Spectrex Quasar 900 User Manual

Factory Mutual

Class I Div. 1 Groups B, C, D

Class II Div. 1 Groups E, F, G

ATEX, IECEx

Ex II 2 (2) GD,

Ex d e ib [ib Gb] IIB+H2 T4 Gb

Ex tb IIIC T135°C Db

Document Ref: TM 888200, Rev. I, January 2014

218 Little Falls Rd., Cedar Grove, NJ 07009 USA;

Phone: [phone] Fax: [phone]

Web-Site: www.spectrex.net ; Email: [e-mail]

Quasar 900

Open-Path Gas Detection System

User's and Maintenance Manual

SafEyeTM Quasar 900 Gas Detector

ii

Warning: This manual should be carefully read by all
individuals who have or will have responsibility for using,
maintaining or servicing the product.

The Source and Detector are 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.

Legal Notice

The SafEye monitoring system 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.

.

Legal Notice iii

SafEyeTM Quasar 900 Gas Detector

Rev

Date

Revision History

Prepared by

Approved by

F

February

First Release

Ian Buchanan

Eric Zinn

G

June 2013

Second release

Ian Buchanan

Eric Zinn

H

August 2013

Third Release

Ian Buchanan

Eric Zinn

I

January 2014

Fourth Release

Ian Buchanan

Eric Zinn

Release History

iv Release History

About this Guide

This manual describes the Quasar 900 Open-Path Gas Detection System
and its features and provides instructions on the installation, operation and
maintenance.

This guide includes the following chapters and appendices:
 Chapter 1, Scope, provides a general introduction and overview of the

product and the guide, with a brief description of its content.

 Chapter 2, Technical Description, describes the Detector’s theory of

operation.

 Chapter 3, Operation Mode, describes the Detector’s operation

modes, user interface and indications.

 Chapter 4, Technical Specifications, describes the Detector’s

electrical, mechanical and environmental specifications.

 Chapter 5, Installation Instructions, describes how to install the

Detector, including wiring and mode settings.

 Chapter 6, Operating Instructions, describes the operating

instructions and power-up procedures.

 Chapter 7, Maintenance Instructions, contains the maintenance and

support procedures.

 Chapter 8, Troubleshooting, describes the solutions to problems that

may arise with the Detector.

 Appendix A, Wiring Option Configurations, provides wiring diagrams

for installation.

 Appendix B, Accessories, provides a list of accessories available for

the Quasar 900 Open-Path Gas Detection System.

 Appendix C, SIL-2 Features, details the special conditions to comply

with the requirements of EN 61508 for SIL-2.

About this Guide v

SafEyeTM Quasar 900 Gas Detector

Abbreviation

Meaning

ATEX

Atmosphere Explosives

AWG

American Wire Gauge

BIT

Built In Test

EMC

Electromagnetic Compatibility

EOL

End of Line

FOV

Field of View

HART

Highway Addressable Remote Transducer­communication protocol

IAD

Immune at Any Distance

IECEx

International Electrotechnical Commission Explosion

IPA

Isopropyl Alcohol

IR

Infrared

JP5

Jet Fuel

Latching

Refers to relays remaining in the ON state even after
the ON condition has been removed

LED

Light Emitting Diode

LPG

Liquefied Petroleum Gas

mA

MilliAmps (0.001 amps)

MODBUS

Master-slave messaging structure

N.C.

Normally Closed

N.O.

Normally Open

N/A

Not Applicable

NFPA

National Fire Protection Association

NPT

National Pipe Thread

SIL

Safety Integrity Level

UNC

Unified Coarse Thread

VAC

Volts Alternating Current

Abbreviations and Acronyms

vi Abbreviations and Acronyms

Table of Contents

Quasar 900 Open-Path Gas Detection System

User's and Maintenance Manual ....................................................................... i

Legal Notice .................................................................................................... iii

Release History ............................................................................................... iv

About this Guide .............................................................................................. v

Abbreviations and Acronyms ............................................................................. vi

1 Scope ......................................................................................................... 1

1.1 Product Overview ................................................................................... 1

2 Technical Description ................................................................................ 3

2.1 Features ............................................................................................... 3

2.2 Applications ........................................................................................... 4

2.3 Principle of Operation ............................................................................. 4

2.3.1 Definitions of Terms ......................................................................... 4

2.3.2 Spectral Finger Print ......................................................................... 4

2.3.3 Optical Path .................................................................................... 5

2.3.4 Microprocessor Based ....................................................................... 5

2.3.5 Gas Sensitivity ................................................................................ 5

2.3.6 Gas Calibration ................................................................................ 5

2.3.7 Flash Source ................................................................................... 5

2.3.8 Heated Optics .................................................................................. 6

2.3.9 HART Protocol ................................................................................. 6

2.3.10 Handheld Unit ................................................................................. 6

2.3.11 Modbus RS-485 ............................................................................... 7

2.3.12 Tilt Mount ....................................................................................... 7

2.4 Product Certification ............................................................................... 7

2.4.1 ATEX, IECEx .................................................................................... 7

2.4.2 FM / FMC ........................................................................................ 8

2.4.3 SIL-2 .............................................................................................. 8

2.4.4 Functional Test ................................................................................ 8

2.5 Models and Types .................................................................................. 8

2.6 Description ............................................................................................ 9

2.6.1 Flash Source Unit ............................................................................ 10

2.6.2 Detector Unit .................................................................................. 11

Table of Contents vii

SafEyeTM Quasar 900 Gas Detector

3 Operating Modes...................................................................................... 13

3.1 Operational Modes ................................................................................ 13

3.1.1 Normal Mode .................................................................................. 13

3.1.2 Maintenance Call Mode (3mA Output) ................................................ 13

3.1.3 Fault Mode ..................................................................................... 14

3.1.4 Zero Calibration Mode (1mA Output) ................................................. 14

3.2 Visual Indicators ................................................................................... 15

3.3 Output Signals ...................................................................................... 15

3.3.1 0-20mA Current Output ................................................................... 15

3.3.2 RS-485 Interface ............................................................................ 16

3.4 System Setup ....................................................................................... 16

3.4.1 Detection Function Programming ...................................................... 16

3.4.2 Detection Setup Function ................................................................. 17

3.4.3 Detector Default Setup .................................................................... 18

4 Technical Specifications ........................................................................... 19

4.1 General Specifications ........................................................................... 19

4.2 Electrical Specifications .......................................................................... 20

4.2.1 Power Consumption ........................................................................ 20

4.2.2 Electrical input protection ................................................................ 20

4.2.3 Electrical outputs ............................................................................ 20

4.3 Mechanical Specifications ....................................................................... 21

4.4 Environmental Specifications .................................................................. 22

4.4.1 High Temperature ........................................................................... 22

4.4.2 Low Temperature ............................................................................ 22

4.4.3 Humidity ........................................................................................ 22

4.4.4 Salt and Fog ................................................................................... 22

4.4.5 Water and Dust .............................................................................. 22

4.4.6 Shock and Vibration ........................................................................ 22

4.4.7 Electromagnetic Compatibility (EMC) ................................................. 23

5 Installation Instructions .......................................................................... 25

5.1 Introduction ......................................................................................... 25

5.2 General Considerations .......................................................................... 25

5.2.1 Personnel ....................................................................................... 25

5.2.2 Tools Required................................................................................ 25

5.2.3 Site Requirements .......................................................................... 26

viii Table of Contents

TM 888200 Rev (I), January 2014

5.2.4 The Source and Detector ................................................................. 26

5.2.5 Guidance Tips for Gas Detector Locations........................................... 26

5.3 Preparations for Installation ................................................................... 26

5.4 Certification Instructions ........................................................................ 28

5.5 Conduit/Cable Installation ...................................................................... 29

5.6 Detector/Source Mounting ...................................................................... 29

5.6.1 Tilt Kit P/N 888270.......................................................................... 29

5.6.2 Detector/Source Installation ............................................................. 29

5.7 Detector Wiring .................................................................................... 30

5.8 Detector Terminal Wiring ....................................................................... 34

5.9 Flash Source Wiring............................................................................... 34

5.9.1 Wiring ........................................................................................... 34

5.9.2 Terminal Wiring .............................................................................. 35

6 Operating Instructions ............................................................................ 37

6.1 SafEye Operation .................................................................................. 37

6.2 Alignment of Unit .................................................................................. 37

6.3 Powering up the System ........................................................................ 38

6.4 Safety Precautions ................................................................................ 39

6.5 Signal Verification ................................................................................. 39

6.5.1 Signal Values Limitation ................................................................... 39

6.6 Zero Calibration .................................................................................... 40

6.7 Functional Check of Unit ........................................................................ 41

7 Maintenance Instructions ........................................................................ 43

7.1 General Maintenance ............................................................................. 43

7.2 Periodic Maintenance ............................................................................. 43

7.2.1 Routine Optical Surface Cleaning ...................................................... 44

7.2.2 Signal Verification ........................................................................... 44

7.2.3 Function Check of Unit ..................................................................... 44

8 Troubleshooting ...................................................................................... 45

Appendices .................................................................................................... 47

