Net Safety UV/IRS-H2-A Manual de usuario

MAN-0101 Rev 01 UVIRS-H2-A/H2-AR & UVIRS-H2-A-X/H2-AR-X

November 23, 2012

Ultraviolet / Infrared

Hydrogen Flame Detector

User Manual

Models:

UV/IRS-H2-A OR UV/IRS-H2-AR

AND

UV/IRS-H2-A-X OR UV/IRS-H2-AR-X

Net Safety Monitoring

MAN-0101 Rev 01 UVIRS-H2-A/H2-AR & UVIRS-H2-A-X/H2-AR-X 3

November 23, 2012

IMPORTANT INFORMATION

This manual is for informational purposes only. Although every effort has

been made to ensure the correctness of the information, technical

inaccuracies may occur and periodic changes may be made without notice.

Net Safety Monitoring Inc., assumes no responsibility for any errors

contained within this manual.

If the products or procedures are used for purposes other than as described in

the manual, without receiving prior confirmation of validity or suitability,

Net Safety Monitoring Inc., does not guarantee the results and assumes no

obligation or liability.

Complete instructions have been provided for the safe service, use,

installation, configuration and maintenance of this product in compliance

with EN 60079-14 and EN 60079-10 for hazardous locations. Ensure this

manual is read thoroughly before installation or operation.

No part of this manual may be copied, disseminated or distributed without

the express written consent of Net Safety Monitoring Inc.

Net Safety Monitoring Inc., products are carefully designed and

manufactured from high quality components and can be expected to provide

many years of trouble free service. Each product is thoroughly tested,

inspected and calibrated prior to shipment. Failures can occur which are

beyond the control of the manufacturer. Failures can be minimized by

adhering to the operating and maintenance instructions herein. Where the

absolute greatest of reliability is required, redundancy should be designed

into the system.

Warranty

Net Safety Monitoring Inc., warrants its sensors against defective parts and

workmanship for a period of 24 months from date of purchase; other

electronic assemblies for 36 months from date of purchase.

No other warranties or liability, expressed or implied, will be honoured by

Net Safety Monitoring Inc.

Contact Net Safety Monitoring Inc or an authorized representative for details.

We welcome your input at Net Safety Monitoring. If you have any comments

please contact us at the phone/address below or visit our web site and

complete our on-line customer survey: www.net-safety.com.

Contact Information

Net Safety Monitoring Inc.

2721 Hopewell Place NE

Calgary, AB

Canada

T1Y 7J7

Telephone: (403) 219-0688 Fax: (403) 219-0694

www.net-safety.com

E-mail: | Email: [email protected]

Printed in Canada

TABLE OF CONTENTS

Important Information...................................................................................... 3

Warranty.......................................................................................................... 3

Contact Information......................................................................................... 3

Introduction...................................................................................................... 5

Spectral Sensitivity Range........................................................................... 5

Locate Detector ........................................................................................... 5

Typical applications and ignition sources.................................................... 5

Potential inhibitors ....................................................................................... 5

Absorbing Gases......................................................................................... 6

Immune........................................................................................................ 6

Range.............................................................................................................. 6

Field of View.................................................................................................... 7

Installation Considerations.............................................................................. 7

Unpack............................................................................................................ 8

Reflector Positioning ....................................................................................... 9

Field Installation ............................................................................................ 10

Wiring.........................................................................................................10

Grounding..................................................................................................10

Sealing.......................................................................................................10

Connecting................................................................................................. 11

Detector Setup .............................................................................................. 13

System Sensitivity ..................................................................................... 13

DIP Switch Access................................................................................. 13

Sensitivity Setting...................................................................................13

Time Delay Setting................................................................................. 13

Closing the Housing...............................................................................14

Relay Settings............................................................................................... 14

Coil and Latch Status ................................................................................ 14

Remote Reset........................................................................................14

Final Setup.............................................................................................14

Detector Functionality ................................................................................... 15

Detector Window/Lens .............................................................................. 15

Start Up Procedure....................................................................................15

System Check............................................................................................ 15

Monitor.......................................................................................................15

Condition Status—LEDs ........................................................................ 15

Condition Status—Current Output......................................................... 16

Detector Maintenance................................................................................... 17

Testing.......................................................................................................17

Manual Check Procedure.......................................................................... 17

Automatic Visual Integrity (VI) Test ........................................................... 17

Manual VI Test...........................................................................................17

Test Procedure ...................................................................................... 18

Cleaning Window/Lens and Reflector...........................................................19

O-ring .........................................................................................................19

How To Return Equipment............................................................................20

Troubleshoot .................................................................................................21

Appendix A: Common UV Absorbing Gases ................................................22

Appendix B: Electrostatic Sensitive Device (ESD)........................................ 23

