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YOKOGAWA ZS8 User Manual

YOKOGAWA ZS8 User Manual

Flameproof zirconia oxygen analyzer
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User's
Manual
Model ZS8
Flameproof
Zirconia Oxygen Analyzer
TM
IM 11M7A3-01E
IM 11M7A3-01E
6th Edition

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Summary of Contents for YOKOGAWA ZS8

  • Page 1 User’s Manual Model ZS8 Flameproof Zirconia Oxygen Analyzer IM 11M7A3-01E IM 11M7A3-01E 6th Edition...

  • Page 2: Preface

    Do not attempt to modify or mount additional parts in the unit, otherwise, it affects the safe operation or damages the unit. Media No. IM 11M7A3-01E 6th Edition: Nov. 2019 IM 11M7A3-01E All Rights Reserved Copyright © 1996, Yokogawa Electric Corporation...
  • Page 3 <PREFACE> WARNING • Before opening the cover of the ZS8C converter, remove power and make sure of non- hazardous (*) atmospheres. • When the ambient temperature of the converter exceeds 50ºC, use wire resistant to 70ºC or greater for external wiring. (*) The text plate says "Open circuit at non-hazardous location before removing cover,"...

  • Page 4: Introduction

    Introduction  The EXA OXY Model ZS8 Flameproof Oxygen Analyzer is used for combustion status monitoring or control in processes which require combustion control in every field. There are several types of EXA OXY detectors, and the auxiliary equipment needed for optimum measurement are also available.
  • Page 5 It is recommended that you read the description. Trademark Notices • EXA OXY is a trademark of Yokogawa Electric Corporation. • All other company and product names mentioned in this user’s manual are trademarks or registered trademarks of their respective companies.

  • Page 6: Precautions For Flameproof Instruments

    <PREFACE> Precautions for Flameproof Instruments  General Instruments with Flameproof construction (hereafter referred to as flameproof instruments) are tested and certified by the public authority in accordance with the Labor Safety and Health Laws of Japan. A certified instrument is provided with a certification label and a nameplate that states specifications required for explosion protection performance.
  • Page 7 <PREFACE> External Wiring for Flameproof Instruments External wiring for flameproof instruments must employ cable wiring. Securely ground all non- live metal parts. For details, see USERS’ GUIDELINES for Electrical Installation for Explosive Gas Atmospheres in General Industry, issued by the Research Institute of Industrial Safety of the Ministry of Labor in Japan, 1994.
  • Page 8 The flameproof packing glands used at the external wiring connection ports of Flameproof instruments conforming to IEC standards are certified in combination with the flameproof instruments. Therefore, only those flameproof packing glands specified by Yokogawa should be used. IM 11M7A3-01E...

  • Page 9: After-Sales Warranty

    • Failure of components which are out of scope of warranty stated in instruction manual. • Failure of components which are out of scope of warranty stated in instruction manual. • Failure caused by usage of software, hardware or auxiliary equipment, which Yokogawa did not supply.

  • Page 10: Table Of Contents

    <CONTENTS> Model ZS8 Flameproof Zirconia Oxygen Analyzer IM 11M7A3-01E 6th Edition CONTENTS PREFACE......................i Introduction ....................iii  Precautions for Flameproof Instruments ............v  After-Sales Warranty .................viii  General ...................... 1-1 System Configuration ..................1-1 Specifications ....................1-6 1.2.1 General Specifications ............... 1-6 1.2.2...
  • Page 11 <CONTENTS> Installation of Converter ................. 2-18 2.4.1 Installation Site ................. 2-18 2.4.2 Converter Mounting ................. 2-18 Installation of Flow Setting Unit ..............2-19 2.5.1 Installation Site ................. 2-19 2.5.2 Flow Setting Unit Mounting ............. 2-20 Installation of Calibration Gas Unit Case ............. 2-21 2.6.1 Installation Site .................
  • Page 12 <CONTENTS> 4.6.2 ZS8C Converter Communication (RS-422-A) Specifications ..4-13 Contact Output Wiring ..................4-21 4.7.1 Cable Specifications ................ 4-21 4.7.2 Wiring Procedure ................4-21 Contact Input Wiring ..................4-22 4.8.1 Cable Specifications ................ 4-22 4.8.2 Wiring Procedure ................4-22 Wiring for Solenoid Valve ................4-22 Components and Their Functions ............
  • Page 13 <CONTENTS> 8.1.1 Principles of Zirconia Oxygen Analyzer ..........8-1 8.1.2 Calibration Gas .................. 8-2 8.1.3 Compensation ..................8-2 8.1.4 Characteristic Data from a Sensor Measured During Calibration ..8-3 Calibration Procedures ..................8-4 8.2.1 Operation Flowchart of Semi-Automatic and Automatic Calibrations 8-4 8.2.2 Operation Flowchart ................
  • Page 14 <CONTENTS> 10.2.4 Others ....................10-9 10.3 Measures When Measured Value Shows an Error ........10-9 10.3.1 Measured Value Higher Than True Value ........10-9 10.3.2 Measured Value Lower Than True Value ........10-11 10.3.3 Measured Value Sometimes Show Abnormal Values ....10-11 Customer Maintenance Parts List ..........CMPL 11M7A3-01E Customer Maintenance Parts List ..........CMPL 11M7A3-03E Customer Maintenance Parts List ..........CMPL 11M7A3-04E...
  • Page 15 Blank Page...

  • Page 16: General

    ZA8F flow setting unit and making zero and span gases flow. As stated above, since the ZS8 flameproof zirconia oxygen analyzer is provided with a number of functions and many auxiliary units, the optimum system can be constructed by selecting the units matching an application.
  • Page 17 <1. General> Examples of System Configuration (1) Example of Heat Insulation with Electric Heater (for the ZS8D-L flameproof detector) Hazardous Non-hazardous ZS8D location location Flameproof detector Conduit *1 Pressure gauge 20kPa *4 ZS8C Wiring for heat insulation Flameproof converter Provided by heaters Stop valve Air set 4 to 20mA DC...
  • Page 18 <1. General> (2) Example of Heat Insulation with Electric Heater (for the ZS8D-H flameproof high- temperature detector) Pressure gauge 98kPa *4 Air set Stop valve Auxiliary ejector air Non-hazardous location ZS8C Conduit *1 Pressure gauge 20kPa *4 Flameproof Hazardous location Wiring for heat insulation converter Provided by heaters...
  • Page 19 <1. General> (3) Example of Steam Trace Heat Insulation (for the ZS8D-L flameproof detector) Hazardous Non-hazardous ZS8D location location Flameproof detector ZS8C Conduit *1 Pressure gauge 20kPa *4 Flameproof Steam outlet converter Steam inlet Stop valve Air set 4 to 20mA Ejector air DC output Interior of...
  • Page 20 <1. General> (4) Example of Steam Trace Heat Insulation (for the ZS8D-H flameproof detector) Conduit *1 Pressure gauge 98kPa *4 Stop valve Air set Auxiliary ejector air Hazardous Non-hazardous ZS8C location location Steam outlet Pressure gauge 20kPa *4 Flameproof Steam inlet converter Stop valve Air set...

