Hydrogen Flame Detector Model 20/20SH User and Maintenance Manual TM 784600, Rev. A, May 2005 Factory Mutual (Pending) ATEX (Pending) Class I Div. 1 Groups B, C, D Class II Div. 1 Groups E, F, G Ex II 2G EExd IIB + H2 T5 EExde IIB + H2 T5 218 Little Falls Rd., Cedar Grove, NJ 07009 USA; Phone: +1 (973) 239 8398 Fax: +1 (973) 239 7614 Web-Site: www.spectrex.net; Email: spectrex@spectrex.
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.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 TABLE OF CONTENTS 1. Scope .................................................................................................... 1 1.1 PRODUCT OVERVIEW .....................................................................................1 1.2 DOCUMENT OVERVIEW ...................................................................................1 2. Technical Description .............................................
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 7.5 SAFETY PRECAUTIONS .................................................................................34 8. Maintenance Instructions .................................................................. 35 8.1 SCOPE ........................................................................................................35 8.2 MAINTENANCE INSTRUMENTATION AND PERSONNEL .......................................35 8.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 LIST OF FIGURES Figure 1: Hydrogen (SH) Flame Detector.......................................................................... 3 Figure 2: Flame Detector Assembly - Outline Drawing .................................................... 4 Figure 3: Horizontal and Vertical Fields of View .............................................................. 6 Figure 4: Indication LEDs........................................
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector IV Manual – TM 784600, Rev.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 1. Scope 1.1 Product Overview The Spectrex Model 20/20SH is a special version of the Hydrogen Flame Detector that is manufactured in S.M.T. Technology. The detector is designed to provide maximum fire protection in areas where hydrogen fires are likely to occur.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 2. Technical Description • • • • • • • • • • • Detection Range: up to 100 ft (30 m) for an Hydrogen plume fire with 20” (0.5m) height and 8” (0.2m) width. 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 1-4 microns.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 2.1 Principles Of Operation 2.1.1 Hydrogen fire detection This Fire Detector detects the invisible Hydrogen flames by spectral analysis of the infrared energy emitted by the fire. Special sensors and filters have been selected to identify the hydrogen’s main combustion product – water vapor. 2.1.2 Identifying the H2O peak The hydrogen fire is characterized by a typical radiation emission.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 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: Gases – define by a plume fire with 20” (0.5m) height and 8” (0.2m) width or Liquid - 1ft2 (0.1m2) pan fire Wind speed of 6.5 ft/sec (2 m/sec).
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 Other fuels The detector will react to other types of fires as follows: Fire Size: Methanol and ethanol - 1ft2 (0.1m2) pan fire Maximum Wind Speed: 6.5 ft/sec (2 m/sec) Maximum Response Time: 10 sec Table 2: Response Sensitivity for other Fuels Type Of Fuel % of Max. Distance Hydrogen 100% Ethanol 62% Methanol 26% 3.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 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.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 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.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 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.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector 4 Manual – TM 784600, Rev. A, May 2005 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. 4.2.1 Optional latching The detector includes a latched alarm output capability, which operates according to the programmable function.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 4.3 Detector Mode Setup The setup screen allows seeing and programming the detector function to determine different functions of the detector. Refer to Manual TM784050.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 4.3.1 Function Setup The user can select the desired mode of operation by means of host.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 4.3.3 Alarm Delay The detector is equipped with an Alarm Delay option, which provides programmable time delays of 0 to 30 sec. with eight (8) fixed settings at: 0, antiflare, 3, 5, 10, 15, 20, and 30 sec. When an Alarm (Detection) level condition is encountered, the detector delays the execution of the Alarm output’s relay by the specified period of time. The detector will then evaluate the condition for 3 sec.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 4.4 Built In Test A. General The detectors’ Built In Test (BIT) checks the following: • Electronics circuitry • Sensors • Window cleanliness The detector can be set to perform the BIT automatically and manually or manually only. B. Principles If the result of a BIT is the same as the current status of the detector (NORMAL or BIT FAULT), the detector's status is unchanged.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 D. Automatic & Manual BIT Manual Bit Functions as described in Paragraph 4.4.C. In the case of an unsuccessful BIT all outputs will function as described in Paragraph. 4.4.C, but the BIT will be automatically executed every 1-minute. This mode of operation will continue until successful Bit has been encountered. As a result, the detector will resume its normal operation.