0 mA, Fault  2 mA, COPM Fault  4 mA, Ready  8 mA, IR Only  12 mA, UV Only  16 mA, Warn  20 mA, Alarm (After time delay)

19 FlameGard 5 UV/IR Specifications  Outputs  Commands  Read Only  4-20 mA  Alarm, Warning, Fault  UV Only Signal, IR Only Signal  UV Source Lamp Fault, IR Source Lamp Fault  Low Voltage  Communication Faults  Write Only  Auto Test, Reset, Accept  Read and Write  Address, Modbus Setup  Sensitivity (100%, 75%, 50%)  Time Delay, Relay States

20 FlameGard 5 UV/IR Specifications  Outputs  Relays: (3) SPDT (8-amp, 24 VDC/250 VAC Resistive)  Warning (Immediate, no time delay)  Alarm (After 2, 4, 8 or 10 Sec. Time Delay)  Dip Switch Selectable  RS-485 Selectable (Non-intrusive over-ride)  Fault (Energized, non-latching )

21 FlameGard 5 UV/IR Specifications  System  Modes:  Normal  Self Test (Power-up)  Alarm Test (Remote)  Fault Diagnostic -Status Indication (LED)  Other Fault Diagnostics via RS-485

22 FlameGard 5 UV/IR Specifications  Approvals  CSA, FM, ATEX, CE Marking  Power  VDC 150 mA Max.  Input Terminals  Test and Reset  Wiring: 12 AWG to 22 AWG

23 FlameGard 5 Test Lamp  Rechargeable/replaceable batteries  Easy grip handle integral with housing  Spring return on/off switch to conserve battery life  Explosion-proof cast aluminum housing  CSA Approved  ATEX Approved

24 Key Features / Benefits  Excellent Discrimination of False Alarms  UV detection in the nanometer range which is well below natural sunlight and artificial light.  IR detection at 4.3 microns which is the CO 2 spike generated from hydrocarbon fires.  Flicker discrimination algorithm, which eliminates false alarms from IR sources.  Arc welding and lightning will not cause the FlameGard UV/IR to go to false alarm.

25 Key Features / Benefits  “COPM” Continuous Optical Path Monitoring  We check the optical path once every minute on both the UV and IR sides to make sure the windows are not dirty, and that the test sources and detectors are working properly.  Wide Angle of View  120° angle of view is the widest in the industry which allows for a larger area of coverage and a reduced number of detectors.

26 Key Features / Benefits  Hydrogen Fire Specific Flame Detector  Uses a wavelength of microns on the IR detector to detect the water spike of Hydrogen fires.  Output Capability  Three programmable relays (8 AMP)  0-20 mA stepped output to allow quick diagnostics for UV only, IR only, COPM Fault and overall Failures  Modbus for digital communication  HART------Digital Communication protocol. Communicates via analog output line.


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