Scott Safety MultiFlame FV-40 Series User manual

User Guide
087-0056
Rev. F
MULTIFLAME
FV‐40SeriesFlameDetector

MultiFlameFV‐40User
Guide



FLAMEDETECTOR

FV-40 Series Flame Detector Important Information
iii 087-0056 REV F
Legal Notice
© 2018 Scott Safety. SCOTT, the SCOTT SAFETY Logo, Scott Health
and Safety, and MultiFlame are registered and/or unregistered marks of
Scott Technologies, Inc. or its affiliates.
All rights reserved. No part of this documentation may be reproduced in
any form or by any means or used to make any derivative work (such
as translation, transformation, or adaptation) without written
permission from Scott Safety.
Scott Safety reserves the right to revise this documentation and to
make changes in content from time to time without obligation on the
part of Scott Safety to provide notification of such revision or change.
Scott Safety provides this documentation without warranty, term, or
condition of any kind, either implied or expressed, including, but not
limited to, the implied warranties, terms or conditions of
merchantability, satisfactory quality, and fitness for a particular
purpose. Scott Safety may make improvements or changes in the
product(s) described in this documentation at any time.
While every effort has been made to ensure accuracy in this guide, no
responsibility can be accepted for errors or omissions. This publication
is not intended to form the basis of a contract, and the company
reserves the right to amend the design, content, and specifications of
the detector without notice.
If you have any questions, please contact: Scott Safety, 4320 Goldmine
Road, Monroe, NC 28110, Telephone [phone], FAX 704-291-
8330, E-mail mailto:[email protected]
Web http://www.scottsafety.com
Microsoft, Windows, Windows 2000, Windows Me, Windows XP,
Windows NT, Windows Vista, Windows 7, Internet Explorer and MS-DOS
are either trademarks or registered trademarks of Microsoft Corporation
in the United States and other countries. HART is a registered
trademark of the HART Communication Foundation. All other products
or service names are the property of their respective owners.
The international transport of this device is regulated under United
States export regulations and may be regulated by the import
regulations of other countries.

FV-40 Series Flame Detector Important Information
iv 087-0056 REV F
Warning: This manual should be read carefully by all
individuals who have or will have responsibility for using,
maintaining or servicing the product. Failure to use this
equipment properly may result in serious injury or
death.
The Detector is not field-repairable due to the meticulous
alignment and calibration of the sensors and the respective
circuits. Do not attempt to modify or repair the internal circuits
or change their settings, as this will impair the system's
performance and void the Scott Safety product warranty.
Warranty
SCOTT SAFETY Agrees to extend to Purchaser/Distributor a warranty on the SCOTT SAFETY
supplied components of the MultiFlame products. SCOTT SAFETY warrants to
Purchaser/Distributor that the products are free from defects in materials and workmanship for
a period of five (5) years, commencing with the date of shipment from SCOTT SAFETY. SCOTT
SAFETY expressly excludes damage incurred in transit from the factory or other damage due to
abuse, misuse, improper installation, or lack of maintenance or “Act of God” which are above
and beyond its control. SCOTT SAFETY will, upon receipt of any defective product,
transportation prepaid, repair or replace it at its sole discretion if found to have been defective
when shipped. Said repair or replacement is SCOTT SAFETY’S sole liability under this warranty
and SCOTT SAFETY’S liability shall be limited to repair or replacement of the component found
defective and shall not include any liability for consequential or other damages. The customer is
responsible for all freight charges and taxes due on shipments both ways. This warranty is
exclusive of all other warranties express or implied.
Warnings
Ensure you follow the applicable warnings and cautions indicated here.
Failure to follow the applicable Warnings and Cautions indicated in
this User Guide may result in serious injury or death.
Failure to properly use this equipment may result in serious injury
or death.
Warning: This equipment must be operated and serviced by
qualified personnel only. Read and understand the guide completely before
operating or servicing. Qualified personnel as defined according to local,
county, state, federal and individual company standards.
Warning: When in doubt vacate the area immediately. You should
vacate the area immediately should the device indicate a warning or alarm
condition. You should know and understand your company's safety
protocols.

