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YOKOGAWA TDLS200 Addendum Instruction Manual
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YOKOGAWA TDLS200 Addendum Instruction Manual

YOKOGAWA TDLS200 Addendum Instruction Manual

Tunable diode laser analyzer . furnaces, heaters & large scale combustion
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1
TDLS200 Tunable Diode Laser Analyzer
Addendum Instruction Manual
Furnaces, Heaters &
Large Scale Combustion
IM11Y01B01-12E-A
2nd Edition

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Summary of Contents for YOKOGAWA TDLS200

  • Page 1 TDLS200 Tunable Diode Laser Analyzer Addendum Instruction Manual Furnaces, Heaters & Large Scale Combustion IM11Y01B01-12E-A 2nd Edition...
  • Page 2 CAN BE PERMANENTLY DAMAGED Laser Safety & Classification according to FDA Regulations. The TDLS200 is registered with the United States FDA as a Laser Product Please carefully read the appropriate Sections of this User Guide. The TDLS200 Tunable Diode Laser (TDL) Analyzer is a technologically advanced instrument that requires the appropriate care when handling, installing and operating.
  • Page 3 within this addendum supersede any conflicting statement contained within the standard Users Guide IM11Y01B01-12E-A 2nd Edition...
  • Page 4 1 Combustion Overview 1.1 Introduction In this addendum to the Users Guide for TDLS200, the installation for combustion is detailed. This information pertains to oxygen and CO/CH4 analyzers. Some typical combustion related installations are outlined below: Ethylene Cracking Furnaces, Refinery Heaters, Reformer Units, VCM Cracking •...
  • Page 5 In a standard TruePeak TDLS200 analyzer, the laser beam exiting the launch unit is normally collimated parallel before hitting the opposing detect unit. The collimated beam size is typically less than 1” diameter. However, this optical layout is not appropriate for long-path applications (the dimension of process is longer than 23’).

