Triple IR (IR3) Flame Detector
Model 20/20I
User's and Maintenance Manual
TM 20/20I, Rev. (6) August 2004
Factory Mutual
Approved
Class I Div. 1
Groups B, C, D
Class II Div. 1
Groups E, F, G
ATEX Approved
Ex II 2G
EExd IIB + H
EExde IIB + H
218 Little Falls Rd., Cedar Grove, NJ 07009 USA;
Phone: +1 (973) 239 8398 Fax: +1 (973) 239 7614
Web-Site: www.spectrex.net
T5
2
2
T5
C.S.A. Approved
Class I Groups B, C, D
Class II Groups E, F, G
; Email: spectrex@spectrex.net
S.A.A Approved
Class 1 Zone 1 Exd IIB T5
The SharpEye Optical Flame Detector described in this document is the property
of Spectrex, Inc.
No part of the hardware, software or documentation may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated into any
language or computer language, in any form or by any means, without prior
written permission of Spectrex, Inc.
While great efforts have been made to assure the accuracy and clarity of this
document, Spectrex, Inc. assumes no liability resulting from any omissions in this
document, or from misuse of the information obtained herein. The information in
this document has been carefully checked and is believed to be entirely reliable
with all of the necessary information included. Spectrex Inc. reserves the right to
make changes to any products described herein to improve reliability, function, or
design, and reserves the right to revise this document and make changes from
time to time in content hereof with no obligation to notify any persons of revisions
or changes. Spectrex, Inc. does not assume any liability arising out of the
application or any use of any product or circuit described herein; neither does it
convey license under its patent rights or the rights of others.
Warning:
This manual should be carefully read by all individuals who have or will have
responsibility for using, maintaining or servicing the product.
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 Spectrex, Inc. Product warranty.
Spectrex Inc. - SharpEye
TM
IR3 Flame Detector Manual – TM 20/20I, Rev. (6) August 2004
T
ABLE OF CONTENTS
1. Scope ....................................................................................................1
RODUCT OVERVIEW .....................................................................................1
1.1 P
OCUMENT OVERVIEW...................................................................................1
1.2 D
2. Technical Description..........................................................................2
RINCIPLES OF OPERATION............................................................................2
2.1 P
2.1.1 Hydrocarbon fire detection....................................................................2
2.1.2 Identifying the CO
peak.......................................................................2
2
2.1.3 The limitations of IR-IR flame detectors................................................2
2.1.4 The advantages of IR3 technology .......................................................2
3. Performance .........................................................................................5
ETECTION SENSITIVITY.................................................................................5
3.1 D
ONE OF VISION ...........................................................................................7
3.2 C
ALSE ALARMS PREVENTION ..........................................................................8
3.3 F
4. Operation..............................................................................................9
ISUAL INDICATIONS ...................................................................................... 9
4.1 V
4.2 O
UTPUT SIGNALS ........................................................................................10
4.2.1 Optional latching.................................................................................11
4.2.2 Built-In-Test (BIT) ...............................................................................11
4.2.3 Accessory Relay as EOL....................................................................11
MODE SELECTION ........................................................................................11
4.3
4.3.1 Function switch (SW1):.......................................................................12
4.3.2 Address switch (SW2) (Optional):.......................................................13
4.3.3 Alarm Delay switch (SW3):.................................................................14
UILT IN TEST ............................................................................................. 15
4.4 B
5.Technical Specifications.....................................................................18
LECTRICAL SPECIFICATIONS .......................................................................18
5.1 E
ECHANICAL SPECIFICATIONS ......................................................................21
5.2 M
NVIRONMENTAL SPECIFICATIONS.................................................................22
5.3 E
6. Installation Instructions.....................................................................23
COPE........................................................................................................23
6.1 S
6.2 G
ENERAL CONSIDERATIONS ......................................................................... 23
REPARATIONS FOR INSTALLATION................................................................24
6.3 P
ONDUIT INSTALLATION................................................................................24
6.4 C
6.5 D
ETECTOR MOUNTING .................................................................................25
6.5.1 Swivel Mount Kit:.... ... .. .. .. .. .. ... .. .. .. .. .. ... .......................... .. .. .. .. ... .. .. .. ....25
6.5.2 Swivel installation (Figs. No. 8 and 9):................................................25
6.6 W
6.7 T
6.8 M
IRING (REFER TO FIG. 12) .........................................................................28
ERMINAL WIRING (SEE FIG. NO.10 AND NO.11.)...........................................29
ODE SELECTION........................................................................................33
7. Operating Instructions......................................................................34
COPE........................................................................................................34
7.1 S
7.2 P
OWER-UP .................................................................................................34
ESET ........................................................................................................34
7.3 R
UNCTIONAL TESTING................................................................................... 34
7.4 F
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IR3 Flame Detector Manual – TM 20/20I, Rev. (6) August 2004
7.4.1 Manual BIT Test .................................................................................35
7.4.2 Testing with fire simulator...................................................................35
7.5 S
AFETY PRECAUTIONS ................................................................................. 36
8. Maintenance Instructions..................................................................37
COPE........................................................................................................37
8.1 S
AINTENANCE INSTRUMENTATION AND PERSONNEL .......................................37
8.2 M
8.3 P
REVENTIVE MAINTENANCE PROCEDURES.....................................................37
ERIODIC MAINTENANCE PROCEDURES.........................................................37
8.4 P
8.4.1 Power-Up Procedure ..........................................................................37
8.4.2 Functional Test Procedure..................................................................37
AINTENANCE RECORDS..............................................................................38
8.5 M
ROUBLESHOOTING .....................................................................................38
8.6 T
8.6.1 Fault Indication ...................................................................................38
8.6.2 False Alarm or Warning Indication......................................................38
Appendix A - Wire Selection Tables..................................................... 39
Appendix B – Typical Wiring Configurations.......................................41
Appendix C – RS-485 Communication Network ..................................45
Appendix D - Mounting the “EExde approved” version......................47
Appendix E - Long Range IR3 Fire Simulator. .....................................51
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IR3 Flame Detector Manual – TM 20/20I, Rev. (6) August 2004
L
IST OF FIGURES
Figure 1: IR3 Flame Detector............................................................................................3
Figure 2: Flame Detector Assembly - Outline Drawing ....................................................4
Figure 3: Horizontal and Vertical Fields of View................................................ ..... ..... ... .7
Figure 4: Indication LEDs.............................................................................. ....................9
Figure 5: Switch Locations................................... ..... ... ..... ..... ... ..... ...... .. ...... ..... ... ..... ..... ..15
Figure 6: Electrical Interface............... ..... ... ..... ..... ... ..... ...... .. ...... ..... ..... ... ..... ...... .. ...... ....19
Figure 7: Flame Detector Assembly - Schematic Section ............................ .. ... ............... 20
Figure 8: IR3 Detector and Swivel Mount Assembly.................... .. ..................................26
Figure 9: Swivel Mount Assembly - Outline Drawing......................................................27
Figure 10: Terminal Board........................................ ..... ...... .. ...... ..... ... ..... ..... ... ..... ... ..... ..30
Figure 11: Flame Detector Assembly - Wiring Diagram.................................................31
Figure 12: IR3 Flame Detector with cover removed........................................................32
Figure 13: Flame Detector Wiring Diagram..................... ..... ...... .. ...... ..... ... ..... ..... ... ..... ..41
Figure 14: Typical wiring diagram for 4 wire controllers..................................... ... ....... 42
Figure 15: Typical wiring diagram for controllers with alarm & fault loops ..................43
Figure 16: 4-20mA wiring.............................. ...... .. ...... ..... ... ..... ..... ... ..... ... ..... ...... .. ...... ....44
Figure 17: RS-485 networking...................... ..... ... ..... ..... ... ..... ...... .. ...... ..... ... ..... ..... ... ..... ..45
Figure 18: Flame Detector Assembly - Wiring Diagram.................................................49
Figure 19: OPTION A Flame Detector Assembly - Wiring Diagram (“de version”).....50
Figure 20: OPTION B Flame Detector Assembly - Wiring Diagram (“de version”).....50
Figure 21: Fire Simulator............................................................................................... ..51
Figure 22: IR3 Detector Target Point.................. ............................................................52
IST OF TABLES
L
Table 1: Alarm Response Time Versus Range.................................................................... 5
Table 2: Response Sensitivity Ranges........................................................... .. ....................6
Table 3: Immunity To False Alarm Sources.......................................................................8
Table 4: Welding Immunity Distance ..................................................... ... .........................8
Table 5: Output Signals Versus Detector State ................................................................10
Table 6: Function Switch SW1........................................ ... ................................... ............ 12
Table 7: Sensitivity range ............................................. .. ................................... ... ............ 12
Table 8: Address Switches SW2................................. ................................... ....................13
Table 9: SW2 Address Setting............................................... .................................. .......... 13
Table 10: SW3 Alarm Delay Setting.......... ................................... .................................. ..14
Table 11: Contact Ratings...................... ................................... ................................... .... 20
Table 12: Mounting according to US Version................................ ... ...............................25
Table 13: Mounting according to EU Version ....................................................... .......... 25
Table 14: Maximum DC resistance at 68˚F for copper wire............................................39
Table 15. Wiring length in feet (meter)...................................................................... ....... 39
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IR3 Flame Detector Manual – TM 20/20I, Rev. (6) August 2004
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
1. Scope
1.1 Product Overview
The Spectrex Model 20/20I is a triple IR spectrum flame detector designed to
provide maximum fire protection. It uses innovative technology of advanced digital
signal processing to analyze the dynamic characteristics of fire. Three sensitive IR
channels process the signals. Detection performance is controlled by a
microprocessor and easily adapted to all environments, applications and
requirements. The result is a unique and superior flame detector, which provides
excellent detection sensitivity with extreme immunity to false alarm.