  • Page 21: Specifications

    <1. General> Specifications 1.2.1 General Specifications Measurement Target: Oxygen concentration in combustion exhaust gases and mixed gases (excluding flammable gases) Measurement System: Zirconia system Flameproof Construction: Detector; Exd II BT3X (Max. surface temperature of 200°C) Converter; Exd II BT6 (Max. surface temperature of 85°C) Used condition of Flameproof Converter: (a) Before opening the cover, remove power and make sure of non-hazardous...

  • Page 22: Characteristics

    <1. General> 1.2.2 Characteristics Repeatability: ± 0.5% of span (0 to 5 vol%O or more and up to 0 to 25 vol%O range) Linearity: ± 1% of span(0 to 5 vol%O or more and up to 0 to 25 vol%O range) [Sample gas pressure: within + 4.9 kPa ] The following conditions must be satisfied.
  • Page 23 <1. General> Heat insulation provided by electric heaters Specify only when gas fuel is used. Power consumption; 200 VA for ordinary use, maximum of 400 VA; Temperature: 130°C (Gas fuel) Reference Gas: Instrument air 300 ml/min ± 20% Calibration Gas: Instrument air and standard gas 600 ml/min ±...
  • Page 24 <1. General> Model and Suffix Codes Option Model Suffix code Description code ZS8D · · · · · · · · · General-purpose detector (0 to 800°C) · · · · · · · · · High-temperature detector (800 to 1400°C) Flameproof ·...
  • Page 25 1-10 <1. General> (3) External Dimensions Flameproof General-purpose Detector (ZS8D-L-J-A--1-N--)  — Model for Steam Heater Providing Heat Insulation — Unit: mm Insertion length l (405) <4> Ejector inlet Ejector Ejector <5> Mounting flange <1> Reference gas outlet <4> Ejector outlet Carborundum filter øA øB...
  • Page 26 1-11 <1. General> Flameproof General-purpose Detector (ZS8D-L-J-A--2---)  — Model for Electric Heater Providing Heat Insulation — Unit: mm Insertion length l (405) <3>Ejector inlet Ejector Approx. 280 <1>Reference gas outlet <3>Ejector outlet øA øB Approx. 83 Approx. 93 Approx. Approx.
  • Page 27 1-12 <1. General> Flameproof High-temperature Detector (ZS8D-H-J-L-010-1-N-N-H)  — Model for Steam Heater Providing Heat Insulation — Unit: mm <4> Ejector inlet Ejector Ejector Insertion length l <4> Ejector outlet <1> Reference gas outlet (Approx. 150) Ø155 Ø130 Approx. 83 Approx.
  • Page 28 1-13 <1. General> Flameproof High-temperature Detector (ZS8D-H-J-L-010-2--N-H)  — Model for Electric Heater Providing Heat Insulation— Unit: mm <3> Ejector inlet Approx. 280 Ejector <1> Reference gas outlet <3> Ejector outlet ø155 ø130 Approx. 83 Approx. 93 Approx. Insertion Approx. 250 length l (405) (Approx.

  • Page 29: High Temperature Probe Adaptor Zs8P-H

    1-14 <1. General> 1.2.4 High Temperature Probe Adaptor ZS8P-H (1) Specifications The ZS8P-H probe adaptor is required for the ZS8D-H high-temperature probe. Sample Gas Temperature: 0 to 800°C (when SUS310S probe is used) 800 to 1400°C (when SiC probe is used) Sample Gas Pressure: −1.5 to +5 kPa Insertion Length:...
  • Page 30 1-15 <1. General> (3) External Dimensions Ejector for Probe adaptor Unit: mm Gasket (1.5 mm in thickness) Ejector for Detector ⇨ Approx. 215 <1> Flange ø60.5 øA Mounting flange Approx. 48 Detector provided by the user K9292WA (Rc 1/4)／K9292WB (1/4 NPT) (Insertion length L) High temperature Probe ø52 over...

  • Page 31: Flameproof Converter Zs8C

    1-16 <1. General> 1.2.5 Flameproof Converter ZS8C (1) Specifications Display Section: Measured value display section: 4-digit LED; Talk and response display: 40-character dot matrix LCD with backlight Display Content: LED; Oxygen concentration (vol%), error code display LCD; Measured value group A (1st level) Analog bar (output range, alarm setpoints, simultaneous display), max./min.
  • Page 32 1-17 <1. General> Contact point 1; NC, normally energized (1) Abnormal Contact point 2; NO, normally de-energized (6) Entry + (10) Calibration + (8) Warm-up Contact point 3; NO, normally de-energized, (3) Hi alarm + (5) Lo alarm Contact Output for Solenoid Valve: Solid State Relay (Triac) output: 2 points Contact capacity;...
  • Page 33 1-18 <1. General> Ambient Temperature: −20 to +55°C Power Supply: 100, 115 V AC +10%, −15%, 50/60 Hz Construction: JIS C0920 waterproof, NEMA3 or equivalent (when the openings for conduits are completely sealed) Power Connection Inlet: Seven G3/4 holes Air-purge: Rc1/4 or 1/4NPT(F) connection (optional) Approx.
  • Page 34 1-19 <1. General> (3) External Dimensions Unit: mm DATA MEAS MAINT FAIL vol%O Approx.54 2-inch (JIS 50 A) mounting pipe (option code: /p) 28.5 28.5 28.5 28.5 28.5 28.5 186.5 103.5 Six G3/4 openings for wiring (with flame arrester) Seven G3/4 openings for wiring (without flame arrester) 55.5 Purge air inlet (optional) Option code:...

  • Page 35: Options

    1-20 <1. General> 1.2.6 Options (1) Check Valve K9292DN/K9292DS This is used to prevent entry of the process gas into the calibration-gas line. It is incorporated in the product as standard. If it is necessary to have one as a spare part, select it according to the specifications.
  • Page 36 1-21 <1. General>  Part No. Part No. Part No. K9292VB Auxiliary ejector assembly for detector, 1/4NPT with a pressure gauge and needle valve K9292VA Auxiliary ejector assembly for detector, Rc1/4 with a pressure gauge and needle valve K9292VF Ejector joint (for auxiliary ejectors), 1/4 NPT K9292VE Ejector joint (for main ejectors), Rc1/4 Auxiliary ejector assembly for probe adaptors, 1/4 NPT, with a pressure gauge and needle...
  • Page 37 1-22 <1. General> (3) Flow Setting Unit ZA8F  Specifications Used when instrument air is provided. This unit controls flow rates of calibration gas and reference gas and consists of flowmeter and flow rate control valve. FIowmeter: Calibration gas; 0.1 to 1.0 l/min. Reference air; 0.1 to 1.0 l/min. Construction: Dust-proof and rainproof construction Case Material:...
  • Page 38 1-23 <1. General>  External Dimensions Ø6 holes Unit: mm REFERENCE CHECK REFERENCE SPAN ZERO 2-inch mounting pipe 235.8 222.8 Calibration gas outlet Span gas inlet Zero gas inlet Reference gas outlet Model Piping connection port A Piping connection port A ZA8F-J*C 5-Rc1/4 ZA8F-A*C...
  • Page 39 1-24 <1. General>  Part No. Part No. G7003XF K9473XK Description Primary Pressure Max. 1 MPa G Max. 1 MPa G Secondary Pressure 0 to 200 kPa G 0 to 200 kPa G Connection Rc1/4 1/4NPT with adaptor Material Zn alloy Zn alloy ...
  • Page 40 1-25 <1. General> Case Paint: Baked epoxy resin Paint Color: Jade green (Munsell 7.5BG 4/1.5) Mounting: Two-inch pipe mounting Weight: Approx. 3.6 kg  External dimensions Calibration Gas Unit Unit: mm Regulator G7013XF/ G7014XF Zero gas cylinder (G7001ZC) (158.3) 2-inch pipe (O.D.:60.5) The oblique line is an opening portion.
  • Page 41 1-26 <1. General> Cylinder Pressure Regulator Secondary Primary pressure pressure Unit : mm gauge gauge W22 (Right- Regulator handle handed screw) Stop valve Secondary * Outlet safety valve Primary safety valve Approx. 59 Approx. 82 Approx. 163 Approx. 174 F1.16E.ai Part No.

