MSA FlameGard 5 UV/IR-E Instruction Manual

FlameGard® 5

UV/IR-E

Ultraviolet/Infrared

Flame Detector

The information and technical data disclosed in
this document may be used and disseminated
only for the purposes and to the extent
specifically authorized in writing by General
Monitors.

Instruction Manual 09/09

General Monitors reserves the right to change
published specifications and designs without
prior notice.

Part No. MAN5UVIRE-EU
Revision 0

FlameGard 5 UV/IR-E

i

Warranty Statement

MSA warrants the FlameGard 5 UV/IR-E to be free from defects in workmanship or
material under normal use and service within two years from the date of shipment.

MSA will repair or replace without charge any such equipment found to be defective during
the warranty period. Full determination of the nature of, and responsibility for, defective or
damaged equipment will be made by MSA’s personnel.

Defective or damaged equipment must be shipped to MSA plant or representative from
which the original shipment was made. In all cases this warranty is limited to the cost of
the equipment supplied by MSA. The customer will assume all liability for the misuse of
this equipment by its employees or other personnel.

The customer will assume all liability for the misuse of this equipment by its employees or
other personnel. All warranties are contingent upon proper use in the application for which
the product was intended and do not cover products which have been modified or repaired
without MSA’ approval or which have been subjected to neglect, accident, improper
installation or application, or on which the original identification marks have been removed
or altered.

Except for the express warranty stated above, MSA disclaims all warranties with regard to
the products sold, including all implied warranties of merchantability and fitness and the
express warranties stated herein are in lieu of all obligations or liabilities on the part of
MSA for damages including, but not limited to, consequential damages arising out of, or in
connection with, the performance of the product.

Warnings

WARNING - Installation and Maintenance must be carried out by suitably skilled and

competent personnel only.

FlameGard 5 UV/IR-E

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EC Declaration of Conformity

The manufacturer or his in the community established authorized
representative

MSA AUER GmbH
Thiemannstraße 1
D-12059 Berlin

declares that the product :

MSA AUER FlameGard 5 UV/IR-E

based on the EC-Type Examination Certificates :

SIRA 10 ATEX 1365

complies with the ATEX directive 94/9/EC, Annex III. Quality Assurance
Notification complying with Annex IV of the ATEX Directive 94/9/EC has
been issued by SIRA Certification Service , Notified Body number: 0518.

The product fulfilled the standard EN 54 -10 :2002

The product is in conformance with the directive 2004 / 108/ EC ,(EMC) :

EN 50130-4 : 2002 EN 61000 - 6 - 4 :2007

MSA AUER GmbH

Dr. Axel Schubert
R & D Instruments Berlin , March 2011

FlameGard 5 UV/IR-E

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Table of Contents

Page

1.0 Introduction ...................................................................................................... 2

1.1 General Description ........................................................................... 2

1.2 Principle of Operation ........................................................................3

2.0 Specifications ...................................................................................................... 6

2.1 System Specifications........................................................................ 6

2.2 Mechanical Specifications.................................................................. 7

2.3 Electrical Specifications .................................................................... 7

2.4 Environmental Specifications............................................................. 8

2.5 Modbus RTU Protocol........................................................................ 8

3.0 Installation ...................................................................................................... 9