1.2 Document Overview
This manual describes the detector and its features and provides instructions on
the installation, operation and maintenance.
This manual is divided into separate chapters as follows:
Chapter 1. Scope - a general introduction and overview of the product and the
Manual, with a brief description of its content.
Chapter 2. Technical Description - the detector’s theory of operation.
Chapter 3. Performance - the detector features and capabilities.
Chapter 4.
Chapter 5. Technical Specifications - the Detector’s electrical, mechanical and
Chapter 6. Installation Instructions, including wiring and mode setting.
Chapter 7. Operating Instructions and power-up procedures.
Chapter 8. Maintenance Instructions and support procedures.
Appendix A. Wiring Selection Tables for electrical wire selection according
Appendix B. Typical Wiring Configurations - wiring diagrams for
Appendix C. RS-485 Communication Network
Appendix D.
Appendix E. Long Range IR3 Fire Simulator
Operation
indications.
environmental specifications.
to installation configuration.
installation.
Mounting the “EExde approved” version
- the detector’s operation modes, user interface and
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
2. Technical Description
•
Detection Range: up to 200 ft (60m) for a 1ft x 1ft (0.3m x 0.3m) fire.
• Ultra High Immunity to False Alarms (see section. 3.3).
• Advanced Digital Processing of the Dynamic Characteristics of Fire:
Flickering, Threshold correlation and Ratio.
• Three Separate IR Channels: Between 3-5 microns.
•
Field Programmable Sensitivity: four ranges.
•
Two Response Levels: Warning & Detection.
• Solar Blind
•
Microprocessor Based
•
Built In Test: Manual and Automatic (see section. 4.2.2).
• Electrical Interface:
o Dry contact RELAYS.
Communication network RS-485.
o
4-20mA output.
o
• Certification: Approved by F.M, CSA, ATEX.
: Digital signal processing.
2.1 Principles Of Operation
2.1.1 Hydrocarbon fire detection
The triple IR flame detector detects all conceivable types of hydrocarbon fires, i.e.
any fire, which emits CO
2.1.2 Identifying the CO
The hydrocarbon fire is characterized by a typical radiation emission. The CO
.
2
peak
2
2
peak emits intense radiation in the spectral band between 4.2 µ - 4.5 µ and
weaker radiation intensity outside this spectral band.
2.1.3 The limitations of IR-IR flame detectors
in the atmosphere attenuates the radiation in this spectral band. (Absorption
CO
2
and emission of radiation always occur in the same band.) As a result, the greater
the distance between the detector and the fire, the weaker the intensity of the
radiation reaching the detector (the CO
attenuation increases). This phenomenon
2
explains the limitations of the existing IR-IR flame detectors in the market:
• Detection distance is restricted to 33ft (10m) only.
•
Their immunity to false alarm sources is limited.
2.1.4 The advantages of IR3 technology
To overcome these limitations, Spectrex Inc. revised an innovative concept of
utilizing an additional detection channel. Three channels collect more data from
the environment, permitting more accurate analysis and better performance.
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
After careful investigation, three channels were selected which, when operating
jointly, provide optimal fire detection characteristics:
Channel 1: 4.2 µ - 4.6 µ
Fire - the CO
peak
2
Channel 2: 4.0 µ - 4.2 µ
Eliminates false alarms from high temperature sources.
Channel 3: 4.8 µ - 5.2 µ
Eliminates false alarms from flickering of background radiation.
Most IR sources, which create misleading IR alarm stimuli, including the sun,
incandescent and halogen lamps, electric arc discharges, electrical heaters, etc.,
do not possess this unique spectral signature of fire. The IR sensors of the
detector respond only to flickering of radiation signals. The signals are compared
to a predetermined threshold. Processing of the results from the three IR channels
is performed by the board microprocessor. The result is a much greater detection
distance and a highly increased ability to distinguish between fire and false alarms.
This sophisticated technology surpasses all other existing flame detection
techniques on the market today.
This unique flame analysis capability (patent pending) has been
incorporated into the Triple-IR fire detector manufactured by Spectrex, Inc.
The result is a unique flame detector, which does not produce false alarms
and provides at the same time detection over greatly increased distances.
Figure 1: IR3 Flame Detector
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
Figure 2: Flame Detector Assembly - Outline Drawing
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
3. Performance
3.1 Detection Sensitivity
Detection sensitivity is the maximum distance at which the detector will reliably
detect a specific size of fire & typical type of fuel (standard fire).
Standard Fire:
A 1ft x 1ft (0.3m x 0.3m) Gasoline pan fire with max. wind speed of 6.5 ft/sec
(2 m/sec).
Sensitivity Ranges:
The detector has four user selectable sensitivity ranges. For each range there are
two response levels.
1. WARNING (Pre-alarm)
2. ALARM
The detection distance, for the WARNING level, is approximately 10% higher than
the ALARM distance. Alarm response times for a “standard fire” at a specified
range are shown hereunder.
Table 1: Alarm Response Time Versus Range
Sensitivity 1 2 3 4
Range – ft (m) 50 (15) 100 (30) 150 (45) 200 (60)
Response Time (sec) 3 5 8 10
For some typical ambient conditions the Zeta parameter as defined in NFPA 72 for
the detector is 0.005 (1/meter).
Note:
Zeta parameters may vary significantly with changes in temp, air pressure,
humidity, visibility conditions, etc.
