Ultraviolet / Infrared
Flame Detector
User Manual
Model:
UV/IRS-A-X OR AR-X
MAN-0075 Rev 04 UVIRS-A-X/AR-X
November 23, 2012
Net Safety Monitoring
IMPORTANT INFORMATION
This manual is for informational purposes only. Although every effort has
been made to ensure the correctness of the information, technical
inaccuracies may occur and periodic changes may be made without notice.
Net Safety Monitoring Inc., assumes no responsibility for any errors
contained within this manual.
If the products or procedures are used for purposes other than as described in
the manual, without receiving prior confirmation of validity or suitability,
Net Safety Monitoring Inc., does not guarantee the results and assumes no
obligation or liability.
Complete instructions have been provided for the safe service, use,
installation, configuration and maintenance of this product in compliance
with EN 60079-14 and EN 60079-10 for hazardous locations. Ensure this
manual is read thoroughly before installation or operation.
No part of this manual may be copied, disseminated or distributed without
the express written consent of Net Safety Monitoring Inc.
Net Safety Monitoring Inc., products are carefully designed and
manufactured from high quality components and can be expected to provide
many years of trouble free service. Each product is thoroughly tested,
inspected and calibrated prior to shipment. Failures can occur which are
beyond the control of the manufacturer. Failures can be minimized by
adhering to the operating and maintenance instructions herein. Where the
absolute greatest of reliability is required, redundancy should be designed
into the system.
Warranty
Net Safety Monitoring Inc., warrants its sensors against defective parts and
workmanship for a period of 24 months from date of purchase; other
electronic assemblies for 36 months from date of purchase.
No other warranties or liability, expressed or implied, will be honoured by
Net Safety Monitoring Inc.
Contact Net Safety Monitoring Inc or an authorized representative for details.
We welcome your input at Net Safety Monitoring. If you have any comments
please contact us at the phone/address below or visit our web site and
complete our on-line customer survey: www.net-safety.com.
Contact Information
Net Safety Monitoring Inc.
2721 Hopewell Place NE
Calgary, AB
Canada
T1Y 7J7
Telephone: (403) 219-0688 Fax: (403) 219-0694
www.net-safety.com
E-mail: | Email: nsmsales@net-safety.com
Copyright © 2007 Net Safety Monitoring Inc.
Printed in Canada
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November 23, 2012
TABLE OF CONTENTS
Important Information ...................................................................................... 3
Warranty .......................................................................................................... 3
Contact Information ......................................................................................... 3
Introduction ...................................................................................................... 5
Spectral Sensitivity Range ........................................................................... 5
Locate Detector ........................................................................................... 5
Typical applications ..................................................................................... 5
Potential ignition sources ............................................................................. 5
Potential inhibitors ....................................................................................... 6
Absorbing Gases ......................................................................................... 6
Immune ........................................................................................................ 6
Range .............................................................................................................. 6
Field of View (as per FM and NFPA definition) ............................................... 7
Installation Considerations .............................................................................. 7
Unpack ............................................................................................................ 8
Reflector Positioning ....................................................................................... 9
Field Installation ............................................................................................ 10
Wiring ......................................................................................................... 10
Grounding .................................................................................................. 10
Sealing ....................................................................................................... 10
Connecting................................................................................................. 11
Detector Setup .............................................................................................. 13
System Sensitivity ..................................................................................... 13
DIP Switch Access ................................................................................. 13
Sensitivity Setting ................................................................................... 13
Time Delay Setting ................................................................................. 13
Closing the Housing ............................................................................... 14
Relay Settings ............................................................................................... 14
Coil and Latch Status ................................................................................ 14
Remote Reset ........................................................................................ 14
Final Setup ............................................................................................. 14