  • Page 42: Installation

    Industry, issued by the Research Institute of Industrial Safety of the Ministry of Labor in Japan, 1994. This chapter describes procedures for installation of the major units composing the ZS8 flameproof zirconia oxygen analyzer (including those in optional use) as shown below.

  • Page 43: Detector Installation

    <2. Installation> Locknut (Vertical) Range of possible insertion hole construction 100mm Deflector Gas flow Flange : Install the rating Deflector adjustment flange the same as that for the detector. (Horizontal) (Note) Diameter of 100mm 60mm or more (Note) : 95mm dia. or more for return to inside of furnace JIS flange ANSI flange F2.1E.ai...

  • Page 44: Heat Insulation

    <2. Installation> 2.1.5 Heat Insulation CAUTION For explosion protection standards, the lagging surface temperature must be 200°C or less. The path of the gas flow in the probe must be heat-insulated above the dew point to prevent clogging due to condensation. a.

  • Page 45: Detector Installation

    <2. Installation> Flange: Install the rating flange 100mm A space of 52 mm or the same as that for more in diameter, and 100mm the probe adaptor long enough for the length of the probe A space of 52 mm or more in diameter, and long enough for the length of the probe Never mount the probe...

  • Page 46: Ejector Installation

    <2. Installation> Install the detector so that the probe tip is pointed downward. For SiC probes, mount it within 5 degrees of the vertical. F2.3E.ai Figure 2.3 Installing the High-temperature Detector 2.2.4 Ejector Installation For a high-temperature detector, two ejectors (main ejector: attached as standard; auxiliary ejector: optional) are required.

  • Page 47: Heat Insulation

    <2. Installation> d. If there is positive pressure at the sampling point above 500 Pa and also release to the atmosphere is possible, main and auxiliary ejectors are not necessary. In this case, In this case, mount the needle valve on the auxiliary ejector mounting port and adjust it so that the temperature near the probe adaptor is 200°C.

  • Page 48: Methods To Change The Surface Temperature

    <2. Installation> b. Heat Insulation by Steam Heater Use a steam heater to heat the frame arrestor portion to maintain its temperature above the dew point of the measuring gas. Be sure to maintain the surface temperature of the steam heater below 200°C in accordance with the explosion protection standards.

  • Page 49: Fitting A Thermal Insulating Jacket (Option)

    <2. Installation> <When the surface temperature falls below the dew point of measuring gas> (1) If the probe adapter and detector are not thermally insulated, insulate them. (See section 2.3) If they are thermally insulated, enhance the thermal insulation effect by, for example, increasing the thickness of the heat insulating material.
  • Page 50 <2. Installation> A. Heat insulation of detector Please install the jacket as below:  In the case of electric heater Procedure 1: Before install the jacket (Appearance) Procedure 2: Fit the heat - insulate material (Plate) Make the flange side of detector probe on top (The side of electric heater for heat- insulation), undo the magic tape on plate heat-insulate material and let the magic tape on side face to the terminal box of detector, than insert it to the plate heat-insulate material.
  • Page 51 2-10 <2. Installation> Procedure 3: Fit the heat insulating material (Body) Undo the magic tape on body heat insulate material, cover the heat-insulate electric heater from side of detector terminal box, and take care of : make flexible pipe from electronic hearter go through the surface of heat-insulate material ;...
  • Page 52 2-11 <2. Installation>  In the case of steam hearter Procedure 1: Wrap and fix the heat-insulate material Wrap the copper pipe on the flame arrester of detector with ring-like heat-insulate material. Fix the ring-like heat-insulate on the copper pipe tightly by magic tape. Please refer to photo by procedure 5 that the installation of jacket is finished.
  • Page 53 2-12 <2. Installation> Procedure 3: Fit the heat insulating material (Body) Undo the magic tape on body heat insulate material, cover the copper pipe of steam by heat-insulate electric material from side of detector terminal box. Please take care of: Make the pipe from ejector go out from the hole in two side of heat-insulate material.
  • Page 54 2-13 <2. Installation> Procedure 5: Fix the heat insulating material on the detector Stick the magic tape of plate heat insulate material on the side of heat insulate material (Body). And then wrap the detector up with magic tape of the side of terminal box, stick it tightly and fix it by rope at last.
  • Page 55 2-14 <2. Installation> Procedure 2: Fix the heat-insulate jacket (For inside). Wrap the Frame adapter tightly with wrapped jacket, and fix it by magic tape. Please make the ejector out from the heat-insulate jacket. Procedure 3: Fit the heat-insulate jacket (For outside) Please undo the magic tape of outside heat-insulate jacket, make the mounting flange out from the jacket as photo above, then put the probe adapter (With inside heat-insulate jacket) in it.

  • Page 56: Heating And Insulation Range When Not Using A Heat-Insulating Jacket

    2-15 <2. Installation> Procedure 4: Fix the outside heat-insulate jacket Finish the fitting of heat-insulate jacket by locking all the side magic tape. Please confirm your fitting by the photo above. If the condition temperature is below the dew point, please keep heat-insulate by steam or electric heater.
  • Page 57 2-16 <2. Installation> Be sure to heat and insulate the steam pipe. Heat and insulate the ejector to maintain its temperature above the oxygen dew point (Note 1) Steam The pipe (for ejector air) needs to be heated and insulated after it has been pre-heated. (Detector’s ejector air pre-heating section) Wrap the detector’s ejector air pipe firmly around the steam pipe.
  • Page 58 2-17 <2. Installation> Carry out heating and insulation work to maintain the temperature of the ejector above the oxygen dew point (Note 1) Pre-heating section’s pipe (for ejector air) needs to be heated and insulated. The ejector’s outlet pipe needs to be heated and insulated.

  • Page 59: Installation Of Converter

    2-18 <2. Installation> Installation of Converter 2.4.1 Installation Site Install the converter by selecting a location where: (1) the explosion protection standards are satisfied. (2) the indicated oxygen concentrations and messages are legible and key operation is easy (avoiding exposure to direct sunlight), (3) inspection and maintenance are easy, (4) the ambient temperature is not too high (max.

