Spectrex SafEye 300 Series User manual

300 Series
Open-Path Gas Detection System
User Guide
Document Ref: TM794200, Rev Ae July 2021
6021 Innovation Blvd, Shakopee, MN 55379, USA
Phone: [phone]
Website: www.spectrex.net Email: spectrex.csc.rmt[email protected]

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
Ae
July 2021
Fifth Release
Michal Heller
Udi Tzuri

TM794200 Rev Ae, July 2021
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Table of Contents
Legal Notice...............................................................................................iii
Warranty ...................................................................................................iii
Release History ..........................................................................................iv
1Scope................................................................................................... 11
1.1 Product Overview ................................................................................11
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 Certification ............................................................................18
2.4.1 FM..............................................................................................18
2.4.2 SIL-2 ..........................................................................................18
2.5 300 Series Model ................................................................................18
2.6 Description.........................................................................................20
2.6.1 Light Source Unit..........................................................................20
2.6.2 Detector Unit ...............................................................................21
3Operation Mode ................................................................................... 23
3.1 Normal Mode ......................................................................................23
3.2 Fault Mode .........................................................................................23
3.3 Alignment Mode ..................................................................................23
3.4 Setting the Baseline (Zero Calibration Mode) - 1mA Output.......................24
3.5 Mode Selection ...................................................................................24
3.6 Visual Indicator LEDs ...........................................................................24
3.7 Output Signals....................................................................................26
3.7.1 4–20mA Current Output ................................................................26

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SafEyeTM Open Path Detection System User Guide
3.7.2 Relays.........................................................................................26
3.7.3 RS-485 Interface ..........................................................................26
3.8 Terminals...........................................................................................27
3.8.1 Detector Terminal.........................................................................27
3.8.2 Light Source Terminals ..................................................................29
3.9 System Setup.....................................................................................30
3.9.2 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 Communication ............................................................................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 General Considerations ........................................................................39
5.1.1 Required Tools .............................................................................39
5.1.2 Site Requirements ........................................................................39
5.1.3 The Source and Detector ...............................................................39
5.1.4 Guidance Tips for Gas Detector Locations.........................................39
5.2 Needed for Installation.........................................................................39
5.2.1 Duct Installation: Surface Preparation .............................................40
5.2.2 Duct Mount Installation .................................................................42
5.2.3 Duct Mount Alignment...................................................................46
5.2.4 Conduit/Cable Installation..............................................................49
5.2.5 Harness Connection ......................................................................49
5.2.6 Detector Terminal Wiring ...............................................................52
5.3 Light Source Wiring .............................................................................53
5.3.1 Power Supply...............................................................................53
5.3.2 Harness Connection ......................................................................53
5.3.3 Terminal Wiring............................................................................53
6Operating Instructions ........................................................................ 55
6.1 SafEye Operation ................................................................................55

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6.2 Powering on the System.......................................................................55
6.3 Safety Precautions ..............................................................................55
6.4 Signal Verification ...............................................................................56
6.5 Setting the Baseline (Zero Calibration) ...................................................56
6.6 Validating the Installation.....................................................................56
7Maintenance Instructions .................................................................... 59
7.1 General Maintenance ...........................................................................59
7.2 Periodic Maintenance ...........................................................................59
7.2.1 Routine Optical Surface Cleaning ....................................................61
7.2.2 Signal Verification.........................................................................62
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...... 75
A.3 Safety Relevant Parameters..................................................................75
A.4Guidelines for Configuration, Installation, Operation, and Maintenance........75
A.4.1 Conditions for Safe Operation.........................................................75
A.4.2 Alarm Operation Using the 4–20mA Signal Current............................76
A.4.3 Alarm Operation Using Relay Outputs ..............................................76
A.5 Miscellaneous .....................................................................................76
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.................................... 19
Figure 2: Light Source –Reflector Type........................................ 20
Figure 3: Detector..................................................................... 21
Figure 4: Detector Wiring Diagram .............................................. 27
Figure 5: Detector Terminal Board............................................... 28
Figure 6: Light Source Terminal Board ......................................... 29
Figure 7: Drilling Layout Dimensions for Duct Installation ............... 41
Figure 8: Duct Mount................................................................. 42
Figure 9: Duct Mount –rear view ................................................ 43
Figure 10: Inserting detector plate screws .................................... 44
Figure 11: Attaching the duct mount plate.................................... 44
Figure 12: Tightening the detector plate screws ............................ 45
Figure 13: Alignment tool........................................................... 46
Figure 14: Connecting the alignment tool ..................................... 47
Figure 15: Affixing the alignment tool .......................................... 47
Figure 16: Adjusting the detector plate ........................................ 48
Figure 17: Aligning the alignment tool.......................................... 48
Figure 18: Detector with Cover (removed).................................... 51
Figure 19: Light Source - Open View............................................ 54
Figure 20: Detector Wiring Diagram ............................................ 67
Figure 21: 4–20mA Source Output .............................................. 68
Figure 22: Typical 4 Wire Controller............................................. 68
Figure 23: RS-485 Networking .................................................... 69