3.1 Upon Receipt of Your Equipment ...................................................... 9

3.2 Choosing Detector Locations............................................................. 9

3.3 Detector Installation ......................................................................... 10

3.4 Interconnecting Cable Guidelines.................................................... 11

3.5 Installation Instructions .................................................................... 11

3.6 Terminal Connections ...................................................................... 14

3.7 User Selectable Options .................................................................. 17

3.8 Factory Default Settings................................................................... 19

4.0 Maintenance .................................................................................................... 21

4.1 General Maintenance....................................................................... 21

4.2 Cleaning the Lenses/Light Rod........................................................ 21

4.3 Sensitivity Check.............................................................................. 22

4.4 Storage ............................................................................................ 22

5.0 Trouble Shooting ...............................................................................................23

5.1 Trouble Shooting Chart.................................................................... 23

6.0 Spares & Accessories ....................................................................................... 24

6.1 Spare Parts ...................................................................................... 24

6.2 Test Lamps ......................................................................................24

7.0 Markings, Certificates and Approvals.............................................................. 25

7.1 ATEX................................................................................................ 25

7.2 SIL Parameters ................................................................................ 25

8.0 Modbus Serial Communications ...................................................................... 26

FlameGard 5 UV/IR-E

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1.0 Introduction

1.1 General Description

Fire is a phenomenon of combustion. Combustion is the continuous chemical reaction of a
reducing agent (fuel) and an oxidizing agent (oxygen, etc.) with the evolution of thermal
energy (heat). Fire is usually manifested in heat (IR), smoke, light (visible), and flame (UV).
Flame is the gaseous region of a fire where vigorous combustion chain reactions take
place. These reactions emit radiation covering the Infrared, Ultraviolet and the Visible
Spectral Regions.

The MSA FlameGard 5 UV/IR-E is an Ultraviolet/Infrared (UV/IR) Flame Detector. It
detects the Ultraviolet and Infrared spectral regions of the flame to produce a system which
is highly immune to false alarms caused by lightning, arc-welding, hot objects, and other
sources of radiation.

The Models FlameGard 5 UV/IR-E features include:

• Compact unitised design.

• Continuous optical path monitoring.

• Wide field of view.

• High false alarm immunity.

• 0-20mA, Relays, Field Loop and Modbus RTU RS-485 serial communications output

versions.

• Visual indicators.

• Stainless Steel body with integral mounting bracket.

• Rated for continuous 90°C operation.

FlameGard 5 UV/IR-E

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1.2 Principle of Operation

UV Detector

The Flame Detector contains an ultraviolet phototube that responds to Ultra-Violet (UV)
radiation in the 185 to 260 nanometer region (Figure 2). When radiation from a flame
reaches the cathode plate within the UV detector tube, electrons are ejected from the
cathode plate. These electrons are accelerated towards the positively charged anode of
the tube. They collide with molecules of an ionisable gas, with which the tube is filled. This
emits more electrons and produces an avalanche condition. More electrons are released
which creates a momentary electron flow from the cathode to the anode. This momentary
current (pulse) recurs at a rate proportional to the intensity of the UV radiation.

The Flame Detectors process these UV signals with a microcomputer and, depending on
the version, produces the following outputs:

• 0 to 20 milliampere signal.

• Immediate WARN relay contacts.

• Time delayed ALARM relay contacts.

• FAULT relay contacts.

• RS-485 MODBUS RTU serial communications ports.

(See Sections 2 & 3 for more information on detector outputs)

FlameGard 5 UV/IR-E

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Figure 2 Spectral Response of UV and IR Detectors

UV/IR Flame Detector

The FlameGard 5 UV/IR-E is a discriminating UV/IR Detector, which makes use of an
ultraviolet radiation sensitive phototube in addition to an infrared detector (see figure 2).
This combination provides a flame detection system, which is highly immune to false
alarms.

The UV portion of the detector, as described in UV Detector, is combined with an infrared
detector, which reacts to changes in the intensity of infrared radiation. By sensing very
specific wavelengths in both the UV and IR spectra and then processing these signals with
a microcomputer, a very high degree of discrimination is achieved.

Incorporated in the IR circuitry is a flicker discrimination circuit. This permits the detector to
ignore steady IR sources such as hot objects. The inherent flickering of flame provides the
necessary modulation to activate the IR circuit.

Since a flame is a copious source of both ultraviolet and infrared radiation, discrimination is
provided when both UV and IR emissions are detected. If only UV is detected, as in the
case of arc welding, no alarm is given. If only IR is detected, such as a large modulating
hot object, no alarm is given. However, if both conditions are met in the correct
combination and intensity, as determined by an algorithm in the microcomputer, a fire is
identified and the alarm outputs are activated.

