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Senscient ELDS 1000 Series Instruction Manual

Elds 1000 series; elds 2000 series gas detectors
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Version 1.06 Iss 4
ECR111
INSTRUCTION MANUAL
Baseefa ATEX - Europe
01-01-1865-D
Senscient ELDS™ 1000 / 2000 Series
Open Path Gas Detector
including Cross Duct
Installations
Read and understand this Instruction Manual before installing,
operating or servicing ELDS 1000 / 2000 Series OPGD systems

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Summary of Contents for Senscient ELDS 1000 Series

  • Page 1 Version 1.06 Iss 4 ECR111 INSTRUCTION MANUAL Baseefa ATEX - Europe 01-01-1865-D Senscient ELDS™ 1000 / 2000 Series Open Path Gas Detector including Cross Duct Installations Read and understand this Instruction Manual before installing, operating or servicing ELDS 1000 / 2000 Series OPGD systems...
  • Page 2 If units require repair or service they must be safely removed from any hazardous location / area in which they are installed, and returned to Senscient. Other than the rear cover providing access to the terminals for connection purposes the units are not intended to be opened in service.
  • Page 3 It is the users responsibility to take adequate precautions during transportation and use if taken into hazardous areas. IMPORTANT NOTICES Senscient Inc. can take no responsibility for installation and/or use of its equipment if this is not done in accordance with the appropriate issue and/or amendment of the manual.
  • Page 4 Senscient ELDS™ SAFETY If further details are required that do not appear in this manual, contact Senscient or one of their agents. Senscient Ltd. will supply this manual in other languages of the European Union (countries covered by the ATEX directive) upon request.

  • Page 5: Table Of Contents

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ CONTENTS INTRODUCTION ......................7     SYSTEM DESCRIPTION ....................10     Introduction ......................10       Transmitter ......................11     Receiver ......................12     Adjustable Mounting Bracket ................13  ...
  • Page 6 Version 1.06 Iss 4 ECR111 Senscient ELDS™ CONTENTS 4.2.2 Final Alignment Using Telescope ..............48     4.2.2.1   Attaching the Alignment Telescope ............. 48   4.2.2.2 Final Alignment Procedure ..............54     4.2.2.3   Making Alignment Adjustments ............57  ...
  • Page 7 Version 1.06 Iss 4 ECR111 Senscient ELDS™ CONTENTS APPENDIX C - ACCESSORIES & SPARE PARTS .............123     11.1   System Units .....................123   11.2 General ......................123       MANUFACTURER’S EC DECLARATION ..............125   MANUFACTURER’S CONTACT DETAILS ..............126  ...

  • Page 8: Introduction

    Senscient ELDS™ INTRODUCTION 1 INTRODUCTION The Senscient ELDS™ 1000 / 2000 Series is a range of open path, flammable and / or toxic gas detectors that is currently available in two versions*.  Senscient ELDS™ Series 1000 CH - Methane Detector ...
  • Page 9 Local communication between an operator/technician and the gas detector system is made via SITE (Senscient Installation & Test Environment) running on a laptop or an iRoc PDA, using a communication link to either the transmitter or receiver. SITE provides the user with a menu-style interface to select and invoke commands for commissioning and configuring the system, and for viewing the system state and measurements.
  • Page 10 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INTRODUCTION This manual consists of the following parts:  Chapter 1 INTRODUCTION  Chapter 2 SYSTEM DESCRIPTION  Chapter 3 INSTALLATION DESIGN & ENGINEERING  Chapter 4 INSTALLATION & COMMISSIONING  Chapter 5 FUNCTIONAL TESTING ...

  • Page 11: System Description

    0.5 - 3.5m Refer to Senscient for additional ranges and gases. When designing an installation for Senscient ELDS™ 1000 / 2000 Series it is important that the correct range of the gas detector for each path to be monitored is selected and specified.

  • Page 12: Transmitter

    The Transmitter and Receiver are each mounted upon robust, adjustable mounting brackets. The design of the mounting and alignment arrangement for the Senscient ELDS™ 1000 / 2000 Series is highly accommodating, making it simpler to realise a good installation in a variety of locations and environments.

  • Page 13: Receiver

    300mm 220mm The solid state, InGaAs photodiode detectors used in the Senscient ELDS™ 1000 / 2000 Series provide an exceptional dynamic range and superb temperature and long term stability. These properties contribute significantly to the solar immunity and stability of the Senscient ELDS™...

