Siemens LDS 6 Operating Instructions Manual
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Siemens LDS 6 Operating Instructions Manual

Siemens LDS 6 Operating Instructions Manual

In-situ laser gas analyzer
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Operating Instructions Edition 12/2007
LDS 6
In-situ Laser Gas Analyzer
Sensor CD 6C manual
gas analysis
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Summary of Contents for Siemens LDS 6

  • Page 1 Operating Instructions Edition 12/2007 LDS 6 In-situ Laser Gas Analyzer Sensor CD 6C manual gas analysis...
  • Page 3 Introduction Preparations for Installation Installation Guidelines In Situ Laser Gas Analyzers Technical Description LDS 6 Sensor CD 6C Operating Spare Parts List Instructions Dimensional Drawings Operating Instructions Appendix ESD guidelines 12/2007 A5E00912721-02...
  • Page 4 Trademarks All names identified by ® are registered trademarks of the Siemens AG. The remaining trademarks in this publication may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.

  • Page 5: Table Of Contents

    Table of contents Introduction..............................5 Introduction ............................5 Preparations for Installation ........................7 Flanges ............................7 2.1.1 Flange Installation Requirements ....................7 2.1.2 Installation of Flanges ........................8 2.1.3 Measurement of Path Length......................9 Sensor Installation Requirements ....................10 The Hybrid and Loop Cables .......................10 2.3.1 Cable Installation Requirements ....................10 2.3.2 Identification of Cables.........................11...
  • Page 6 Table of contents Appendix..............................41 Gas Flow Calculations ........................ 41 Tool kits ............................42 ESD guidelines ............................45 ESD (ElectroStatic Discharge) ....................45 Sensor CD 6C Operating Instructions Operating Instructions, 12/2007, A5E00912721-02...

  • Page 7: Introduction

    Purpose The purpose of this manual is to provide support for the customer when installing, maintaining and servicing the sensor for the LDS 6 laser gas analyzer. This manual describes the preparations, installation and maintenance. It also specifies the environmental conditions and space requirements.
  • Page 8 Introduction 1.1 Introduction Trademarks The following names are registered trademarks of Siemens AG: ● LDS 6 ● LDSComm The remaining trademarks in this publication may be trademarks, whose use by third parties for their own purposes could violate the rights of the owner.

  • Page 9: Preparations For Installation

    Preparations for Installation Flanges 2.1.1 Flange Installation Requirements Before the gas analyzer and its sensors can be used, a pair of process flanges should be installed at the measurement site. The flanges must be installed at a safe and accessible position to make installation and service easy to accomplish.

  • Page 10: Installation Of Flanges

    When welding the flange tubes it is recommended to have the Flange Alignment Kit. The Flange Alignment Kit from Siemens consists of a light source, two flanges, an aiming tool, a battery and a battery charger for the light source.

  • Page 11: Measurement Of Path Length

    Preparations for Installation 2.1 Flanges Note It is important that the flanges are aligned from both sides. Therefore, remember to shift light source and aiming tool and repeat the procedure from the other side as well. It is also important that the sensor flanges are oriented in such a way that the spring loaded bolts are located in the lower section of the flange.

  • Page 12: Sensor Installation Requirements

    DO NOT remove the protective tube until the cable is installed and ready to be connected to LDS 6 and sensors. DO NOT remove the plastic protective cap until the cable is routed inside the LDS 6/sensor. The protective tubes should only be removed by authorized personnel.

  • Page 13: Identification Of Cables

    A to B and B to A. It does not matter which way the cable is installed. Hybrid cables are installed between the LDS 6 and the transmitter sensor. OXXX are hybrid cables for oxygen systems only and are installed between the LDS 6 and the transmitter sensor.

  • Page 14: Check List

    2.4 Check list Check list Go through the following points before beginning the installation of the LDS 6 laser gas analyzer to make sure all preparations are completed. ● The flanges shall be welded to the wall of the furnace or funnel and properly aligned from both sides.

  • Page 15: Installation Guidelines

    Installation Guidelines Installation This chapter provides instructions for the installation of the CD 6C sensors and cables. The figure below shows the principle set-up of the LDS 6 central unit, sensors and cables. (for sensor head) (for process, if applicable)
  • Page 16 Installation Guidelines 3.1 Installation Installation of the sensors It is necessary to remove the air moisture inside the sensor heads. The transmitter and receiver sensor heads are delivered from the factory with readily mounted nitrogen purge connections: Nitrogen inlet (1), purging tube (2) and the check valve (3), see Figure 3.2 "Sensor mounting –...
  • Page 17 Installation Guidelines 3.1 Installation The installation process should follow these steps. 1. Unpack the transmitter and receiver and connect them to customer flanges using provided M16 screws. Orientation of both the receiver and transmitter flanges has to be such so that the check valve (3) faces downwards. 2.

