Spectrex SharpEye 20/20R Operating instructions

Single IR Flame Detector
Model 20/20R
User and Maintenance Manual
TM 20/20R, Rev. A January 2005
ATEX Approved
Ex II 2G
EExd IIB + H2T5
EExde IIB + H2T5
218 Little Falls Rd., Cedar Grove, NJ 07009 USA;
Phone: [phone] Fax: [phone]
Web -Site: www.spectrex-inc.com ; Email: [e-mail]

The SharpEye Optical Flame Detector described in this document istheproperty
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. -SharpEyeTM Single IR Flame Detector Manual–TM 20/20R, Rev. A January2005
I
TABLE OF CONTENTS
1. Scope...........................................................................................................................1
1.1 PRODUCT OVERVIEW...............................................................................................1
1.2 DOCUMENT OVERVIEW............................................................................................1
2. Technical Description...........................................................................................2
2.1 PRINCIPLE S OF OPERATION ....................................................................................2
3. Performance .............................................................................................................4
3.1 DETECTION SENSITIVITY ..........................................................................................4
3.2 CONE OF VISION......................................................................................................6
3.3 FALSE ALARMS PREVENTION...................................................................................7
4. Operation ...................................................................................................................8
4.1 VISUAL INDICATIONS.................................................................................................8
4.2 OUTPUT SIGNALS.....................................................................................................9
4.2.1 Optional latching...........................................................................................10
4.2.2 Built-In-Test (BIT).........................................................................................10
4.2.3 Accessory Relay as EOL ............................................................................10
4.3 MODE SELECTION ..................................................................................................10
4.3.1 Function switch (SW1):...............................................................................11
4.3.2 Address switch (SW2) (Optional):.............................................................12
4.3.3 Alarm Delay switch (SW3):.........................................................................13
4.4 BUILT IN TEST.........................................................................................................14
5.Technical Specifications....................................................................................17
5.1 ELECTRICAL SPECIFICATIONS ................................................................................17
5.2 MECHANICAL SPECIFICATIONS...............................................................................20
5.3 ENVIRONMENTAL SPECIFICATIONS ........................................................................21
6. Installation Instructions.....................................................................................22
6.1 SCOPE....................................................................................................................22
6.2 GENERAL CONSIDERATIONS ..................................................................................22
6.3PREPARATIONS FOR INSTALLATION .......................................................................23
6.4 CONDUIT INSTALLATION .........................................................................................23
6.5 DETECTOR MOUNTING...........................................................................................24
6.5.1 Swivel Mount Kit:..........................................................................................24
6.5.2 Swivel installation (Figs. No. 8 and 9):......................................................24
6.6 WIRING (REFER TO FIG. 12)..................................................................................27
6.7 TERMINAL WIRING (SEE FIG. NO.10 AND NO.11.)................................................28
6.8 MODE SELECTION ..................................................................................................32
7. Operating Instructions......................................................................................33
7.1 SCOPE....................................................................................................................33
7.2 POWER-UP.............................................................................................................33
7.3 RESET.....................................................................................................................33
7.4 FUNCTIONAL TESTING.............................................................................................33
7.4.1 Manual BIT Test...........................................................................................34
7.4.2 Testing with fire simulator...........................................................................34
7.5 SAFETY PRECAUTIONS...........................................................................................35
8. Maintenance Instructions..................................................................................36

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8.1 SCOPE....................................................................................................................36
8.2 MAINTENANCE INSTRUMENTATION AND PERSONNEL............................................36
8.3 PREVENTIVE MAINTENANCE PROCEDURES...........................................................36
8.4 PERIODIC MAINTENANCE PROCEDURES................................................................36
8.4.1 Power-Up Procedure...................................................................................36
8.4.2 Functional Test Procedure..........................................................................36
8.5 MAINTENANCE RECORDS.......................................................................................37
8.6 TROUBLESHOOTING................................................................................................37
8.6.1 Fault Indication.............................................................................................37
8.6.2 False Alarm or Warning Indication............................................................37
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 -IR Fire Simulator............................................................................51