Detector Functionality ................................................................................... 15
Detector Window/Lens .............................................................................. 15
Start Up Procedure .................................................................................... 15
System Check............................................................................................ 15
Monitor ....................................................................................................... 15
Condition Status—LEDs ........................................................................ 15
Condition Status—Current Output ......................................................... 16
Detector Maintenance ................................................................................... 17
Testing ....................................................................................................... 17
Manual Check Procedure .......................................................................... 17
Automatic Visual Integrity (VI) Test ........................................................... 17
Manual VI Test ........................................................................................... 17
Test Procedure ...................................................................................... 18
Cleaning Window/Lens and Reflector ........................................................... 19
O-ring ......................................................................................................... 19
How To Return Equipment ............................................................................ 20
Troubleshoot ................................................................................................. 21
Appendix A: Common UV Absorbing Gases ................................................ 22
Appendix B: Electrostatic Sensitive Device (ESD) ........................................ 23
Appendix C: Resistance Table ...................................................................... 24
Appendix D: Specifications ........................................................................... 25
Appendix E: UVIRS DATA ............................................................................ 26
Appendix E: UVIRS DATA (continued) ........................................................ 27
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automotive-manufacturing and paint spray booths
aircraft hangars (commercial and military)
offshore platforms, refineries, pipelines and production ships
printing industry facilities
oil, gas and petrochemical refineries/production/storage/off loading/shipping
various production, processing and storage facilities
munitions handling
warehouses (flammable liquids/toxic gases) and tank farms (floating/non-floating)
power generation pumps, generators and unmanned stations
alcohol
acetylene
diesel and hydraulic fuel
gasoline
natural gas
liquefied natural gas (LNG)
paint
solvents
liquefied petroleum gas (LPG)
aviation fuel
heptane/naptha
propane/methane/butane
INTRODUCTION
The UV/IRS is a smart, stand-alone fire detector, combining sensors for both
the ultra-violet and infrared spectra. The detector is designed to respond to a
wide range of hydrocarbon based fires and the rugged design is ideal for both
indoor and outdoor applications.
The microcontroller monitors and analyzes each sensor to identify a variety
of flame conditions. Only when the defined detection criteria for both IR and
UV sensors indicate a fire condition will the detector alarm.
Spectral Sensitivity Range
The UV/IRS fire detector responds to UV radiation wavelengths of 185 to
260 nanometres (1850 to 2600 angstroms) and IR radiation in the 4.4 micron
range. Note that UV radiation reaching the earth from the sun does not
extend into the sensitivity range of the detector, nor does radiation from
normal artificial lighting, such as fluorescent, mercury vapour and
incandescent lamps.
Locate Detector
When positioning fire detectors, consider such factors as, distance from the
fire, type of fuel and temperature, as well as any environmental factors which
may influence the detector’s response to radiation.
Typical applications
Potential ignition sources
A hydrocarbon fuel-based fire can erupt in areas where the following are
found:
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steady hot body radiation
artificial lighting
sunlight (direct/reflected)
arc welding radiation
Response Testing
Fuel
Size
Distance
(ft/m)
Average
Response Time
(Seconds)
n-Heptane
1' x 1'
140/42.7
10.6
Methanol
1' x 1'
40/12.2
9.7
Methane
36" Plume
100/30.5
5.9
Propane
16" Plume
35/10.6
4.0
Jet Fuel
1' x 1'
90/27.4
4.7
Diesel
1' x 1'
80/24.4
5.1
Lube Oil
1' x 1'
50/15.2
6.7
Ethanol
1' x 1'
60/18.3
5.7
Gasoline
1' x 1'
120/36.6
5.9
Potential inhibitors
A potential inhibitor is anything located between the detector and a potential
fire source which could prevent the UV/IRS from detecting a fire or reduce
its sensitivity to fire. Possible inhibitors include but are not limited to the
following:
Solid objects such as machinery, glass or plexiglass between the detector
and potential fire source
Water, fog, rain, dirt or dust on the detector window or heavy smoke
between the detector and potential fire source
Absorbing Gases
A further potential inhibitor may be the presence of UV absorbing gases or
chemical vapours between the detector and source of potential fire. Such
gases could impede the detector’s ability to detect a UV flame source. Small
concentrations of these gases may not be sufficient to obstruct the sensor but
high concentrations may impede the UV sensor. Moving the detectors closer
to the probable fire source and increasing the sensitivity can, in some
circumstances, overcome this issue (refer to Appendix A ).
Immune
The UV/IRS exhibits excellent immunity to many conditions/activities
including but not limited to the following:
RANGE
The practical application distance is directly related to the intensity of the
ultraviolet/infrared radiation source.