  • Page 14: Adjustable Mounting Bracket

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ SYSTEM DESCRIPTION Between four and eight connections to the Receiver are required, depending upon the number and configuration of the 4-20mA outputs used. These connections are required to provide +24V, 0V, 4-20mA(1), 4-20mA(2) and GND (for electrical safety).

  • Page 15: Sunshade

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ SYSTEM DESCRIPTION Sunshade The sunshade is a standard-fit item provided to ensure that units stay as cool as possible, wherever they are installed and operated, thereby maximizing the service life of the electronics inside. The sunshade is adjustable in order to facilitate use of the alignment telescope and provide easier access to the electrical connections inside the terminal compartment.

  • Page 16: Cross Duct Mounting Plate

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ SYSTEM DESCRIPTION Cross Duct Mounting Plate Cross Duct ELDS systems are designed to be mounted on opposite sides of flat, parallel- walled ducts using the Mounting Plate provided for this purpose and shown below.

  • Page 17: Installation Design & Engineering

    (trained by Senscient or a Senscient authorised trainer). This training will provide the installer with a clear understanding of the Senscient ELDS™ OPGD product and the associated accessories and tools. It will also provide familiarity with the installation, alignment and commissioning procedures, plus installation assessment skills to identify potential problem areas.

  • Page 18: Location For Best Coverage

    Codes of Practice. It is recommended that the installation designer consults these Codes of Practice. Senscient would advise that the best current methodology for siting all types of fixed gas detectors is based upon the expert use of gas dispersion modelling, performed for the particular area(s) of plant or facility where potential gas leak hazards exist.
  • Page 19 Deluge and Flooding - Senscient ELDS™ OPGDs are rated IP66/67 and as such will not be damaged by occasional deluge or flooding. However, during such instances the unit will completely lose its IR signal and will enter the BEAM-BLOCK/FAULT state.

  • Page 20: Beam Path

    Intense Electromagnetic Fields - Senscient ELDS™ OPGDs comply with FM6325 and are designed to comply with EN50270, and as such are well protected from interference by electromagnetic fields. However, locations in close proximity to radio/radar transmitters, heavy electrical plant and high voltage power cables may experience field strengths in excess of those specified in EN50270.
  • Page 21 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION DESIGN & ENGINEERING Beam clearance arc - radius more than 10cm Telescope clearance arc radius - more than 30cm Notes: In order to fit the alignment telescope, used during the alignment process, a clear accessible arc of at least 30cm radius is required close to the unit as shown.

  • Page 22: Supporting Structure

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION DESIGN & ENGINEERING 3.2.4 Supporting Structure The Transmitter and Receiver units should be fixed to a stable supporting structure using the mounting brackets supplied. Note: The maximum movement of the supporting structure under all anticipated ...

  • Page 23: Wall Mounting

    3.2.6 Orientation Senscient ELDS™ OPGDs are solar immune and therefore there is no need to take account of the sun’s movement when considering orientation. When positioning the units do not install them with the optical axis at an angle greater than...

  • Page 24: Siting And Mounting Cross Duct Elds Systems

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION DESIGN & ENGINEERING 3.2.7 Siting and Mounting Cross Duct ELDS Systems Cross Duct ELDS systems are specifically designed and engineered for installation with their beam-path running across the duct, perpendicular to the direction of flow through the duct.

  • Page 25: Electrical Connections

    ELECTRICAL CONNECTIONS 3.3.1 Electrical Installation Design & Engineering Recommendations All ranges of the Senscient ELDS™ 1000 / 2000 Series comply with the electrical and EMC requirements of EN50270. In order to maintain compliance with the applicable standards it is essential that the electrical installation of ELDS™ 1000 / 2000 Series systems is engineered accordingly.
  • Page 26 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION DESIGN & ENGINEERING h. When a single wire is used as the primary 4-20mA signal carrying conductor, the current loop is completed by either the 0V or the +24V conductor running to the unit.
  • Page 27 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION DESIGN & ENGINEERING units is when they are drawing their maximum specified power. Refer to section 3.3.5 for information to assist with the selection of suitable cable. r. The power consumption of each half of an ELDS 1000 / 2000 Series system is around 10W, which is sufficient to create a significant voltage drop due to the current flowing through the resistance of the field cabling.