A Wiring Configurations .............................................................................. 49

A.1 RS-485 Communication Network ............................................................. 53

Table of Contents ix

SafEyeTM Quasar 900 Gas Detector

B Accessories .............................................................................................. 55

B.1 Tilt Mount P/N 888270 ........................................................................... 55

B.2 Pole Mount (U-Bolt 5 inch) P/N 799225 .................................................... 55

B.3 Commissioning Kit P/N 888247 ............................................................... 55

B.4 RS485 Hand-Held Diagnostic Unit P/N 799810 .......................................... 55

B.5 HART Hand-Held Diagnostic Unit P/N 888810 ........................................... 56

B.6 HART Hand-Held Harness Kit P/N 888815 ................................................ 56

B.7 USB/RS485 Harness Converter Kit P/N 794079-8 ...................................... 56

B.8 Mini Laptop Kit P/N 777820 .................................................................... 56

B.9 Sunshade P/N 888263 ........................................................................... 56

C SIL-2 Features ......................................................................................... 57

C.1 Safety Relevant Parameters for the Quasar 900 Open Path Gas Detector ..... 57

C.2 General Conditions for Safe Use .............................................................. 58

Technical Support ......................................................................................... 59

x Table of Contents

TM 888200 Rev (I), January 2014

List of Figures

Figure 1: P/N Definition of Quasar 900 .................................................................. 9

Figure 2: Flash Source ....................................................................................... 10

Figure 3: Detector ............................................................................................. 11

Figure 4: Tilt Mount ........................................................................................... 31

Figure 5: Detector and Tilt Mount Assembly .......................................................... 32

Figure 6: Detector with Cover Removed ............................................................... 33

Figure 7: Source with Cover Removed ................................................................. 35

Figure 8: Magnetic Mode Selector ........................................................................ 40

Figure 9: Detector Wiring Terminal ...................................................................... 49

Figure 10: Source Wiring Terminal ...................................................................... 50

Figure 11: 0-20mA Sink 4-Wire........................................................................... 51

Figure 12: 0-20mA Non-isolated Sink 3-Wire ........................................................ 51

Figure 13: 0-20mA Source 3-Wire ....................................................................... 52

Figure 14: RS-485 Networking for Wiring Option 3 ................................................ 53

List of Figures xi

SafEyeTM Quasar 900 Gas Detector

List of Tables

Table 1: Gas Concentrations Measurement Terms .................................................. 4

Table 2: Model Numbers and Installation Distances ................................................ 8

Table 3: Detector LED Indications ....................................................................... 15

Table 4: Source LED Indications .......................................................................... 15

Table 5: Standard (default) 0-20mA Current for the Gas Channel ............................ 16

Table 6: Detector Default Set Up ......................................................................... 18

Table 7: Source Default Set Up ........................................................................... 18

Table 8: Detection Distance Range ...................................................................... 19

Table 9: Detector and Source Maximum Power Consumption .................................. 20

Table 10: Tilt Mount Kit ...................................................................................... 29

Table 11: Wiring Options .................................................................................... 34

Table 12: Flash Source Wiring Options ................................................................. 35

Table 13: Maintenance Channels Limit Values ....................................................... 39

Table 14: Troubleshooting .................................................................................. 45

xii List of Tables

Product Overview

page 1

1 Scope

➣ In this chapter…

1.1 Product Overview

The SafEye Quasar 900 IR Open-Path Gas Detector employs an advanced
Xenon Flash Source and integrated electronics package, both housed in
improved, Stainless steel housings to provide high quality and performance,
fast response, line of sight gas monitoring. This high quality is backed by 3
years warranty for the complete SafEye system and 10 years for the Xenon
Flash source bulb.

Quasar 900 detects ambient combustible gases over a path length of up to
660ft. (200 m), even in harsh environments where dust, fog, rain, snow or
vibration can cause a high reduction of signal. The SafEye Quasar 900 can
maintain operation in up to 90% signal obscuration and ±0.5 degree of
misalignment.

Quasar 900 is manufactured only in stainless steel with heated optical
window to improve performance in icing, snow, and condensation
conditions. The programmable functions are available through a RS 485 or
HART port used with Host software supplied by Spectrex and a standard PC
or an I.S handheld unit.

The Quasar Source and Detector unit enclosures are ATEX and IECEx
approved Exd flameproof with an integral segregated rear, Exe terminal
compartment which avoids exposure of the sensors and electronics to
surrounding environment. The Detector also has a plug interface for
connection to handheld PC or HART handheld, which is intrinsically safe.
Hence the combined approval - Ex d e ib [ib Gb] IIB+H2 T4 Gb, Ex tb IIIC
T135°C Db IP66.

This manual consists of a full description of the Detector and its features. It
contains instructions on the installation, operation and maintenance.

 To use the WinHost software to change the required functions and for

maintenance, refer to Manual TM 888050 for instructions

 To use the I.S Handheld Unit to change the required functions and for

maintenance, refer to Manual TM 799060 for instructions.

 To use HART Protocol to change the required functions and for

maintenance refer to Manual TM 888030. The HART can be connected on
the 0-20mA line or through the IS port for setting

Product Overview 1

SafEyeTM Quasar 900 Gas Detector

2 Product Overview

Features

page 3

Applications

page 4

Principle of Operation

page 4

Product Certification

page 7

Models and Types

page 8

Description

page 9

2 Technical Description

➣ In this chapter…

2.1 Features

 Long Range Gas Detection up to 660ft (200m)
 Simultaneous detection of C1-C8 flammable gases
 High Sensitivity and fast response to Hydrocarbon gases
 Heated optics to improve performance in icing, condensation and snow

conditions

 Continuous operation in extreme and harsh environmental
 Conditions
 Solar blind and immune to industrial environments
 Withstands extreme vibration conditions
 Standard 0-20 mA Output
 HART Protocol: Communication Protocol
 RS-485 Output Modbus compatible for PC Communication Network for a

maximum of 247 systems

 Simple one person installation, alignment, and calibration
 ATEX & IECEx per EX II 2 GD, Ex d e ib [ib Gb] IIB+H2 T4 Gb, Ex tb IIIC

T135°C Db IP66

Features 3

 TUV approved per SIL2 requirements
 FM / FMC approved per: Class I Div. 1 Group B, C and D; Class II/III

Div. 1 Group E, F and G

 Functional approved per FM 6325
 Functional tested by FM per EN60079-29-4
 Programmable configuration via the handheld unit
 Fast connection to I.S. approved handheld diagnostic/calibration unit
 (3mA) “maintenance call”
 Warranty 3 years for the complete SafEye system
 Warranty 10 years for Xenon Flash bulb

SafEyeTM Quasar 900 Gas Detector

Term

Description

LEL

Lower Explosive Limit: The minimum concentration of a
substance (gas/vapor) in air mixture that can be ignited.
This mixture is different for every gas/vapor, measured in
% of LEL.

LEL.m

Integral of Concentration in LEL units (1 LEL = 100% LEL)
and the operation distance in meters (m).

2.2 Applications

The Quasar 900 system may be used to monitor flammable gas
concentration in various applications, such as:

 Petrochemical, pharmaceutical and other chemical storage and

production areas.

 Flammable and toxic chemical storage sites and hazardous waste

disposal areas.

 Refineries, oil platforms, pipelines, refueling stations and fuel storage

facilities.

 Hazardous loading docks, transportation depots and shipping

warehouses

 Engine rooms
 Compressor and pumping stations
 Test cells
 LNG-LPG Systems
 Offshore Floating Production Storage and Shipping vessels (FPSO), and

fixed oil rigs.

2.3 Principle of Operation

The Quasar system detects gases through a dual spectral range monitoring,
analyzing the absorption of radiation caused by gases in the atmosphere
and comparing it (ratio) to background atmospheric absorption.

2.3.1 Definitions of Terms

The following list defines gas concentrations measurement terms that are
used in this manual:

Table 1: Gas Concentrations Measurement Terms

2.3.2 Spectral Finger Print

Each hazardous material is detected at a specific wavelength selected
according to its specific spectral absorption or "finger print". The detection
process involves two separate filters, one transmitting radiation that is
absorbed by a particular gas and one that is not sensitive to it.

4 Applications

TM 888200 Rev (I), January 2014

2.3.3 Optical Path

The presence of hazardous airborne vapors, gases, or aerosols in a
monitored area is detected when the defined substance crosses/enters the
optical path between the radiation source unit and the detector.

Hazardous gases /vapors present in the atmosphere cause absorption of the
radiation pulse in the optical path between the radiating source and the
detector unit at some specific wavelengths. This causes a change in the
signal intensity received by the detector, which is translated into an output
related to the detector’s measuring scale.

The system analyzes the defined open path at the spectral bands specific to
the materials being monitored. The Automatic Gain Control (AGC) unit
compensates for environmental disturbances such as fog, rain, etc., through
a constant comparison with its dual spectral beam.