  • Page 60: Installation Of Flow Setting Unit

    2-19 <2. Installation> Wall Mounting (1) Drill four mounting holes on the wall as shown in Figure 2.10. Unit: mm 4-ø9 holes or 4-M8 screws F2.5E.ai Figure 2.10 Machining of Mounting Holes (2) Mount the converter. Securely fix the converter with four screws. (Note) For wall mounting, install the wall mounting bracket on the back of the converter.

  • Page 61: Flow Setting Unit Mounting

    2-20 <2. Installation> 2.5.2 Flow Setting Unit Mounting The flow setting unit can be mounted on a pipe (nominal 50A) or on the wall. As the flow setting unit incorporates a flowmeter, be sure to mount the unit vertically so that no error occurs. Mount the unit in the following procedure: Pipe Mounting (1) Provide a vertical mounting pipe (nominal 50A, OD of 60.5 mm) with sufficient strength.

  • Page 62: Installation Of Calibration Gas Unit Case

    2-21 <2. Installation> Installation of Calibration Gas Unit Case The calibration gas unit case is a case for storing the G7001ZC zero-gas cylinder. The Installation procedure for the case when used is as follows: 2.6.1 Installation Site Install the calibration gas unit case by selecting a location according to the following considerations: (1) Convenience in replacement of the cylinder (2) Easy access for inspection...
  • Page 63 Blank Page...

  • Page 64: Piping

    <3. Piping> Piping System Piping is described for the system configuration shown in Figure 3.1. Pressure gauge 98kPa *4 Stop valve Air set Auxiliary ejector air Hazardous location Non-hazardous location Steam outlet Pressure gauge 20kPa *4 Steam inlet Stop valve Air set Heat 4 to 20mA...

  • Page 65: Parts Required For Piping

    Also mount the pressure regulator for the cylinder (recommended by Yokogawa) to the cylinder. Attach a check valve to the calibration gas inlet of the detector as shown in Figure 3.2 (the detector is shipped with the check valve attached).

  • Page 66: Reference Gas Piping

    <3. Piping> Unit: mm Reference With sealing plug gas inlet Calibration gas inlet 3-G3/4 holes Check valve for wiring Calibration gas inlet F3.2E.ai Figure 3.2 Connection of Check Valve to the Calibration Gas Inlet Reference Gas Piping • The reference gas piping is provided between the air supply (instrument air) and the flow setting unit and between the flow setting unit and the detector.

  • Page 67: Purge Gas Piping

    <3. Piping> Purge Gas Piping If there are corrosive gases in the atmosphere, or if the ambient temperature at the converter- installed location is high, purge the inside of the converter with air. Connect a copper or stainless steel pipe to the purge air inlet. Set the supply air to about 50 kPa. Unit: mm 28.5 28.5...

  • Page 68: Wiring

    <4. Wiring> Wiring This chapter describes procedures for wiring to be provided for the Model ZS8C Flameproof Converter. WARNING (1) Never turn on the power before wiring work is completed, construction work conforming to the explosion protection standards is over, and the converter cover is mounted. Otherwise, there is the danger of ignition or an explosion depending on the atmosphere around the instrument.

  • Page 69: Care During Wiring

    <4. Wiring> If the ambient temperature of the detector-installed location exceeds 60°C, do not use crimp-on terminal lugs with an insulation sleeve or insulation tape. This may cause poor contact at the terminals because resin is parched at high temperatures and toxic gases are generated.
  • Page 70 <4. Wiring> Unit: mm 8.3mm M3.5 F4.1E.ai Figure 4.1 Detector Terminal Arrangement Shield Shield Communi- CELL – cation Thermo- Detector Fuse Signals – couple 250V 3A – Contact Cold Input – Junction – Shield Analog Output ZERO – 4-20 mA DC SPAN Sole- noid...

  • Page 71: Cables

    • For wiring a cable with the lead-in procedure using flameproof packing, be sure to use the external cable lead-in utensils specified by Yokogawa. Part numbers in Yokogawa for these external cable lead-in utensils are as shown below depending on conduit connection screw size.

  • Page 72: Mounting Of Cable Gland

    <4. Wiring> 4.1.4 Mounting of Cable Gland Mount a specified cable gland (external wire lead-in utensil) in a converter cable inlet port except for implementation of conduit work. Unit: mm O-ring Converter Lock nut Washer Packing (Select one from the table below depending on the cable OD.) Approx.

  • Page 73: Wiring For Detector Signal

    <4. Wiring> Wiring for Detector Signal This wiring is made so that the converter receives the cell output, thermocouple output, and cold junction compensating signal from the detector. Lay the wiring cable so that each signal wire resistance including each return wire is 10Ω or less. Also lay the cable away from the power cables.

  • Page 74: Wiring For Detector Heater Power

    <4. Wiring> Wiring for Detector Heater Power 4.3.1 Wiring for Sensor Heater Power (In the case of steam heater) This wiring is for supplying power to the heater to heat the sensor in the detector from the converter. Detector Converter 16 Detector 17 Heater 2-conductor shielded wire...

  • Page 75: Wiring For Analog Output

    <4. Wiring> Wiring for Analog Output This wiring is for transmitting a 4 to 20 mA DC output signal to an instrument, e.g., a recorder. Maintain a load resistance of 550Ω or less. Converter Receiving Instrument (+) 26 (–) 27 –...

  • Page 76: Power And Ground Wiring

    <4. Wiring> Power and Ground Wiring CAUTION Confirm the power supply specifications and supply proper power. If an improper power supply is used, burn-out may occur or operation may be disabled. These are for supplying driving power and for grounding the converter. Converter Detector L1 L2...
  • Page 77 4-10 <4. Wiring> Ground terminal (screw: M5) F4.10E.ai Figure 4.9 Position of the Detector Ground Terminal Ground terminal (screw M5) F4.11E.ai Figure 4.10 Position of the Converter Ground Terminal IM 11M7A3-01E...
  • Page 78 4-11 <4. Wiring> Figure 4.11 Wiring Diagram IM 11M7A3-01E...

  • Page 79: Digital Communication Wiring

    4-12 <4. Wiring> Digital Communication Wiring If communications via an RS-422-A interface is intended, connect the converter to the personal computer which you are using. This section also describes the ZS8C converter communication specifications as well as wiring procedure. 4.6.1 Wiring of RS-422-A Communication Cable RS-422-A communications can be carried out by connecting up to eight converters to one computer.