Appendix C: Resistance Table......................................................................24

Appendix D: Specifications ...........................................................................25

Appendix E: UVIRS-H2 DATA ......................................................................26

Appendix F: UVIRS-H2 Graphical Field of View Data ..................................27

Net Safety Monitoring

MAN-0101 Rev 01 UVIRS-H2-A/H2-AR & UVIRS-H2-A-X/H2-AR-X 5

November 23, 2012

INTRODUCTION

The UV/IRS-H2 is a smart, stand-alone fire detector, combining sensors for

both the ultra-violet and infrared spectra. This detector was specially

designed to respond to radiation emitted by Hydrogen (H2) fires. The rugged

design is ideal for both indoor and outdoor applications.

The microcontroller monitors and analyzes each sensor to identify a variety

of flame conditions. Only when the defined detection criteria for both IR and

UV sensors indicate a fire condition will the detector alarm.

Spectral Sensitivity Range

The UV/IRS-H2 fire detector responds to UV radiation wavelengths of 185

to 260 nanometres (1850 to 2600 angstroms) and IR radiation in the 3.09

micron range. Note that UV radiation reaching the earth from the sun does

not extend into the sensitivity range of the detector, nor does radiation from

normal artificial lighting, such as fluorescent, mercury vapour and

incandescent lamps.

Locate Detector

When positioning fire detectors, consider such factors as, distance from the

fire, type of fuel and temperature, as well as any environmental factors which

may influence the detector’s response to radiation.

Typical applications and ignition sources

The UV/IRS-H2 was designed to detect Hydrogen (H2) based fires and

should be used in applications and environment related to Hydrogen.

Potential inhibitors

A potential inhibitor is anything located between the detector and a potential

fire source which could prevent the UV/IRS-H2 from detecting a fire or

reduce its sensitivity to fire. Possible inhibitors include but are not limited to

the following:

Solid objects such as machinery, glass or plexiglass between the detector

and potential fire source

Water, fog, rain, dirt or dust on the detector window or heavy smoke

between the detector and potential fire source

Net Safety Monitoring

MAN-0101 Rev 01 UVIRS-H2-A/H2-AR & UVIRS-H2-A-X/H2-AR-X 6

November 23, 2012

Absorbing Gases

A further potential inhibitor may be the presence of UV absorbing gases or

chemical vapours between the detector and source of potential fire. Such

gases could impede the detector’s ability to detect a UV flame source. Small

concentrations of these gases may not be sufficient to obstruct the sensor but

high concentrations may impede the UV sensor. Moving the detectors closer

to the probable fire source and increasing the sensitivity can, in some

circumstances, overcome this issue (refer to Appendix A ).

Immune

The UV/IRS-H2 exhibits excellent immunity to many conditions/activities

including but not limited to the following:

steady hot body radiation

artificial lighting

sunlight (direct/reflected)

arc welding radiation

RANGE

The practical application distance is directly related to the intensity of the

ultraviolet/infrared radiation source.

Table 1: Response Testing

Response Testing

Fuel

Size

Distance

(ft/m)

Average

Response

Time

(Seconds)

Hydrogen(H2)

24" Plume

55/16.7

1.8

NOTE: The response time is based on zero time delay and maximum

sensitivity.

Net Safety Monitoring

MAN-0101 Rev 01 UVIRS-H2-A/H2-AR & UVIRS-H2-A-X/H2-AR-X 7

November 23, 2012

Field of View

The area in front of a flame detector, where a standardized flame can be

detected and which is specified by distance and angle off the central axis, is

the Field of View. The referenced flame is moved to 50% of the maximum

on-axis detection distance and then moved off-axis horizontally and

vertically to the limit of detection. These off-axis angle limits specify Field

of View.

Table 2: Field of View Testing

Field of View Testing

Fuel

Size

Horizontal

Degrees

Hydrogen(H2)

24" Plume

128(+65, -63)

NOTE: Data based on Maximum Sensitivity

Setting.

Installation Considerations

The following should be considered when mounting flame detectors.

Point detector toward where the flame is expected.

Ensure an unobstructed view of the area to be monitored.

Employ more than one detector to ensure the hazard is fully covered.

The detector should be accessible for cleaning the window/lens and

reflector surfaces.

Tilt detector downward a minimum of 10 to 20°to reduce dirt and dust

accumulation which could obscure the detector’s viewing window.

Securely mount detector so as to reduce vibration as much as possible.

When located outside, detector sensitivity can be reduced by heavy fog,

rain and/or ice.

Reduce sensitivity setting if false alarms, related to surrounding activities,

occur (refer to "System Sensitivity" )

When installed near or on water (such as an off shore platform), be sure to

take into account the low horizon level when tilting detector downward.