2.3.4 Microprocessor Based

The incoming signals are analyzed by the built in microprocessor.
A sophisticated mathematical algorithm calculates between the various
functions of the detected signal thresholds. Statistics, ratio algorithms, data
communications, diagnostics and other functions are performed.

2.3.5 Gas Sensitivity

The SafEye Quasar 900 Model uses wavelengths around 2.3µ spectral band
to measure air flammability potential between the source and detector. At
this wavelength, all hydrocarbon materials have an absorption peak. This
enables the detector to achieve both regular sensitivity of 0-5 LEL.m.

The Quasar 900 detects hydrocarbon gases including methane, ethylene,
propane, ethane, butane, and so on.

2.3.6 Gas Calibration

The Quasar 900 has three calibrations that can be changed by function
Setup:

 Gas 1 – 100% methane
 Gas 2 – 100% propane
 Gas 3 – 100% ethylene

The full scale of methane and propane is 5 LEL.m.
The full scale of ethylene is 8 LEL.m.

2.3.7 Flash Source

The Xenon Flash Source was originally introduced in the first SafEye
development and was designed to overcome false alarms, which were
experienced by early generations of the open path system. The new SafEye
Quasar 900 employs the latest generation of flash bulbs to provide even
more power and extended operation life (10 years).

Principle of Operation 5

SafEyeTM Quasar 900 Gas Detector

2.3.8 Heated Optics

SafEye Quasar includes heated optics for the Detector and source. The
heater increases the temperature of the optical surface by 5-8°F (3-5°C)
above the ambient temperature to improve performance in icing,
condensation and snow conditions. The heated optics is configured to
automatically operate when the change in temperature requires the heating
(default).

However, the heated optics can be defined as one of the following modes:

1 Not operated (not an option on source unit)
2 On continuously
3 Automatic, per temperature change (default)

See System Setup, page 16.

When operated ‘per temperature change’, the user can define the start

temperature below which the window will be heated (default 41°F (5°C)).
This temperature can be defined between 32°F (0°C) to 122°F (50°C). The
heating will stop when the temperature is 27°F (15°C) above the start
temperature.

2.3.9 HART Protocol

The Quasar 900 uses the HART Protocol.
HART Communication is a bi-directional industrial field communication

protocol used to communicate between intelligent field instruments and host
systems. HART is the global standard for smart instrumentation and the
majority of smart field devices installed in plants worldwide are HART­enabled.

HART technology is easy to use and very reliable.
Through the HART connection, the SafEye is able to perform:

 Detector set-up
 Detector troubleshooting
 Detector health and status

For more details, refer to the HART Manual TM 888030.
The HART communication can be connected on the 0-20mA line or through

the IS connection with a standard Handheld loaded with our host software
and a special harness.

2.3.10 Handheld Unit

The I.S.-approved handheld diagnostics unit (Part no. 799810) is available
to make installation and maintenance easier. This is an all-on-one diagnostic
/ calibration / interrogation plug-in unit that allows for one-person
installation and maintenance.

6 Principle of Operation

TM 888200 Rev (I), January 2014

The handheld unit can be used:

1 For on-site function programming and set up changes to the Detector.

2 During installation, the handheld unit will display all the detector’s

parameters and confirm that the installation has been completed
successfully. It is also required to perform the necessary Zero
calibration function

3 For Maintenance and Trouble Shooting – The handheld unit will provide

recommendation of maintenance action to overcome and optimize the
Detector’s performance.

For more details, refer to Manual TM 799060.

2.3.11 Modbus RS-485

For more advanced communications, the Quasar 900 has a RS-485 Modbus­compatible output that provides data communication from a network (up to
247 Detectors) to a host computer or universal controller for central
monitoring. This feature enables easy maintenance, local and remote
diagnostic tools.

2.3.12 Tilt Mount

The new design stainless steel tilt mount provides a smaller installation
footprint that can conform to limited space constraints, while the sturdy
construction maintains alignment even in constant vibration. The improved
‘X’ and ‘Y’ axis worm-gear adjustments provide quick and easy alignment for
installation and maintenance procedures.

2.4 Product Certification

The open path Quasar 900 is approved for the following certification:

 ATEX, IECEx, page 7
 FM / FMC, page 8
 SIL-2, page 8
 Functional Test, page 8

2.4.1 ATEX, IECEx

The Quasar 900 is ATEX approved per SIRA 12ATEX1212X and IECEx per
IECEx SIR 12.0086X per:

 ATEX Ex II 2 GD

Ex d e ib [ib Gb] IIB+H2 T4 Gb

Ex tb IIIC T135°C Db IP66
 T Ambient –55°C to +65°C
This product is suitable to use in hazardous zones 1 and 2 with IIB+H2

group vapors present.

Product Certification 7

SafEyeTM Quasar 900 Gas Detector

Model

No.

Detector

Source

Min.

Installation

Distance

Max.

Installation

Distance

901

QR-X-11X

QT-X-11X

23 ft (7 m)

66 ft. (20 m)

902

QR-X-11X

QT-X-21X

50 ft (15 m)

132 ft. (40 m)

903

QR-X-11X

QT-X-31X

115 ft (35 m)

330 ft. (100m)

904

QR-X-11X

QT-X-41X

265 ft (80 m)

660 ft. (200 m)

2.4.2 FM / FMC

The Quasar 900 is approved to FM / FMC Explosion Proof per:

 Class I, Div. 1 Group B, C and D, T6 -58°F (-50°C) ≤ Ta ≤ 149°F (65°C)
 Dust Ignition Proof – Class II/III Div. 1, Group E, F and G.
 Ingress Protection – IP66 & IP68, NEMA 250 Type 6P.

IP68 is rated for 2 meter depth for 45 minutes.

2.4.3 SIL-2

The Quasar 900 Is TUV approved for SIL2 requirements per IEC 61508.
The alert condition according to SIL-2 can be implemented by alert signal

via 0-20mA current loop.
For more details and guidelines on configuring, installing, operating and

servicing, see SIL-2 Features, page 57, and TUV report no. 968/EZ

619.00/13.

2.4.4 Functional Test

The Quasar 900 was functional approved per FM 6325
The Quasar 900 was functional tested by FM per EN60079-29-4

2.5 Models and Types

The Quasar 900 includes 4 models with the same detector and different
source. That gives the ability to get detection at distances of 7-200m.

Table 2: Model Numbers and Installation Distances

8 Models and Types

TM 888200 Rev (I), January 2014

Figure 1: P/N Definition of Quasar 900

2.6 Description

The SafEye comprises two main units:

 The Flash Infrared Source (Transmitter)
 The Infrared Detector (Receiver)

Quasar 900 detects gases over an open path transmitted from the Flash
Source to the Detector.

Description 9

SafEyeTM Quasar 900 Gas Detector

1

Front Window Section

6

Back Cover

2

Label

7

Earth Terminal

3

Main Housing

8

Front Window

4

Mounting Plate

10

Cable Inlet

5

Junction Box

11

Indication Led

2.6.1 Flash Source Unit

The Flash Source unit emits IR radiation pulses at the rate of two pulses per
second. The pulse width (5-10µsec) is very powerful. The front of the
source SafEye has a lens that collimates the IR beam for maximum
intensity. The front window is heated to improve performance in icing,
condensation and snow conditions.

There are four source types:

 For Short Range –901 – source P/N QT-X-11X
 For Medium Range 1- 901 – source P/N QT-X-21X
 For Medium Range 2- 903 – source P/N QT-X-31X
 For Long Range - 904 – source P/N QT-X-41X

Figure 2: Flash Source

The sources for models 901, 902 and 903 are the same electronically and
optically. The only difference is in the apparatus

The source for model 904 has different optics with different XENON lamp
source.

10 Description

TM 888200 Rev (I), January 2014

1

Front Window Section

7

Earth Terminal

2

Label

8

Front Window

3

Main Housing

9

Handheld Fast Connection

4

Mounting Plate

10

Cable Inlet

5

Junction Box

11

Indication Led

6

Back Cover

2.6.2 Detector Unit

The Detector receives the transmitted pulsed radiation signals from the
Flash Source. The signals are then amplified and fed into an analog to digital
signal converter to be processed by the internal microprocessor. When the
signals drop below a prescribed level, the internal microprocessor will
compensate for them. This will allow the signal to be maintained even in
severe weather conditions. The data is sent to the output interface section.

The front window of the Detector is heated to improve performance in icing,
condensation and snow conditions.

There is one detector type that is suitable for all Quasar models 901, 902,
903 and 904 – P/N QR-X-11X.

Figure 3: Detector

Description 11

SafEyeTM Quasar 900 Gas Detector

12 Description

Operational Modes

page 13

Visual Indicators

page 15

Output Signals

page 15

System Setup

page 16

3 Operating Modes

➣ In this chapter…

3.1 Operational Modes

The Quasar 900 has four operational modes:

 Normal Mode, page 13
 Maintenance Call Mode (3mA Output), page 13
 Fault Mode, page 14
 Zero Calibration Mode (1mA Output), page 14

3.1.1 Normal Mode

This mode is used for gas detection. In normal mode, the following statuses
are possible:

 Normal - Signal received from gas detection is at safe levels.
 Warning* - Gases have been detected at warning levels.
 Alarm* - Gases have been detected at alarm levels.