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
Other fuels
The detector will react to other types of fires as follows:
Pan Fire Size: 1ft x 1ft (0.3m x 0.3m)
Maximum Wind Speed: 6.5 ft/sec (2 m/sec)
Maximum Response Time: 10 sec
Table 2: Response Sensitivity Ranges
Type Of Fuel % Of Max. Distance at
Each Sensitivity Range
Gasoline 100%
N-Heptane 100%
Alcohol 95% 75%
JP4 75%
Kerosene 75%
Diesel Fuel 70%
Methane* 30%
Propane* 30%
* 0.5m plume fire
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
3.2 Cone Of Vision
Horizontal: 90°
Vertical: 90°
Figure 3: Horizontal and Vertical Fields of View
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
3.3 False Alarms Prevention
The detector will not provide an alarm or a warning signal as a reaction to the
radiation sources specified below.
Notes:
IAD = Immune at Any Distance.
All sources are chopped from 0 to 20Hz.
Table 3: Immunity To False Alarm Sources
Radiation Source Immunity
Distance ft(m)
Sunlight IAD
Indirect or reflected sunlight IAD
Vehicle headlights (low beam) conforming to MS53023-1 IAD
Vehicle IR lights (low beam) conforming to MS53024-1 IAD
Incandescent frosted glass light, 100 W IAD
Incandescent clear glass light, rough service, 100 W IAD
Fluorescent light with white enamel reflector, standard office or
IAD
shop, 40 W (or two 20 W)
Electric arc [12mm (15/32 in) gap at 4000 V alternating current,
IAD
60 Hz]
Arc welding [4 mm (5/32 in) rod; 240 A] See Table 4
Ambient light extremes (darkness to bright light with snow, water,
IAD
rain, desert glare and fog)
Bright colored clothing, including red and safety orange. IAD
Electronic flash (180 watt-seconds minimum output) IAD
Movie light, 625 W quartz DWY lamp (Sylvania S.G.-55 or
6.5 (2)
equivalent)
Red dome light conforming to MS51073-1 IAD
Blue-green dome light conforming to M251073-1 IAD
Flashlight (MX 991/U) IAD
Radiation heater, 1500 W IAD
Radiation heater, 1000 W with fan IAD
Quartz lamp (1000 W) 10 (3)
Mercury vapor lamp IAD
Grinding metal IAD
Lit cigar 1 (0.3)
Lit cigarette 1 (0.3)
Match, wood, stick including flare up 10 (3)
Table 4: Welding Immunity Distance
SW setting Detection Range Immunity Distance
1 50 ft (15m) >13 ft (4m)
2 100 ft (30m) >20 ft (6m)
3 150 ft (45m) >30 ft (9m)
4 200 ft (60m) >40 ft (12m)
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
4. Operation
4.1 Visual Indications
Two LED-indications are located in the detector front window:
i. Power LED (Yellow)
Normal - LED ON
BIT failure - LED blinks (4 Hz)
ii. Alarm LED (Red)
Normal - LED OFF
Warning - LED blinks (2 Hz)
ALARM - LED ON
Figure 4: Indication LEDs
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
4.2 Output Signals
The detector controls the following outputs:
•
Alarm relay
• Accessory relay
• Fault relay
•
4-20mA current output
•
RS-485 communication
The detector can be in one of the following states.
Normal: The detector is functioning normally.
BIT: The detector performs a Built-In-Test.
Warning: Fire detected - changed to warning – pre-alarm state.
Alarm: Fire detected - changed to fire alarm state.
Latched Alarm
(Optional)
The alarm outputs are latched due to the detection of a fire that
has already been extinguished.
Fault: A fault is detected during a BIT sequence or the power supply is
too low. In each state the detector will activate different outputs
as specified in table 5.
Table 5: Output Signals Versus Detector State
Detector
State
Normal
Warning Sw1-2 ON On Blink
SW1 Power
Led
Alarm
Led
Alarm
Relay
Accessory
Relay
Fault
Relay
4-20mA
Output
On Off Off Off On 5mA
Off On On 10mA
2Hz
Alarm On On On On On 15mA
Latch Sw1-1 ON On Off On Off On 5mA
Fault Blink
Off Off Off Off 0mA
4Hz
• The detector will be in its FAULT state until it has passed a successful BIT.
•
When SW1-2 is OFF, WARNING state is the same as the ALARM state.
• The alarm outputs will be activated as long as the alarm conditions are present
and will stop approximately 5 seconds after the fire is no longer detected.
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
4.2.1 Optional latching
The detector includes a latched alarm output capability, which operates according
to the DIPswitch SW1-1 position. Upon the detection of a fire, the detection signal
is latched until manually reset (disconnecting the power supply or performing a
manual BIT).
4.2.2 Built-In-Test (BIT)
Successful Manual BIT
will activate the following outputs according to SW1
switches.
SW 1-4 ON The ALARM relay will be activated for 3 seconds.
The 4-20mA output will provide 15mA for 3 sec.
SW 1-5 ON & SW 1-4 ON The ACCESSORY & ALARM relays will be
activated for 3 sec.
The 4-20mA output will provide 15mA for 3 sec.
SW 1-5 ON & SW 1-4 OFF The ACCESSORY relay will be activated for
3 sec.
The 4-20mA output will provide 10mA for 3 sec.
4.2.3 Accessory Relay as EOL
When SW1-8 is ON then the accessory relay is used as End of Line relay. In this
case, the accessory relay is active as long as the detector is not in its FAULT
state.
: The detectors’ status is available through its RS-485 communication link.
Note
4.3 Mode Selection
The detector has 3 DIPswitches, which enable the user to adapt the detectors’
operation to specific applications:
• Function switch (SW1)
•
Address switch (SW2) – only if using the RS-485 Serial address
•
Alarm delay switch (SW3)
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
4.3.1 Function switch (SW1):
The user can select the desired mode of operation by means of this switch
according to table 6:
Table 6: Function Switch SW1
SW. ON Position OFF Position
1 Alarm latching - enabled Alarm latching – disabled (default)
2 Accessory relay activated at warning
level
Accessory relay activated at
detection level (together with Alarm
relay) -
(default)
3 Automatic & manual BIT (default) Manual BIT only
4 Successful manual BIT activates the
Alarm relay and the 4-20mA output
Successful manual BIT does not
activate the Alarm relay.
turns to 15mA for approximately 3
seconds (default)
5 Successful manual BIT activates the
accessory relay and the 4-20mA
Successful manual BIT does not
activate the Accessory relay.
output turns to 10mA for
approximately 3 seconds (default)
6* Sensitivity range – see table 7 below
Sensitivity range - see table 7
(default)
7* Sensitivity range - see table 7 below Sensitivity range - see table 7
(default)
8 Accessory relay used as End Of
Line.
Accessory relay operates in
accordance with the settings of
SW1(default)
* See Table 7 for sensitivity range setting.
Table 7: Sensitivity range
Sensitivity Range SW1-7 SW1-6
1 (lowest) 50 ft (15m) OFF OFF
2 100 ft (30m) OFF ON
3 150ft (45m) ON OFF
4 (highest) 200ft (60m) ON ON
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
4.3.2 Address switch (SW2) (Optional):
The address switch provides 64 alternative addresses that can be used with the
RS-485 communication link. See tables 8 and 9.
Table 8: Address Switches SW2
SWITCH Description
1 Address bit 0 (LSB)
2 Address bit 1
3 Address bit 2
4 Address bit 3
5 Address bit 4
6 Address bit 5 (MSB)
Legend:
0 = OFF
1 = ON
LSB = Least Significant Bit
MSB = Most Significant Bit.
SWITCH SW2-7 and SWITCH SW2-8 are unused.