Important Information FV-40 Series Flame Detector
087-0056 REV F v
Warning: When the primary device is off line, ensure you have
another online device to actively detect flame. The device may be off line
due to such activities, like but not limited to, calibration, installation,
maintenance, troubleshooting, configuration, wiring and other activities.
Warning: If the device does not function as described herein,
remove from service and mark for maintenance. Only use Scott Safety
replacement parts.
Warning: Only use the device to monitor the zone for the flame
types for which it is set-up to detect.
Warning: Verify the cover, internal PCB's and field wiring are
securely in place before applying power and operation.
Warning: Do not expose the device to electrical shock or
continuous severe mechanical shock.
Warning: Do not use the device if its enclosure is damaged,
cracked, or has missing components.
Warning: Protect the device from dripping liquids and high power
sprays.
Warning: Device will not operate without power applied. Thus, it
only detects flames while powered.
Warning: Periodically test for correct operation of the system's
alarm events by exposing the device to a targeted flames above the high
alarm set point.
Warning: Calibration is critical. Calibration should be performed
periodically that takes into account device use and environment conditions.
Calibrate with known flame simulators and check on a regular schedule.

Important Information FV-40 Series Flame Detector
087-0056 REV F vi
Related Product Documentation
Document Name Purpose Document
ID
WinHost Software to change the
required functions and for
maintenance of the unit.
0087-0058
HART Communicator Device to change the
required functions and for
maintenance of the unit,
using HART protocol.
087-0057
If you have any questions regarding the product of this manual, contact Scott Safety
at 1-800-247-7257, or refer to Technical Support section for other contact information.

Important Information FV-40 Series Flame Detector
vii 087-0056 REV F
Release History
Rev Revision History
A Initial Release
B Not released.
C Updated ATEX approvals. Removed references to the Mini Laptop Kit
and its I.S. Handheld Unit manual.
D Update to ATEX and IECEX certificate numbers.
E Technical/Specification updates. Product brand changed to
‘MultiFlame’.
F Edited text in Section D.1.4; added 3M logo, and removed all
references to Tyco; updated service center contact info.

Important Information FV-40 Series Flame Detector
087-0056 REV F viii
About this Guide
This guide describes the MultiFlame FV-40 Series Flame Detector and its
features and provides instructions on how to install, operate and maintain
the detector.
This guide includes the following chapters and appendixes:
Chapter 1, Introduction, provides a general overview of the product,
principles of operation, and performance considerations.
Chapter 2, Installing the Detector, describes how to install the
detector including preparations before installation, wiring and mode
settings.
Chapter 3, Operating the Detector, describes how to power-up and
test the detector. The chapter also lists safety precautions you should
take when operating the detector.
Chapter 4, Maintenance and troubleshooting, describes basic
maintenance procedures, and troubleshooting and support procedures.
Appendix A, Technical Specifications: Lists the detectors technical
and other specifications.
Appendix B, Wiring Instructions, lists the wiring instructions for
connecting the detector and also provides examples of typical wiring
configurations.
Appendix C, RS-485 Communication Network, provides an overview
of the RS-485 communications network.
Appendix D, Accessories, describes the accessories available for the
detector.
Appendix E, SIL-2 Features, describes the special conditions to
comply with the requirements of EN 61508 for SIL 2 according to TUV.
Appendix F, Online FV-40 Configurator Part Code, describes the
part codes to place an order for the FV-40.

Important Information FV-40 Series Flame Detector
087-0056 REV F ix
Abbreviations and Acronyms
Abbreviation Meaning
ATEX Atmosphere Explosives
AWG American Wire Gauge
BIT Built In Test
EMC Electromagnetic Compatibility
EOL End of Line
FOV Field of View
HART Highway Addressable Remote Transducer-
communication protocol
IAD Immune at Any Distance
IECEx International Electrotechnical Commission Explosion
IPA Isopropyl Alcohol
IR Infrared
JP5 Jet Fuel
Latching Refers to relays remaining in the ON state even after
the ON condition has been removed
LED Light Emitting Diode
LPG Liquefied Petroleum Gas
mA MilliAmps (0.001 amps)
MODBUS Master-slave messaging structure
N.C. Normally Closed
N.O. Normally Open
N/A Not Applicable
NFPA National Fire Protection Association
NPT National Pipe Thread
SIL Safety Integrity Level
UNC Unified Coarse Thread
μMicron is a measure of wavelength
VAC Volts Alternating Current