Note: For the standard 0-20mA output, the Warning and Alarm levels are
not relevant. The user chooses these alarm levels at the controller. The
output Detector will be 4mA at zero reading and 20mA for full-scale reading.

Warning and Alarm states are relevant where the stepped 0-20mA output is
used and will energize the warning and alarm relays.

If the RS485 output is used, the Detector changes its status from ‘N’ to ‘W’

at Warning level and to ‘A’ at Alarm.

3.1.2 Maintenance Call Mode (3mA Output)

This mode indicates low signal or low signal ratio that may be caused by a
dirty window; misalignment; poor source or that one of the Detectors
parameters is at the ‘limit’ value.

Operational Modes 13

The Detector continues to function and reads any gas present, but provides
a (3mA) pre-warning signal that a maintenance procedure is required.

SafEyeTM Quasar 900 Gas Detector

3.1.3 Fault Mode

In the Fault status, there are three fault types:

 Fault 1 (2mA Output) – Non critical

If this occurs, it is due to blockage, very low signal or in the case of

partial obscuration or full beam block and detection is no longer

possible. The Detector’s proper operation can be restored (Auto reset)

during operation if the condition causing the problem is removed or

resolved. This mode will occur after a delay of 60 sec. from the moment

of the fault. This delay is important to eliminate momentary obscuration

due to passing through the beam.

 Fault 2 (2.5mA) - Misalignment

This occurs due to poor alignment.
 Low Voltage Fault (1mA Output)

In this case, detection is disabled due to low voltage being supplied to

the Detector. The Detector returns to proper operation only when proper

voltage level restored.

 Fault 2 (1mA Output) – Critical

In this case, the detection is disabled due to electrical / software

operational failure or central device (memory, processor) fault. Such

fault causes the Detector to cease operation. In case of fault in 0-20mA

loop, the output will be 0mA.

3.1.4 Zero Calibration Mode (1mA Output)

This mode zeros the base level from which the Detector will read gas.
It should only be performed when there are:

 No combustible gases present
 Clear path between the Flash Source and Detector
 Clear weather conditions.

Zero calibration must be done after installation, re-alignment and window
cleaning, using the handheld unit (or Host software on PC).

14 Operational Modes

TM 888200 Rev (I), January 2014

Detector Status

LED Color

LED Mode

Fault

Yellow

4Hz – flashing

Alignment / Standby

Yellow

1Hz – flashing

Zero Calibration

Yellow

Constant

Normal

Green

1Hz – flashing

Warning

Red

2Hz – flashing

Alarm

Red

Steady

Source Status

LED Color

LED Mode

Fault

Yellow

4Hz – flashing

Normal

Green

1Hz – flashing

3.2 Visual Indicators

One 3-color LED indicator is located in the back side of the detector/source
and can be seen through the back cover window. See Figure 2 and
Figure 3, item 11.

The detector statuses are listed in Table 3.

Table 3: Detector LED Indications

The source statuses are listed in Table 4.

Table 4: Source LED Indications

3.3 Output Signals

The SafEye system provides the following outputs:

 0-20mA Current Output, page 15
 RS-485 Interface, page 16

3.3.1 0-20mA Current Output

The 0-20mA output provides the detector status measurement showing a
continuous reading of exact gas concentration.

The 0-20mA functions as current sink, but it can be configured as Source
(see Appendix A).

The maximum permitted load resistance for the 0-20mA output is 600Ω.

Visual Indicators 15

SafEyeTM Quasar 900 Gas Detector

Current Reading

Status and Description

0mA +0.3mA

Fault in 0-20mA loop

1mA ±0.3mA

Zero Calibration (In Progress), Fault 2

2mA ±0.3mA

Fault 1 (non-Critical)

2.5mA ± 0.3mA

Misalignment fault

3mA ±0.3mA

“Maintenance Call”

4mA±0.5mA

No gas present

4-20mA

Continuous measuring of gas concentration at a
range between 0 and full scale. For methane and
propane

This translates to 3.2mA per LEL.m and for ethylene
to 2mA per LEL.m.

21mA

Concentration is over the range limit (more than full­scale concentration).

Table 5: Standard (default) 0-20mA Current for the Gas Channel

3.3.2 RS-485 Interface

The RS-485 input/output sends complete data information to a PC and
receives data or control commands from the PC. The protocol is Modbus
compatible. The communication with the PC that is operated through the
interface is executed only when used with appropriate host software.

3.4 System Setup

This section includes the following topics:

 Detection Function Programming, page 16
 Detection Setup Function, page 17
 Detector Default Setup, page 18

3.4.1 Detection Function Programming

The SafEye Quasar 900 incorporates several functions that can be set by the
customer using:

 Host software. Refer to manual TM 888050 for programming

instructions.
 Handheld unit (P/N 799810). Refer to manual TM 799060 for

programming instructions. The connection of the handheld to the

detector is fast and intrinsically safe and allows function change with no

need to open the detector.

16 System Setup

TM 888200 Rev (I), January 2014

3.4.2 Detection Setup Function

See Detector Default Setup, page 18 for default settings.
Setup includes the following options:

 Gas Calibration, page 17
 Zero Calibration, page 17
 Address Setup, page 17
 Heated Optic Operation, page 17

3.4.2.1 Gas Calibration

Three gas types can be selected for maximum compatibility to the required
measured gas(es).

Gas Types:

 Methane – full scale 5 LEL.m.
 Propane – full scale 5 LEL.m.
 Ethylene – full scale 8 LEL.m.

These three calibrations are standard calibrations.

3.4.2.2 Zero Calibration

 Enable – Zero calibration is performed according to background
 Disable – The Detectors are not updated due to change of background

3.4.2.3 Address Setup

The Detector provides up to 247 addresses that can be used in RS-485
communication link.

3.4.2.4 Heated Optic Operation

The heated optics for the Detector unit can be defined as one of the
following modes:

 OFF -Not operated
 ON -Operated continuously
 AUTO - On, per temperature change (default)

When operated per temperature change, the user can define the start
temperature below which the window will be heated between 0 to 50°C. The
Detector will stop heating the window when the temperature will be 15°C
above the defined temperature.

This feature relates to the Detector only.
The Source heated optic must be defined with the order in two options:

 Heated continuously.
 Start heating below 41°F (5°C). (default)

System Setup 17

SafEyeTM Quasar 900 Gas Detector

Function

Setup

Gas Type

1

BG Zero Calibration

Enabled

0-20mA

Continuous

Heat mode

Auto

Heat on

5

Function

Setup

Heat mode

Auto

Heat on

5

3.4.3 Detector Default Setup

The Detector has 8 functions that can be programmed according to the
customer requirement at factory or at customer facility using a software
Host or a handheld unit. The standard set up is as follows:

Table 6: Detector Default Set Up

Table 7: Source Default Set Up

The Source default can be changed with the same Host.

18 System Setup

General Specifications

page 19

Electrical Specifications

page 20

Mechanical Specifications

page 21

Environmental Specifications

page 22

Detected Gases:

Simultaneous detection of C1-C8
flammable gases

Detection Distance range:

Table 8

Model

No.

Detector

Source

Min.

Installation

Distance

Max.

Installation

Distance

901

QR-X-11X

QT-X-11X

23 ft (7 m)

66 ft (20 m)

902

QR-X-11X

QT-X-21X

50 ft (15 m)

132 ft (40 m)

903

QR-X-11X

QT-X-31X

115 ft (35 m)

330 ft (100m)

904

QR-X-11X

QT-X-41X

265 ft (80 m)

660 ft (200m)

Response Time:

3 sec to T90

Spectral Response:

2.0 - 3.0 micron

Sensitivity Range:

Full
Scale
LEL.m.

Warning
LEL.m.

Alarm
LEL.m.

Gas 1

Methane

5 1 3

Gas 2

Propane

5 1 3

Gas 3

Ethylene

8

1.6

4.8

Field of View:

Line of Sight

Alignment
Tolerance:

± 0.5°

Drift:

± 7.5% of the reading or ±4% of the full scale
(whichever is greater)

Minimum Detectable
Level:

0.15 LEL.m

Temperature Range:

-67°F (-55°C) to +149°F (+65°C)

4 Technical Specifications

➣ In this chapter…

4.1 General Specifications

Table 8: Detection Distance Range

General Specifications 19

SafEyeTM Quasar 900 Gas Detector

Immunity to false
alarm:

Does not produce false alarm and is not
influenced by Solar Radiation, Hydrocarbon
Flames and other external IR Radiation Sources.

Operating Voltage:

18-32 VDC

Without Heated
Optic (Max.)

With Heated
Optic (Max.)