Table 9: SW2 Address Setting
Address SW2-6 SW2-5 SW2-4 SW2-3 SW2-2 SW2-1
0 OFF OFF OFF OFF OFF OFF
1 OFF OFF OFF OFF OFF ON
2 OFF OFF OFF OFF ON OFF
3 OFF OFF OFF OFF ON ON
4 OFF OFF OFF ON OFF OFF
5 OFF OFF OFF ON OFF ON
. .
. .
. .
62 ON ON ON ON ON OFF
63 ON ON ON ON ON ON
Note: Default address = 0
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
4.3.3 Alarm Delay switch (SW3):
The detector is equipped with an Alarm Delay option, which provides
programmable time delays of 0 to 30 seconds with eight (8) fixed settings at: 0,
anti-flare, 3, 5, 10, 15, 20, and 30 seconds, using SW3 switches 1-3. See table 10.
When an Alarm (Detection) level condition is encountered, the detector delays the
execution of the Alarm output relay by the specified period of time. The detector
will then evaluate the condition for 3 seconds. If the Alarm level is still present, the
Alarm output will be activated. If this condition no longer exists, the detector will
return to its standby state. The Alarm delay option will affect the output relay and
the 4-20mA output but not the alarm LED.
Table 10: SW3 Alarm Delay Setting
SW3 switches Delay (seconds)
4 3 2 1
0 --- OFF OFF OFF
Anti Flare (default) --- OFF OFF ON
3 --- OFF ON OFF
5 --- OFF ON ON
10 --- ON OFF OFF
15 --- ON OFF ON
20 --- ON ON OFF
30 --- ON ON ON
Note: The new FM approval from January 2003 does not allow using 20 and 30
second delay.
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
ANTI FLARE
Anti Flare mode is selected to prevent false alarm in locations where fast flares
may be present. The Time delay for fire alarm in this mode is from 2.5 to 15
seconds (mostly less than 10 seconds).
Figure 5: Switch Locations
4.4 Built In Test
A. General
The detectors’ Built In Test (BIT) checks the following:
• Electronics circuitry
• Sensors
•
Window cleanness
The detector is set by default to perform the BIT automatically and manually
(SW1-3 = ON) or can be manually only (set SW1-3 = OFF).
An Automatic BIT will regularly check the detector and warn of a problem by
operating the Fault relay (and setting the mA output to 0mA). Also, the Power LED
will Blink. The manual BIT allows testing of unit at commissioning stage or as
required and will act in a similar manner to Auto BIT except that alarm/accessory
relay operation can also be tested (if appropriate SW1 switches selected)
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
B. Principles
If the result of a BIT is the same
as the detector’s current status (NORMAL or
FAULT), the detector's status will not change.
If the result of a BIT differs
from the detector’s current status, then a second BIT is
executed after a delay of 0.5 seconds.
If the result of the second BIT is the same as the previous BIT (and still differs
from the current status), the detectors’ status will be changed. (From NORMAL to
FAULT or from FAULT to NORMAL).
Note: When in FAULT status the detector disables its outputs.
C. Manual BIT only (SW1-3 = OFF)
The BIT is initiated manually by momentarily connecting Terminal No. 3 with
Terminal No. 2. A
Successful manual BIT activates the following:
•
FAULT relay is closed.(normal)
• ALARM relay is activated for 3 sec (SW1-4 = ON)
• ACCESSORY relay is activated for 3 sec (SW1-5 = ON)
•
4-20mA OUTPUT current will be 15mA when SW1-4 = ON
or 10mA when SW1-5 = ON & SW1-4 = OFF.
Unsuccessful BIT activates the following:
• FAULT relay is released. (Operated)
• 4-20mA output indicates FAULT condition (0mA).
•
POWER LED (yellow) blinks (4 Hz).
Important Note!
If SW1 switches 4 or 5 are in their "ON" position the ALARM and ACCESSORY
relays will be activated during a MANUAL BIT, therefore, automatic extinguishing
systems or any external devices, that should not be activated during BIT, should
be disconnected.
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
D. Automatic & Manual BIT (SW1-3 = ON)
Manual Bit
Functions as described in Para. 4.4.c. In the case of an unsuccessful BIT all
outputs will function as described in para. 4.4.c, but the BIT will be automatically
executed every 1-minute. This mode of operation will continue until two
consecutive successful BIT's that have been encountered. As a result, the
detector will resume its normal operation.
Automatic BIT
The detector automatically performs a BIT every 15 minutes.
A successful BIT sequence does not activate any indication:
•
The FAULT relay
• The POWER LED
is CLOSED (NORMAL).
is ON (NORMAL).
An unsuccessful BIT sequence activates the following:
• The FAULT relay
•
4-20mA output
•
The POWER LED (yellow)
• BIT procedure
is opened.
indicate FAULT (0mA).
blinks (4 Hz).
will be performed every 1 minute.
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
5.Technical Specifications
5.1 Electrical Specifications
A. Operating Voltage: 18-32 VDC
B.
Power Consumption
Max. 150mA in Stand-by
Max. 200mA in Alarm
C. Electric input protection: The input circuit is protected against voltage-
reversed polarity, voltage transients, surges and spikes according to MILSTD-1275A.
:
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
D. Electrical Interface:
Figure 6: Electrical Interface
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
E. Electrical outputs
• Dry Contact Relays:
Table 11: Contact Ratings
Relay
Name
Type Normal
position
Maximum Ratings
Alarm SPDT N.O. N.C. 2A at 30VDC or 0.5A at 250 VAC
Accessory SPST N.O. 5A at 30VDC or 250 VAC
Fault SPST N.C. 5A at 30VDC or 250 VAC
• 4-20mA Current Output:
Terminals 11 and 12:
FAULT < 2mA (Typical 0)
NORMAL 4 - 6mA ( 5)
WARNING 9 - 11mA (10)
ALARM 14 –16mA (15)
• Communication Network:
The detector is equipped with an RS-485 communication link that can
be used in installations with computerized controllers.
Figure 7: Flame Detector Assembly - Schematic Section
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
5.2 Mechanical Specifications
A. Enclosure
Aluminum: Chromate coating and Epoxy enamel finish
or
Stainless Steel 316: Electrochemical passivation coating
B. Explosion proof
FM approval Class I Div. 1 Groups B, C and D;
Class II Div. 1 Groups E, F and G.
ATEX
Ex II 2G SIRA 00ATEX 1163, 1164
EExd IIB + H
T5 Temp. -40°F (-40 °C) to 160°F (70 °C)
2
Option: -40°F (-40 °C) to 185°F (85 °C)
Per EN 50014 & EN 50018
EExde IIB + H
T5 Temp. -40°F (-40 °C) to 160°F (70 °C)
2
Per EN 50014, 50018 & 50019
(see Appendix D)
CSA approval Class I Groups B, C and D;
Class II Groups E, F and G.
C. Water and dust tight
NEMA 250 type 6p.
IP 66 and IP 67 per EN 60529
D. Electronic Modules
Conformable coating.
E. Electrical connection (two positions)
Standard 3/4"-14NPT conduit or M25 (ISO).
Optional M25 x 1.5 (ISO).
F. Dimensions
Base: 5.2 x 5.2 in (132 cm x 132 cm)
Height: 4.7 in (120 cm)
G. Weight
8.1 lbs. (3.7 Kg) – Aluminum Alloy
14.3 lbs. (6.5 Kg) – ST.ST 316
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
5.3 Environmental Specifications
A. High Temperature
Design to meet MIL-STD-810C, method 501.1 procedure II
Operating temperature: +160 °F (+70 °C)
Optional operating
+185 °F (+85 °C)
temperature:
Storage temperature: +185 °F (+85 °C)
B. Low Temperature
Design to meet MIL-STD-810C, method 502.1, procedure I
Operating temperature: -40 °F (-40 °C)
Storage temperature: -65 °F (-55 °C)
C. Humidity
Design to meet MIL-STD-810C, method 507.1, procedure IV
Relative humidity of up to 95% for the operational temperature range.