Important Information FV-40 Series Flame Detector
087-0056 REV F 1
Table of Contents
Legal Notice ................................................................................................. iii
Warranty...................................................................................................... iv
Warnings ..................................................................................................... iv
Related Product Documentation....................................................................... vi
Release History .............................................................................................vii
About this Guide ..........................................................................................viii
Abbreviations and Acronyms ........................................................................... ix
1Introduction .............................................................................................. 6
1.1Overview ............................................................................................. 6
1.2Model and Types................................................................................... 7
1.3Features and Benefits .......................................................................... 10
1.4Principles of Operation......................................................................... 11
1.4.1Detection Principles ....................................................................... 11
1.4.2Heated Optics............................................................................... 13
1.4.3HART Protocol .............................................................................. 14
1.4.4RS-485 Modbus ............................................................................ 14
1.4.5Product Certification ...................................................................... 14
1.5Performance Considerations ................................................................. 16
1.5.1Detection Sensitivity...................................................................... 16
1.5.2Cone of Vision .............................................................................. 17
1.5.3False Alarms Prevention................................................................. 18
1.5.4Visual Indicators ........................................................................... 19
1.5.5Output Signals.............................................................................. 20
1.5.6Detector Status ............................................................................ 21
1.5.7Auxiliary Relay as End-of-Line Resistor............................................. 22
1.6Internal Detector Tests ........................................................................ 22
1.6.1Built-In-Test (BIT) ........................................................................ 23
2Installing the Detector............................................................................. 26
2.1General Guidelines .............................................................................. 26
2.2Unpacking the Product......................................................................... 27
2.2.1Checking the Product Type ............................................................. 28

Important Information FV-40 Series Flame Detector
087-0056 REV F 2
2.3Required Tools.................................................................................... 28
2.4General Instructions ............................................................................ 29
2.4.1Special Instructions for Safe Use ..................................................... 29
2.5Installation Cables............................................................................... 31
2.5.1Conduit Installation ....................................................................... 31
2.6Installing the Tilt Mount ....................................................................... 32
2.6.1Tilt Mount Assembly ...................................................................... 32
2.7Connecting the Detector ...................................................................... 34
2.7.1Verifying the Detector Wiring.......................................................... 35
2.8Configuring your Detector .................................................................... 36
2.8.1Sensitivity.................................................................................... 37
2.8.2Alarm Delay ................................................................................. 37
2.8.3Address Set-up............................................................................. 38
2.8.4Function Set-up ............................................................................ 38
2.8.5Heated Optics............................................................................... 38
3Operating the Detector............................................................................ 40
3.1Powering Up....................................................................................... 40
3.2Safety Precautions .............................................................................. 41
3.2.1Default Functions Settings.............................................................. 41
3.3Testing Procedures.............................................................................. 42
3.3.1Automatic BIT Test........................................................................ 42
3.3.2Manual BIT Test............................................................................ 42
3.3.3Testing with Flame Simulators ........................................................ 42
4Maintenance and Troubleshooting........................................................... 44
4.1Maintenance....................................................................................... 44
4.1.1General Procedures ....................................................................... 44
4.1.2Periodic Procedures ....................................................................... 45
4.1.3Keeping Maintenance Records......................................................... 45

Important Information FV-40 Series Flame Detector
087-0056 REV F 3
4.2Troubleshooting.................................................................................. 45
Appendices.................................................................................................... 47
ASpecifications .......................................................................................... 48
A.1Technical Specifications ....................................................................... 48
A.2Electrical Specifications........................................................................ 51
A.3Outputs ............................................................................................. 52
A.4Mechanical Specifications ..................................................................... 54
A.5Environmental Specifications ................................................................ 54
BWiring Instructions.................................................................................. 56
B.1General Instructions for Electrical Wiring ................................................ 56
B.2Typical Wiring Configurations................................................................ 58
CRS-485 Communication Network............................................................. 62
C.1RS-485 Overview ................................................................................ 62
DAccessories.............................................................................................. 63
D.1Long Range Flame Simulators............................................................... 63
D.1.1Unpacking.................................................................................... 64
D.1.2Operating Instructions ................................................................... 64
D.1.3Range ......................................................................................... 64
D.1.4Charging the Battery ..................................................................... 65
D.1.5Technical Specifications ................................................................. 67
D.2Tilt Mount .......................................................................................... 68
D.3Duct Mount ........................................................................................ 69
D.4Weather Protection.............................................................................. 70
D.5Laser Detection Coverage Pointer .......................................................... 71
D.6Air Shield........................................................................................... 72
ESIL-2 Features......................................................................................... 73
E.1FV-40 Series Flame Detector ................................................................ 73
E.1.1Safety Relevant Parameters............................................................ 73
E.1.2Guidelines for Configuring, Installing, Operating and Service ............... 73
FF Online FV-40 Configurator Part Code .................................................... 76
F.1Technical Support ............................................................................... 79

