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Spectrex SharpEye 20/20U User And Maintenance Manual

Uv flame detector
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User's and Maintenance Manual
Factory Mutual Approved
Class I Div. 1 Groups B, C, D
Class II Div. 1 Groups E, F, G
Web -Site:
UV Flame Detector
Model 20/20U, 20/20UB
TM20/20UB Rev E, August 2004
218 Little Falls Rd., Cedar Grove, NJ 07009 USA;
Phone: +1 (973) 239 8398 Fax: +1 (973) 239 7614
www.spectrex-inc.com
ATEX Approved
Ex II 2G
EExd IIB + H
T5
2
EExde IIB + H
T5
2
; Email:
spectrex@spectrex-inc.com

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  • Page 1 EExd IIB + H Class II Div. 1 Groups E, F, G 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-inc.com ; Email: spectrex@spectrex-inc.com...
  • Page 3 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...

  • Page 5: Table Of Contents

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 ABLE ONTENTS 1. Scope..........................1 1.1 Product Overview ....................1 1.2 Document Overview....................1 2. Technical Description....................2 2.1 Principles Of Operation..................2 2.2 The Sensing Element....................2 2.3 Detection Levels ....................2 2.4 Alarm Signal Delay....................3...
  • Page 6 Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 7.5 Testing With Fire Simulator (See Appendix D) ..........32 7.6 Safety Precautions ....................33 8. Maintenance Instructions ..................34 8.1 Scope........................34 8.2 Maintenance Instrumentation And Personnel..........34 8.3 Preventive Maintenance Procedures ...............34...
  • Page 7 Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 IGURES Figure 1. Flame Detector Assembly - Outline Drawing............. 4 Figure 2. Flame Detector Assembly - Schematic Section ........... 5 Figure 3. Horizontal and Vertical Fields of View .............. 7 Figure 4.a.
  • Page 8 Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004...

  • Page 9: Scope

    1. Scope 1.1 Product Overview The Spectrex Model 20/20U, 20/20UB is a UV Flame Detector. It is designed to sense the occurrence of fire and flames and subsequently activate an alarm or an extinguishing system directly or through a control circuit for maximum fire protection.

  • Page 10: Technical Description

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 2. Technical Description • Detection Range: Up to 50 ft (15m) for a 1ft x 1ft (0.3m x 0.3m) Gasoline fire. • Advanced Digital Processing Of The Dynamic Characteristics Of Fire.

  • Page 11: Alarm Signal Delay

    2.7 System Configuration The Spectrex model 20/20U, 20/20UB is a self-contained Optical Flame Detector that can function as a stand alone unit directly connected to external devices as alarm systems or automatic fire extinguishing systems. The same detector can form part of a more complex system where a plurality of detectors and other devices are integrated through a dedicated control unit.

  • Page 12: Detector Types

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 2.8 Detector Types This manual covers two types of detectors. Model 20/20UB and model 20/20U, the difference is that Model 20/20UB includes a BIT and 20/20U does not include this feature.

  • Page 13: Figure 2. Flame Detector Assembly - Schematic Section

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 Figure 2. Flame Detector Assembly - Schematic Section Note 1: This figure describes the Detector, which includes Ground Terminal for ATEX installation. For FM installation device, external grounding screw mounting.

  • Page 14: Performance

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, 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).

  • Page 15: Cone Of Vision

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 3.2 Cone Of Vision Horizontal: 90° Vertical: 90° Figure 3 illustrates the relative range as a function of the incidence angle. Figure 3. Horizontal and Vertical Fields of View...

  • Page 16: False Alarms

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 3.3 False Alarms The detector does not provide an alarm or a warning signal as a reaction to the radiation sources specified at Table 2 below.

  • Page 17: Operation

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 4. Operation 4.1 Visual Indications Two indications LEDs are located in the detector’s front window. Yellow LED - Provides indication of Normal o r Fault state.

  • Page 18: Mode Selection

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 4.3 Mode Selection The detector has 2 DIPswitches, which enables the user to adapt the detector’s operation to specific applications: • Function switch (SW1) • Alarm Delay Switch (SW2) 4.3.1 Function switch (SW1)
  • Page 19 Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 Optional Latching (default is non-latching): The detector includes a latched alarm output capability, which operates according to the DIP-switch SW1-1 position. Upon the detection of a fire, the detection signal is latched until manually reset (disconnecting the power supply or upon performing a manual BIT).

