Spectrex SafEye 300 Series User manual

300 Series
Open-Path Gas Detection System
User Guide
Document Ref: TM794200, Rev Ad March 2019
8200 Market Blvd, Chanhassen, MN 55317, USA
Phone: [phone] Fax: [phone]
Website: www.spectrex.net Email: [e-mail]

Legal Notice
The SPECTREX SafEye Open Path Gas Detector described in this document is the property of
Rosemount.
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 Rosemount.
While great efforts have been made to assure the accuracy and clarity of this document,
Rosemount 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.
Rosemount 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. Rosemount does not assume any liability arising out of the application or
any use of any product or circuit described herein; neither does it convey license under its
patent rights or the rights of others.
Warning: This manual should be read carefully by all
individuals who have or will have responsibility for using,
maintaining or servicing the product.
The detector is not field-repairable due to the meticulous
alignment and calibration of the sensors and the respective
circuits. Do not attempt to modify or repair the internal circuits
or change their settings, as this will impair the system’s
performance and void the SPECTREX product warranty.
Warranty
SPECTREX agrees to extend to Purchaser/Distributor a warranty on the SPECTREX supplied
components of the SharpEye products. SPECTREX warrants to Purchaser/Distributor that the
products are free from defects in materials and workmanship for a period of three (3) years,
commencing with the date of delivery to Purchaser/Distributor. SPECTREX expressly excludes
damage incurred in transit from the factory or other damage due to abuse, misuse, improper
installation, or lack of maintenance or “Act of God”which are above and beyond its control.
SPECTREX will, upon receipt of any defective product, transportation prepaid, repair or replace
it at its sole discretion if found to have been defective when shipped. Said repair or
replacement is SPECTREX’s sole liability under this warranty and SPECTREX’s liability shall be
limited to repair or replacement of the component found defective and shall not include any
liability for consequential or other damages. The customer is responsible for all freight charges
and taxes due on shipments both ways. This warranty is exclusive of all other warranties
express or implied.

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SafEyeTM Open Path Detection System User Guide
Release History
Rev
Date
Revision History
Prepared by
Approved by
Aa
August 2018
First Release
Michal Heller
Udi Tzuri
Ab
December 2018
Second Release
Michal Heller
Udi Tzuri
Ac
February 2019
Third Release
Michal Heller
Udi Tzuri
Ad
March 2019
Fourth Release
Michal Heller
Udi Tzuri

TM794200 Rev Ad, March 2019
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Table of Contents
Legal Notice ................................................................................................ iii
Warranty .................................................................................................... iii
Release History............................................................................................ iv
1Scope................................................................................................... 11
1.1 Product Overview .................................................................................11
1.2 Document Overview .............................................................................12
2Technical Description .......................................................................... 13
2.1 Features .............................................................................................13
2.2 Applications.........................................................................................13
2.3 Principle of Operation ........................................................................... 14
2.3.1 Definitions of Terms.......................................................................14
2.3.2 Spectral Finger Print ......................................................................14
2.3.3 Optical Path ..................................................................................14
2.3.4 Microprocessor Based.....................................................................15
2.3.5 Gas Sensitivity ..............................................................................15
2.3.6 Gas and Mixture Selection and Setting .............................................16
2.3.7 HART Protocol ...............................................................................16
2.3.8 Modbus RS-485............................................................................. 17
2.4 Product Marking ...................................................................................17
2.5 Models and Types.................................................................................17
2.6 Description..........................................................................................18
2.6.1 Light Source Unit...........................................................................19
2.6.2 Detector Unit ................................................................................20
3Operation Mode ................................................................................... 21
3.1 Normal Mode ....................................................................................... 21
3.2 Fault Mode ..........................................................................................21
3.3 Alignment Mode ................................................................................... 21
3.4 Zero Calibration Mode (1mA Output) ......................................................22
3.5 Mode Selection ....................................................................................22
3.6 Visual Indicator LEDs ............................................................................22
3.7 Output Signals..................................................................................... 24
3.7.1 4–20mA Current Output .................................................................24
3.7.2 Relays..........................................................................................25