Important Information FV-40 Series Flame Detector
087-0056 REV F 4
List of Figures
Figure 1: Indication LED................................................................................... 19
Figure 2: Detector with Tilt Mount ..................................................................... 32
Figure 3: Tilt Mount Assembly........................................................................... 32
Figure 4: Tilt Mount Assembly (dimensions in mm and inches) .............................. 33
Figure 5: Detector with Cover Removed ............................................................. 35
Figure 6: Wiring Terminals ............................................................................... 58
Figure 7: Typical Wiring for 4 Wire Controllers (Using Option 1 or 2 Wiring)............. 59
Figure 8: 0-20mA Wiring Option 1 (Sink 4-Wire) - Default .................................... 60
Figure 9: 0-20mA Wiring Option 1 (Converted to Source 3-Wire) ........................... 60
Figure 10: 0-20mA Wiring Option 1 (Non-isolated Sink 3-Wire) ............................. 61
Figure 11: 0-20mA Wiring Option 2 and 3 (Source 3-Wire available with the HART
Protocol)........................................................................................................ 61
Figure 12: RS-485 Networking .......................................................................... 62
Figure 13: Flame Simulator 380114-1 ................................................................ 63
Figure 14: Flame Simulator Battery Replacement................................................. 65
Figure 15: Tilt Mount ....................................................................................... 68
Figure 16: Duct Mount ..................................................................................... 69
Figure 17: Weather Protection .......................................................................... 70
Figure 18: Laser Detection Coverage Pointer....................................................... 71
Figure 19: Air Shield........................................................................................ 72

Important Information FV-40 Series Flame Detector
087-0056 REV F 5
List of Tables
Table 1: Base Part Number / Sensor Type ............................................................ 7
Table 2: Part Dash Number / Configuration Code ................................................... 8
Table 3: Configuration Code Key ......................................................................... 9
Table 4: Detector Sensitivity Range Levels.......................................................... 16
Table 5: Fuel Sensitivity Ranges........................................................................ 17
Table 6: False Alarms Prevention....................................................................... 18
Table 7: Welding Immunity Distance.................................................................. 19
Table 8: LED Indications .................................................................................. 19
Table 9: Available Output Types........................................................................ 20
Table 10: Detector Status ................................................................................ 21
Table 11: Output Signals versus Detector State................................................... 21
Table 12: Result of a Successful BIT .................................................................. 24
Table 13: Results of an Unsuccessful BIT............................................................ 24
Table 14: Results of a Successful Manual BIT ...................................................... 25
Table 15: Results of an Unsuccessful Manual BIT ................................................. 25
Table 16: Tools............................................................................................... 28
Table 17: Flame path dimensions ...................................................................... 29
Table 18: FV-40 Series Wiring Options ............................................................... 35
Table 19: Sensitivity Settings ........................................................................... 37
Table 20: Functions......................................................................................... 38
Table 21: Default Function Values ..................................................................... 41
Table 22: Results of Successful Fire Simulator Test .............................................. 43
Table 23: Troubleshooting Table........................................................................ 46
Table 24: Electrical Specifications...................................................................... 51
Table 25: Contact Ratings ................................................................................ 52
Table 26: 20 mA Current Output ....................................................................... 53
Table 27: Electromagnetic Compatibility (EMC) ................................................... 55
Table 28: Maximum DC resistance at 68°F (20ºC) for copper wire.......................... 56
Table 29: Wiring length in feet (meter) .............................................................. 57
Table 30: Wiring Connections ........................................................................... 59
Table 31: Sensitivity Ranges............................................................................. 64
Table 32: EMI Compatibility.............................................................................. 67
Table 33: Part Number Configuration (Online Ordering) ........................................ 76
Table 34: Configurable Options (Online Ordering) ................................................ 77