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LIST OF FIGURES
Figure 1: IR Flame Detector .............................................................................................. 2
Figure 2: Flame Detector Assembly -Outline Drawing ....................................................3
Figure 3: Horizontal and Vertical Fields of View.............................................................. 6
Figure 4: Indication LEDs..................................................................................................8
Figure 5: Switch Locations............................................................................................... 14
Figure 6: Electrical Interface ........................................................................................... 18
Figure 7: Flame Detector Assembly -Schematic Section ................................................ 19
Figure 8: IR Detector and Swivel Mount Assembly.......................................................... 25
Figure 9: Swivel Mount Assembly -Outline Drawing...................................................... 26
Figure 10: Terminal Board............................................................................................... 29
Figure 11: Flame Detector Assembly -Wiring Diagram ................................................. 30
Figure 12: IR Flame Detector with cover removed.......................................................... 31
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: IR Detector Target Point ................................................................................ 52
LIST OF TABLES
Table 1: Alarm Response Time Versus Range....................................................................4
Table 2: Response Sensitivity Ranges.................................................................................5
Table 3: Immunity To False Alarm Sources ....................................................................... 7
Table 4: Output Signals Versus Detector State..................................................................9
Table 5: Function Switch SW1.......................................................................................... 11
Table 6: Sensitivity range .................................................................................................11
Table 7: Address Switches SW2 ........................................................................................ 12
Table 8: SW2 Address Setting........................................................................................... 12
Table 9: SW3 Alarm Delay Setting ................................................................................... 13
Table 10: Contact Ratings ................................................................................................ 19
Table 11: Mounting according to US Version.................................................................. 24
Table 12: Mounting according to EU Version .................................................................24
Table 13: Maximum DC resistance at 68F for copper wire............................................ 39
Table 14. Wiring length in feet (meter)............................................................................. 39

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Spectrex Inc. -SharpEyeTM Single IR Flame Detector Manual–TM 20/20R, Rev. A January2005
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1. Scope
1.1 Product Overview
The Spectrex Model 20/20R Single IR Flame Detector provides early warning of
flaming fires involving organic (hydrocarbon fuels and vapours) materials. These
fires emit strong IR radiation in the 4.4-micron spectral band where the CO2(main
combustion product of any organic substance) has a unique spectral peak.
This detector contains a “state-of-the-art” infrared sensor and optical filter that
provides maximum sensitivity to the CO2emission spectral band at 4.4 micron.
The detector withstands “harsh” environmental conditions, including extreme
temperature, high humidity, vibrations, etc.
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. Operation-the detector’s operation modes, user interface and
indications.
Chapter 5. Technical Specifications -the Detector’s electrical, mechanical and
environmental specifications.
Chapter 6. Installation Instructions, including wiring and mode setting.
Chapter 7. Operating Instructionsand power-up procedures.
Chapter 8. Maintenance Instructions and support procedures.
Appendix A.Wiring Selection Tablesfor electrical wire selection according
to installation configuration.
Appendix B. Typical Wiring Configurations -wiring diagrams for
installation.
Appendix C. RS-485 Communication Network
Appendix D. Mounting the “EExde approved” version
Appendix E. Long Range IR Fire Simulator

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2. Technical Description
•Detection Range: up to 50ft (15m) for a 1ft x 1ft (0.3m x 0.3m) fire.
•Field Programmable Sensitivity: two ranges.
•Two Response Levels: Warning & Detection.
•Microprocessor Based: Digital signal processing.
•Built In Test: Manual and Automatic (see section. 4.2.2).
•Electrical Interface:
oDry contact RELAYS.
oCommunication network RS-485.
o4-20mA output.
•Certification: Approved by ATEX.
2.1 Principles Of Operation
The Single IR flame detector provides early warning of flaming fires involving
organic (hydrocarbon fuels and vapours) materials. These fires emit strong IR
radiation in the 4.4-micron spectral band where the CO2(main combustion product
of any organic substance) has a unique spectral peak.
This detector contains a “state-of-the-art” infrared sensor and optical filter that
provides maximum sensitivity of the CO2emission spectral band at 4.4 micron.
The detector is designed to withstand “harsh” environment conditions, including
extreme temperature, high humidity, vibrations, etc.
Figure 1: IR Flame Detector