R

e

l

a

t

i

v

e

E

n

e

r

g

y

Ultraviolet Region Visible Region Infrared Region

Sun's Radiation

Reaching the Earth

Wavelength

185nm 260nm 4.35um

IR Detector's
Spectral
SensitivitySensitivity

Spectral

UV Detector's

FlameGard 5 UV/IR-E

5

COPM Circuitry

A self-testing feature called Continuous Optical Path Monitoring (COPM) checks the optical
path, the detector(s), and the related electronic circuitry once every minute. If foreign
material impairs the optical path of the UV detector tube or infrared detector for two
consecutive checks, the unit will indicate FAULT. The optical FAULT outputs are,
depending on the version, a 2.0 mA signal or de-energizing of the FAULT relay. The
FAULT status is available via the RS-485 serial communications port. (see Section 3-6
Terminal Connections). After a COPM FAULT, a COPM check is performed every ten
seconds until the obstruction is removed. Then the COPM check will resume checking
once per minute check.

WARNING – Dirty or partially blocked windows can significantly reduce the detector’s field
of view and detection distance.

NOTE: Since the optical path is checked once per minute and it requires two check failures
to produce a FAULT, it may take up to two minutes for the unit to detect an obstruction.

Alarm Test

The FlameGard 5 UV/IR-E have a built-in Alarm Test feature. This test may be activated
via the serial communications port (see Section 3-6 Terminal Connections).

The Flame Detectors will immediately go into WARN and then into time delayed ALARM.
After two to ten seconds the Flame Detectors will activate the ALARM. A latching WARN
and/or ALARM will remain latched until reset.

Visual Indicators

Two light emitting diodes (LEDs) are visible through the IR window. LEDs are provided for
a visual indication that corresponds with the detector’s outputs. The following blinking
sequence indicates the operating condition:

• Timeout (10 seconds when the unit is first powered) – Green and red LEDs blinking

alternately.

• Ready – Green LED that flashes off 1 second, every 5 seconds.

• WARNING – Slow blinking red LED.

• ALARM – Fast blinking red LED.

• COPM FAULT – Slow blinking green LED.

• Low Voltage FAULT – Fast blinking green LED.

FlameGard 5 UV/IR-E

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2.0 Specifications

2.1 System Specifications

Certification:

Ex d e IIC T4/T5 Gb Ex tb IIIC T135°C/T100°C Db IP6X
Tamb = -40°C to +90°C, -40°C to +75°C

IR Detector centre wavelength:

4.35 microns

UV Detector Pass Band:
185 to 260 nanometres

Typical Alarm Activation Response Times*:

< 3 sec. @ 50 ft. (15.2m)

Minimum Detector Response Times:

< 500 ms.

Field of View*: (Figure 3-A)

120° maximum conical

Sensitivity:

50 feet (15.2m); Maximum distance for a 1 square foot (.092m2) gasoline fire to be
reliably detected.

Maximum Cable Parameters:

4-20mA Output Signal

9000 feet (2750 m), maximum 50 Ohms loop, with maximum 250 Ohms input
impedance of readout unit.

Remote power supply

3000 feet (930 m), maximum 20 Ohms loop and 24 VDC minimum. (See Section
3-4 Terminal Connections)

Approvals:

ATEX & CE Mark, IECEx

Warranty:

Two Years

* NOTE:

1. Response Times and Field of View data have been derived by testing the

FlameGard 5 UV/IR-E with a 1 square foot gasoline fire. One cup of unleaded
gasoline on top of a one inch layer of water was ignited for each test. These are
typical values and different results may occur depending on the variation of each
fire.

2. To meet the directional dependence requirements of EN 54-10 the horizontal
viewing angle must not exceed ±30°.