D. Salt Fog
Design to meet MIL-STD-810C, method 509.1, procedure I
Exposure to a 5% Salt Solution Fog for 48 hours.
E. Dust
Design to meet MIL-STD-810C, method 510.1, procedure I
Exposure to a dust concentration of 0.3 frames/cubic ft. at a velocity of
1750 fpm, for 12 hours.
F. Vibration
Design to meet MIL-STD-810C, method 514.2, procedure VIII
Vibration at an acceleration of 1.1g within the frequency range of 5-30 Hz,
and an acceleration of 3g within the frequency range of 30-500 Hz.
G. Mechanical Shock
Design to meet MIL-STD-810C, method 516.2, procedure I
Mechanical Shock of 30g half-sin wave, for 11 msec.
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
6. Installation Instructions
6.1 Scope
The "Spectrex" Model 20/20I is a self-contained Optical Flame Detector, designed
to operate as a stand-alone unit directly connected to alarm systems or automatic
fire extinguishing systems. The detector can form part of a more complex system
where many detectors and other devices are integrated through a common control
unit. This chapter does not attempt to cover all of the standard practices and
codes of installation. Rather, it emphasizes specific points of consideration and
provides some general rules for qualified personnel. Wherever applicable, special
safety precautions are stressed.
6.2 General Considerations
Very Important
The detector should be aimed toward the center of the detection zone and
have a completely unobstructed view of the protected area. Whenever
possible, the detector face should be tilted down at a slight angle to prevent
the accumulation of dust and dirt. Do not start an installation unless all
conceivable considerations regarding detector location have been taken into
account.
To ensure optimal performance and an efficient installation, the following
guidelines should be considered:
A. Sensitivity
To determine the level of sensitivity (SW1), the following issues should be
considered:
• Size of fire at determined distance to be detected.
•
Type of flammable materials.
B. Spacing and Location
The number of detectors and their locations in the protected area are
affected by:
•
Size of the protected area
• Sensitivity of the detectors
• Obstructed lines of sight
•
Cone of view of the detectors
C. Environment
• Dust, snow or rain can reduce the detectors sensitivity and require
more maintenance activities.
• The presence of high intensity flickering of IR sources may affect
sensitivity.
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
6.3 Preparations for Installation
Installation should comply with NFPA 72E, as applicable to flame detectors. The
detectors can be installed with the use of general-purpose common tools and
equipment.
1 Verify the appropriate Purchase Order. Record the Part No. and the Serial No.
of the detectors and the installation date in the appropriate Log-book.
2 Open the container package prior to detector installation and visually inspect
the detector.
3 Verify that all components required for the detector installation are readily
available before commencing the installation. In case that the installation is
not completed in a single session, secure and seal detectors and conduits.
4 For wiring, use color-coded conductors or suitable wire markings or labels.
12 to 20 AWG wires may be used for site wiring. The selection of wire gauge
should be based on the number of detectors used on the same line and the
distance from the control unit, in compliance with specifications
(See Appendix A).
6.4 Conduit Installation
1 To avoid water condensation water in the detector, it should be installed with
the conduits placed downward, and should include drain holes.
2 When using the optional swivel mount, use flexible conduits for the last portion
connecting to the detector.
3 For installations in atmospheres as defined in group B of the NFPA 72E,
conduits inlets should be sealed.
4 When pulling the cables through the conduits, ensure that they are not tangled
or stressed. Extend the cables about 12 in. (30 cm.) beyond the detector
location to accommodate wiring after installation.
5 After the conductor cables have been pulled through the conduits, perform a
continuity test.
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
6.5 Detector Mounting
The detector may be mounted on a simple fabricated bracket, or preferably the
optional Swivel Mount, Model 20/20-003. The Swivel Mount enables the detector
to be rotated up to 40 degrees in all directions.
6.5.1 Swivel Mount Kit:
Table 12: Mounting according to US Version
Item Qty. Type/Model Location
Swivel Mount 1 20/20-003
1/4"-20UNC Screw 4 1/4" –20UNC Detector - Holding plate
1/4" Spring Washer 4 1/4" Detector - Holding plate
Table 13: Mounting according to EU Version
Item Qty. Type/Model Location
Swivel Mount 1 20/20-003-1
Screw 4 M6 X 1P Detector - Holding plate
Spring Washer 4 M6 Detector - Holding plate
6.5.2 Swivel installation (Figs. No. 8 and 9):
1 Place the swivel mount (item 6) in its designated location and secure it with
four (4) M6 or 1/4" screws (item 11) (recommended), placed 3.0 in. (76.2 mm.)
apart on the swivel mount plate (item 10).
Note: Skip this step if the Swivel Mount is already installed. Also detector
removal for maintenance purpose does not require Swivel Mount removal.
2 Unpack the detector.
3 Place the detector, with its conduit inlets pointing down, on the holding plate of
the swivel mount (item 7). Secure the detector by four (4) 1/4"-20UNC (or M6)
screws with 1/4" (or M6) spring washers from the Swivel Mount Kit (using the
holes (item 5)). Use 3/16 Hex Key for 1/4" screws and No. 5 for M6 screws.
4 Tighten the three locking 3/8"-24UNF screws (item 8) of the swivel mount ring
until the friction in the ball joint holds the detector in its position, maintaining
the ability to be moved by hand-applied force (Use 3/16" HEX KEY).
5 Point the detector towards the protected area and make certain that the view
of the area. Secure the detector in that position by tightening the locking
screws (item 8) of the swivel mount ring.
The detector is now correctly located and aligned and ready for connecting to the
system.
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
Figure 8: IR3 Detector and Swivel Mount Assembly
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
Description
1 Protective Set
Screws
2 Ground Terminal
(for ATEX) or
Ground Thread
(for FM)
3 Back Cover
4 Housing
5 Swivel Mount
Screw Hole
6 Swivel Mount
7 Holding Plate
8 Locking Screws
9 Detector
Mounting
Screws
10 Swivel Mount
Plate
11 Swivel mounting
screws
Figure 9: Swivel Mount Assembly - Outline Drawing
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
6.6 Wiring (Refer to Fig. 12)
1 Disconnect power.
2 Remove the four (4) protective set-screws from detector front. (Fig. 8 Item 1)
3 Release the four (4) socket-head screws that secure the detector housing
(Item 1) to its back cover (Item 5) Using HEX KEY No. 5. Hold the housing
(Item 1) during the removal of the screws. With the screws removed, pull the
detector housing (Item 1) from its cover (Item 5). The cover remains attached
to the detector mount, the housing slides under the cover and remains
attached to it by a securing cable (Item 2). The Terminal Board inside the
detector cover is now revealed.
4 Remove the protective plug mounted on the detector conduit inlet, pull the
wires through the detector cover (Item 5) and secure them firmly to the cover
using the cable-clamp (Item 3) attached to it. Use a 3/4"-14NPT or M25x1.5
explosion-proof conduit connection to assemble the conduit to the detector.
5 Connect the wires to the required terminals (Item 4) according to the wiring
diagram. See paragraph 6.7 and figures no. 10 and no. 11.
6 Connect the grounding wire to the ground screw outside the detector cover
(Fig. 8 item 2).
The detector must be well grounded to Earth Ground for proper
operation.
7 Verify the wiring. Improper wiring may damage the detector.
8 Check the wires for secure mechanical connection and press them neatly
against the terminal board to prevent them from interfering while closing the
detectors’ housing.