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SafEyeTM Open Path Detection System User Guide
3.7.3 RS-485 Interface ...........................................................................25
3.8 Terminals............................................................................................26
3.8.1 Detector Terminal..........................................................................26
3.8.2 Light Source Terminals...................................................................28
3.9 System Setup ...................................................................................... 29
3.9.1 Detection Function Programming .....................................................29
3.9.2 Detection Setup Function................................................................ 29
3.9.3 Detector Default Setup................................................................... 31
4Technical Specifications ...................................................................... 33
4.1 General Specifications...........................................................................33
4.2 Electrical Specifications .........................................................................34
4.2.1 4–20mA Current Output .................................................................34
4.2.2 Communications Network ...............................................................34
4.2.3 Relay Output: ...............................................................................35
4.2.4 HART Protocol ...............................................................................35
4.3 Mechanical Specifications ......................................................................36
4.4 Environmental Specifications .................................................................37
5Installation Instructions...................................................................... 39
5.1 Introduction ........................................................................................39
5.2 General Considerations .........................................................................39
5.2.1 Personnel .....................................................................................39
5.2.2 Tools Required ..............................................................................39
5.2.3 Site Requirements .........................................................................39
5.2.4 The Source and Detector ................................................................40
5.2.5 Guidance Tips for Gas Detector Locations .........................................40
5.3 Preparations for Installation...................................................................40
5.4 Mounting for Duct Installation................................................................41
5.4.1 Duct Mount Set ............................................................................. 41
5.4.2 Duct Alignment Set and Accessories ................................................41
5.4.3 Duct Installation: Surface Preparation ..............................................42
5.4.4 Duct Mount Installation .................................................................. 44
5.4.5 Duct Mount Alignment....................................................................47
5.4.6 Conduit/Cable Installation...............................................................49
5.4.7 Harness Connection .......................................................................49
5.4.8 Detector Terminal Wiring................................................................52
5.5 Light Source Wiring .............................................................................. 53

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5.5.1 Power Supply................................................................................53
5.5.2 Harness Connection .......................................................................53
5.5.3 Terminal Wiring.............................................................................53
6Operating Instructions ........................................................................ 55
6.1 SafEye Operation ................................................................................. 55
6.2 Powering on the System .......................................................................55
6.3 Safety Precautions ............................................................................... 55
6.4 Zero Calibration ...................................................................................56
6.5 Functional Check of Unit........................................................................56
7Maintenance Instructions .................................................................... 59
7.1 General Maintenance ............................................................................59
7.2 Periodic Maintenance ............................................................................59
7.2.1 Routine Optical Surface Cleaning .....................................................60
7.2.2 Signal Verification..........................................................................60
7.2.3 Function Check of Unit ...................................................................62
7.2.4 Maintenance Records .....................................................................62
8Troubleshooting .................................................................................. 63
Appendix A: Wire Selection Tables ......................................................... 65
A.1 General Instructions for Electrical Wiring................................................. 65
Appendix B: Wiring Option Configurations.............................................. 67
A.2 RS-485 Communications Network ..........................................................69
Appendix C: Outline Drawings ................................................................ 71
Appendix D: Special Conditions to Comply with SIL-2 Requirements ...... 73
A.3 Safety Relevant Parameters...................................................................73
A.4 Guidelines for Configuration, Installation, Operation, and Maintenance .......73
A.4.1 Conditions for Safe Operation.......................................................... 73
A.4.2 Alarm Operation Using the 4–20mA Signal Current ............................ 74
A.4.3 Alarm Operation Using Relay Outputs...............................................74
A.5 Miscellaneous ......................................................................................74
Technical Support .........................................................................................0

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SafEyeTM Open Path Detection System User Guide
List of Figures
Figure 1: P/N Definition for the 300 Series .....................................................18
Figure 2: Light Source –Reflector Type ......................................................... 19
Figure 3: Detector.......................................................................................20
Figure 4: Detector Wiring Diagram................................................................26
Figure 5: Detector Terminal Board ................................................................27
Figure 6: Light Source Terminal Board...........................................................28
Figure 7: Drilling Layout Dimensions for Duct Installation ................................43
Figure 8: Detector/Light Source and Duct Mount Installation Scheme ................45
Figure 9: Duct Mount Installation - Outline Drawing ........................................46
Figure 10: Telescope Alignment Set ..............................................................48
Figure 11: Detector with Cover (removed) .....................................................51
Figure 12: Light Source - Open View .............................................................54
Figure 13: Detector Wiring Diagram ..............................................................67
Figure 14: 4–20mA Source Output ................................................................68
Figure 15: Typical 4 Wire Controller ..............................................................68
Figure 16: RS-485 Networking......................................................................69