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Figure 2: Flame Detector Assembly-Outline Drawing

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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
(2m/sec).
SensitivityRanges:
The detector has two 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 12
Range –ft (m) 15 (5) 50 (15)
Response Time (sec)
510
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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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%
DieselFuel 50%

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3.2 Cone Of Vision
Horizontal: 90°
Vertical: 90°
Figure 3: Horizontal and Vertical Fields of View

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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 Immunity
Distance
Radiation Source
ft (m)
Incandescent frosted glass light, 100 W 1.7 0.5
Fluorescent light with white enamel reflector, standard office or
shop, 40 W (or two 20 W) IAD
Arc welding [4 mm (5/32 in) rod; 240 A] 11.5 3.5
Halogen light 750W 16.5 5.5
Grinding metal 1.7 0.5
Lit cigar 3.3 1
Lit cigarette 1.7 0.5
Match, wood, stick including flare up 1.7 0.5

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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 flashes (4 Hz)
ii. Alarm LED (Red)
Normal -LED OFF
Warning -LED flashes (2 Hz)
ALARM -LED ON
Figure 4: Indication LEDs

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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 latcheddue 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 4: Output Signals Versus Detector State
Detector
State SW1 Power Led Alarm Led Alarm Relay Accessory Relay Fault Relay 4-20mA Output
Normal On Off Off Off On 5mA
Warning Sw1-2 ON On Flash
2Hz Off On On 10mA
Alarm On On On On On 15mA
Latch Sw1-1 ON On Off On Off On 5mA
Fault Flash
4Hz Off Off Off Off 0mA
•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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4.2.1 Optional latching
The detector includes a latched alarm output capability, which operates according
tothe DIPswitchSW1-1 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.
Note: The detectors’ status is available through its RS-485 communication link.
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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4.3.1 Function switch (SW1):
The user can select the desired mode of operation by means of this switch
according to table 5:
Table 5: Function Switch SW1
SW. ON Position OFF Position
1Alarm latching-enabled Alarm latching –disabled(default)
2Accessory relay activated at warning
level Accessory relay activated at detection level (together with Alarm
relay) -(default)
3Automatic & manual BIT(default) Manual BIT only
4Successful manual BIT activates the
Alarm relay and the 4-20mA output
turns to 15mA for approximately 3
seconds (default)
Successful manual BIT does not
activate the Alarm relay.
5Successful manual BIT activates the
accessoryrelay and the 4-20mA
output turns to 10mA for
approximately 3 seconds(default)
Successful manual BIT does not
activate the Accessory relay.
6* Sensitivity range –see table 6 below
(default) Sensitivity range -see table 6
7* Sensitivity range -see table 6 below Sensitivity range -see table 6
(default)
8Accessory relay used as End Of
Line. Accessory relay operates in accordance with the settings of
SW1(default)
* See Table 6 for sensitivity range setting.
Table 6: Sensitivity range
Sensitivity Range SW1-7SW1-6
1 (lowest) 16.5 ft (5m) OFF OFF
2 (highest) 50 ft (15m) OFF ON

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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 7and 8.
Table 7: Address Switches SW2
SWITCH Description
1Address bit 0 (LSB)
2Address bit 1
3Address bit 2
4Address bit 3
5Address bit 4
6Address 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 8: SW2 Address Setting
Address SW2-6SW2-5SW2-4SW2-3SW2-2SW2-1
0OFF OFF OFF OFF OFF OFF
1OFF OFF OFF OFF OFF ON
2OFF OFF OFF OFF ON OFF
3OFF OFF OFF OFF ON ON
4OFF OFF OFF ON OFF OFF
5OFF OFF OFF ON OFF ON
..
..
..
62 ON ON ON ON ON OFF
63 ON ON ON ON ON ON
Note: Default address = 0