  • Page 18: Electrical Connections

    Installation Guidelines 3.2 Electrical connections Electrical connections Transmitter Install the cables, hybrid and loop cable, at the transmitter sensor. Cables are fixed in the sensor with gaskets. Always use lubricant on the gaskets before installing, otherwise these will be very difficult to remove later. Multi-mode fiber (SMA connector) and 24 V are just connected straight through to the receiver.

  • Page 19: Alignment

    Installation Guidelines 3.3 Alignment Alignment In addition to the standard sensor alignment kit used with the CD 6 sensors, two alignment adaptors are provided. The adapter marked with a blue line is used to align the receiver sensor. Blue line Figure 3-5 CD 6C alignment kit Align the sensors in the following steps:...
  • Page 20 Installation Guidelines 3.3 Alignment Release the transmitter lock ring using the supplied tool and remove the sensor: Transmitter side Figure 3-7 Removal of the transmitter lock ring Figure 3-8 Removal of the sensor at the transmitter side Sensor CD 6C Operating Instructions Operating Instructions, 12/2007, A5E00912721-02...
  • Page 21 Installation Guidelines 3.3 Alignment Mount the enclosed alignment adapter at the transmitter side: Figure 3-9 Removal of the sensor at the transmitter side Mount the cross-hair at the transmitter adapter: Figure 3-10 Cross hair mounted at the transmitter adapter Sensor CD 6C Operating Instructions Operating Instructions, 12/2007, A5E00912721-02...
  • Page 22 Installation Guidelines 3.3 Alignment At the receiver side, remove the sensor correspondingly: Receiver side Figure 3-11 Removal of sensor at receiver side Fasten the supplied alignment plate. It screws on easily with the help of an O-ring. The alignment plate is included in the supplied alignment kit, Order No. A5E00253142. Turn the flashlight on and mount it on the alignment plate.
  • Page 23 Installation Guidelines 3.3 Alignment Once the flashlight is mounted at the receiver side, return to the transmitter side. A light dot should be visible at in the cross hair. Figure 3-13 Light dot at the transmitter side Start by unscrewing the four hexagonal screws a few millimeters and make sure that the loose section can be adjusted in all directions.
  • Page 24 Installation Guidelines 3.3 Alignment Move the flashlight from the receiver to the transmitter side. At the receiver side, mount the corresponding adapter (with a blue line) and the cross hair. Receiver side Figure 3-15 Mount of linearization adapter at receiver side Again, adjust the four alignment screws until the light dot is centered in the cross hair at the receiver side.
  • Page 25 Installation Guidelines 3.3 Alignment Receiver side Figure 3-17 Light dot at the receiver side When the light dot is centered fasten the four screws with the light dot still centered in the cross hair. Once the screws are tightly fastened, remove the cross hair, flashlight and two adapters.

  • Page 26: Atex Considerations

    4. Connect the hybrid cable to the transmitter sensor. Connecting Receiver to Transmitter Sensor For ATEX versions of the LDS 6 the receiver sensor are pre-mounted with special ATEX electronics and surge protection. The green phoenix contact mounted on the sensor card is already connected with a red wire for +24 V and a black wire for GND.

  • Page 27: Purging

    Ambient air contains roughly 1% water vapor. Therefore the sensor heads must be purged with a very dry gas like nitrogen. Since the resolution of the water vapor application of LDS 6 is better than 1 ppm the nitrogen should be correspondingly dry.
  • Page 28 Installation Guidelines 3.5 Purging Gas Purging of process optics (if applicable) This is the standard solution to keep the wedge windows free from contamination. When H is measured a very dry purging gas is essential. If process purging is applied the sensor is supplied with an inlet check valve for semi-rigid tube with an inner diameter of 4 mm (0.16") and an outer diameter of 6 mm (0.24").

  • Page 29: Technical Description

    Technical Description The Hybrid Cable The hybrid cable is constructed for very harsh environments and consists of two optical fibers, one for transmission of the laser light to the measurement volume (single-mode fiber) and one for the return of the detected signal (multi-mode fiber). Two twisted electrical wires are used for powering the electronics in the sensor (24 VDC).

  • Page 30: The Cd 6C Sensor

    Technical Description 4.3 The CD 6C sensor The CD 6C sensor The cross duct sensor, CD 6C (shown below) is designed for in situ measurements. It consists of a transmitter and a receiver creating a single path measurement situation. The beam diameter is expanded to about 25 mm in order to improve performance in high dust load (>1 g/m ) applications.

  • Page 31: The Cd 6C Ex Sensor

    Technical Description 4.4 The CD 6C Ex sensor The CD 6C Ex sensor Each measurement channel is available in this ATEX version for measurements in explosive areas. The CD 6C Ex sensor is used for measurements in these kind of measurements. In this ATEX version the CD 6C Ex sensor is used.