  • Page 80: Zs8C Converter Communication (Rs-422-A) Specifications

    4-13 <4. Wiring> If the ground Three twisted-pair potentials of shlelded cable each converter may differ, do the wiring using The shield must sufficiently thick be grounded on conductors. either the 18 19 20 21 9 32 18 19 20 21 9 32 + –...
  • Page 81 4-14 <4. Wiring>  Command Interpretation RC (Request Calibration) Function ”Zero and span calibration start request” signal, or “calibration abort” signal (Note) Set the ZS8C converter calibration mode to “Auto” or “Semi-auto.” Data structure (1) Received data Delimiter 0: calibration start; 1: calibration stop (Comma) ZS8C converter channel number (1 to 8) (Space)
  • Page 82 4-15 <4. Wiring> DT (Data Trigger) Function The latest measured data and the date & time are taken into the communication memory inside the ZS8C converter. Data structure (1) Received data Delimiter ZS8C converter channel number (1 to 8) (Note 1) (Space) Command (Note 1)
  • Page 83 4-16 <4. Wiring> Data Format for DR Command Communication (Transmission) (1) Transmission format (data) ’ (Apostrophe) (Slash) (Slash) (Comma) Month Year (Colon) (Comma) (Comma) Status code S : 1 Measurement mode S : 2 Maintenance mode Minute Hour (Slash) (Comma) Alarm code A : 00 No alarm A : HH High-high alarm...
  • Page 84 4-17 <4. Wiring> Data Format for DR Command Communication (2) Transmission format (data) W E 0 1 0 (Comma) Unit Oxygen concentration value ≥ 10.0 → 010.0_ < 10.0 → 009.99 Wet concentration/dry concentration WE: Wet concentration DY: Dry concentration A V 0 2 (Comma) Unit...
  • Page 85 4-18 <4. Wiring> Data Format for DR Command Communication (3) Transmission format (data) C E + 0 7 (Comma) Unit (mV) Electromotive force value (000.0 to 200.0) Positive or negative sign (+/-) Cell emf 5 0 C (Space) (Comma) Unit C: °C Temperature value (0000 to 1000)
  • Page 86 4-19 <4. Wiring> Data Format for DR Command Communication (4) Transmission format (data) R P 0 0 (Space) (Comma) Unit (seconds) Response time (000 to 999) Cell response time (Slash) (Space) (Comma) Cell life guideline (000 to 012) Cell life ranking (0 to 5) Sensor (cell) life P 5 5 These data cannot be used.
  • Page 87 4-20 <4. Wiring> Data Format for DR Command Communication (5) Transmission format (data) R A 0 0 0 (Slash) (Comma) Span side (0 to 100) Zero side (0 to 100) Range 1 (Slash) (Comma) Span side (0 to 100) Zero side (0 to 100) Range 2 ‘...

  • Page 88: Contact Output Wiring

    4-21 <4. Wiring> Contact Output Wiring The converter can output a maximum of three contact signals. These contact outputs can be used for 13 applications (see Subsection 6.1.8) freely selecting up to three required items, e.g., “low-limit alarm” or “high-limit alarm.” When using these contact outputs, do the wiring as illustrated below.

  • Page 89: Contact Input Wiring

    4-22 <4. Wiring> Contact Input Wiring The converter can respond to a maximum of two contact input signals received. These contact input signals can be selected from five types of signals, e.g., the “range selection command” or “calibration gas under-pressure alarm.” When using these contact inputs, do the wiring as illustrated below.

  • Page 90: Components And Their Functions

    <5. Components and Their Functions> Components and Their Functions This chapter describes the components of main units composing the EXA OXY flameproof zirconia oxygen analyzer and their functions. Detector 5.1.1 General-purpose Detector Terminal box This is of rainproof construction. Probe Sensor mounting This part is inserted into section...

  • Page 91: High-Temperature Detector (With A High-Temperature Probe Adaptor)

    <5. Components and Their Functions> 5.1.2 High-temperature Detector (with a high-temperature probe adaptor) Needle valve Main ejector Needle valve Auxiliary ejector Sample gas outlet port When the pressure of a measurement gas is negative, the auxiliary ejector assembly must be connected. If the temperature does not decrease to 200degC or less under high-...

  • Page 92: Converter

    <5. Components and Their Functions> Converter Data display Message display Measured oxygen concentration Messages for states, value is displayed. If an error interactions, and occurs, an error code is complementary descrip- displayed. tion can be displayed Status display The present status such as the operating status is indicated by indicator lamps.

  • Page 93: Flow Setting Unit

    <5. Components and Their Functions> Flow Setting Unit Reference gas flow Span-gas flow Zero-gas flow setting valve setting valve setting valve Reference gas flowmeter Calibration gas flowmeter ZA8F Flow Setting Unit F5.4E.ai Figure 5.4 Components of Flow Setting Unit and Their Functions IM 11M7A3-01E...

  • Page 94: Operation

    <6. Operation> Operation In this Chapter, the basic operation methods for the EXA OXY Explosion proof Zirconia Oxygen Analyzer are described. Startup The general procedures for starting up are as follows: Inspect the piping & wiring conditions See Section 6.1.1. Check the heat insulation conditions See Section 6.1.2.

  • Page 95: Checking Of Set Valves

    <6. Operation> 6.1.3 Checking of Set Valves Inspect the valves as follows depending on your system: (1) If a needle valve is mounted at the calibration gas inlet of the detector, completely open this valve beforehand. (2) When instrument air is used as the reference gas, set the secondary pressure of the air so that the air pressure becomes 70 to 100 kPa.
  • Page 96 <6. Operation> Also upon shipment, the data read and loaded into the converter are in the default state. Thus, upon commencement of operation, set the data to match each operation. Table 6.1 shows the setting items and their default values. Refer to it when setting data. In addition, to enter the password 16 or key operations when data is set, see Chapter 8.
  • Page 97 <6. Operation> <Details about Selecting Set Data> C-0 Span gas concentration You can set the oxygen concentration for your span gas used for calibration. If the air at the detector installation site is taken in or the instrument air is used as a span gas, set the value at 21 vol% O (i.e., nearly the same oxygen concentration of clean air) by entering “021.00”.
  • Page 98 <6. Operation> Upon the completion of the calibration time interval, you will see the message, “Span (or Zero) cal good” on the display. C A L I B R A T I O N T I M E Readout on the message display (Ex.) 0 5 .
  • Page 99 <6. Operation> D-0 Output range 1 You can set the range of oxygen concentration to correspond to the analog output signal (4 to 20 mA or 0 to 20 mA DC). You can set a free range from 0 to 25 vol% O .
  • Page 100 <6. Operation> O U T P U T H O L D Readout on the message display (Ex.) 0 : N 1 : H L D 2 : P - H L D When “2” is assigned O U T P U T H O L D ( 2 ) P R E S E T H O L D...
  • Page 101 <6. Operation> E-0 Setting of extreme high-limit/high-limit alarms You can set the level(s) of contact output signals for the extreme high-limit and/or high-limit alarms. If, for instance, you want to have an alarm set at an oxygen high-limit of 6.5 vol% O deactivate the extreme high-limit alarm, enter “000.0”...
  • Page 102 <6. Operation> Set the clock in this instrument to the present date and time. If the present date/time is April 26, 2006/6:45 pm for instance, enter “06/04/26 18:45” and press the “ENTER” key to activate the date and time. C L O C K E N T R Y Readout on the message display (Ex.)
  • Page 103 6-10 <6. Operation> R Y 1 C O N T . O U T P U T Readout on the message display (Ex.) 1 0 0 0 0 0 0 0 0 0 0 0 1 0 (Note 1) : 1 2 9 10 11 12 13 14 Digit No.
  • Page 104 6-11 <6. Operation> If the process gas error alarm is selected, move the cursor to “3” with the keys. If this error alarm is assigned, the power circuit supplying the detector with power from the converter is turned OFF when the contact signal is received. At the same time, the contact signal for driving the solenoid assembly is output.
  • Page 105 6-12 <6. Operation> H-1 Baud rate (data communication rate) assignment You assign here operating digital communications. For a data communication rate of 9600 bps or 4800 bps, enter “0” or “1”, respectively. For 2400 bps, select “2” from the keyboard. B A U D R A T E ( b p s )
  • Page 106 6-13 <6. Operation> J-3 Net calorific value You can set the net calorific value of the fuel used in the measurement process (in kJ/kg or kJ/ ). Look up the setting value from Table 6.2. If there are no relevant descriptions for your fuel, calculate the value using the formula shown on Pages 6-18.
  • Page 107 6-14 <6. Operation> Table 6.2 Various Values of Fuels ● Liquid fuels J - 2: Theoretical air qty J-4:X value Fuel Chemical components Heat value Combustion gas qty Specific Theoretical properties (% by weight) kJ/kg weight combustion value kg/l ω High Total Type...
  • Page 108 6-15 <6. Operation> <Calculation Formulae> If you use a fuel not described in Table 6.2, calculate the set values for Function Nos. J -1 to J - 4 using the following formulae: ● Liquid fuels Moisture content in exhaust gas = 1 /100 {1.24 (9 h + ω)} /kg] Theoretical air quantity= 12.38/10000 ×...
  • Page 109 6-16 <6. Operation> 0.046 0.044 0.042 0.040 0.038 0.036 0.034 0.032 0.030 0.028 Wet bulb Absolute temperature humidity (°C) 0.026 (kg/kg) 0.024 0.022 0.020 0.018 0.016 0.014 0.012 0.010 0.008 0.006 0.004 0.002 0.000 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 Dry bulb temperature (°C) F6.4E.ai...