Detector

200mA

250mA

Source

200mA

250mA

4.2 Electrical Specifications

4.2.1 Power Consumption

Table 9: Detector and Source Maximum Power Consumption

4.2.2 Electrical input protection

The input circuit is protected against voltage-reversed polarity, voltage
transients, surges and spikes according to EN50270.

4.2.3 Electrical outputs

4.2.3.1 0-20mA Current Output

The 0-20mA is isolated sink option. This output can be configured as Source
(see Appendix A).

The maximum permitted load resistance is 600 ohm.

4.2.3.2 Communication Network

The Detector is equipped with an RS 485-communication link that can be
used in installations with computerized controllers.

Communication is compatible with the Modbus protocol:

 This protocol is a standard and is widely used.
 It enables continuous communication between a single standard Modbus

controller (Master device) and a serial Network of up to 247 Detectors.
 It enables connection between different types of Spectrex Detectors or

other Modbus devices to the same Network.

4.2.3.3 HART Protocol

The HART Protocol is a digital communication signal at low level on top of
the 0-20mA.

This is a bi-directional field communications protocol used to communicate
between intelligent field instruments and the Host System.

20 Electrical Specifications

TM 888200 Rev (I), January 2014

Enclosure:

The Detector, Source and tilt mount are St. St. 316
Electro chemical and passivized coating.

Explosion Proof:

ATEX &
IECEx

EX II 2 GD,

Ex d e ib [ib Gb] IIB+H2 T4 Gb
Ex tb IIIC T135°C Db IP66

FM/FMC

Class I Div. 1 Groups B, C, and D

Class II/III Div. 1 Groups E, F, and G
T6 -58°F (-50°C) ≤ Ta ≤ 149°F (65°C)

Functional
Testing:

Approved per FM 6325
Tested by FM per EN60079-29-4

Water and Dust
Tight:

IP 66 and IP 68

IP68 is rated for 2 meter depth for 45 minutes.

NEMA 250 type 6p

Electrical
Modules:

Conformal coated

Electrical
Connection:

(Two options - specified at time of order)

2 X M25 (ISO)

2 X 3/4” - 14NPT conduits

Dimensions:

Detector

10.5 x 5.1 x 5.1 in

(267 x 130 x 130mm)

Source

10.5 x 5.1 x 5.1 in

(267 x 130 x 130mm)

Tilt Mount

4.7 x 4.7 x 5.5 in

(120 x 120 x 40mm)

Weight:

Detector

11 lb

(5 kg)

Source

11 lb

(5 kg)

Tilt Mount

4.2 lb

(1.9 kg)

Through the HART Protocol the detector can:

 Display set-up
 Reconfigure set-up
 Display detector status and definition
 Perform detector diagnostic
 Troubleshooting

4.3 Mechanical Specifications

Mechanical Specifications 21

SafEyeTM Quasar 900 Gas Detector

Operating Temperature:

+149 ºF (+65 ºC)

Storage Temperature:

+149 ºF (+65 ºC)

Operating Temperature:

-4 ºF (-20 ºC)

Storage Temperature:

-40 ºF (-40 ºC)

Dust:

Totally protected against dust

Liquids:

Protected against immersion between 15
cm and 1m in depth. Protected against
all water jets from all directions.

Vibration:

Designed to meet MIL-STD-810C,
method 514.2, procedure VIII.

Mechanical Shock:

Designed to meet MIL-STD-810C,
method 516.1, procedure I.

4.4 Environmental Specifications

The SafEye system is designed to withstand harsh environmental conditions.
The source and detector units compensate for adverse conditions while
maintaining accuracy.

4.4.1 High Temperature

Designed to meet MIL-STD-810C, method 501.1 procedure II.

4.4.2 Low Temperature

Designed to meet MIL-STD-810C, method 502.1, procedure I

4.4.3 Humidity

Designed to meet MIL-STD-810C, method 507.1, procedure IV
relative humidity of up to 95% for the operational temperature range.

4.4.4 Salt and Fog

Designed to meet MIL-STD-810C, method 509.1 procedure I.
Exposure to a 5% salt solution for 48 hours.

4.4.5 Water and Dust

 IP67 per EN60529
 IP66 per EN60529

4.4.6 Shock and Vibration

22 Environmental Specifications

TM 888200 Rev (I), January 2014

Radiated Emission:

EN55022

Conducted Emission:

EN55022

Radiated Immunity:

EN61000-4-3

Conducted Immunity:

EN61000-4-6

ESD:

EN61000-4-2

Burst:

EN61000-4-4

Surge:

EN61000-4-5

Magnetic Field:

EN61000-4-8

4.4.7 Electromagnetic Compatibility (EMC)

This product is in conformance with EMC per EN50270:

Environmental Specifications 23

SafEyeTM Quasar 900 Gas Detector

24 Environmental Specifications

Introduction

page 25

General Considerations

page 25

Preparations for Installation

page 26

Certification Instructions

page 28

Conduit/Cable Installation

page 29

Detector/Source Mounting

page 29

Detector Wiring

page 30

Detector Terminal Wiring

page 34

Flash Source Wiring

page 34

5 Installation Instructions

➣ In this chapter…

5.1 Introduction

The Detector and Flash Source units can be installed and maintained with
the use of general-purpose common tools and equipment. The installation
procedure has to be performed by suitably qualified personnel.

This section 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 suitably qualified personnel. Special
safety precautions are stressed wherever applicable.

5.2 General Considerations

5.2.1 Personnel

Only suitably qualified personnel, familiar with the local codes and practices,
trained for gas detection maintenance should be employed. Wiring should
only be performed or supervised by someone with knowledge of electronics
and in particular wiring installation.

5.2.2 Tools Required

The SafEye system requires the following tools:
 Set of screwdrivers

Introduction 25

 Set of hex keys/Allan wrenches (supply with commissioning kit)
 Voltage Multimeter

SafEyeTM Quasar 900 Gas Detector

5.2.3 Site Requirements

The installation position of the SafEye system must take into account if the
gas being monitored is heavier or lighter than air, and the individual site
requirements. The site selected must give the Detector a direct view to the
Source. The mounting point for each item should be secure and stable with
minimal vibrations. Equipment should be either mounted in a position where
it cannot be knocked out of alignment, or guarded from physical impact.

5.2.4 The Source and Detector

The appropriate Detector should be selected for the length of open path to
be monitored. To allow for ageing of the Source and a reduction of the IR
signal due to adverse weather we recommend using a Detector that is not at
the limit of its operating range.

The open path between the Source and Detector and the immediate
surroundings should be kept clear of obscuration that might hinder the free
movement of air in the protected area or block the infrared beam.

5.2.5 Guidance Tips for Gas Detector Locations

Guidance Tips for Gas Detector locations in order to provide the best
detection coverage:

 Below potential leak source for heavier than air gases
 Above potential leak sources for lighter than air gases
 Near to leak sources along the expected leak trajectory, taking into

account prevailing wind directions

 Between leak source and potential ignition sources
 In area with expected heavy fog, rain or snow, consider the effect of

long range installation and install the Detector at shorter range with the

maximum intensity model available.

5.3 Preparations for Installation

Installation should comply with local, national and international regulations
and norms as applicable to gas Detectors and approved electrical devices
installed in hazardous areas. The Detectors can be installed with general­purpose common tools and equipment.

The System should include the following (in addition to this manual):

 Detector unit - QR-X-11X (See Models and Types, page 8)
 Source unit - QT-X-X1X (See Models and Types, page 8)
 Two Tilt Mount Bases - P/N 888270

 1 base is used for the Detector

 1 base is used for the Flash Source
 Commissioning Kit - P/N 888247

26 Preparations for Installation

TM 888200 Rev (I), January 2014

The Commissioning kit includes Function Check Filter and the Telescope

Kit, which is used during each SafEye installation and then removed.

They can be reused for all other SafEye installations on the site.

Therefore, only one set is provided for several detectors.

 Telescope Kit - P/N 888210
 Function Check Filters - P/N 888260-1, -2
 Handheld Unit - P/N 799810
 Other accessories are available (per the customer request):

 Pole Mount (U-Bolt 5 inch) - P/N 799225

 HART Hand-Held Diagnostic Unit - P/N 888810

 HART Hand-Held Harness Kit - P/N 888815

 USB/RS485 Harness Converter Kit - P/N 794079-8

 Mini Laptop Kit - P/N 777820

 Sunshade - P/N 888263

See details in Appendix B.
The following procedure is used for preparing the installation of the 900 Gas

Detector:

1 Verify the appropriate Purchase Order. Record the Part No. and the

Serial No. of the detectors and source units and the installation date in
the appropriate log book.

2 Open the container package immediately prior to detector installation

and visually inspect the detectors; sources and accessories.

3 Verify that all components required for the detector installation are

readily available before commencing the installation. In the event that
the installation is not completed in a single session, secure and seal
detectors and conduits.