  • Page 32: Technical Specification

    The lens in the receiver focuses the incoming laser light on the detector where it is converted to an electrical signal. This signal is amplified and converted to an optical signal and returned to the central unit LDS 6. Sensor CD 6C Operating Instructions...
  • Page 33 Technical Description 4.5 Technical Specification Item Specification Dimension, sensor box Ø: 163 mm, D: 105 mm Dimension, purging tube L: 400, 800 or 1200 mm, OD: 44 mm, ID: 40 mm. Custom length of up to 1300 mm is also available.

  • Page 35: Spare Parts List

    Spare Parts List Spare Parts CD 6C exists in two versions as a consequence of a major upgrade. One of the CD 6C spare parts is affected by the change and will consequently exist in two different versions. The "Sensor electronic" spare parts consist of one detector and one detector PCB (A5E00681433) respectively.
  • Page 36 CD 6C, High pres. window DN80/PN16 A5E00534671 Alignment kit CD 6C A5E00534673 Please note that three of the LDS 6 sensor electronic spare parts are version dependent. (The PCB:s are not affected but detector electronics are different). Spare parts sensors electronics Product description Order no.

  • Page 37: Repair/Upgrade

    Your will find the serial number on the rating plate on the central unit. Address of the responsible repair location, your contact, list of spare parts etc. can all be found on Internet: http://www.siemens.com/automation/service&support or http://www.automation.siemens.com/partner Sensor CD 6C Operating Instructions...

  • Page 39: Dimensional Drawings

    Process Flange Dimensions The process flange dimensions should comply to the DIN standard (DN80/PN16) or the ANSI standard (ANSI 4"/150 lbf). The process flange dimensions are shown below. Customer process flanges are not supplied by Siemens. 8 x Ø18 Figure 6-1...
  • Page 40 Dimensional Drawings 6.1 Process Flange Dimensions 8 x Ø(for 5/8" bolt) Figure 6-2 Dimensions of the flange (ANSI 4"/150lbf) Sensor CD 6C Operating Instructions Operating Instructions, 12/2007, A5E00912721-02...

  • Page 41: Sensor Dimensions

    Dimensional Drawings 6.2 Sensor Dimensions Sensor Dimensions The dimensions of the sensors CD 6C: Ø163 Ø 200 1. High pressure flange. 2. Sensor purging check valve. 3. Process purging check valve. (only if process purging is applied) Sensor CD 6C Operating Instructions Operating Instructions, 12/2007, A5E00912721-02...

  • Page 43: Appendix

    Appendix Gas Flow Calculations Gas flow calculations are slightly complex because gases are compressible fluids whose density changes with pressure. In this application we are dealing with choked flow. The outlet pressure is less than one half of the inlet pressure and the gas reaches sonic velocity in the valve.

  • Page 44: Tool Kits

    Appendix A.2 Tool kits Tool kits Siemens provide toolkits to be used for installation, maintenance and service of the LDS 6 laser gas analyzer. These toolkit are described in this appendix. Flange Alignment Kit The Flange Alignment Kit (shown below) is intended for use when installing the two opposite process flanges on the measurement volume.
  • Page 45 Appendix A.2 Tool kits The Flange Alignment Kit also contains a description of how to use the kit and t graph that shows how to measure the error angle to see if the flanges are properly aligned. The graph (shown below) shows the angle error as a function of the light spot distance from the centre at the limits of the focal distance setting of the tool.
  • Page 46 Appendix A.2 Tool kits Sensor Alignment Kit The Sensor Alignment Kit (shown below) is used for installation and re-alignment of the sensors. The kit includes five tools, described in the table below, and an instruction for alignment of the sensors. The instruction is found on the inside of the case. 1.

  • Page 47: Esd Guidelines

    ESD guidelines ESD (ElectroStatic Discharge) ESD is the rapid, spontaneous transfer of electrostatic charge induced by a high electrostatic field. Electrostatic damage to electronic devices can occur at any point from manufacture to field service. Damage results from handling the devices in uncontrolled surroundings or when poor ESD control practices are used.
  • Page 48 All equipment must be connected to grounded outlets and all personnel must wear wrist straps connected to the bench mat using a cord. Bench mat, wrist strap and lightweight cord can be provided from Siemens Laser Analytics in the ESD kit. Sensor CD 6C Operating Instructions...
  • Page 50 Siemens Aktiengesellschaft @ A 5 E 0 0 9 1 2 7 2 1 @ Automation and Drives (A&D) A5E00912721 Sensors and Communication Process Analytics 76181 KARLSRUHE GERMANY www.siemens.com/processanalytics A5E00912721-02...

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