Table 1: Response Testing
NOTE: The response time is based on zero time delay and maximum
sensitivity.
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Field of View Testing
Fuel
Size
Horizontal
Degrees
Vertical
Degrees
n-Heptane
1' x 1'
120 (+60, -60)
120 (+60, -60)
Methanol
1' x 1'
120 (+60, -60)
105 (+45, -60)
Methane
36" Plume
120 (+60, -60)
95 (+35, -60)
Propane
16" Plume
110 (+55, -55)
95 (+35, -60)
Jet Fuel
1' x 1'
120 (+60, -60)
95 (+35, -60)
Diesel
1' x 1'
120 (+60, -60)
95 (+35, -60)
Lube Oil
1' x 1'
120 (+60, -60)
95 (+35, -60)
Ethanol
1' x 1'
120 (+60, -60)
100 (+40, -60)
Gasoline
1' x 1'
120 (+60, -60)
95 (+35, -60)
Field of View (as per FM and NFPA definition)
The area in front of a flame detector, where a standardized flame can be
detected and which is specified by distance and angle off the central axis, is
the Field of View. The referenced flame is moved to 50% of the maximum
on-axis detection distance and then moved off-axis horizontally and
vertically to the limit of detection. These off-axis angle limits specify Field
of View.
Table 2: Field of View Testing
Installation Considerations
The following should be considered when mounting flame detectors.
Point detector toward where the flame is expected.
Ensure an unobstructed view of the area to be monitored.
Employ more than one detector to ensure the hazard is fully covered.
Mount the detector a few feet (about 1 metre) below the ceiling so it can
respond before being blocked by smoke accumulation at the ceiling.
If dense smoke is likely to accumulate prior to flame (as in an electrical
fire), supplement UV/IR detector(s) with other protection such as Net
Safety Monitoring Airborne Particle Monitor.
The detector should be accessible for cleaning the window/lens and
reflector surfaces.
Tilt detector downward a minimum of 10 to 20° to reduce dirt and dust
accumulation which could obscure the detector’s viewing window.
Securely mount detector so as to reduce vibration as much as possible.
When located outside, detector sensitivity can be reduced by heavy fog,
rain and/or ice.
NOTE: Data based on Maximum Sensitivity Setting.
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November 23, 2012
Consider shortening the time delay settings when smoke is expected to
accumulate before or during a fire (refer to "System Sensitivity").
Reduce sensitivity setting if false alarms, related to surrounding activities,
occur (refer to "System Sensitivity" )
When installed near or on water (such as an off shore platform), be sure to
take into account the low horizon level when tilting detector downward.
UV radiation, other than that produced by an actual fire, is referred to as
"background UV". An example of a high level of background UV could
be a flare stack situated outside of a building. The UV radiation produced
by this flare, in conjunction with a false alarm IR source, may be
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detected as fire when a door to the building is opened. Windows or other
reflective surfaces may also cause unusually high levels of UV radiation
to enter the building from the flare. In a situation like this, the fire
detection system response must be carefully checked and the sensitivity
level adjusted high enough so that this "background UV" will not cause
false alarms.
UV fire detectors respond to radiation other than ultraviolet. X-rays in
conjunction with a false alarm IR source can activate the detector. Since
X- rays are often used in industrial inspection it may be necessary to
disable the system when inspections are conducted nearby.
For protection against line surge and extraneous transients, it is required to
install detector wires in a braided flexible conduit less than 5 feet.
UNPACK
Carefully remove all components from the packaging. Check components
against the enclosed packing list and inspect all components for obvious
damage such as broken or loose parts.
If you find any components missing or damaged, notify the representative or
Net Safety Monitoring immediately.
Figure 1: Detector Housing and Swivel Mount
Note: Units are factory sealed.
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Figure 2: Dimensional Drawing
REFLECTOR POSITIONING
Ensure the external VI reflector is placed directly over the VI Emitters (refer
to Figure 7 for VI source location). Also ensure the detector is mounted with
the VI reflector in the top position, centred over the yellow dot.
Figure 3: Position of VI Reflector
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