4 For wiring, use color-coded conductors or suitable wire markings or

labels. Cross section of wire must be between 1mm² to 2.5mm²
(18- 14AWG). The selection of wire gauge should be based on the
number of detectors used on the same loop and the distance from the
control unit. Max. Wire connection in the same terminal is two wire
cross section of each wire is 1mm².

Preparations for Installation 27

SafEyeTM Quasar 900 Gas Detector

Warning: Do not open the detector, even when isolated, when
flammable atmosphere is present.

5.4 Certification Instructions

Use the following certification instructions:
 The cable entry point may exceed 182°F (83°C) suitable precautions

should be taken when selecting the cable.
 The equipment may be used with flammable gases and vapors with

apparatus groups IIA and IIB +H2 T4 in the ambient temperature range

-67°F (-50°C) to +149°F (+65°C).

 Installation shall be carried out by suitably trained personnel in

accordance with the applicable code of practice e.g. EN 60079-14:1997.
 Inspection and maintenance of this equipment shall be carried out by

suitably trained personnel in accordance with the applicable code of

practice e.g. EN 60079-17.
 Repair of this equipment shall be carried out by suitably trained

personnel in accordance with the applicable code of practice e.g. EN

60079-19.
 The certification of this equipment relies upon the following materials

used in its construction:

 Enclosure: 316L Stainless Steel

 Window: Sapphire Glass

 Seals: EPDM
 If the equipment is likely to come into contact with aggressive

substances, then it is the responsibility of the user to take suitable

precautions that prevent it from being adversely affected, thus ensuring

that the type of protection provided by the equipment is not

compromised.

 Aggressive substances: For example, acidic liquids or gases

that may attack metals, or solvents that may affect polymeric
materials.

 Suitable precautions: For example, regular checks as part of

routine inspections or establishing from the material’s data
sheets that it is resistant to specific chemicals.

 Special Conditions for safe use: The Quasar 900 Open Path Gas

Detectors & Flash Source Units shall not be used as safety related

devices in accordance with directive 94/9/EC.

28 Certification Instructions

TM 888200 Rev (I), January 2014

Item

Qty

Type/Model

Tilt Mount

1

888269

Screw

1

M10 x 1.5

Spring Washer

1

No. 10

5.5 Conduit/Cable Installation

The conduit and cable installation must comply with the following guidelines:

1 To avoid water condensation in the detector, it should be installed with

the conduits/cable entries facing downwards.

2 Use flexible conduits/cables for the last portion connecting to the

detector.

3 When pulling the cables through the conduits, ensure that they are not

tangled or stressed. Extend the cables about 12 inches (30cm) beyond
the Detector location to accommodate wiring after installation.

4 After the conductor cables have been pulled through the conduits,

perform a continuity test.

5.6 Detector/Source Mounting

The Detector Source should be mounted with the Tilt Mount Kit, Model

888270. The Tilt enables the Detector to be rotated up to 45º in all
directions and fine alignment of up to 3º.

5.6.1 Tilt Kit P/N 888270

The following contents are included with the Tilt Mount Kit:

Table 10: Tilt Mount Kit

5.6.2 Detector/Source Installation

(Figure 4 and Figure 5)
The detector and the source can be installed in two ways with the same Tilt

Mount.

➣ To install the Detector/Source:

1 Place the Tilt Mount holding plate (item 1) in its designated location and

secure it with (4) fasteners through four (4) holes dia. 8.5mm.

Notes:

 Skip this step if the Tilt Mount is already installed.

 Detector removal for maintenance purpose does not require

Tilt Mount removal.

Conduit/Cable Installation 29

SafEyeTM Quasar 900 Gas Detector

2 Place the Detector, with its conduit/cable inlets pointing downwards on

the Detector holding plate of the Tilt Mount (item 2). Secure the
Detector with M10 x 1.5 screw with No. M10 spring washers (9,10).
Secure the detector to the Tilt Mount use Hex Key No. 7 for M10 x 1.5
screw (item 9).

3 Repeat steps 1 – 2 to install the Source.

5.7 Detector Wiring

➣ To install the Detector wiring:

1 Release the back cover secure bolt (item 15, Figure 5), and open the

detector back cover (item 14, Figure 5). The chamber is now revealed.

2 Remove the protective plug mounted on the Detector conduit/cable

entry inlet; pull the wires through the Detector inlet (item 4, Figure 6).
Use a 3/4” – 14NPT or M25x1.5 explosion-proof conduit connection /
cable gland to assemble the cable / explosion-proof conduit to the
Detector.

3 Connect the wires to the required terminals (item 2, Figure 6) according

to the wiring diagram. See paragraph 5.8 and figures 8, 10, 11, and 12
Appendix A.

4 Connect the grounding wire to the ground screw outside Detector

(item 3. Figure 6). The Detector must be well grounded to Earth
Ground.

5 Place and secure the Detector back cover by screwing the cover and

securing it using the secure bolt (item 15, Figure 5).

30 Detector Wiring

TM 888200 Rev (I), January 2014

1

Tilt Mount Holding Plate

5

Vertical Fine Alignment
Tightening Screw

2

Detector/Source Holding
Plate

6

Vertical Crude Alignment
Tightening Screw

3

Horizontal Crude Alignment
Tightening Screw

7

Vertical Find Alignment Screw

4

Horizontal Fine Alignment
Tightening Screw

8

Horizontal Fine Alignment
Screw

Figure 4: Tilt Mount

Detector Wiring 31

SafEyeTM Quasar 900 Gas Detector

1

Tilt Mount Holding Plate

9

Detector Tightening Screw

2

Detector/Source Holding
Plate

10

Detector Tightening Washer

3

Horizontal Crude Alignment
Tightening Screw

11

Detector

4

Horizontal Fine Alignment
Tightening Screw

12

Telescope

5

Vertical Fine Alignment
Tightening Screw

13

Telescope Tightening Bolt

6

Vertical Crude Alignment
Tightening Screw

14

Detector Back Cover

7

Vertical Fine Alignment
Screw

15

Detector Back Cover Secure
Bolt

8

Horizontal Fine Alignment
Screw

Figure 5: Detector and Tilt Mount Assembly

32 Detector Wiring

TM 888200 Rev (I), January 2014

1

Housing

5

Internal Earth Connection

2

Terminal Board

6

Connection to Handheld Unit

3

Earth Terminal

7

Detector Holding Plate

4

Inlet Conduit

Figure 6: Detector with Cover Removed

Detector Wiring 33

SafEyeTM Quasar 900 Gas Detector

Terminal

No.

Function

1

Power +24V DC

2

Return +24V DC

3

0-20mA (Input)

4

0-20mA (Output)

5

RS-485 (+)

6

RS-485 (-)

5.8 Detector Terminal Wiring

The Detector has six wiring terminals.
The following describes the function of each electrical terminal of the

detectors.

Table 11: Wiring Options

5.9 Flash Source Wiring

5.9.1 Wiring

➣ To install the wiring:

1 Release the back screw bolt (item 15, Figure 5), and open the source

back cover (item 14, fig. 4). The chamber is now revealed.

2 Remove the protective plug mounted on the source conduit/cable entry

inlet; pull the wires through the source inlet (item 4, Figure 7). Use a
3/4” – 14NPT or M25x1.5 explosion-proof conduit connection / cable
gland to assemble the cable / explosion-proof conduit to the Detector.

3 Connect the wires to the required terminals (item 2, Figure 7) according

to the wiring diagram. See paragraph Terminal Wiring, page 35 and
Figure 11 Appendix A.

4 Connect the grounding wire to the ground screw outside Detector

(item 3, Figure 7). The source must be well grounded to Earth Ground.

5 Place and secure the source back cover by screwing the cover and

secure the back screw bolt.

34 Detector Terminal Wiring

TM 888200 Rev (I), January 2014

Terminal

No.

Function

1

Power +24V DC

2

Return +24V DC

3

Spare

4

Spare

5

RS-485 (+)

6

RS-485 (-)

1

Housing

5

Internal Earth Connection

2

Terminal Board

6

N/A

3

Earth Terminal

7

Detector Holding Plate

4

Inlet Conduit

5.9.2 Terminal Wiring

The Flash Source contains six wiring terminals.

Table 12: Flash Source Wiring Options

Flash Source Wiring 35

Figure 7: Source with Cover Removed

SafEyeTM Quasar 900 Gas Detector

36 Flash Source Wiring

SafEye Operation

page 37

Alignment of Unit

page 37

Powering up the System

page 38

Safety Precautions

page 39

Signal Verification

page 39

Zero Calibration

page 40

Functional Check of Unit

page 41

6 Operating Instructions

➣ In this chapter…

6.1 SafEye Operation

Once the system is positioned, it will monitor for possible specified gases
automatically sending signals to a standard control panel or a PC. This
section describes the alignment, calibration and operation.

Important! Accurate Alignment is essential for proper operation of the
SafEye system.