  • Page 28: Electrical Connections: Terminal Compartment

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION DESIGN & ENGINEERING installation. The location and arrangement of this connection should be carefully engineered to minimise the introduction of noise onto the instrument earth. w. The terminal compartment of each ELDS 1000 / 2000 Series unit incorporates a single cable entry on the underside of the unit.

  • Page 29: Receiver Electrical Connections

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION DESIGN & ENGINEERING 3.3.3 Receiver Electrical Connections The terminal compartment of the Receiver of an ELDS 1000 / 2000 Series OPGD contains a 12-way terminal block, by means of which most electrical connections to the unit can be made.
  • Page 30 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION DESIGN & ENGINEERING Wiring Diagram for ELDS 1000 Receiver with Isolated 4-20mA Output...
  • Page 31 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION DESIGN & ENGINEERING Wiring Diagram for ELDS 1000 Receiver with Current Source @ 4-20 (1)
  • Page 32 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION DESIGN & ENGINEERING Wiring Diagram for ELDS 1000 Receiver with Current Sink @ 4-20 (1)
  • Page 33 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION DESIGN & ENGINEERING Wiring Diagram for ELDS 2000 Receiver with Isolated 4-20 (1) & 4-20 (2)
  • Page 34 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION DESIGN & ENGINEERING Wiring Diagram for ELDS 2000 Receiver with Current Sources @ 4-20 (1) & 4-20 (2)
  • Page 35 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION DESIGN & ENGINEERING Wiring Diagram for ELDS 2000 Receiver with Current Sinks @ 4-20 (1) & 4-20 (2)

  • Page 36: Transmitter Electrical Connections

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION DESIGN & ENGINEERING 3.3.4 Transmitter Electrical Connections The terminal compartment of the Transmitter of an ELDS 1000 / 2000 Series OPGD contains an 8-way terminal block, by means of which most electrical connections to the unit can be made.
  • Page 37 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION DESIGN & ENGINEERING Wiring Diagram for ELDS 1000 / 2000 Series Transmitter...

  • Page 38: Power Supply Connections & Wiring

    INSTALLATION DESIGN & ENGINEERING 3.3.5 Power Supply Connections & Wiring The Senscient ELDS™ gas detector is designed to be operated from a nominal 24V DC supply. For correct operation, the supply voltage reaching the terminals must be within the range to 32V.

  • Page 39: Installation & Commissioning

    3) Check the contents for damage and against the packing note for deficiencies. In the event of damage or loss in transit, notify the carrier and Senscient or your local agent immediately. 4) Ensure that the installer/end user of the equipment receives the technical...
  • Page 40 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING NOTE: A complete shipment of an ELDS 1000 / 2000 Series OPGD system consists of the following items. 1 x ELDS™ Transmitter Assembly 1 x ELDS™ Receiver Assembly...
  • Page 41 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 2 x Mounting Brackets...

  • Page 42: General

    INSTALLATION & COMMISSIONING Installation Procedure 4.1.1 General The Senscient ELDS™ 1000 / 2000 Series OPGD is designed to allow installation and alignment to be performed by a single, trained technician. The installation procedure is split into mechanical installation and electrical installation.

  • Page 43: Pole Mounting

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING Attach the mounting bracket to the wall or similar vertical surface using suitable fixing bolts as illustrated below. The choice of fixing will depend on the nature of the surface and should take regard of the weight of the unit (~13kg).

  • Page 44: Mounting A Transmitter Or Receiver

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 4.1.2.3 Mounting a Transmitter or Receiver Mount a Transmitter or Receiver unit onto the bracket as illustrated below. The retaining nut should be tightened to 45Nm (wrench tight) to ensure that the unit is secure.

  • Page 45: Mounting A Cross Duct Transmitter Or Receiver

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 4.1.2.4 Mounting a Cross Duct Transmitter or Receiver Attach the self-adhesive mounting templates to the duct wall in the position identified for mounting of the Cross Duct ELDS system. Using the templates, drill and cut the necessary mounting holes in the opposite sides of the duct.
  • Page 46 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING Bolt Mounting Plates on each side of the duct. Bolt a Transmitter or Receiver unit to the corresponding Mounting Plate.

  • Page 47: Electrical Installation

    ELDS OPGDs is presented in Sections 3.3.1-3.3.5. Alignment In order to maximize operational reliability and availability, Senscient recommends that the alignment and commissioning of ELDS™ 1000 / 2000 Series OPGDs should be performed by personnel trained by Senscient or authorised trainers.
  • Page 48 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING Adjustment Block M12 Clamping Nut M6 Locking Screw...