  • Page 20: Alarm Delay Switch (Sw2) - Default 5 Sec

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 4.3.2 Alarm Delay Switch (SW2) – default 5 sec. The detector is equipped with different Alarm Delay options. It provides programmable time delays of 0 to 30 seconds with eight (8) fixed settings at: 0, 3, 5, 10, 15, 20, 25 and 30 seconds, using SW2 switches 1-3.

  • Page 21: Detector States

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 4.4 Detector States The detector can be in one of the following states: Normal: The detector is functioning. BIT: The detector performs a BIT. Warning: Fire detected - changes to its Warning pre-alarm state.

  • Page 22: Built-In-Test (Refer To 2.5)

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 4.5 Built-In-Test (refer to 2.5) a. Principles The detector’s Built In Test (BIT) checks the following: • Electric circuitry • Sensor • Window cleanliness The detector can be set to perform the BIT automatically and manually (SW1-2 = ON) or manually only (SW1-2 = OFF).
  • Page 23 Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 d. Automatic & Manual BIT (only when SW1-2 = ON): Manual BIT: Functions as described in section 4.5.c. In the case of an unsuccessful BIT, all outputs will function as described in section.

  • Page 24: Technical Specifications

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 5. Technical Specifications 5.1 Electrical Specifications a. Operating Voltage: 18-32 VDC b. Power Consumption: Max. 80mA in Stand-by Max. 120mA in Alarm c. Electric input protection: The input circuit is protected against voltage reversed polarity voltage transients, surges and spikes according to MIL-STD-1275A.

  • Page 25: Table 7. Dry Contacts Relays Ratings

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 e. Electrical Outputs: • Output Relays: Table 7. Dry Contacts Relays Ratings Relay Type Normal position Maximum Ratings Name Alarm SPDT N.O. N.C. 2A at 30VDC or 0.5A at 250 VAC Accessory SPST N.O.

  • Page 26: Mechanical Specifications

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 5.2 Mechanical Specifications a. Enclosure: Aluminum: Chromate coating and Epoxy enamel finish Stainless Steel 316: Electrochemical passivation coating b. Explosion Proof FM approval Class I Div. 1 Groups B, C and D;...

  • Page 27: Environmental Specifications

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 5.3 Environmental Specifications a. High Temperature: Design to MIL-STD-810C, method 501.1 procedure II Operating temperature: +70 °C (+160 °F) Optional operating temperature: +85 °C (+185 °F) Storage temperature: +85 °C (+185 °F)

  • Page 28: Installation Instructions

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 6. Installation Instructions 6.1 Introduction 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.

  • Page 29: Preparations For Installation

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, 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.

  • Page 30: Detector Mounting

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 6.5 Detector Mounting The detector may be mounted on a simple fabricated bracket, or preferably the optional Swivel Mount, Model No. 20/20-003. The Swivel Mount enables the detector to be rotated up to 40 degrees in all directions.

  • Page 31: Figure 4.A. Uv Detector And Swivel Mount Assembly

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 Figure 4.a. UV Detector and Swivel Mount Assembly...

  • Page 32: Figure 4.B. Swivel Mount Assembly

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 Description Protective Set Screws Ground Terminal (for ATEX) or Ground Thread (for FM) Back Cover Housing Swivel Mount Screw Hole Swivel Mount Holding Plate Locking Screws...

  • Page 33: Wiring (Refer To Fig. 5)

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 6.6 Wiring (Refer to Fig. 5) Disconnect power. Remove the four protective set-screws (Fig 4a, item 1) from detector front. Release the four socket-head screws that secure the detector housing (Item 6) to its back cover (Item 3) using No.

  • Page 34: Terminal Wiring (Figures 6,7)

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 6.7 Terminal Wiring (Figures 6,7) The detector contains a terminal board consisting of two terminal blocks. The left terminal block is labeled 1 to 6; the right terminal block is labeled 7 to 12.