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List of Tables
Table 1: SafEye 300 IR type Model Information ..............................................17
Table 2: LED Status Indication......................................................................23
Table 3: Alignment Indication LED Color ........................................................24
Table 4: Standard (Default) 4–20mA Current for the Gas Channel ....................25
Table 5: Discrete Reading of 4–20mA at Different Detector Modes ....................25
Table 6: Light Source Terminals.................................................................... 28
Table 8: Sensitivity Levels Options 301 SIL ....................................................30
Table 9: Detection Distance Range................................................................33
Table 10: Sensitivity Range.......................................................................... 33
Table 11: Dry Contact Relays .......................................................................35
Table 12: Detector/Source Weight and Dimensions .........................................37
Table 14: Duct Mount Kit .............................................................................41
Table 15: LED Signal Adjustment .................................................................. 61
Table 16: Maximum DC Resistance at 68°F for Copper Wire .............................65
Table 17: Wiring Length in Feet/Meters .........................................................66

Product Overview
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1Scope
1.1 Product Overview
The SafEye 300 Series is an IR open-path gas detector that detects
ambient combustible gases at LEL*m concentrations over a path length
from 2ft/0.6m up to 11.5ft/3.55m, even in harsh environments where
dust, fog, rain, snow, or vibration can cause a high reduction of signal.
The shorter path lengths are usually associated with applications in
ducts/air intakes to provide a fast response to ingress of flammable gases.
Due to its unique combination of triple optics and dual-spectrum reference
sensor, the SafEye can maintain operation in up to 90% signal obscuration
and ±2 degree of misalignment.
SafEye has a fast response detection time of no more than 2 seconds. This
feature enables an adequate time to take appropriate safety measures.
This manual consists of a full description of the detector and its features.
It contains instructions on the installation, operation and maintenance of
the product. The system is intended to be operated by qualified personnel
only.
•To use the host software to change the required functions and for
maintenance, refer to Manual TM899050 for instructions.
•To use HART protocol to change the required functions and for
maintenance, refer to Manual TM899030.

Document Overview
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SafEyeTM Open Path Detection System User Guide
1.2 Document Overview
This manual describes the detector and its features and provides
instructions on the installation, operation, and maintenance of the
detector.
This manual is divided into separate chapters as follows:
Chapter 1
Scope - a general introduction and overview of the product and the
manual, with a brief description of its content.
Chapter 2
Technical Description - the detector’s theory of operation.
Chapter 3
Operation Mode - the detector’s operation modes, user interface, and
indications.
Chapter 4
Technical Specifications - the detector’s electrical, mechanical, and
environmental specifications.
Chapter 5
Installation Instructions, including wiring and mode setting.
Chapter 6
Operating Instructions and power-up procedures.
Chapter 7
Maintenance Instructions and support procedures.
Chapter 8
Troubleshooting
Appendix A
Wire Selection Tables for electrical wire selection according to
installation configuration.
Appendix B
Wiring Option Configurations - wiring diagrams for installation.
Appendix C
Outline Drawings
Appendix D
Special Conditions to Comply with SIL-2 Requirements

Applications
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2Technical Description
2.1 Features
•Operating distance from 2ft/0.6m up to 11.5ft/3.5m
•Simultaneous detection of C1–C8flammable gases
•High sensitivity and fast response to hydrocarbon gases
•Continuous operation in extreme and harsh environmental conditions
•Withstands extreme vibration conditions
•Interfaces with most commonly used control panels
•Standard 4–20mA and dry contact relay outputs
•RS-485 output for PC communications network for a maximum of 64
systems
•Simple 1-person installation, alignment, and calibration
•Designed to meet SIL-2 approval by TÜV
•Programmable configuration
2.2 Applications
The SafEye system may be used to monitor flammable gas concentration
in various applications, such as fence-line monitoring and area monitoring
in processing facilities, air-intakes, and duct installations found in various
industries, including:
•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
•Hazardous enclosures and test cells

Principle of Operation
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SafEyeTM Open Path Detection System User Guide
•LNG-LPG systems
•Offshore Floating Production Storage and Shipping vessels (FPSO) and
fixed oil rigs
2.3 Principle of Operation
The SafEye 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:
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, or path length, in meters (m).
2.3.2 Spectral Finger Print
Each hazardous material is detected at a specific wavelength selected
according to its specific spectral absorption or “fingerprint.” There are 3 IR
sensors: 2 signals and 1 reference. The detection process involves 2
separate filters: 1 transmitting radiation that is absorbed by a particular
gas and 1 that is not sensitive to it.
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.