  • Page 49: Final Alignment Using Telescope

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 4.2.2 Final Alignment Using Telescope Final alignment of ELDS OPGDs can be performed by a single technician using the following equipment:-  Alignment Telescope (see Appendix C, section 11)  2×M6 hex (Allen) key Notes: Ideally, final alignment should be performed on a clear, dry day.
  • Page 50 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING The unit’s alignment datum is the flat, circular ring on the front of each unit’s telescope mounting ring. When the alignment telescope is correctly mounted, its datum is sitting flat against the unit’s alignment datum.
  • Page 51 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 2) With the centration fingers touching the edge of the telescope mounting ring, firmly push the back surface of the gripping mechanism forwards towards the unit. 3) Push the back surface of the gripping mechanism forward until all three (3) gripping...
  • Page 52 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING...
  • Page 53 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 4) When all three (3) gripping fingers have clipped into the gripping recess on the telescope mounting ring, carefully release the alignment telescope, allowing it to be pulled against the unit’s mounting datum by the gripping mechanism.
  • Page 54 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 6) Once the alignment telescope is correctly mounted on the unit’s alignment datum, gently rotate the telescope such that the eye-piece is in a convenient position for viewing. 7) With the eye-piece in a convenient position for viewing and the alignment datum’s in...

  • Page 55: Final Alignment Procedure

    Correct Final Alignment Notes: 1) Unlike NDIR OPGDs, Senscient ELDS 1000 / 2000 Series OPGDs are not critically sensitive to alignment. 2) A small improvement in alignment can be achieved by performing alignment adjustments whilst monitoring the received signal levels using SITE running on a laptop or iRoc.
  • Page 56 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 3) In order to use the alignment telescope correctly, it is necessary to view the image produced by the telescope correctly. This requires the user to position one of their eyes on the axis of the alignment telescope.
  • Page 57 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 5) If the user’s eye is not on the axis of the alignment telescope, an elliptical image field will be seen, as below. For correct use of the alignment telescope, the user must keep their eye on-axis, which will result in them seeing a symmetrical, circular image field.

  • Page 58: Making Alignment Adjustments

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 4.2.2.3 Making Alignment Adjustments The Receiver and Transmitter units of ELDS OPGDs are mounted on brackets that allow precision alignment adjustments in the horizontal and vertical directions. Precise adjustments of horizontal and vertical alignment can be made using the opposed pairs of M6 adjustment screws on the mounting bracket assembly.
  • Page 59 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 2) Initially, it is likely that the alignment will be quite a long way from ideal. When it is necessary to make relatively large alignment adjustments it is best to identify which direction needs to be moved in, and to loosen off the adjustment screw that would oppose such a movement.
  • Page 60 Do NOT try to adjust the cross-hairs using the alignment telescope's elevation and windage adjusters. These have been factory set. Unauthorised adjustments of alignment telescopes will lead to systems being incorrectly aligned. Return an alignment telescope to Senscient if a problem with its alignment is suspected.
  • Page 61 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 4) When the aligner is getting close to achieving a good alignment, they should screw in both pairs of adjustment screws such that the tips of these screws are in contact with their points of action.
  • Page 62 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 6) When the aligner is happy that a good, final alignment has been achieved, the alignment should be locked-off, by simultaneously rotating the opposed pair of adjustment screws in the opposite direction against each other. Performed correctly, this locking-off step should not affect the adjustment but should ensure that both adjustment screws are tight and that there is no play in the alignment of the unit.

  • Page 63: Cross Duct - Alignment Requirements

    Commissioning The commissioning process can be performed by a single, trained technician using the Senscient Installation and Test Environment (SITE) running on a laptop or an iRoc PDA. The commissioning procedure requires that each receiver is ‘paired’ with the appropriate transmitter unit.

  • Page 64: Configuring Site - Adding Users

    1) Start the SITE software, the initial screen will invite the user to log-in to the program as the administrator. 2) The appropriate password is “S3nsci3nt” (Senscient with each “e” replaced by “3”, note the case sensitivity also). Enter this password and then press the “OK” button, the main...