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
6.7 Terminal wiring (See Fig. No.10 and No.11.)
The detector contains a Terminal Board consisting of two (2) terminal blocks (Item
4). The left terminal block is labeled 1 to 7, the right terminal block is labeled 8 to
14.
The following describes the function of each electrical terminal of the
detector:
• Power Supply (Terminal Numbers 1, 2):
Input power is supplied to Terminal No. 1.
The RETURN is connected to Terminal No. 2.
• Manual Bit Activation (Terminal No. 3):
Terminal No. 3 is used for the Manual BIT activation. The manual BIT is
initiated by a momentary connection of Terminal No. 3 to the power supply
Return line.
Fault Relay (Terminal Numbers 4, 5):
The Fault output is N.O. SPST relay at Terminals No. 4 and 5. The contacts
are closed when the detector is in its normal operational condition.
• Alarm Relay (Terminal Numbers 6, 7, 8):
The Alarm output is a change over contact relay (SPDT).
Terminal No. 6 is the N.O. relay contact.
Terminal No. 7 is the COMMON relay contact.
Terminal No. 8 is the N.C. relay contact.
•
Accessory Relay (Terminal Numbers 9, 10):
The Accessory output is N.O. SPST relay at Terminals No. 9 and 10.
The Accessory relay may act in parallel with the ALARM relay to activate
another external device or it may provide a warning signal, depending on the
position of SW1-2.
Note
To protect the dry contacts from voltage surges when connected to reactive
loads (electric motors, sirens, etc.) connect an appropriate varistor over these
contacts.
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
•
4-20mA Output
(Terminal Numbers 11, 12):
Terminal Numbers 11 and 12 are used for analog, 4-20mA current output as
specified in paragraph 4.e
Terminal No. 11 is used as output Terminal.
Terminal No. 12 is used as input Terminal (see appendix B for more details)
• RS-485 (Terminal Numbers 13, 14):
Terminal Numbers 13 and 14 are used for communication network as specified
in appendix C.
Terminal No. 13 is the positive (+) lead.
Terminal No. 14 is the negative (-) lead.
Figure 10: Terminal Board
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
Figure 11: Flame Detector Assembly - Wiring Diagram
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
Description
1 Housing
2 Securing Cable
3 Cable Clamp
4 Terminal Board
5 Back Cover
6 Inlet Conduit
7 DIP Switch1
8 DIP Switch2
9 DIP Switch3
Figure 12: IR3 Flame Detector with cover removed
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
6.8 Mode Selection
When wiring is completed the operational mode can be selected.
Mode selection is achieved by means of 3 DIPswitches listed below:
SW1 - Function switch – Fig. 12 Item 7 (see table 6)
SW2 - Address switch – Fig. 12 Item 8 (see table 9)
SW3 - Alarm Delay switch – Fig. 12 Item 9 (see table 10)
Function Switch (SW1):
Modes of operation are selected by DIPswitch (SW1) (Item 7) according to the
selection table in paragraph 4.3.1.
Address Switch (SW2):
The detector has the capability of acting as an addressable device.
The address switch (Item 8) provides 64 addresses, which can be used by the RS485 communications link as described in paragraph 4.3.2.
Alarm Delay Switch (SW3):
An Alarm Delay may be required for certain applications. The detector has an
Alarm Delay switch (SW3) (Item 9), permitting time delays from 0 to 3, 5, 10, 15,
20 and 30 seconds respectively (See table 10).
1 Function Switch (SW1): Set all eight (8) switches of SW1 to their appropriate
settings (ON/OFF), to achieve the required functional mode (See paragraph
4.3.1).
2 Address Switch (SW2): Choose the address number from 0 to 63 for the
detector and set switches 1-6 according to the selection table at paragraph
4.3.2
Note: When a multi detector installation is used with RS-485 communication,
then each detector must have an individual address.
3 Alarm Signal Delay Switch (SW3): Set SW3 to the appropriate position to
achieve the required time delay. See paragraph 4.3.3.
4 Verify that the “O” Ring is in its groove in appropriate position on the back
cover.
• Close the detector
• Connect the housing to the cover using the alignment pin on the back
cover.
• Tighten the four (4) socket-head screws to secure the detector housing
to its back cover (tightening torque 1 Kg * M).
5 Install the four (4) set-screws that protect the socket-head screws.
The Detector is now wired, assembled and its operational mode properly set.
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
7. Operating Instructions
7.1 Scope
The following instructions are designed to obtain optimal performance from the
detector over its life cycle.
7.2 Power-Up
1 Apply power and wait approximately 60 seconds for the automatic self-test of
the detector.
Note: Applying power initiates the following sequence:( POWER LED blinks
BIT is executed, if successful then: POWER LED turns ON continuously
FAULT relay contacts close)
2 Wiring Inspection: If a short-circuit or line discontinuity exists, indications will
appear on the control unit display panel. Review your wiring.
3 The detector goes into its FAULT state when supply voltage drops under
16.5V. The detector status goes back to NORMAL, when the supply voltage is
above 17.5V.
4 Detector Inspection: Visually inspects the viewing window of the detector. It
should be clean and clear. The POWER LED should be ON and the ALARM
LED should be OFF. The ALARM and ACCESSORY relays should be OFF
and the FAULT relay should be ON. The 4-20mA Output should be 5mA.
5 If any of the outputs or indications are different from the description in step 4,
see paragraph 8.6.1 for troubleshooting.
The Flame Detector is now ready for Functional Testing.
7.3 Reset
To RESET a detector when in its ALARM state, disconnect power (terminal No. 1
or terminal No. 2), or initiate a manual BIT.
7.4 Functional testing
Following is a testing procedure for proper functioning of the detector. The
detector can be tested using the Manual Built-in-Test or the Spectrex IR3 Fire
Simulator - 20/20-310
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
7.4.1 Manual BIT Test
Important Note!
If SW1 switches 4 and 5 are in their “ON” position the Alarm, Accessory Relays
and 4-20mA Output will be activated during a manual BIT, therefore, automatic
extinguishing systems or any external devices that may be activated during BIT
must be disconnected.
1 Verify that the detector is operated properly.
2 Initiate manual BIT. After a few seconds the following occurs: Alarm Relay
will be activated and the 4-20mA output turns to 15mA for 3 seconds (only if
SW1-4 is ON). Accessory Relay will be activated and the 4-20mA output
turns to 10mA for 3 seconds (only if SW1-5 is ON). The 2 LEDs should be
ON. Fault Relay will stay active during the test.
7.4.2 Testing with fire simulator
This test is produced to simulate an exposure of the detector to a real fire
condition. The detector is exposed to the radiation in the specified detection level.
As a result the detector must generate a Fire Alarm signal.
Important Note!
If the detector is exposed to a fire simulator, the Alarm and Accessory Relays and
4-20mA will be activated during the simulation. Therefore, automatic extinguishing
systems or any external devices, which may be activated during this process,
must be disconnected.
1 Apply power to the system and wait up to 60 seconds for turning of the
detector to normal state. Power led turns on. If the detector is on, skip this
step.
2 Aim the Spectrex Fire Simulator Model 20/20-310 to the target point of the
detector (see Fig. 22), in a way that the radiation emitted by it is facing
directly towards the detector. (See appendix E)
3 Press the operation button once. After few seconds the Alarm LED should be
on for few seconds. The 4-20mA output should turn to 15mA for a few
seconds and then to return to 5mA. The Alarm Relay should also turn on to
this period. The Accessory Relay should respond in parallel to the Alarm
Relay if SW1-4 is OFF.
This completes the installation procedure. The detector and system are now ready
for operation.
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
7.5 Safety Precautions
After Powering-up, the detector requires hardly any attention in order to function
properly, but the following should be noted:
1 Follow the instructions in the manual and refer to the drawings and
specifications issued by the manufacturer.