6.2 Alignment of Unit

Using the Telescope performs full alignment.
Alignment procedure should be performed in two stages: Crude alignment

and fine adjustment.
The Telescope includes a Periscope that consists of a prism and an ocular

located vertical to the Telescope assembly. This allows the user to observe
into the opposite unit perpendicularly to the alignment when access from
the rear of the unit is impossible. For installations where rear access is
possible the Periscope is not necessary. In this case it can be removed by
releasing the Periscope Fastening Screw.

Important Notes:

1 Prior To Telescope Installation, verify that the Telescope and Its Sight

Mounting are free from any dirt to ensure proper alignment according to
factory calibration.

2 Do not attempt to change any factory calibration at the Telescope or its

mounting. This may prevent optimal alignment.

➣ To align the unit (see Figure 4):

SafEye Operation 37

1 Make sure that the Detector and the Flash Source are installed properly.

Installation instructions are described in section 5 of this document.

2 Remove the front shield using the two captive screws.

SafEyeTM Quasar 900 Gas Detector

3 Install the Telescope Assembly (12) on the detector/source front. Fasten

the Telescope with Fastening Screws (13).

4 Crude Alignment

a Use ¼” Allen screw driver for all alignment screws
b Loosen screws 5, 6
c Approximately aim the source horizontally toward the detector
d Tighten screw 6
e Loosen screws 3, 4
f Approximately aim the source vertically toward the detector
g Tighten screw 3

5 Repeat step 4 for the Detector
6 Fine Alignment

a Aim the Source to the Detector within horizontal axis using screws

7. Aim the cross to the detector or source center of the front
window (see figure 1 & 2 item 8).

b Tighten screw 5
c Aim within the vertical axis using screw 8
d Tighten screw 4
e Make sure the telescope cross is pointing to the detector and

source center of the window

7 Repeat step 6 for the Detector alignment
8 Remove the telescope. Install the front shield.

6.3 Powering up the System

Important! Prior to any operation or maintenance, follow the Safety
Precautions, page 39.

➣ To power up the system:

1 Make sure that the Source and Detector are connected to power.
2 Make sure that the 4-20mA meter is connected to the Detector.
3 Power up the system 18-32VDC.
4 After 60 seconds, the current meter will indicate 4mA.

Note: Zero calibration should be performed after powering up the system

(see Zero Calibration, page 40).

38 Powering up the System

TM 888200 Rev (I), January 2014

Channel

Installation Distance

Maintenance

Min

Med

Max

Reference

1V Gain1

1V Gain2

1V Gain4

The minimum signal
allowed is 2V at Gain9

Signal 1

1V Gain1

1V Gain2

1V Gain4

The minimum signal
allowed is 2V at Gain9

Ratio 0

0.6-1.4

0.6-1.4

0.6-1.4

0.5-3

NQRat 0

0.95 – 1.05

Must be 0.95 – 1.05

LEL

0 LEL x m

0 LEL x m

Temp.

Up to 25° C beyond room temp.

Up to 25° C beyond
room temp.

Voltage

32VDC > V > 18VDC

32VDC > V > 18VDC

6.4 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; refer to the drawings and

specifications issued by the manufacturer.

2 Do not open the detector/source housing while power is supplied.
3 Disconnect external devices, such as automatic extinguishing systems

before carrying out any maintenance task warranty.

6.5 Signal Verification

The signal verification can be done through Host software supplied by
Spectrex. Refer to Manual TM 888050 or by Handheld unit refer to Manual
TM 799060.

6.5.1 Signal Values Limitation

Table 13 describes the maintenance data channels limitation limits.

Table 13: Maintenance Channels Limit Values

Note: The installation information refers to the installation distance.

 Min: The minimum distance as defined on the model no.
 Med: Half of the maximum distance as defined on the model no.
 Max: The maximum distance defined on the model no.

Safety Precautions 39

SafEyeTM Quasar 900 Gas Detector

6.6 Zero Calibration

Zero calibration must be done after:

 Installation.
 Realignment.
 Window Cleaning.
 Any change in Detector or Source position.

Precise alignment must be performed prior to the zero calibration procedure.
Zero calibration should be performed in good weather conditions with
insignificant gas concentrations in the surrounding environment or indoors.

➣ To perform the zero calibration procedure:

1 Switch from Normal to Alignment mode indication.
2 Switch from Alignment to Standby mode.
3 Switch from Standby to Zero Calibration mode.

The 0-20mA output should now be at 1mA.

4 Wait up to 60 seconds until it switches to Normal mode. The Detector

reading is now set to normal. The 0-20mA output should now indicate
4mA.

Switching from each position (above first three instructions) can be done

by HOST HART (refer to TM888030) or RS485 (refer to TM888050 or

TM799060), or by moving the magnetic mode selector above the

magnetic switch (see Figure 8).

Figure 8: Magnetic Mode Selector

40 Zero Calibration

TM 888200 Rev (I), January 2014

6.7 Functional Check of Unit

The SafEye system has been calibrated at the factory for the User's specific
gas or vapor detection requirements. The following procedure validates the
functional operation of the system. The Functional Check Filter is a
convenient operational check used to confirm that response has not changed
from previous readings. The filter is not used for calibration, which is
unnecessary, nor does it equate to a particular quantity of gas.

Caution: Automatic activation or any external device that should not be
activated during the calibration check should be disconnected.

Notes:

1 This functional verification procedure is for a standard 0-20mA output.
2 Prior to starting the functional check, verify that the power to the units

is on and that the current of the 0-20mA channel is stable. Record the
reading.

➣ To perform the functional check:

1 Position the Functional Check filter in front of the SafEye Detector.
2 The functional check filter's window must be centered over the viewing

window of the Detector.

3 Wait 20 seconds.
4 Read the 0-20mA current. Determine the difference between the

reading taken with and without the Functional Check Filter. This
difference is the 0-20mA current variance.

5 Record the 0-20mA current variance in the Maintenance Logbook. If the

variance is more than a 30% change when compared to the previous
check (see delivery form), repeat the alignment.

Functional Check of Unit 41

SafEyeTM Quasar 900 Gas Detector

42 Functional Check of Unit

General Maintenance

page 43

Periodic Maintenance

page 43

7 Maintenance Instructions

➣ In this chapter…

7.1 General Maintenance

The SafEye Quasar 900 requires only simple periodic maintenance to
provide satisfactory service and achieve maximum performance. The
Detector and Source units can be maintained with the use of common tools
and equipment. Record the periodic test results in Maintenance Logbook
with a copy of the delivery form inside.

7.2 Periodic Maintenance

Recommended cleaning of optical surfaces to be performed periodically.
Note: The frequency of cleaning operations is ultimately dependent upon

the existing environmental conditions and the applications used.

➣ To perform periodic maintenance:

1 Proper maintenance will allow the SafEye system to retain maximum

performance and reliability.

2 The optical surfaces of the Source and Detector viewing windows should

be kept as clean as possible as it is an active device.

3 Alignment procedures must be performed each time that the Source or

the Detector unit has been opened or moved for any reason.

4 The Signal Verification Check corroborates the current signals from the

Flash Source compared to that of previous alignments. It is
recommended to perform this check every 6-12 months. The signal
should be checked according to threshold levels (see Signal Verification,
page 39).

5 The functional check should be performed every 6 months (see

Functional Check of Unit, page 41)

6 Alignment procedure should be performed only if the signals are below

Threshold value (see Signal Verification, page 39)

7 Zero calibration (see Zero Calibration, page 40) must be done every

time the Detector or Source is realigned or windows cleaned.

General Maintenance 43

SafEyeTM Quasar 900 Gas Detector

7.2.1 Routine Optical Surface Cleaning

The SafEye system, being an optical device, must be kept as clean as
possible. The optical surfaces concerned are the Source and Detector
viewing windows.

➣ To clean the optical window, proceed as follows:

1 Turn off the power to the SafEye detector and source.
2 In places where dust or dirt has accumulated on the optical surface,

clean the surface with a small, soft-bristle brush.

3 The surfaces must then be washed thoroughly with water and a mild

non-abrasive detergent.

4 Thoroughly rinse the glass surface with clean water; ensuring no residue

is left behind.

5 Dry the glass with a clean dry soft cloth.
6 Enter in the Maintenance Logbook: Date, name of person and company

who performed the maintenance service.

7 Turn on power to the SafEye detector and source.
8 Perform signal verification (see Signal Verification, page 39).
9 Perform zero calibration (see Zero Calibration, page 40).
10 Perform functional check (see Functional Check of Unit, page 41)

7.2.2 Signal Verification

The signal verification check determines the proper operation of the open
path. It checks the alignment and cleanliness of the window or any problem
in Source or Detector. Use the PC Host software to measure the signal
verification.

Refer to Manual TM 888050 or use I.S handheld unit. Refer to Manual
TM 799060 for non I.S Handheld Unit.

7.2.3 Function Check of Unit

The SafEye Quasar has been calibrated at the factory per the user’s specific
gas or vapor detection requirements. This procedure validates the functional
operation. The functional check must be done periodically. Refer to 6.7 for
instructions.