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List of Tables
Table 1: SafEye 300 IR type Model Information............................. 18
Table 2: Status Indication .......................................................... 25
Table 3: Standard 4–20mA Current for the Gas Channel................. 26
Table 4: Light Source Terminals .................................................. 29
Table 5: Sensitivity Levels Options 301 SIL................................... 31
Table 6: Detection Distance Range .............................................. 33
Table 7: Sensitivity Range.......................................................... 33
Table 8: Dry Contact Relays ....................................................... 35
Table 9: Detector/Source Weight and Dimensions.......................... 36
Table 10: Signal verification limitation values................................ 56
Table 11: Maximum DC Resistance at 68°F for Copper Wire ............ 65
Table 12: 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/3.5m, even in harsh environments.
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 contains instructions on the installation, operation and
maintenance of the product.
•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.

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 hydrocarbon gases
•High sensitivity and fast detection response
•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
•HART communication protocol
•Simple 1-person installation
•SIL-2 approval by TÜV
•Programmable configuration
2.2 Applications
The SafEye system may be used to monitor flammable gas concentration
in air-intakes and duct installations found in various industries, such as:
•Petrochemical, chemical, and pharmaceutical production areas
•Refineries, oil platforms, pipelines, refueling stations, and fuel storage
facilities
•Engine rooms
•Compressor and pumping stations
•Hazardous enclosures and test cells
•LNG-LPG systems
•Offshore Floating Production Storage and Shipping vessels (FPSO) and
fixed oil rigs

Principle of Operation
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SafEyeTM Open Path Detection System User Guide
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.

Principle of
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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 300 series uses wavelengths around the 3.4µ spectral band to
measure air flammability potential between the source and detector. At
this wavelength, hydrocarbon-based gases have a strong absorption peak.
The measuring scale in which gas concentration is detected can be
selected using RS485 Winhost, or HART communication. The two
measuring scale options are:
•1 LEL.m
•2.5 LEL.m.

Principle of Operation
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SafEyeTM Open Path Detection System User Guide
2.3.6 Gas and Mixture Selection and Setting
Every SafEye has 4 built-in gas calibration settings that can be changed
by function setup.
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.

Principle of
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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. 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.

300 Series Model
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SafEyeTM Open Path Detection System User Guide
2.4 Product Certification
The SafEye 300 Series is approved by the following certifications:
2.4.1 FM
The SafEye 300 series is approved per FM certification:
Class I, Div. I, Groups B, C, and D
Class II, Div. I, Groups E, F, and G
Type 6P, IP66/IP67
2.4.2 SIL-2
The SafEye 300 is TUV approved for SIL-2 requirements per IEC 61508.
According to SIL-2 requirements, the alert condition can be implemented
by an alert signal via the 0–20mA current loop.
2.5 300 Series Model
The SafEye 300 is available in the following model.
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

300 Series Mo
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Figure 1: P/N Definition for the 300 Series

Description
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SafEyeTM Open Path Detection System User Guide
2.6 Description
The system comprises 2 main units: the light source and the detector. The
SafEye 300 Series detects gases over an open path transmitted from the
light source to the detector.
2.6.1 Light Source Unit
The light source unit emits IR radiation pulses in a collimated beam to the
detector unit.
Figure 2: Light Source –Reflector Type