2 Do not expose the detector to radiation of any kind unless required for testing
purposes.
3 Do not open the detector housing, while power is supplied.
4 Do not touch internal parts other than the three functional switches.
Interference with internal circuits may impair detector performance and will
invalidate manufacturer's Warranty.
5 Disconnect external devices, such as automatic extinguishing systems before
carrying out any maintenance.
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
8. Maintenance Instructions
8.1 Scope
This chapter deals with preventive maintenance, describes possible faults in
detector operation and indicates corrective measures. Ignoring these instructions
may cause problems with the detector and may invalidate the warranty. Whenever
a unit requires service, please contact the manufacturer or its authorized
distributor for assistance.
8.2 Maintenance Instrumentation and Personnel
The detectors’ maintenance requires ordinary tools and qualified personnel, who
should be familiar with local codes and practices.
8.3 Preventive Maintenance Procedures
The detector must be kept as clean as possible. The viewing window and the
reflector of the Model 20/20I Flame Detector must be cleaned on a periodic basis.
The frequency of cleaning operations depends upon the environmental conditions
and specific applications. The fire detection system designer will give his
recommendations. Use of the optional AIR SHIELD Model 20/20-920 is highly
recommended and will help to keep the window clean and prevent dirt from
accumulating on the window.
1 Disconnect power to the detector before proceeding with any maintenance
including lens cleaning.
2 To clean the detector viewing window and reflector use water and detergent,
rinse with clean water.
3 Where dust, dirt or moisture accumulates on the window, first clean with a soft
optical cloth and detergent, then rinse with clean water.
8.4 Periodic Maintenance Procedures
In addition to preventive cleaning and maintenance, the detector should be
functionally tested every six months. This test should also be carried out for any
reason the detector has been opened.
8.4.1 Power-Up Procedure
Perform Power-Up procedure every time power is restored to the system. Follow
the instructions in paragraph 7.2.
8.4.2 Functional Test Procedure
Perform a functional test of the detector as described in paragraph 7.4.
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
8.5 Maintenance Records
It is recommended to record maintenance operations performed on a detector in
the system Log-book. The record should include information, which identifies the
unit, the installation date, contractor, and entries for every maintenance operation
performed including the description of the operation, date and personnel ID. If a
unit is sent to the manufacturer or distributor for service, a copy of the
Maintenance records should accompany it.
8.6 Troubleshooting
8.6.1 Fault Indication
1 Check power supply for correct voltage, polarity and wiring.
2 Check detector window and reflector for cleanness. If necessary clean the
window as indicated in paragraph 8.3 and repeat the test.
3 Disconnect the power supply to the system and check the detector's internal
wiring.
4 Reconnect power supply and wait approximately 60 seconds. Repeat the test.
If the indication LED is still blinking, the unit requires service.
8.6.2 False Alarm or Warning Indication
1 Disconnect the power supply from the system and check internal wiring.
2 Reconnect power supply and wait approximately 60 seconds. If indication
remains, the unit requires service.
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
Appendix A - Wire Selection Tables
General Instructions For Electrical Wiring
1. Refer to Table 14 to determine the required wire gauge for general wiring,
such as relay wiring. Calculate the permitted voltage fall with respect to
loads current, wire gauge and length of wires.
2. Refer to Table 15 to select wire gauge for power supply wires. DO NOT
connect any circuit or load to detectors’ supply inputs.
Table 14: Maximum DC resistance at 68˚F for copper wire
AWG # mm2 Ohm per 100 ft. Ohm/100
meter
26 0.12 - 0.15 4.32 14.15
24 0.16 - 0.24 3.42 11.22
22 0.30 - 0.38 1.71 5.60
20 0.51 - 0.61 1.07 3.50
18 0.81 - 0.96 0.67 2.20
16 1.22 - 1.43 0.43 1.40
14 1.94 - 2.28 0.27 0.88
12 3.09 - 3.40 0.17 0.55
10 4.56 - 6.64 0.11 0.35
A. Select "Number of detectors" connected in one circuit.
B. Select "wiring length" per your installation requirements.
C. Refer to "power supply range" for voltage extreme applied.
Table 15. Wiring length in feet (meter)
No. of
Detectors
24 18 16 14 - - 22-32
20 18 16 14 - - 22-32
16 20 18 16 14 - 22-32
12 20 18 16 14 - 20-32
8 20 18 16 14 - 20-32
4 and less 20 18 16 16 14 20-32
Feet 164 328 492 656 820
(meter) (50) (100) (150) (200) (250)
Max. Length from Power Supply to Last
Recommended Wire Diameter Power Supply
Range (VDC)
Detector
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
Appendix B – Typical Wiring Configurations
Figure 13: Flame Detector Wiring Diagram
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
Figure 14: Typical wiring diagram for 4 wire controllers
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
Figure 15: Typical wiring diagram for controllers with alarm & fault loops
Notes:
1. For EOL Resistors Values See Controller Manual
2. The Accessory Relay in The Last Detector Should be Configured as an EOL
(Switch SW1-8 “ON”)
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
Figure 16: 4-20mA wiring
Notes:
The detectors are factory set to isolated 4-20mA sink version. To work at nonisolated 4-20mA version (source), connect Terminal 12 to Terminal 1. The 4-20mA
meter are connected between Terminal 11 and Terminal 2.
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
Appendix C – RS-485 Communication Network
Using the RS-485 network capability of the IR3 detector and additional software it
is possible to connect up to 32 detectors in an addressable system with 4 wires
only (2 for power & 2 for communication). Using repeaters, the number of
detectors can be much larger (32 detectors for each repeater) on the same 4
wires. When using the RS-485 network it is possible to read each detector status
(FAULT, WARNING, ALARM) and to initiate a BIT to each detector individually.
Fore more details, consult the factory.
Figure 17: RS-485 networking
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
Appendix D - Mounting the “EExde approved”
version
The EExde approved version provides an additional EExe terminal box attached
below the EExd detector and therefore allows easier access in hazardous areas
(see fig. 18). The unit is prewired to the terminals in the additional EExe terminal
section ready for field wiring connections
1. Detector Mounting
The detector may be mounted on a simple fabricated bracket, or preferably the
optional Swivel Mount, Model 20/20-003. The Swivel Mount enables the detector
to be rotated up to 40 degrees in all directions.
1.1 Swivel Mount Kit - Use the kit from the paragraph 6.5.1
1.2 Swivel installation
1 Refer to Fig.8 and Fig 9. Place the swivel mount (item 6) in its designated
location and secure it with four (4) M6 or 1/4" screws (item 11)
(recommended), placed 3.0 in. (76.2 mm.) apart on the swivel mount plate
(item 10).
Note: Skip this step if the Swivel Mount is already installed. Also detector
removal for maintenance purpose does not require Swivel Mount removal.
2 Unpack the detector.
3 Place the detector, with its conduit inlets pointing down, on the holding plate of
the swivel mount (Fig. 8 item 7). Secure the detector by four (4) M6 screws
with M6 spring washers from the Swivel Mount Kit using the holes (Fig. 9 item
5). You can use the thread on the modified cover (Fig. 18 item 1) marked
either triangle symbol (∆) or square symbol (ٱ). Use No. 5 Hex Key for M6
screws.
4 Tighten the three locking 3/8"-24UNF screws (Fig. 9 item 8) of the swivel
mount ring until the friction in the ball joint holds the detector in its position.
Yet, still permits it to be moved by hand-applied force (Use 3/16" HEX KEY).
5 Point the detector towards the protected area and make certain that the view
of the area. Secure the detector in that position by tightening the locking
screws (Fig.9 item 8) of the swivel mount ring.
