SharpEye 20/20L Istruzioni operative

UV/IR Flame Detector

Model 20/20L-LB

User's and Maintenance Manual

TM20/20LB Rev E, 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 + H2T5

EExde IIB + H2T5

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: spectr[email protected]

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. - SharpEyeTM UV/IR Flame Detector Manual – TM20/20LB Rev E, August 2004

TABLE OF CONTENT

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 Sensing Elements .......................................................................................2

2.3 Detection Levels..........................................................................................3

2.4 Alarm Signal Delay......................................................................................3

2.5 Built-In-Test (BIT) Capabilities.....................................................................3

2.6 Detector Structure .......................................................................................4

2.7 System Configuration ..................................................................................4

2.8 Detector Types ............................................................................................4

3. Performance .....................................................................................................7

3.1 Detection Sensitivity ....................................................................................7

3.2 Cone Of Vision ............................................................................................9

3.3 False Alarms .............................................................................................10

4. Operation ........................................................................................................11

4.1 Visual Indications ......................................................................................11

4.2 Output Signals...........................................................................................11

4.3 Mode Selection..........................................................................................12

4.3.1 Function switch (SW1)........................................................................12

4.3.2 Alarm Delay Switch (SW2)..................................................................14

4.4 Detector States..........................................................................................15

4.5 Built-In-Test (refer to 2.5) .........................................................................16

5. Technical Specifications .................................................................................18

5.1 Electrical Specifications.............................................................................18

5.2 Mechanical Specifications .........................................................................20

5.3 Environmental Specifications ....................................................................21

6. Installation Instructions ...................................................................................22

6.1 Introduction................................................................................................22

6.2 General Considerations.............................................................................22

6.3 Preparations 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 (Figure 4a and 4b) .................................................24

6.6 Wiring (Refer to Fig. 5) ..............................................................................27

6.7 Terminal Wiring (Figures 6,7) ....................................................................28

6.8 Selection Of Operating Modes ..................................................................32

7. Operating Instructions.....................................................................................33

7.1 Scope ........................................................................................................33

7.2 Power-Up ..................................................................................................33

7.3 Reset.........................................................................................................33

7.4 Functional Testing .....................................................................................34

Spectrex Inc. - SharpEyeTM UV/IR Flame Detector Manual – TM20/20LB Rev E, August 2004

7.5 Testing With Fire Simulator (See Appendix D) ..........................................34

7.6 Safety Precautions ....................................................................................35

8. Maintenance Instructions ................................................................................36

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. Mounting the “EExde approved” version ........................................43

Appendix D. Long Range UV/IR Fire Simulator ..................................................47

Spectrex Inc. - SharpEyeTM UV/IR Flame Detector Manual – TM20/20LB Rev E, August 2004

III

LIST OF FIGURES

Figure 1. Flame Detector Assembly - Outline Drawing..................................................... 5

Figure 2. Flame Detector Assembly - Schematic Section................................................... 6

Figure 3. Horizontal and Vertical Fields of View.............................................................. 9

Figure 4.a. U/IR Detector and Swivel Mount Assembly................................................... 25

Figure 4.b. Swivel Mount Assembly.................................................................................. 26

Figure 5. UV/IR Flame Detector with Cover Removed....................................................29

Figure 6. Terminal Board Configuration ......................................................................... 30

Figure 7. Flame Detector Assembly - Wiring Diagram ................................................... 31

Figure 8. Typical Wiring Diagram for Four-Wire Controller ......................................... 41

Figure 9. Wiring Diagram for 4-20mA............................................................................. 41

Figure 10: Flame Detector Assembly - Wiring Diagram................................................. 45

Figure 11: OPTION A Flame Detector Assembly - Wiring Diagram (“de version”).....46

Figure 12: OPTION B Flame Detector Assembly - Wiring Diagram (“de version”).....46

Figure 13: Fire Simulator................................................................................................. 47

Figure 14: UV/IR Detector Target Point..........................................................................48

LIST OF TABLES

Table 1. Response Sensitivity Ranges................................................................................. 8

Table 2. Immunity to False Alarm Faults......................................................................... 10

Table 3. LED indications within different detector states................................................ 11

Table 4. Function Switch SW1.......................................................................................... 12

Table 5. SW2 Alarm Delay Setting ................................................................................... 14

Table 6. Output Signals Versus Detector State.................................................................15

Table 7. Dry Contacts Relays Ratings.............................................................................. 19

Table 8: Mounting according to US Version....................................................................24

Table 9: Mounting according to EU Version ................................................................... 24

Table 10. Maximum DC resistance at 68°F for copper wire............................................ 39

Table 11. Wiring length in feet (meter)............................................................................. 39

Table 12. Terminals wiring options of the detector..........................................................46

Spectrex Inc. - SharpEyeTM UV/IR Flame Detector Manual – TM20/20LB Rev E, August 2004

1. Scope

1.1 Product Overview

The Spectrex Model 20/20L, 20/20LB is a UV-IR 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. It uses innovative technology of advanced digital signal processing to

analyze the dynamic characteristics of fire.

The difference between the Models is that Model 20/20LB includes a Built In Test

(BIT) function while the model 20/20L does not.

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 that provides excellent detection sensitivity with extreme

immunity to false alarm.

1.2 Document Overview

This manual describes the detector and its features. It describes instructions on

the installation, operation and maintenance.

This manual is divided into several parts. Each part is contained in a separate

chapter 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 modes, user interface and indications.

Chapter 5. Technical Specifications Detector’s electrical, mechanical and

environmental specifications.

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 to

installation configuration.

Appendix B. Typical Wiring Configurations provides wiring diagrams for

installation.

Appendix C. Mounting the “EExde approved” version

Appendix D. Long Range UV/IR Fire Simulator

Spectrex Inc. - SharpEyeTM UV/IR Flame Detector Manual – TM20/20LB 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.

• Ultra High Immunity to False Alarm (see section. 3.3.).

• Advanced Digital Processing of the Dynamic Characteristics of Fire:

Flickering and threshold

• Dual Spectrum: UV and IR radiation

• Multiple Detection Levels: Warning, alarm and saturated signal

• Solar Blind

• Microprocessor Based: Microcontroller performs signal processing

• Built-In-Test: Manual and automatic BIT for 20/20LB only

(see section 4.5)

• Electrical Interface:

o Dry contact RELAYS.

o 4-20mA outputs.

2.1 Principles Of Operation

The Model 20/20L, 20/20LB Radiation Flame Detector is an electronic device

designed to sense the occurrence of fire and flames and subsequently activate

an alarm or an extinguishing system directly or through a control circuit.

The UV-IR Radiation Flame Detector is a dual spectrum optical detector sensitive

to two separate ranges of the radiation spectrum, both of which are present in

fires. The detector monitors the protected volume, by measuring the radiation

intensity in it, within two frequencies ranges of the electromagnetic spectrum,

namely the Ultra-Violet (UV) and the Infra-Red (IR).

The detector integrates two dependent channels in which appropriate detection

pulses are registered and further analyzed for frequency, intensity and duration.

2.2 Sensing Elements

The IR sensor is sensitive to radiation over the range of 2.5-3.0 micron. The IR

channel will register a detection signal, at the appropriate level, when the IR

sensor is exposed to radiation in the appropriate frequency range, having an

intermittent gleam pattern characteristic to flickering-fire, and a preset threshold

and time duration are reached.

The UV sensor is sensitive to radiation over the range of 0.185-0.260 micron.

The UV channel incorporates a special logic circuit that eliminates false alarms

caused by solar radiation and other non-fire UV sources. Further more; the UV

channel sensitivity is stabilized over the working temperature range.

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