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 5.Technical Specifications 5.1 Electrical Specifications A. Operating Voltage: 18-32 VDC B. Power Consumption: Max. 100mA in Stand-by Max. 150mA in Alarm C. Electric input protection: The input circuit is protected against voltagereversed polarity, voltage transients, surges and spikes according to MILSTD-1275A.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 D.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 E. Electrical outputs • Dry Contact Relays: Table 9: Contact Ratings Relay Type Normal Maximum Ratings Name position 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: STATE Output FAULT 0 + 0.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 5.2 Mechanical Specifications A. Enclosure Aluminum: Chromate coating and Epoxy enamel finish or Stainless Steel 316: Electrochemical passivation coating B. Explosion proof FM (pending) Class I Div. 1 Groups B, C and D; Class II Div. 1 Groups E, F and G. ATEX (pending) Ex II 2G SIRA 00ATEX 1163, 1164 Temp.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 5.3 Environmental Specifications A. High Temperature Design to meet MIL-STD-810C, method 501.1 procedure II Operating temperature: +160 °F (+70 °C) +185 °F (+85 °C) Optional operating 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.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 6. Installation Instructions 6.1 Scope The "Spectrex" Model 20/20SH 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 be a part of a more complex system where many detectors and other devices are integrated through a common control unit.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 6.3 Preparations for Installation Installation should comply with NFPA 72E or other local codes, 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.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 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 10: Mounting according to US Version Item Qty.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 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 4) 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 4).
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 6.7 Terminal wiring (See Fig. No.10 and No.11.) The detector contains a Terminal Board consisting of two (2) terminal blocks. 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 -Terminal No. 1. RETURN - Terminal No. 2.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 • 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 - output Terminal. Terminal No. 12 - 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 - positive (+) lead.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 6.8 Operation Mode When wiring is completed the operational mode can be selected. Mode selection is achieved through RS-485 using a PC with a Spectrex Host. Refer to TM784050. Programmable Function: Modes of operation are programmable with a PC or Handheld unit according to the selection table in Paragraph 4.3.1 and Refer to TM 784050. Address: The detector has the capability of acting as an addressable device.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 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.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 7.4.1 Manual BIT Test Important Note! If the function setup “Alarm BIT” and/or “Accessory BIT” are in YES, then the Alarm, Accessory Relay 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.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 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.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 8.5 Maintenance Records It is recommended to record maintenance operations performed on a detector in a 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.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 Appendix A - Wire Selection Tables General Instructions For Electrical Wiring 1. Refer to Table 12 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 13 to select wire gauge for power supply wires. DO NOT connect any circuit or load to detectors’ supply inputs.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector 38 Manual – TM 784600, Rev.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 Figure 15: Typical wiring diagram for controllers with alarm & fault loops Notes: 1. For EOL Resistors Values See Controller Manual 2.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 Figure 16: 4-20mA wiring Notes: The detectors are factory set to isolated 4-20mA ‘sink’ version. To work at non-isolated 4-20mA ‘source’ version, connect Terminal 12 to Terminal 1. The 4-20mA meter is connected between Terminal 11 and Terminal 2.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 Appendix C – RS-485 Communication Network Using the RS-485 network capability of the Hydrogen 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) up to 247 on the same 4 wires.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector 44 Manual – TM 784600, Rev.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 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).
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 2. WIRING (REFER TO FIG. 18.) 1 Disconnect power. 2 Release the four (4) slotted-head screws (item 3) that secure the terminal box cover (Item 2). The terminal box is now revealed. 3 Remove the protective plug mounted on the detector conduit inlet, pull the wires through the terminal box (Item 7). Use M25x1.5 EExe cable glands to assemble the cable to the detector/terminal box.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 Figure 18: Flame Detector Assembly - Wiring Diagram Description 1. Modified Back Cover 5. Ground Terminal 2. EExe terminal box Cover 6. Mounting Thread 3. Slotted Screw 7. EExe terminal box 4. Terminal Block 8.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 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): Alarm & Fault Relays Version Option B (See Fig. No.
Spectrex Inc. - SharpEyeTM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005 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.