UV radiation, other than that produced by an actual fire, is referred to as

"background UV". An example of a high level of background UV could

be a flare stack situated outside of a building. The UV radiation produced

by this flare, in conjunction with a false alarm IR source, may be

detected as fire when a door to the building is opened. Windows or other

reflective surfaces may also cause unusually high levels of UV radiation

to enter the building from the flare. In a situation like this, the fire

detection system response must be carefully checked and the sensitivity

level adjusted high enough so that this "background UV" will not cause

false alarms.

UV fire detectors respond to radiation other than ultraviolet. X-rays in

conjunction with a false alarm IR source can activate the detector. Since

X- rays are often used in industrial inspection it may be necessary to

disable the system when inspections are conducted nearby.

For protection against line surge and extraneous transients, it is required to

install detector wires in a braided flexible conduit less than 5 feet.

Note: CSA approved models (UVIRS-H2-A/AR) are not supplied with a

locking collar. ATEX approved models (UVIRS-H2-A-X/H2-AR-X) are

supplied with locking collar.

Net Safety Monitoring

MAN-0101 Rev 01 UVIRS-H2-A/H2-AR & UVIRS-H2-A-X/H2-AR-X 8

November 23, 2012

UNPACK

Carefully remove all components from the packaging. Check components

against the enclosed packing list and inspect all components for obvious

damage such as broken or loose parts.

If you find any components missing or damaged, notify the representative or

Net Safety Monitoring immediately.

Figure 1: Detector Housing and Swivel Mount

Note: Units are factory sealed.

Net Safety Monitoring

MAN-0101 Rev 01 UVIRS-H2-A/H2-AR & UVIRS-H2-A-X/H2-AR-X 9

November 23, 2012

Figure 2: Dimensional Drawing REFLECTOR POSITIONING

Ensure the external VI reflector is placed directly over the VI Emitters (refer

to Figure 7 for VI source location). Also ensure the detector is mounted with

the VI reflector in the top position, centred over the yellow dot.

Figure 3: Position of VI Reflector

Net Safety Monitoring

MAN-0101 Rev 01 UVIRS-H2-A/H2-AR & UVIRS-H2-A-X/H2-AR-X 10

November 23, 2012

FIELD INSTALLATION

WARNING:

Wiring codes and regulations may vary. Compliance with regulations

is the responsibility of the installer. Wiring must comply with

applicable regulations relating to the installation of electrical

equipment in a hazardous area. If in doubt, consult a qualified

official before wiring the system.

This equipment is only suitable for ATEX Category 2 (Zone 1)

locations.

Equipment must be installed in compliance with EN 60079-14.

The permanently connected cable need appropiate protection of the

free end of the cable. Use an ATEX certified Junction Box.

Do not open housing and expose electronics in a classified area .

(Do not open when an explosive atmosphere may be present)

Ensure area is de-classified prior to opening housing.

The parts of the bushing outside the flameproof enclosure have to be

protected from mechanical impact by means of Ex

components(e.g.Enclosure, Thread adapters, Conduit)

Wiring

For protection against line and extraneous transients, it is required to install

detector pig tail lead wires in a braided flexible conduit less than 5 feet in

length to the termination box. From the termination box to the power supply

the recommended detector cable is four conductor (or greater), shielded 18

AWG rated 300 V for distances up to 150 feet. When cable is installed in

conduit, the conduit must not be used to support wiring to any other

electrical equipment. Detectors can be located over 150 feet and up to 2000

feet, if 16 AWG shielded conductor is used. The maximum distance between

the detector and the power supply is limited by the resistance of the

connecting wiring, which is a function of the gauge of the wire being used.

Refer to “Appendix C, Resistance Table (Ohms)". The unterminated wires

must be terminated in a suitable certified ATEX enclosure or fitting.

Grounding

An external ground is required. The flame detector must also be connected to

an ATEX certified junction Box to ensure adherence to safety conditions. If

the junction box is non-metallic, the external ground must be provided by

some other means.

SEALING

Water-proof and explosion-proof conduit seals are recommended to prevent

the accumulation of moisture within the junction box. Seals should be

located as close to the device as possible and not more than 18 inches

(46 cm) away. Explosion-proof installations may require an additional seal

where conduit enters a non-hazardous area. When pouring a seal, use a fibre

dam to ensure proper formation of the seal. Seals should never be poured at

temperatures below freezing.

The jacket and shielding of the cable should be stripped back to permit the

seal to form around the individual wires. This will prevent air, gas and water

leakage through the inside of the shield and into the enclosure.

It is recommended that explosion-proof drains and conduit breathers be used.

Changes in temperature and barometric pressure can cause 'breathing' which

allows moist air to enter conduit. Joints are seldom enough to prevent

'breathing'.

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