  • Page 110: Set Of Relay Contacts For Contact Output

    6-17 <6. Operation> 6.1.7 Set of Relay Contacts for Contact Output CAUTION Never open the cover of the converter before turning off the power source. Contact status (Normally Open or Normally Closed) of the contact outputs selecting applications with function No. G-0, G-1 or G-2 is determined by the selected relay operation (normally energized or de-energized) and types of relay contact (”make”...

  • Page 111: Supplying Pressure To Ejector

    6-18 <6. Operation> Printed circuit board (PCB) Relay RL1 (Output signal #1) CN5 (for RL1) Relay RL2 (Output signal #2) CN6 (for RL2) Relay RL3 (Output signal #3) CN7 (for RL3) Break Make contact contact Setting jumper connector Mounting position of jumper (CN5, CN6, or CN7) connectors (CN5, CN6, or CN7) F6.5E.ai...

  • Page 112: Calibration

    6-19 <6. Operation> Furnace Pressure -196Pa -392Pa -588Pa -980Pa Supply Pressure (kPa) F6.7E.ai Figure 6.6 Supply Pressure to Suction Flowrate Characteristics in Auxiliary Ejector for Probe Adaptor 6.1.9 Calibration The calibration of this instrument is carried out by matching either the zero gas or the span gas, or either the oxygen concentration of the zero gas or of the span gas with the measured value of the relevant calibration gas.

  • Page 113: 6.1.10 Checking Functional Operations

    6-20 <6. Operation>  Preparation for calibration Check the set calibration data Adjust opening in the valve for calibration gas (automatic or semi-automatic calibration) Check calibration operation Execute calibration. <Checking the set calibration data> Sequentially display the data from Codes C-0 to C-7 on the message display of the converter and check for errors in the set data (e.g., the selected calibration method and the concentration of calibration gas).

  • Page 114: Checking Operating Conditions

    6-21 <6. Operation> Table 6.4 Error Codes, Details and Status Error code Error detail Error status E - - 1 Sensor (cell) error Goes into fail mode, automatically turning OFF the power supply to the detector heater. E - - 2 Sensor temp “LOW”...

  • Page 115: Stopping And Restarting Operations

    6-22 <6. Operation> 6.2.4 Stopping and Restarting Operations < Operation stoppage > Before stopping operations, it is important for you not to make the detector sensor inoperable. If you stop the operation of the zirconia oxygen analyzer at the same time as the boiler or furnace, etc., condensation forms in the sensor and dust adheres to it.

  • Page 116: Operating Keys And Display Of Converter

    <7. Operating Keys and Display of Converter> Operating Keys and Display of Converter In this Chapter, the operating keys on the operation panel of the converter and the indication on the display unit are described. Operating Keys HELP DISP ENTER F7.1E.ai 7.1.1 Types and Functions of Operating Keys...

  • Page 117: Examples Of Applications Of The Operating Keys

    <7. Operating Keys and Display of Converter> 7.1.2 Examples of Applications of the Operating Keys This section describes how to operate the keys with the following examples of operations. For displays, see 7.2. (1) Changeover from the measurement mode to the setting mode (2) Reply to inquiry (3) Entering the password (4) Selection of Function No.
  • Page 118 <7. Operating Keys and Display of Converter> ● Entering the password for setting (checking) temporary data Display of password - entering message P A S S W O R D (Two times) P A S S W O R D Cursor moves to “...
  • Page 119 <7. Operating Keys and Display of Converter> Entering the setting data (Selection of setting details) Use the number increase key, number decrease key, cursor key, entry key, etc. Which keys you use depend on the present state you are in (i.e., the operation mode and the position of the cursor).
  • Page 120 <7. Operating Keys and Display of Converter> Changing displayed data Use the number increase key to change the function number. Use the cursor key to change to another function group or to move to the next screen. ● When changing from Function No. A-0 Display of Function No.