  • Page 65: Commissioning A System - Transmitter

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 3) Select the “Admin” button, this generates the following dialogue screen 4) To add a new user, simply fill in the fields for Operator ID Number, Username and the optional Password (leave this blank to allow access to SITE without password protection).
  • Page 66 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING Purple - A Black - B 2) Start the SITE software, a login screen will be presented, enter the appropriate user name and password and press OK. 3) From the various button options available select “Commission Unit” as illustrated.
  • Page 67 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING powered press the “Next” button, SITE will then present the following screen while it interrogates the unit connected. 5) After a short delay SITE will report the type of unit found as illustrated below.
  • Page 68 Senscient ELDS™ INSTALLATION & COMMISSIONING 7) Senscient uses the unit serial number as the default Tag. If this is acceptable then select “Leave Default”, otherwise select “Add Tag”. In this case the following dialogue is presented; edit/change the displayed Tag as required then select “Next” to continue. Note that either a real keyboard or the on-screen virtual keyboard may be used to change the Tag data.
  • Page 69 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 9) Select “Next” to proceed past this advisory screen. 10) For transmitter units there is no current requirement to check the operation of the 4- 20mA output (which is available for future feature expansion), so select “Skip” to proceed past this option without undertaking any tests.
  • Page 70 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 11) The opportunity to change/select the behaviour of the 4-20mA drive is then presented. Again for transmitter units it is not necessary to consider any configuration of this so select “Leave Defaults”...
  • Page 71 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 13) Select “Next”, the following screen is then presented. 14) Select “Next” to this screen to complete the process, SITE then returns to the main selection screen. Disconnect the RS485 A and B leads from the transmitter’s terminal block.

  • Page 72: Commissioning A System - Receiver

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING The transmitter installation is now completed. 4.4.3 Commissioning a System - Receiver 1) Open the receiver’s terminal compartment and connect the RS485 A & B leads from the laptop to the corresponding terminals on the receiver’s terminal block (Positions 11 (RS485(A) - Purple &...
  • Page 73 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 3) If the receiver unit is already powered up, it should be detected and the following screen will appear. If the receiver unit is not correctly connected or not powered up, rectify the problem and wait for the receiver to be detected.
  • Page 74 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 6) SITE will normally select the last transmitter that was installed as the default option. If this is not correct then select the appropriate unit from the drop-down list. Note that units are identified by the Tag number so it is important that the installer is aware of the appropriate Tag number that was entered on the unit which the receiver is to be paired with.
  • Page 75 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 10) Assuming that the transmitter and receiver units have been satisfactorily aligned with respect to each other and there is nothing obscuring the beam-path, SITE will display the following screen, indicating that the signals are okay.
  • Page 76 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 13) IF the Signal Low screen is displayed: Check that the lens-windows of both the transmitter and receiver are clean, and that there is nothing obscuring the beam-path between the transmitter.
  • Page 77 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 17) In order to continue with the commissioning process, the cause of the ‘No Signal’ problem must be identified and corrected. Perform checks to establish which of the reasons listed at 16) is causing the problem experienced and where possible correct this problem.
  • Page 78 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 21) Verify that there is no target gas in the system’s beam-path, and once this has been verified click Next to zero the system. Caution: Zeroing a system with target gas in the beam-path will result in a positive offset on the unit’s zero position.
  • Page 79 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 23) If you do not want to re-zero the unit, click “Leave Zero Data” and then click Next to move on. 24) If you elect to re-zero the unit then, the following screen will be displayed.
  • Page 80 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 27) If you are happy that the zeroing process was performed satisfactorily, click Next to save the zeros in the system. 28) If any of the events below occurred during the zeroing process, the zero might not be correct.
  • Page 81 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 30) Click Next to move onto the next step in the commissioning process. 31) SITE will now ask you if you would like to enter a tag number for the unit. This is recommended as it will give the unit a recognisable ID when subsequently communicating with the unit using Bluetooth, or downloading event history logs.
  • Page 82 33) Select “Leave Default” if you do not want to enter a tag number. In this case the Senscient serial number of the unit will be left as the default tag number, then click Next to move on to the next step in the commissioning process.
  • Page 83 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 37) When you are ready to check the 4-20mA output and loop, click Next. 38) SITE will now give you the option of performing 4-20mA loop tests with a forced 4-20mA output.
  • Page 84 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 41) If SITE is displaying the screen below, use the up and down arrows to the side of the current setting box to set the current to be output by the receiver unit and when you are happy with the value click the Set 4-20mA button followed by Next.
  • Page 85 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 44) SITE wants to make sure that you have checked the 4-20mA output and loop before it allows the system to be fully commissioned. To this end, SITE requires you to click the check box next to the 4-20mA Circuits Checked statement - before you can proceed any further.
  • Page 86 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 46) The behaviours that can be configured are Inhibit current, Fault current, Beam Block current, the Time between detecting a beam blocked state and raising the associated warning, the Time between loosing optical signal and detecting/declaring a beam blocked state, the Low Signal state current, the Time between detecting low signal and entering the low signal state and the over-range current.
  • Page 87 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 50) Select “Next” to proceed. 51) SITE will then write a commissioning log, this takes a few seconds to implement and completes with the following screen 52) Select “Next” to proceed, the following screen is then displayed.
  • Page 88 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 53) Disconnect the RS485 A and B leads from the receiver’s terminal block. 54) Carefully replace the terminal compartment lid and screw it down firmly. Caution: Both the explosionproof protection and the ingress protection of the ELDS OPGD system rely upon the terminal compartment lid being screwed down fully.