Principle of Operation
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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 IR Model uses wavelengths around the 3.4µ spectral band to
measure air flammability potential between the source and detector. At
this wavelength, all hydrocarbon materials have a strong absorption peak.
This peak enables the detector to achieve regular sensitivity LEL*m* 2.5
LEL*m or 1 LEL*mLEL*mLEL*mLEL*mLEL* could be selected using RS485
Winhost, or HART communication
However, since the desired detection information is air flammability and
the actual measurement is radiation absorption around the 3.4µ spectral
band, the detector has a different sensitivity to different gases or gas
combinations.
This difference in sensitivity is irrelevant if in the protected area the gas
composition is known. However, if in a protected area the gas composition
can vary substantially, then the difference in sensitivity should be
considered in determining the detector calibration.

Principle of Operation
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SafEyeTM Open Path Detection System User Guide
2.3.6 Gas and Mixture Selection and Setting
At the 3.4µ spectral band of the SafEye, the least sensitive gas is pure
(100% vol) methane and the most sensitive gases are various mixtures of
methane with heavier alkanes where the methane percentage is less than
90%. For pure ethane the sensitivity is close to the high sensitivity gases
and for pure propane it lies somewhere between the 2 extremes. Every
SafEye has 4 built-in gas calibration settings that can be changed by
function setup. The setting for each Safeye is detailed on the calibration
datasheet provided with each unit.
The calibration settings are designed for use in various applications:
Gas 1
Pure methane and is for use in methane storage and piping
applications
Gas 2
92% methane, 4% propane, and 4% ethane (default). Universal oil
and gas production mixture to be used in all cases where methane
concentration in the mixture does not exceed 98%. It can also be
used for pure ethane applications.
Gas 3
LPG –60% propane and 40% butane.
Gas 4
99% methane and 1% propane and is for use in detecting methane
mixture with heavier gases where the methane component can vary
between 100% and 95%. It is also good for protecting areas where
a leak can be either pure methane or pure propane.
The 4 internal gas calibrations cover most of the flammable gas detection
applications. Actual selections should be made by the user in consultation
with experts to provide for safety requirements. However, for special
cases where none of the 4 calibrations are appropriate, SPECTREX,
through local agents, can advise on how to calibrate a SafEye detector to
any specific gas.
2.3.7 HART Protocol
The SafEye 300 uses the HART Protocol.
HART communications is a bi-directional industrial field communications
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 HART-
enabled.
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 TM899030.

Models and Types
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2.3.8 Modbus RS-485
A PC can be used for onsite function programming and setup changes to
the detector using RS-485 Modbus-compatible 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 of local and remote diagnostic tools.
During installation, the personal computer with the preinstalled winhost
software, which could be downloaded from the product web page 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.
For more details, refer to Manual TM899050.
2.4 Product Marking
The SafEye 300 Series open path gas detector and source unit are
designed to meet:
FM per Class I, Div. I, Groups B, C, and D
Class II, Div. I, Groups E, F, and G
Type 6P, IP66/IP67
2.5 Models and Types
This manual includes information for SafEye 300 Series models. Table 1:
SafEye 300 IR type Model Information identifies the detector model
options.
Table 1: SafEye 300 IR type Model Information
Model
Distance
Detector*
Light Source*
Ft
m
301
2–11.5
0.6–3.5
OP-IL000DFAL
OPS-LI0DFAL

Description
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SafEyeTM Open Path Detection System User Guide
Figure 1: P/N Definition for the 300 Series
2.6 Description
The system comprises 2 main units: the light source and the detector. The
SafEye system detects gases over an open path transmitted from the light
source to the detector.

Description
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2.6.1 Light Source Unit
The light source unit emits IR radiation pulses in a collimated beam (for
maximum intensity) to the detector unit. The model number is OPS-
LI0DFAL (Figure 2).
Figure 2: Light Source –Reflector Type

Description
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SafEyeTM Open Path Detection System User Guide
2.6.2 Detector Unit
The detector’s sensors receive the transmitted pulsed radiation signals
from the light source (see Figure 3). 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 signals can be sent to a standard control
panel or to a central computer.
The Series 300 detector, model no. OP-IL000DFAL is available for short-
range, duct mounted installation.
Figure 3: Detector