FV-40 Series Flame Detector
087-0056 REV F 6
1 Introduction
1.1 Overview
Depending on the model selected, the FV-40 Series can provide a
combination of UV and IR sensors, where the IR sensor operates at a
wavelength of 2.5-3.0 µm, and can detect hydrocarbon-based fuel and gas
fires, hydroxyl and hydrogen fires, as well as metal and inorganic fires with
ultrafast ability to detect fire or explosion in less than 20 msec. Other
models have an IR sensor works at a wavelength of 4.5 µm and are only
suitable for hydrocarbon-based fires.
Note Models FV-UV and FV-UB: These UV Flame detectors should not be
exposed to a UV radiation source, for example; welding, sparks and an
electronic arc, as it will result in a false alarm.
All FV-40 Series detectors include a heated optical window for improved
performance in icing, snow and condensation conditions.
Detection performance can be easily adapted to all environments,
applications and requirements, by changing the detector’s configuration
parameters. Adjusting these parameters, as well and performing other
maintenance and monitoring tasks, is possible by means of RS-485 based
Modbus communication or HART communication (in models with 0-20mA
output).
The detector enclosure is ATEX certified Exd flameproof with an integral,
segregated, rear, Exe terminal compartment (avoiding exposure of the
sensors and electronics to surrounding environment). Hence the combined
approval.
Ex II 2G DEx db eb op is IIC T4 GbEx tb op is IIIC T96°C Db
(–55°C ≤Ta ≤+75°C)
or
Ex II 2G DEx db eb op is IIC T4 GbEx tb op is IIIC T106°C Db
(–55°C ≤Ta ≤+85°C)
The MultiFlame FV-40 detectors are designed to operate as a stand-alone
unit directly connected to an alarm system or an automatic fire
extinguishing system. The detector can also be a part of a more complex
system, where many detectors and other devices are integrated through a
common control unit.
Warning: The MultiFlame units are only a detector of open flames.
They do not provide an audible or visible alarm. If audible, visible, or other
warning is required, failure to connect the MultiFlame unit to the required
alarm could result in serious injury or death.

Introduction FV-40 Series Flame Detector
087-0056 REV F 7
1.2 Model and Types
Failure to choose and use the proper model and detector sensor type
for a given site and location may result in serious injury or death.
The FV-40 Series flame detectors are provided in various configurations
depending on:
Type of Sensor
Wiring options
Temperature ranges
Type of cable entries
Housing type
Required regulatory approval
Using the part number found on the regulatory label of the unit, here is the
definition of the base features for your unit:
Table 1: Base Part Number / Sensor Type
BasePart
NumberDetectorSensorType
093‐0554SingleIR
093‐0555MultiIR
093‐0556TripleIR
093‐0557UV
093‐0558UV‐B(withBIT)
093‐0559UV/IR2.5umwavelength
093‐0560UV/IRB2.5umwavelength(withBIT)
093‐0561UV/IR4umwavelength
093‐0562UV/IRB4umwavelength(withBIT)
093‐0611UltraFastUV/IR

Introduction FV-40 Series Flame Detector
087-0056 REV F 8
Following the base part number is a two digit “Dash” number -01 through
-40 which identifies specific features as defined below:
Table 2: Part Dash Number / Configuration Code
Dash
number
Config
Code
Dash
number
Config
Code
Dash
number
Config
Code
‐011FA‐213DS‐411ES
‐021FS‐223AA‐421BS
‐031AS‐233CA‐431EA
‐041CS‐243DA‐441BA
‐051DS‐254FA‐452ES
‐061AA‐264FS‐462BS
‐071CA‐274AS‐472EA
‐081DA‐284CS‐482BA
‐092FA‐294DS‐493ES
‐102FS‐304AA‐503BS
‐112AS‐314CA‐513EA
‐122CS‐324DA‐523BA
‐132DS‐335FA‐534ES
‐142AA‐345FS‐544BS
‐152CA‐355AS‐554EA
‐162DA‐365CS‐564BA
‐173FA‐375DS‐575ES
‐183FS‐385AA‐585BS
‐193AS‐395CA‐595EA
‐203CS‐405DA‐605BA
Use the 3 character configuration code from above to determine the specific
features of your product based on the description in the Table 3 below.

Introduction FV-40 Series Flame Detector
087-0056 REV F 9
Table 3: Configuration Code Key
Code1
Wiring
Code2
Approval/Thread
type/MaxTemp
Code3
Housing
1RS485,4‐20mAasSink,Faultrelay
NC,noAccessoryrelay,Alarmrelay
NO,HART
FFactoryMutual,3/4
EnglishThreadand
75C
SStainless
Steel
2RS485,4‐20mAasSource,Faultrelay
NC,noAccessoryrelay,Alarmrelay
NO/NC,HART
AATEX,M25Thread,
75C
AAluminum
3RS485,4‐20mAasSource,Faultrelay
NO,noAccessoryrelay,AlarmRelay
NO/NC,HART
CATEX,3/4English
Thread,75C
 