  • Page 89: Installation Checklist

    Installation Checklist The following information is for the guidance of personnel carrying out installation checks / tests on Senscient ELDS™ OPGDs. In general it should be noted that: Installation of ELDS™ 1000 / 2000 Series OPGDs should be performed by personnel trained by Senscient or authorised trainers.
  • Page 90 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING As an approximate guideline, a sufficiently rigid mount/supporting structure will only move a few millimetres (not more than 6mm) when leaning body weight against it. When pushed hard and released, the mount/supporting structure should return quickly to its original position and should not wobble or sway.
  • Page 91 Version 1.06 Iss 4 ECR111 Senscient ELDS™ INSTALLATION & COMMISSIONING 4 - 20mA Loop Integrity Test the 4 - 20mA loop integrity by forcing the unit to output a known current and monitoring this at the control room or with a multimeter inserted into the loop. Update the appropriate box.

  • Page 92: Functional Testing

    In addition to the use of SimuGas, it is also possible to test the function of ELDS OPGDs using methodologies that physically introduce target gas into the monitored beam-path. For these purposes, Senscient provides a Gassing Cell that can be used in conjunction with ELDS OPGDs.
  • Page 93 Version 1.06 Iss 4 ECR111 Senscient ELDS™ FUNCTIONAL TESTING Using the signal reaching the reference detector through the retained gas sample, the transmitter’s microcontroller is capable of determining the precise bias and wavelength modulation components that need to be applied to the laser diode(s) in order to ensure that absorption of the laser diode’s optical radiation by target gas always produces a Harmonic...

  • Page 94: Electronically Synthesised Harmonic Fingerprints - Simugas

    This means that an ELDS transmitter can electronically simulate the presence of a quantity of target gas in the monitored beam-path. Senscient refers to this type of electronically simulated gas as SimuGas When the receiver of an ELDS OPGD receives signals from the transmitter which include...

  • Page 95: Simugas Tm Auto

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ FUNCTIONAL TESTING SimuGas Auto The simplest way for users to realise the considerable safety integrity benefits provided by SimuGas technology is to configure ELDS OPGDs to perform SimuGas Auto. When so configured, the transmitter will perform a SimuGas test with a known level every 24 hours;...

  • Page 96: Simugas Tm Inhibited

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ FUNCTIONAL TESTING SimuGas Inhibited A SimuGas Inhibited test enables a Simu-Gas functional test to be performed without the receiver signalling a gas reading on its 4-20mA output(s). The purpose of the receiver not signalling the gas reading during this test is to avoid unwanted initiation of executive actions by the safety system, such as shut-downs or audible alarms.

  • Page 97: Simugas Tm Live

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ FUNCTIONAL TESTING SimuGas Live A SimuGas Live test enables a Simu-Gas functional test to be performed with the receiver signalling the quantities of gas calculated present in the monitored beam-path on its 4-20mA output(s).

  • Page 98: Testing With The Gassing Cell

    FUNCTIONAL TESTING Testing with the Gassing Cell Senscient’s ELDS OPGDs are supplied factory calibrated and cannot be re-calibrated in the field because experience has shown that accurate OPGD calibration can only be achieved in a controlled factory environment. Where customers must undertake calibration checks, these can be performed using the Gassing Cell, but users are advised that such checks are far more likely to be in error than the original factory calibration.
  • Page 99 Int(lel.m) = Integrated LEL.m reading output by Senscient ELDS™, ELDS = Length of cell in metres (0.236 for the Senscient Calibration Cell), cell Conc = Gas concentration in %v/v and = Lower Explosion Limit of the gas in %v/v.
  • Page 100 Version 1.06 Iss 4 ECR111 Senscient ELDS™ FUNCTIONAL TESTING WARNING Take the necessary precautions to ensure safety when dealing with flammable or toxic gases The Gassing Cell utilises thin film windows which are relatively fragile. Avoid touching these during use and also ensure that no over-pressure is applied to the cell during the filling...