The detector is now correctly located and aligned and ready for connecting to the
system.
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
2. W
IRING (R
EFER TO FIG
. 18.)
1 Disconnect power.
2 Release the four (4) slotted-head screws (item 3) that secure the chamber
cover (Item 2). The chamber is now revealed.
3 Remove the protective plug mounted on the detector conduit inlet, pull the
wires through the detector chamber (Item 7). Use a 3/4"-14NPT or M25x1.5
explosion-proof conduit connection to assemble the conduit to the detector.
4 Connect the wires to the required terminals (Item 4) according to the wiring
diagram. See paragraph 2.1 and figures no. 19 and no. 20.
5 Connect the grounding wire to the ground screw outside the detector cover
(Item 5).
The detector must be well grounded to Earth Ground for proper
operation.
6 Verify the wiring. Improper wiring may damage the detector.
7 Check the wires for secure mechanical connection and press them neatly
against the terminal to prevent them from interfering while closing the cover
(Item 2).
8 Place and secure the cover chamber (Item 2) using four (4) slotted-head
screws (Item 3).
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
Figure 18: Flame Detector Assembly - Wiring Diagram
Description
1. Modified Back Cover 5. Ground Terminal
2. EExe Chamber Cover 6. Mounting Thread
3. Slotted Screw 7. EExe Chamber
4. Terminal Block 8. Conduit Inlet
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
2.1 Terminal Wiring
The detector contains an EExe chamber consisting of a terminal block (Item 4).
The terminal block is labeled 1 to 6. (See Fig. No.18)
The following describes the function of each electrical terminal of the detector:
There are two options:
RS-485 & 4-20mA Version
Option A (See Fig. No. 19)
Power Supply
(Terminal Numbers 1, 2):
Input power is supplied to Terminal No. 1.
RETURN is connected to Terminal No. 2.
RS-485 (Terminal Numbers 3, 4):
Terminal Numbers 3 and 4 are used for
communication network as specified in
appendix C.
Terminal No. 3 is the positive (+) lead.
Terminal No. 4 is the negative (-) lead.
4-20mA Output (Terminal Numbers 5,
Terminal Numbers 5 and 6 are used for
6):
analog, 4-20mA current output as specified
in paragraph 5.e
Terminal No. 5 is used as output Terminal.
Terminal No. 6 is used as input Terminal.
(see appendix B for more details)
Alarm & Fault Relays Version
Option B (See Fig. No. 20)
Power Supply
(Terminal Numbers 1, 2):
Input power is supplied to Terminal No. 1.
RETURN is connected to Terminal No. 2.
Alarm Relay (Terminal Numbers 3, 4):
The Alarm output is a NO. SPST
contact at Terminal Numbers 3 and 4.
The contacts are closed at Alarm
Mode.
Fault Relay (Terminal Numbers 5, 6):
The Fault output is N.C. SPST contact
at Terminal Numbers 5 and 6. The
contacts are open at Fault condition.
Figure 19: OPTION A
Flame Detector Assembly - Wiring
Diagram (“de version”)
Figure 20: OPTION B
Flame Detector Assembly - Wiring
Diagram (“de version”)
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
Appendix E - Long Range IR3 Fire Simulator
Figure 21: Fire Simulator
Product Description
The SharpEye IR3 Long Range Fire simulator 20/20-310 is designed specifically
for use with the IR3 flame detectors. The Fire Simulator emits IR radiation in a
unique sequential pattern corresponding and recognizable by the IR3 detector as
fire. This allows the IR3 detectors to be tested under real fire conditions without
the associated risks of an open flame. There is a specially designed beam
collimator model number 20/20-190 used for extended range.
Unpacking
In addition to the delivery form, there should be the following contents:
•
Fire Simulator with built in batteries
• Battery charger
• Optional Beam Collimator
•
Storage Case
Operating Instructions
WARNING:
Do not open the Fire Simulator to charge the batteries or for any other reason in a
hazardous area.
CAUTION:
The following test will simulate a real fire condition and may activate the
extinguishing system or other alarms. If this is not desired, disconnect them
before the test and reconnect after the simulation.
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
Figure 22: IR3 Detector Target Point
Follow these instructions to simulate a fire:
1. Aim the Fire Simulator towards the detector’s “Target Point”.
2. For testing keep a distance of at least 20 inches (50cm) from the detector.
3. Press the operation button once. Fire simulation will last for 20 seconds.
The detector will send an alarm signal (solid red LED).
4. For another fire simulation a 20 second time lapse is required between
tests.
5. Make sure the optical window is clean and keep the Fire Simulator in a safe
place when not in use.
Battery Charging
The Fire Simulator uses NiCd batteries as a rechargeable power source. When
the batteries are fully charged it will operate for at least 60 uses without
recharging. An internal buzzer is sounded when the voltage from the batteries is
lower than the required operational level.
1. Place the Fire Simulator on a table in a safe area.
2. Turn the sealed plug (next to the operation button) counter-clockwise with a
suitable wrench.
3. Connect the battery charger.
4. Charge for a maximum of 14 hours.
5. Disconnect the charger.
6. Tighten the sealed plug clockwise.
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
Specifications
Mechanical
Explosion Proof Enclosure:
NFPA (designed to meet)
Class I, Division 1 & 2 Groups B, C and D
Class II, Division 1 & 2 Groups E, F, and G
ATEX EX II2G NEMKO 02ATEX255
EExd IIB T5 50˚C per En 50-014 & EN50-018
Electrical
Power: 8 VDC Max.
6 x Rechargeable 1.2 VDC NiCd Batteries
Current: 2.5A Avg.
Charge: 400mA for 14 Hours
Environmental
Temperature Range: -4º F (-20º C) to 122º F (50º C)
Vibration Protection: 1g (10-50hz)
Water and Dust: IP 67 per EN 60529
Physical
Dimension: 11.5 x 10.1 x 3.9 in (292 x 258 x 100 mm)
Weight: 7.5 lb. (3.4 Kg)
Range*
Sensitivity Range Standard Extended Range
1 (Low) 50 ft (15 m) 3.8 ft (1.2 m) 7 ft (2.2 m)
2 100 ft (30 m) 7 ft (2.2 m) 14.5 ft (4.5 m)
3 150 ft (45 m) 10 ft (3.2 m) 22 ft (7.0 m)
4 (High) 200 ft (60 m) 14.5 ft (4.5 m) 29 ft (9.0 m)
* The minimum distance from the detector is 20 inches (50cm)
* At extreme temperatures - 15% Max. Reduction in range
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Spectrex Inc. - SharpEyeTM IR3 Flame Detector Manual – TM 20 /20I, Rev. (6) August 2004
Technical Support
For all technical assistance or support, contact:
218 Little Falls Road
Cedar Grove, NJ 07009, USA
Tel: +1 (973) 239 8398
Fax: +1 (973) 239 7614
Email: spectrex@spectrex.net
Web-site: www.spectrex.net
Your Local Office:
SPECTREX INC.
Texas (USA)
Mr. Jay Cooley, Regional Sales Manager
16203 Park Row, Suite 150
Houston, Texas 77084
USA
Phone: +1 (832) 321 5229
Email: jay@spectrex.net
Europe
Mr. Ian Buchanan, Regional Manager
6 Applecross Road
Glasgow G66 3TJ
United Kingdom
Phone: +44 (0) 141 578 0693
Email: ian@spectrex.net
Far East
Mr. Deryk Walker, Regional Sales Manager
59 Fen Ji Hu, Danshui
Taipei County 25163
Taiwan (ROC)
Phone: +886 2 8626 2893
Mobile: +886 926 664 232
Email: deryk@spectrex.net
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