4RS485,no4‐20mA,FaultrelayNC,
AccessoryrelayNO,AlarmrelayNO
DFactoryMutual,M25
MetricThreadand
75C
 
5RS485,no4‐20mA,FaultrelayNO,
AccessoryrelayNO,AlarmrelayNO
   
    
Other user selectable options for the MultiFlame Detector come from the
factory set as follows, unless otherwise specified by the customer when
ordering:
-Alarm Delay: 3 seconds
-Optics Heating: Automatic on temperature change
-Alarm Bit: Enable automatic Bit
-Accessory Relay: None
-Sensitivity: 30 meters (100 feet)
The options can be adjusted by the user in the field using the HART Protocol
087-0057, WinHost for FV-40 Flame Detectors 087-0058 or 087-0055.
When ordering the FV-40 online, the product configuration detail is included
in the product part number (and on the sales order confirmation) and takes
the form: F4-XX-X-X-X-XX-X-X-X-X, where XX-X-X-X-XX-X-X-X-X defines
the model according to the Tables 30 and 31. However, the actual FV-40
detectors will be marked with the 093-XXXX-XX part numbering on the
regulatory tag, as described in Tables 1, 2 and 3.

Introduction FV-40 Series Flame Detector
087-0056 REV F 10
1.3 Features and Benefits
F4-2V, F4-2B, F4-4V, and F4-4B UV/IR Dual Sensor
UV/IR Dual Sensor
High Speed Response: 200msec. response to flash fire
F4-I3 Triple IR Sensor
Advanced Digital Processing of the Dynamic Characteristics of
Fire: Flickering, threshold correlation and ratio.
Multi IR Channels: Between 2-5 microns.
Field Programmable Sensitivity: Four ranges to avoid zone
crossover.
F4-MM Multi IR Sensor
Detects Hydrocarbons and Hydrogen Flames.
Detection Range: Up to 215 ft. (65m) for a 1 ft2(0.1m2) n-
heptane fire.
Advanced Digital Processing of the Dynamic Characteristics of
Fire: Flickering, threshold correlation and ratio.
F4-UV, F4-UB UV Sensor
UV Sensor design
High Speed Response: 200msec. response to flash fire
F4-UF UV/IR Ultra Fast Dual Sensor
High Speed Response: 20msec. response to flash fire
General Information for all Sensor Models
Ultra High Immunity to False Alarms: See Table 6: False Alarms
Prevention
See Table 6 on page 18.
Built In Test (BIT): Automatic (see Built-In-Test (BIT).
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).
Exde: Integral junction box for easy wiring.
SIL-2: TÜV approval (pending on some models).
Hazardous Area Certification: ATEX, IECEx, FM.
Functionality Approval: (next page)

Introduction FV-40 Series Flame Detector
087-0056 REV F 11
FM approved per FM3260
EN54-10 pending by VdS
1.4 Principles of Operation
This section describes the FV-40 Series principles of operation and includes:
Detection Principles
Heated Optics
HART Protocol
RS-485 Modbus
Product Certification
1.4.1 Detection Principles
The FV-40 Series Flame Detectors are electronic devices designed to sense
the occurrence of fire and flames and subsequently activate an alarm or an
extinguishing system directly or through a control circuit. Please refer to
the appropriate section below for the model of interest.
F4-I3 Triple IR Flame Detector
The detector’s principle of operation is based on patented IR3 technology.
This technology identifies the unique spectral signature that hot CO2has in
the infrared (IR), namely a peak of the intensity at wavelengths 4.2 to 4.7µ.
The original IR3 technique (such as implemented in the MultiFlame F4-I3
flame detector) utilizes three infrared sensors, each sensitive to its own
wavelength range. The first sensor is sensitive to wavelengths within the
emission peak of hot CO2. The other two sensors are sensitive to
wavelengths above and below this peak. In the event of fire, the signal
measured in the first sensor is significantly higher than those measured in
the other two sensors. In order to issue a fire alarm, the detector requires
that this occurs, as well as other conditions (for example, radiation is
flickering in frequencies typical of flames). If exposed to non-fire radiation
sources, the specific conditions required does not occur, and the detector
does not react.
The MultiFlame F4-I3 further includes an additional IR sensor, sensitive to a
different band within the emission peak of hot CO2. The signal of this sensor
is compared to those of the other three. This increases sensitivity for some
types of flames. (For example, gas flames).