  • Page 101: Testing Cross Duct Elds Systems With The Gas Challenge Cell

    FUNCTIONAL TESTING Testing Cross Duct ELDS Systems with the Gas Challenge Cell Senscient’s Cross Duct ELDS systems are supplied factory calibrated and cannot be re- calibrated in the field. Where users must undertake calibration or response checks with real gas, these can be performed using the Cross Duct Gas Challenge Cell. However, the user is cautioned that such checks will have error margins that are significantly larger than those for the original factory calibration.
  • Page 102 ELDS unit’s original factory calibration. This is why most OPGD manufacturers (including Senscient) do not allow...
  • Page 103 Version 1.06 Iss 4 ECR111 Senscient ELDS™ FUNCTIONAL TESTING in-field gas calibration of this type of gas detector and recommend that gas response checks only be treated as ‘bump-tests’ not calibration accuracy checks. Cross Duct ELDS systems can be supplied with 4-20mA outputs scaled for 0-10%LEL, 0- 25%LEL and 0-100%LEL.
  • Page 104 Version 1.06 Iss 4 ECR111 Senscient ELDS™ FUNCTIONAL TESTING Once the Challenge Cell Aperture is uncovered, the Cross Duct Gas Challenge Cell can be inserted into the measurement path of the Cross Duct ELDS system that is being tested as...
  • Page 105 Version 1.06 Iss 4 ECR111 Senscient ELDS™ FUNCTIONAL TESTING Fully insert the cell as illustrated below GAS CHALLENGE CELL CORRECTLY LOCATED Verify the response of the Cross Duct ELDS system being tested by monitoring the system’s 4-20mA output or the gas reading using SITE. After completing the test, remove...

  • Page 106: Maintenance

    Scheduled Inspection, Cleaning & Testing Senscient is aware that many of the sites and facilities using gas detection equipment have working practices or procedures that require gas detectors to be serviced and tested in accordance with a schedule.
  • Page 107 Version 1.06 Iss 4 ECR111 Senscient ELDS™ MAINTENANCE *CAUTION: Do not use aggressive solvents or abrasives on the lens-windows of Senscient ELDS™ OPGD units. Note: The infrared laser beam emitted by ELDS OPGDs is invisible and eye safe.

  • Page 108: Cleaning The Lens-Windows Of Elds Opgds

    PROBLEM SOLVING Cleaning the Lens-Windows of ELDS OPGDs The optics of Senscient’s ELDS OPGDs were designed in the expectation that operational service would result in the exposed surfaces of the TX & RX lens-windows becoming contaminated by the various airborne contaminants encountered at Oil & Gas facilities around the world.
  • Page 109 Version 1.06 Iss 4 ECR111 Senscient ELDS™ PROBLEM SOLVING Polish the dry lens-window with a dry, clean portion of cleaning cloth, making sure that no film is left behind. If you have had to rub the lens-window hard to get any contaminants off, it is possible that you might have disturbed the alignment of the system.

  • Page 110: Problem Solving

    Refer to the troubleshooting tables in this chapter for a list of problems, possible causes and actions. CAUTION: Senscient ELDS™ does not contain any user serviceable parts. Do not open either the Transmitter or Receiver unit. The warranty of units which have been opened may be invalidated.
  • Page 111 Version 1.06 Iss 4 ECR111 Senscient ELDS™ PROBLEM SOLVING connections 3) Check that the unit has the correctly configured 4 - 20mA output for use with the controller that it is connected to Heavy contamination of Check Transmitter Receiver optics windows for build up of contamination.
  • Page 112 Version 1.06 Iss 4 ECR111 Senscient ELDS™ PROBLEM SOLVING state 2) If unit remains in INHIBIT, check the +24V supply is reaching the unit. If the voltage is below +18V or is fluctuating above and below +18V, the unit may...
  • Page 113 1) Verify that there is no gas in the beam position path 2) Re-zero the unit. Unit appears to be Misinterpretation of Senscient ELDS OPGDs do not report reporting a INHIBIT, BEAM-BLOCK negative gas readings on the 4-20mA. negative gas or LOW SIGNAL...
  • Page 114 1) Remove power from the TX unit report TX developed in the TX unit 2) Safely remove TX unit from service and Hardware Fault return to Senscient for repair SITE Diagnostics A Hardware Fault has 1) Remove power from the RX unit report RX...