  • Page 121: Readout Displays

    <7. Operating Keys and Display of Converter> Readout Displays There are 3 kinds of readouts: a status display, data display, and message display on the operation panel of the converter. In the status readout, the operation mode and the error alarm (if any) are displayed.
  • Page 122 <7. Operating Keys and Display of Converter> (8) Value-setting group H (Function Nos. H-0 - H-1) (9) Value-setting group J (Function Nos. J-0 - J-7) (10) Status message group (11) Interactive message group (12) Sub-message group Among other message groups, the value-setting group has already been described in 6.1.6. For the status, interactive and sub-message groups to be displayed automatically, the relevant descriptions will be given when required (e.g., “Calibration”...
  • Page 123 <7. Operating Keys and Display of Converter> ● Error Code “E--2” T E M P T O O L O – C A U S E ? Display when an error occurs (Example 2) I N C O R B R K N W R G C L D J C T C K T ,...
  • Page 124 <7. Operating Keys and Display of Converter> ● Error Code “E--6” C A L V A L A B N L – S P A N Display when an error occurs (Example 6) C A U S E ? C E L L D M G D C A L G A S F L R T...
  • Page 125 7-10 <7. Operating Keys and Display of Converter> The following equation can obtain the theoretical value of cell voltage E when the sensor is controlled at 750°C: E = -50.74 log (Px/Pa) [mV] Where Px: O concentration in the measurement gas Pa: O concentration in the comparison gas (21 vol% O Table 7.2 shows the relationship between the oxygen concentration and cell voltage.
  • Page 126 7-11 <7. Operating Keys and Display of Converter> l (mA) Range 0.1 to 5 0.1 to 10 0.1 to 25 0.1 to 100 l = 16×{(1/log (RangeH/0.1)} {log (Px/0.1)}+4 Px (vol% O F7.2E.ai A-6 Time The time is displayed by the clock function of the converter (year, month, day, hour, minute). If correction of this time is required, enter the correct time in Function No.
  • Page 127 7-12 <7. Operating Keys and Display of Converter> 81.92 Zero origin Calibration curve Cell voltage before correction Corrected (theoretical) calibration curve Span origin 21.0 0.51 (Span gas (zero gas concentration) concentration) Oxygen concentration (vol % O F7.3E.ai Zero point correction factor = (B/A) × 100 (%) Correctable range : 100±30% Span point correction factor = (C/A) ×...
  • Page 128 7-13 <7. Operating Keys and Display of Converter> Response time is calculated after the corrected calibration curve is obtained. With a starting point where a voltage corresponding to 10% of the corrected calibration curve span is found, the time that it takes for the voltage to reach the 90 % mark of a 100 % voltage corresponding to the oxygen concentration of a calibration gas (zero gas) set in the converter is calculated.
  • Page 129 7-14 <7. Operating Keys and Display of Converter> B-7 Dry O Concentration / Moisture Content When data corresponding to Function Nos. J-0 to J-7 are set, the captioned values are calculated based on the data while displaying the dry O concentration (vol% O ) and the moisture content (% H...

  • Page 130: Calibration

    <8. Calibration> Calibration In this Chapter, the method for calibrating a zirconia oxygen analyzer is described. General 8.1.1 Principles of Zirconia Oxygen Analyzer Before detailing calibration, the principles of measuring with a zirconia oxygen analyzer will be described. A solid electrolyte such as zirconia allows the conductivity of oxygen ions in a high-temperature state.

  • Page 131: Calibration Gas

    <8. Calibration> 0.51% O , 81.92 mV (Zero origin of calibration) Cell voltage (mV) 21.0% O , 0 mV (Span origin of calibration) 21.0 Oxygen concentration (vol%) O F8.1E.ai Figure 8.1 Oxygen Concentration in a Measurement Gas vs. Cell Voltage (21.0% O Equivalent) 8.1.2...

  • Page 132: Characteristic Data From A Sensor Measured During Calibration

    <8. Calibration> 81.92 Zero origin Cell voltage Corrected (mV) calibration curve Theoretical calibration curve Span origin 21.0 0.51 (zero gas (Span gas concentration) concentration) Oxygen concentration (vol% O Zero point correction factor = (B/A) × 100 (%) Correctable range : 100 ± 30% Span point correction factor = (C/A) ×...

  • Page 133: Calibration Procedures

    <8. Calibration> (4) Internal resistance of a cell Internal resistance gradually increases as the cell (sensor) deteriorates. You can monitor the value measured during the latest calibration using Function No. B-3. (5) Robustness of a cell The robustness of a cell is an index for predicting the remaining life of a sensor and is expressed in a number on 5 levels.

  • Page 134: Operation Flowchart

    <8. Calibration> 8.2.2 Operation Flowchart Mode changed to calibration. P l e a s e s e t (Note (Note 1) If 00.0 min. is set in C-4, this message is displayed, prohibiting calibration. “WARM-UP ON” is displayed while warming up. S p a n c a l Y / N ?
  • Page 135 <8. Calibration> Continued from the previous page HELP S p a n c a l g o o d S p a n v a l v e c l o s e ? To  P l e a s e c o n f i r m z e r o g a s = 0 1 .

  • Page 136: Methods Of Operating Valves In The Za8F Flow Setting Unit

    <8. Calibration> Methods of Operating Valves in the ZA8F Flow Setting Unit The ZA8F flow setting unit is used as a calibration device for a system conforming to Section 1.1.1 “Examples of System Configuration.” Calibration in such a system is to be operated as in a one-touch system.
  • Page 137 Blank Page...

  • Page 138: Inspection And Maintenance

    <9. Inspection and Maintenance> Inspection and Maintenance In this Chapter, inspection and maintenance for keeping or recovering the measuring performances of the EXA OXY Flameproof zirconia oxygen analyzer is described: WARNING • Before opening the cover of the ZS8C converter, remove power and make sure of non- hazardous (*) atmospheres.

  • Page 139: Calibration Of Indication

    <9. Inspection and Maintenance> (4) Other checks Pressure and flow rate of the flow setting unit When using the flow setting unit, check the supply pressure to it. Supply pressure: 67 kPa to 196 kPa Check the reference air flow and calibration gas flow to be supplied to the detector. (Especially, in automatic calibration) Reference air flow: 300 ±...

  • Page 140: Cleaning The Calibration Gas Tube

    <9. Inspection and Maintenance> Removal of the flame arrester block F There is a M5 thread hole at the center of the flame arrester block F. Screw any M5 bolt into this hole and pull it out by pulling the bolt toward you. As the OD 6 mm/ID 4 mm stainless steel pipe is provided for the block, draw this pipe out also.

  • Page 141: Replacing The Sensor Assembly

    <9. Inspection and Maintenance> To clean the tube, follow these steps: (1) Remove the detector from the installation assembly. (2) Following Section 9.1.7, later in this manual, remove the four bolts (and associated spring washers) that tighten the sensor assembly, and the pipe support as well as the U-shaped pipe.
  • Page 142 <9. Inspection and Maintenance> Sensor (cell) Filter Filter holder Probe Contact Washer Bolts O-ring U-shaped pipe F9.4E.ai Figure 9.2 Exploded View of Sensor Assembly Removal procedures (1) Remove the four bolts and associated washers from the tip of the detector probe. (2) Remove the U-shaped pipe support together with the U-shaped pipe.

  • Page 143: Cleaning The High-Temperature Probe Adapter

    <9. Inspection and Maintenance> (4) Coat the threads of the four bolts with antiseize grease and then screw them in along with the washers. First, tighten the four bolts uniformly by hand, and then use a torque wrench to tighten all areas of the metal O-ring uniformly, that is, to make sure the sensor flange is perfectly horizontal to the O-ring’s working face in the probe.

  • Page 144: Inspection And Maintenance Of The Converter

    <9. Inspection and Maintenance> Inspection and Maintenance of the Converter You need not inspect or perform maintenance work on the converter daily or periodically. If the converter fails to work properly, it might come from power failure or other causes in most cases. However, burned out fuses or ambiguous readouts on the message display after long-time use are sometimes caused by deterioration of the related parts.

  • Page 145: Replacing The Message Display Unit

    LCD. To replace the LCD, remove it together with the entire unit. If an error in your message display unit cannot be adjudged as to whether it is due to failure in the dot matrix LCD or a different cause, contact YOKOGAWA. IM 11M7A3-01E...