  • Page 6: Installation

    Installation 2.1 Process Measurement Point Considerations The following criteria should be considered when selecting the installation point in respect to the process conditions: Process Gas Flow Conditions – Laminar, homogenous gas concentration distribution • conditions across the measurement point are recommended. For circular ducts/stacks this condition is generally at least three unimpaired diameters (D) before and after a process bend.
  • Page 7 Window Purge Gas Flow Adjustment – While there is no specific formula for this purge gas flow rate (due to the many variables/complexity), we include the following information that might help optimize the window purge gas flow rates actually at site. As mentioned in the User’s Guide, the window purge flow rate can vary by application from as little as 5 lts./min up to as much as 50 lts./min for typical process applications.
  • Page 8 2.2 Position of Process Flanges for Launch and Detect Units: Process flanges should be located on the process such that the Launch and Detect Units can be installed, accessed removed in a safe and convenient manner. The following criteria/Check List should be met at a minimum: Good, Safe Engineering practices •...
  • Page 9 Clearance for Launch Unit: Ensure there is sufficient clearance and access for the Launch unit: IM11Y01B01-12E-A 2nd Edition...
  • Page 10 Clearance for Detect Unit: Ensure there is sufficient clearance and access for the Detect unit: IM11Y01B01-12E-A 2nd Edition...
  • Page 11 Dimensions for combustion process interface devices: Above: 3” 150# ANSI RF (option for Launch unit alignment bellows) Above: 4” 150# ANSI RF (option for Launch unit alignment bellows) Above: 4” 150# ANSI RF Large Aperture Optics (detect side, LAO) IM11Y01B01-12E-A 2nd Edition...
  • Page 12 The standard flange sizes are either 2” 3” or 4” 150# R.F. ANSI as well as DN50 and DN80. Please check the exact flange size specified and provided for the particular installation. Other flange sizes and a variety of materials (to suit the process) are available so please check these details prior to installing the flanges on the process.
  • Page 13 Process Flange Welding Alignment and Line-Up The Launch and Detect units are provided with alignment mechanisms that allow for some manual adjustment of the laser beam direction in both planes. It is however recommended that the following angular tolerances be adhered to as closely as possible. IM11Y01B01-12E-A 2nd Edition...
  • Page 14 IM11Y01B01-12E-A 2nd Edition...
  • Page 15 IM11Y01B01-12E-A 2nd Edition...
  • Page 16 Details of supporting structural steel for long optical path length systems (>7m/21ft): It is important that the angle support steel (used for supporting the nozzle) be welded directly to both the walls and the adjacent heater/furnace structural steel as shown conceptually below – Note;...
  • Page 17 ≥10” ≥10” Note: The TDLS200 flange must be at least 10” from the furnace wall. Heat will damage the optics at distances less than 10” from the furnace wall!!! The above preferred method may not be possible in every site specific situation. The actual dimensions may have to be adjusted to suit the practical installation considerations in each case but it should remain as close as possible to the above ‘preferred’...
  • Page 18 Case A below shows this preferred method and case B below shows an alternative method if the ‘preferred’ method cannot be accommodated at the particular site installations: Above – Preferred angle mounting above – Alternate angle mounting Below: Image of actual installation as Case A – preferred method IM11Y01B01-12E-A 2nd Edition...
  • Page 19 Mounting the Launch and Detect Units to the Process Flange Securely bolt the Launch and Detect (LAO) Units to the process flanges using the standard bolt holes/studs provided. Ensure the correct size bolts, nuts, and gasket are used in accordance with the flange specifications and in accordance with the process specifications when applicable.
  • Page 20 C (1100 Installations: The following procedure will aide in performing an alignment of the TDLS200 analyzer. The procedure will guide the technician through the necessary steps to align and optimize the signal of the analyzer. Please read the entire procedure before starting work and ask your local Yokogawa service group for further information if required.
  • Page 21 IM11Y01B01-12E-A 2nd Edition...
  • Page 22 Above: Zero Transmission/No Signal Above: 0.2% Transmission/small signal IM11Y01B01-12E-A 2nd Edition...
  • Page 23 • Once visual alignment is achieved on both the launch and detect and clean, dry purge gas has been flowing, power may be applied to the analyzer. • Begin the alignment process by starting at the launch end; maximize the signal (using the transmission signal and value) by moving the launch around using the alignment bellows.
  • Page 24 • The launch and detect alignment steps may need to be repeated several times to ensure maximum transmission. • Once maximum transmission is achieved, move to the next step and ensure the laser is centered. • This is done by “sweeping” the laser across the detector in both the horizontal and vertical axis.
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  • Page 28 (i.e. with variable degree of background radiation >800 C) application using an oscilloscope (or scope-meter). Please read the entire procedure before starting work and ask your local Yokogawa service group for further information if required. This procedure can also be performed by local Yokogawa service personnel if required –...
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  • Page 32 • Once visual alignment is achieved on both the launch and detect, power may be applied to the analyzer. • Begin the alignment process by starting at the launch unit to maximize the signal by moving the launch around using the alignment bellows while watching the scope screen. . •...
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  • Page 36 Caution – Electrostatic Sensitive! INTRODUCTION For TDLS200 measurement over long optical path length, the laser beam is usually configured with • a small diverging angle (either with or without large aperture detector lens). In factory, the detector signal gain is not optimized for the real installation.
  • Page 37 Factory gain resistors on the detector board: R21 = ________; R22 = ________; R23 = ________. • PROCEDURE 1. This procedure requires wearing a grounding strap connected to one of the grounding lugs of the analyzer to prevent any electrostatic damage. 2.
  • Page 38 If the current R22 and R23 are already 24.3kΩ (the greatest value available in the resistor bag), please contact Yokogawa for assistance. 9. Close the detector enclosure. Write down the final values of R21, R22 and R23 below for record.
  • Page 39 4 Contact for Further Assistance Should you require any further information or details not contained herein, then please contact your local Yokogawa Office, Yokogawa Distributor or Yokogawa Sales Representative or Yokogawa Laser Analysis Division directly as listed below: Yokogawa Laser Analysis Division...