  • Page 115: Specifications

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ SPECIFICATIONS 8 SPECIFICATIONS SYSTEM Gases & Ranges For Methane, the following LEL concentrations are assumed; units are appropriately calibrated in the factory depending on the intended geographical location. Geographical Location %vv for 1LEL...
  • Page 116 Version 1.06 Iss 4 ECR111 Senscient ELDS™ SPECIFICATIONS Environmental Parameter Value Ingress Protection IP66/67 Enclosure Material 316L stainless steel or aluminium A6082 Operating Temperature -40ºC to +60ºC (Including Storage) Humidity 0 - 100% (non-condensing) Vibration FM 6325 10-150Hz EN50241 10-55Hz...
  • Page 117 Parameter Value Calibration Units are supplied factory calibrated for the specified target gas or gases. Units should not require re- calibration in service Part Number Examples Senscient ELDS V-GGGG-C Range Short Range Cross Duct GGGG Gas & Range Stainless 1010 0 - 1000ppm.m CH...

  • Page 118: Certification

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ CERTIFICATION 9 CERTIFICATION General Baseefa: ATEX (Europe) II 2 G Ex d IIB + H2 T5 II 2 D Ex tD A21 IP66/67 T100°C -40 to +60ºC EC-Type Examination Certificate No: Baseefa10ATEX0066X Quality Assurance Notification (QAN) No: FM10ATEXQ0010...

  • Page 119: Atex Label Combustible Or Combustible And Toxic

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ CERTIFICATION 9.1.1 ATEX Label Combustible or Combustible and Toxic ATEX Certification Label for Tx Unit (Receiver is Similar) Unique Part number Unique serial No. Product description Warning Manufacturers Instructions trademark/address Hot surface symbol warning...

  • Page 120: Control Drawing Cenelec / Atex

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ CERTIFICATION 9.1.2 Control Drawing CENELEC / ATEX...

  • Page 121: Appendix A - I.roc Pda

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ APPENDIX A APPENDIX A - i.Roc PDA Not available at present.

  • Page 122: Appendix B - Glossary

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ APPENDIX B 10 APPENDIX B - GLOSSARY 10.1 Terminology Ex d Flame proof or explosion proof within the confines of European standards EN60079-0,1. An enclosure that can withstand the pressure developed during the internal explosion of an explosive mixture and that prevents transmission of the explosion to the explosive atmosphere surrounding the enclosure.

  • Page 123: Abbreviations

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ APPENDIX B ppm.m Parts (by volume) per million metres. This is a similar measure to LEL.m, i.e it represents the integrated concentration of gas over the path length of the measurement. However it is used for toxic gases which are generally measured in much lower concentrations than flammable gases.

  • Page 124: Appendix C - Accessories & Spare Parts

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ APPENDIX C 11 APPENDIX C - ACCESSORIES & SPARE PARTS 11.1 System Units The following tables list the part numbers for available accessories and spare parts. All types of Transmitters and Receivers originally supplied included an integral conduit or gland entry and mounting brackets, however mounting bracket bolts and other such accessories are not included.
  • Page 125 Version 1.06 Iss 4 ECR111 Senscient ELDS™ APPENDIX C The following two diagrams identify the correct component assembly locations for fitting the rear compartment lid anti tamper bar, as well as the internal and external earths (see below). Ensure that these components are assembled and fitted in the correct positions.

  • Page 126: Manufacturer's Ec Declaration

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ MANUFACTURER’S EC DECLARATION OF CONFORMITY 12 MANUFACTURER’S EC DECLARATION...

  • Page 127: Manufacturer's Contact Details

    Version 1.06 Iss 4 ECR111 Senscient ELDS™ MANUFACTURER’S CONTACT DETAILS 13 MANUFACTURER’S CONTACT DETAILS Senscient Ltd. Unit A2, Arena Business Centre Holy Rood Close Poole Dorset BH17 7FJ United Kingdom +44 (0)1202 606460 www.senscient.com...

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Elds 2000 series

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