  • Page 146: Troubleshooting

    10-1 <10. Troubleshooting> Troubleshooting This chapter describes the checking and restoring methods when the ZS8C converter self- diagnosis function detected errors or other troubles occur. WARNING • Before opening the cover of the ZS8C converter, remove power and make sure of non- hazardous (*) atmospheres.

  • Page 147: Causes Of "E--1 Sensor (Cell) Failure" And Procedure For Restoration

    10-2 <10. Troubleshooting> Table 10.1 Error Codes, Their Contents and States When Each Error Occurs Error code Error contents State when the error occur E– –1 Sensor failure (cell) The analyzer goes to the fail mode and power to the detector heater is automatically turned off.

  • Page 148: Causes Of "E--2 Sensor Temperature Error (Low)" And Procedure For Restoration

    Inside of the converter or detector is suspected of failure. End. Set temporary data. Contact Yokogawa. F10.1E.ai 10.1.3 Causes of “E--2 Sensor Temperature Error (Low)” and Procedure for Restoration This error occurs when the sensor temperature after warm-up (in steady state operation) is lower than 720°C.

  • Page 149: Causes Of "E--3 Sensor Temperature Error (High)" And Procedure For Restoration

    (varies with ambient temperatures). by turning its power switch. The electronic circuit in the converter may Is the error displayed? possibly be failed. Contact Yokogawa. End. Set the temporary data. F10.2E.ai 10.1.4 Causes of “E--3 Sensor Temperature Error (High)” and Procedure for Restoration This error occurs when the converter detects that the sensor temperature is higher than 780°C.

  • Page 150: Causes Of "E--4 A/D (Analog Circuit) Failure" And Procedure For Restoration

    ● Temporarily operate the converter by turning its power switch. The electronic circuit in the converter may Is the error displayed? possibly be failed. Contact Yokogawa. End. Set the temporary data. F10.3E.ai 10.1.5 Causes of “E--4 A/D (Analog Circuit) Failure” and Procedure for Restoration This error occurs when the electric circuit of the converter does not operate normally.

  • Page 151: Causes Of "E--5 Calibration Value Error (Zero)" And Procedure For Restoration

    In this case, it is not so easy to find the failed part and to restore. If the error occurs again, contact Yokogawa. Confirm that power system is not in failure by checking the supply voltage and others to make sure of it.

  • Page 152: Causes Of "E--7 Emf Stabilization Time Over" And Procedure For Restoration

    10-7 <10. Troubleshooting> This error occurs when the span point correction factor (see Subsection 8.1.3) exceeds the range 0 ± 18% in the automatic and semi-automatic calibrations. < Causes > (1) The oxygen concentration of span gas and the value set with function No. C-0 do not agree or the zero gas is accidentally used as the span gas.

  • Page 153: Causes Of "E--8 Rom And Ram Failure" And Procedure For Restoration

    Turn off the power to the converter. Check that the supply voltage is the rated voltage. Then turn on the power. Check that the converter is operating normally. If the error also occurs, repair is necessary. Contact Yokogawa. 10.1.10 Causes of Display Disappearance (Data Display) and Procedure for...

  • Page 154: Where The Output Response Is Too Slow

    10-9 <10. Troubleshooting> 10.2 Where the Output Response Is Too Slow If the suction flowrate of a sample gas decreases, check to see that the detector’s main ejector is not clogged. When the probe adaptor is used, also check that the auxiliary ejector is not clogged. 10.2.1 Checking the Main Ejector for Clogging (1) Remove the main ejector from the detector.
  • Page 155 10-10 <10. Troubleshooting> 2. For high-temperature detectors with probe adaptors Even though the furnace internal pressure is negative, the suction pressure of the probe adaptor-side ejector (hereinafter referred to as auxiliary ejector) is higher than that pressure which is set. Or a higher suction pressure of the detector-side ejector (hereinafter referred to as a main ejector) than the furnace internal pressure is set.

  • Page 156: Measured Value Lower Than True Value

    10-11 <10. Troubleshooting> 10.3.2 Measured Value Lower Than True Value < Causes and Measures > (1) The measuring gas pressure becomes lower. Where an increment of the measured value by pressure change cannot be neglected, take measures referring to Subsection 9.1.1 (1). (2) Moisture content in a reference gas changes (decrease) greatly.
  • Page 157 Blank Page...

  • Page 158: Customer Maintenance Parts List

    K9292BB Flame Arrestor Calibration gas. Reference air Inlet. 1/4NPT K9292BU Flame Arrestor Reference air outlet Rc1/4 K9292BY Flame Arrestor Reference air outlet 1/4NPT CMPL 11M7A3-01E All Rights Reserved, Copyright © 1995, Yokogawa Electric Corporation. 3rd Edition : Apr. 2001 (YK)
  • Page 160 Customer ZS8C Flameproof Maintenance Zirconia Oxygen Analyzer Parts List Converter Item Parts No. Description 　　　 K9291XA Packing Y9635ZU Bolt M12x35 SUS CMPL 11M7A3-03E All Rights Reserved, Copyright © 1995, Yokogawa Electric Corporation. 4th Edition : Jan. 2011 (YK)
  • Page 161 CPU Assembly (for ZS8C-J-3(or 4)-    K9291YA Controller (ZS8C-J- only)     K9291YD Noise Filter (ZS8C-J-3(or 4)- only)     CMPL 11M7A3-03E All Rights Reserved, Copyright © 1995, Yokogawa Electric Corporation. 4th Edition : Jan. 2011 (YK)
  • Page 162 K9291FA Bracket (wall mounting only) Y9814NU Screw K9291FE Flame Arrestor Assembly Rc1/4 K9291FF Flame Arrestor Assembly 1/4NPT G9601AE Cable Gland Assembly G9330DQ Plug CMPL 11M7A3-03E 4th Edition : Jan. 2011 (YK) All Rights Reserved, Copyright © 1995, Yokogawa Electric Corporation.

  • Page 164: Customer Maintenance Parts List

    Sub Ejector (Rc1/4) K9292WB Sub Ejector (1/4NPT) E7046FQ Gasket E7046FN Plate Y9825NU Screw Y9800WU Washer Y9801BU K9292DL Gasket CMPL 11M7A3-04E All Rights Reserved, Copyright © 1995, Yokogawa Electric Corporation. Subject to change without notice. 4th Edition : Oct. 2010 (YK)

  • Page 166: Customer Maintenance Parts List

    Ejector Assembly, Connection 1/4NPT For Detector Use K9292WC Ejector Assembly, Connection Rc1/4 For Probe Adaptor Use K9292WD Ejector Assembly, Connection 1/4NPT For Probe Adaptor Use CMPL 11M7A3-11E All Rights Reserved, Copyright © 1995, Yokogawa Electric Corporation. 2nd Edition : Apr. 2001 (YK)

  • Page 168: Revision Record

    Sep. 2010/3rd Edition IM style & Format renewed Revised and Corrected all over (“After-Sales Warranty” added, etc.) Mar. 1997/2nd Edition Some error corrected Apr. 1996/1st Edition Newly published. Yokogawa Electric Corporation 2-9-32 Nakacho, Musashino-shi, Tokyo 180-8750, JAPAN http://www.yokogawa.com/ IM 11M7A3-01E...
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