Caution: Automatic activation or any external device that should not be
activated during the calibration check should be disconnected.

44 Periodic Maintenance

Problem

Cause

Solution

“Maintenance call”

status or R and S are
below 2V DC at Gain
9

Poor alignment

Perform alignment

Dirt on the
window

Clean the window
Poor light source

Replace the light source

Detector fault

Replace/repair Detector

NQRat below the
permitted limit

Gas in the path

Make sure that the path is
clean and the weather
conditions are good

NQRat above the
permitted limit

Poor alignment

Perform alignment

Temperature higher
than 25° C beyond
the room
temperature

Electronic
problem

Replace/repair Detector

Ratio1 and Ratio2 out
of the limit

Poor alignment

Perform alignment

Dirt on the
window

Clean the window
Detector fault

Replace/repair Detector

Voltage less than 16V
DC. The Detector at
“V” fault

Low input
voltage

Check the power supply and
installation

8 Troubleshooting

Table 14: Troubleshooting

Periodic Maintenance 45

SafEyeTM Quasar 900 Gas Detector

46 Periodic Maintenance

Appendices

Appendices 47

SafEyeTM Quasar 900 Gas Detector

48 Appendices

RS-485 Communication Network

page 53

A Wiring Configurations

➣ In this appendix…

Figure 9: Detector Wiring Terminal

RS-485 Communication Network 49

SafEyeTM Quasar 900 Gas Detector

Figure 10: Source Wiring Terminal

50 RS-485 Communication Network

TM 888200 Rev (I), January 2014

Figure 11: 0-20mA Sink 4-Wire

Figure 12: 0-20mA Non-isolated Sink 3-Wire

RS-485 Communication Network 51

SafEyeTM Quasar 900 Gas Detector

Figure 13: 0-20mA Source 3-Wire

52 RS-485 Communication Network

TM 888200 Rev (I), January 2014

A.1 RS-485 Communication Network

By using the RS-485 network capability of the SafEye Quasar 900 detector
and additional software, it is possible to connect up to 32 Detectors in an
addressable system with four (4) wires only (2 for power and 2 for
communication). Using repeaters, the number of Detectors can be much
larger (32 Detectors for each repeater) up to 247 on the same four (4)
wires. When using the RS-485 network, it is possible to read each Detector
status (FAULT, WARNING, and ALARM).

For more details, consult the factory.

Figure 14: RS-485 Networking for Wiring Option 3

RS-485 Communication Network 53

SafEyeTM Quasar 900 Gas Detector

54 RS-485 Communication Network

Tilt Mount P/N 888270

page 55

Pole Mount (U-Bolt 5 inch) P/N 799225

page 55

Commissioning Kit P/N 888247

page 55

RS485 Hand-Held Diagnostic Unit P/N
799810

page 55

HART Hand-Held Diagnostic Unit P/N
888810

page 56
HART Hand-Held Harness Kit P/N 888815

page 56

USB/RS485 Harness Converter Kit P/N
794079-8

page 56
Mini Laptop Kit P/N 777820

page 56

Sunshade P/N 888263

page 56

B Accessories

➣ In this appendix…

B.1 Tilt Mount P/N 888270

The Tilt Mounting Brackets allow accurate alignment of the detector/source
for proper operation of the open path. The brackets give crude alignment of
±30° and fine alignment of ±5°.

B.2 Pole Mount (U-Bolt 5 inch) P/N 799225

The U-bolt mount is available to facilitate 5” pipe mounting.

B.3 Commissioning Kit P/N 888247

The Commissioning/Alignment Kit unit is required for commissioning and
future maintenance checks. Only one kit is required per site.

The kit includes an Alignment Telescope P/N 888210, a Magnetic Mode
Selector P/N 790285, two Function Check Filter P/N 888260-1, -2 for system
installation and periodical functional testing along with socket keys for
access to units.

B.4 RS485 Hand-Held Diagnostic Unit P/N 799810

RS485 Hand-Held diagnostic unit, fitted with harness and converter to the
quick plug connection which provides easy and economical connection, will
provide verification, status and instructions for correcting the detector’s
parameters.

RS485 Hand-Held Diagnostic Unit P/N 799810 55

SafEyeTM Quasar 900 Gas Detector

This is an I.S. approved Hand-Held with I.S. harness and converter to suit
the detector and programmed with a special host for maintenance and
commissioning.

B.5 HART Hand-Held Diagnostic Unit P/N 888810

HART Hand-Held diagnostic unit fitted with harness to the quick plug
connection which provides easy and economical connection. The HART
Hand-Held will provide verification, status and instructions for correcting the
detector’s parameters.

This is an I.S. approved Hand-Held with a special harness to suit the
detector and a host for maintenance and commissioning.

B.6 HART Hand-Held Harness Kit P/N 888815

A quick plug connection with harness which is connected on one side to a
standard HART Hand-Held unit and includes Spectrex host software that can
be uploaded to an existing Hand-Held (does not include the Hand-Held).

B.7 USB/RS485 Harness Converter Kit P/N

794079-8

The USB RS485 Harness Kit with RS485/USB converter, used with Spectrex
Host software, enables the user to connect to any available PC or laptop to
re-configure settings or perform diagnostics on the Quasar 900 gas
detector.

Refer to manual TM 888050 for programming instructions when using the
USB RS485 Harness Kit.

B.8 Mini Laptop Kit P/N 777820

The mini laptop, pre-loaded with Spectrex software, enables the user to re­configure settings or perform diagnostics on all flame and gas detectors
series.

Refer to manual TM777070 for programming instructions when using the
Mini Laptop Kit. The kit includes cable harness with RS485/USB converter.
The mini laptop is programmed with maintenance winhost for all detectors'
type.

B.9 Sunshade P/N 888263

The Sunshade is designed to protect the detector from the heat of the sun.

56 Sunshade P/N 888263

Safety Relevant Parameters for the Quasar
900 Open Path Gas Detector

page 57
General Conditions for Safe Use

page 58

DC = 94%

PFD

avg

= 6.45x 10

-4

PFD

%_SIL2

= 6,4 %

PFH = 1.15 x 10-7 1/h

PFH

%_SIL2

= 11,5 %



S

2056.1fit



D

1976.1fit



DU

114.8fit



SD

1933.4fit



DD

1861.4fit

SFF 97 %

C SIL-2 Features

➣ In this appendix…

This appendix details the special conditions to comply with the requirements
of EN 61508 for SIL-2.

The SafEye Quasar 900 IR Open-Path Gas Detector can be used in low and
high demand mode applications, see IEC 61508-4:2010, Chapter 3.5.16.

C.1 Safety Relevant Parameters for the Quasar

900 Open Path Gas Detector

Type: B
Structure: 1oo1
HFT: 0
Main time to repair: 72 h
Ambient temperature: max. 65°C
Proof-Test-Interval: 52 weeks

Safety Relevant Parameters for the Quasar 900 Open Path Gas Detector 57

SafEyeTM Quasar 900 Gas Detector

C.2 General Conditions for Safe Use

 The SafEye Quasar 900 IR Open-Path Gas Detector shall consist only of

the approved hardware and software modules.
 The application advice and the limitations of the manual must be taken

into consideration. For calibration and maintenance, the regional and

national regulations have to be taken into consideration.
 The 24V power supply must fulfill the requirements for PELV / SELV of

EN 60950.
 The HART and RS 485 interfaces are not allowed to be used for the

transmission of safety related data.
 The alert conditions according to SIL-2 can be implemented by an Alert

signal via the 20mA current loop.
 After installation and configuration the set-up parameters must be

verified and the function of the SafEye Quasar 900 IR Open-Path Gas

Detector must be checked completely.
 The alarm conditions of the transmitter must be checked periodically

together with the typical gas calibration checks. The SafEye Quasar 900

IR Open-Path Gas Detector must be switched OFF and ON.
 The connected controller must monitor the 4-20mA signal current for

values below 4mA and above 20mA.
 A defect on the SafEye Quasar 900 IR Open-Path Gas Detector must be

repaired within 72 hours.

58 General Conditions for Safe Use

Technical Support

For all technical assistance or support, contact:

218 Little Falls Road
Cedar Grove, NJ 07009, USA

Tel: [phone]
Fax: [phone]
Email: [e-mail]
Web-site: www.spectrex.net

Your Local Office:

SPECTREX INC.

USA (Texas)

Mr. Jay Cooley, Regional Sales Manager
16203 Park Row, Suite 150
Houston, Texas 77084
USA

Phone: [phone]
Email: [e-mail]

Europe

Mr. Ian Buchanan, Regional Manager
6 Applecross Road
Glasgow G66 3TJ
United Kingdom

Phone: [phone]
Email: [e-mail]

Far East

Mr. Deryk Walker, Regional Sales Manager
59 Fen Ji Hu, Danshui
Taipei County 25163

Taiwan (ROC)
Phone: [phone]
Mobile: [phone]
Email: [e-mail]

Technical Support 59

SafEyeTM Quasar 900 Gas Detector

60 Technical Support