  • Page 35: Figure 5. Uv Flame Detector With Cover Removed

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 Legend: Alarm Delay Switch (SW2) Function Switch (SW1) Housing Earth (Ground) Terminal (for ATEX) or Earth Thread (for Grounding Wires Back Cover Terminal Board Securing Cable...

  • Page 36: Figure 6. Terminal Board Configuration

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 Figure 6. Terminal Board Configuration Legend: 1. Function Switch (SW1) 2. Alarm Delay Switch (SW2) 3. Ground Cable 4. Terminal Screws...

  • Page 37: Figure 7. Flame Detector Assembly - Wiring Diagram

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 Figure 7. Flame Detector Assembly - Wiring Diagram...

  • Page 38: Selection Of Operating Modes

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 6.8 Selection Of Operating Modes When wiring is completed the operational mode can be selected. Mode selection is achieved by means of two DIPswitches listed below:...

  • Page 39: Operating Instructions

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, 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 Apply power and wait up to 40 seconds for the automatic self-test of the detector.

  • Page 40: Functional Testing

    The yellow LED should blink at 0.5Hz rate. If the detector is ON, skip this step. Aim the Spectrex Fire Simulator Model 20/20-311 to the target point of the detector (see Fig. 14), in a way that the radiation emitted by it is facing directly towards the detector (See Appendix D.)

  • Page 41: Safety Precautions

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 7.6 Safety Precautions After powering-up, the detector requires minimal 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.

  • Page 42: Maintenance Instructions

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, 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 any invalidate the warranty.

  • Page 43: Maintenance Records

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, 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, installation date, contractor, and entries for every maintenance operation performed including the description of the operation, date and personnel ID.
  • Page 44 Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004...

  • Page 45: Appendix A - Wire Selection Tables

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 Appendix A - Wire Selection Tables ENERAL NSTRUCTION FOR LECTRICAL IRING 1. Refer to Table 10 to determine the required wire gauge for general wiring, such as relay wiring.
  • Page 46 Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004...

  • Page 47: Appendix B. Typical Wiring Configurations

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 Appendix B. Typical Wiring Configurations Wiring for Four Wire Controllers: Figure 8. Typical Wiring Diagram for Four-Wire Controller 4-20mA Interface Wiring: Figure 9. Wiring Diagram for 4-20mA...
  • Page 48 Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004...

  • Page 49: Appendix C. Mounting The "Eexde Approved" Version

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 Appendix C. 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.
  • Page 50 Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 2. Wiring Refer to Fig. 10. Disconnect power. Release the four (4) slotted-head screws (Item 3) that secure the chamber cover (Item 2). The chamber is now revealed.

  • Page 51: Figure 10: Flame Detector Assembly - Wiring Diagram

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 Figure 10: Flame Detector Assembly - Wiring Diagram Description Modified Back Cover 5 Ground Terminal Chamber Cover 6 Mounting Thread Slotted Screw 7 Chamber Terminal Block...

  • Page 52: Figure 11: Option A Flame Detector Assembly - Wiring Diagram ("De Version")

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 2.1 Terminal Wiring The detector contains a chamber consisting of a terminal block (Item 4). The terminal block is labeled 1 to 6. (See Fig. No.10.) Table 12.

  • Page 53: Appendix D. Long Range Uv/Ir Fire Simulator

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 Appendix D. Long Range UV/IR Fire Simulator Figure 13: Fire Simulator Product Description The SharpEye UV/IR Long-Range Fire simulator 20/20-311 is designed specifically for use with the UV/IR or UV flame detectors. The Fire Simulator emits UV/IR radiation in a unique sequential pattern corresponding and recognizable by the detector as fire.

  • Page 54: Figure 14: Uv Detector Target Point

    Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 Figure 14: UV Detector Target Point 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.
  • Page 55 Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 Battery Charging 1 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.
  • Page 56 Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, 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 &...
  • Page 57 Spectrex Inc. - SharpEye™ UV Flame Detector Manual – TM 20/20UB Rev. E, August 2004 For additional details or assistance, please contact 218 Little Falls Road Cedar Grove, NJ 07009, USA Tel: (973) 239-8398 Fax: (973) 239-7614 Email: spectrex@spectrex-inc.com Web-site: www.spectrex-inc.com...

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