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Metek 920 Operator's Manual With Essential Health And Safety Requirements

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Model 920 Multi-Gas Analyzer
Operator's Guide
With Essential Health and Safety Requirements
Canada
A DIVISION OF AMETEK PROCESS & ANALYTICAL INSTRUMENTS
Western Research
PN 903-8765, Rev. E

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  • Page 1 Model 920 Multi-Gas Analyzer Operator’s Guide With Essential Health and Safety Requirements Canada A DIVISION OF AMETEK PROCESS & ANALYTICAL INSTRUMENTS Western Research PN 903-8765, Rev. E...

  • Page 2: Offices

    Printed in Canada This manual is a guide for the use of the Model 920 Multi-Gas Analyzer. Data herein has been verified and validated and is believed adequate for the intended use of this instrument. If the instrument or procedures are used for purposes over and above the capabilities specified herein, confirmation of their validity and suitability should be obtained;...

  • Page 3: Table Of Contents

    Contents Offices ..........................ii Safety Notes ........................ix Electrical Safety ........................ix Grounding .......................... ix Personnel and Equipment Safety Information .............. x Warnings ........................x Cautions ........................xii Warning Labels ........................ xiii Environmental Information ..................xiii UV Source Lamps Disposal ................... xiii Electromagnetic Compatibility (EMC) .................
  • Page 4 Systems with 100 psia Pressure Transducer (Maximum 350 kPag Sample Gas Pressure) ..................2-18 Heater Plate ATEX and IECEx Certificates and Marking ........ 2-19 Disconnect Enclosure Type 200 ATEX and IECEx Certificates and Marking . 2-26 iv | Model 920 Multi-Gas Analyzer...
  • Page 5 CHAPTER 3 INSTALLATION AND START-UP ..............3-1 Safety Considerations ..................... 3-2 Pre-Installation Requirements..................3-2 Storage Prior to Installation ..................3-2 Uncrating and Inspecting the Analyzer ..............3-3 Tools and Equipment Required ................3-4 Installing the Mechanical Components ............... 3-5 Installing the Analyzer ..................... 3-5 Location and Environment ..................
  • Page 6 Solenoid Valve Control ..................4-53 Calculated Result Name ................4-54 SSR Output Assignment .................. 4-55 Auto-Zero/Auto-Span .................... 4-58 Manual Start of Auto-Zero ................4-60 Timed Start of Auto-Zero .................. 4-60 Manual Start of Auto-Span................4-61 vi | Model 920 Multi-Gas Analyzer...
  • Page 7 Auto-Calibration ..................... 4-62 Timed Start of Auto-Calibration ............... 4-62 Manual Start of Auto-Calibration ..............4-63 Remote Start of Auto-Calibration ..............4-64 Analog Output Calibration ................... 4-66 Probe Blow-Back Control (Optional) ..............4-68 CHAPTER 5 MAINTENANCE AND TROUBLESHOOTING..........5-1 Safety Considerations ..................... 5-1 Preventive Maintenance ....................
  • Page 8 RS-232/RS-485 Module Wiring, CE/Zone 1 & GP/Div 2 Analyzers (100-2185) ... A-13 Microcontroller Board (100-0117) ................A-14 Host Controller Board (Display Interface) (100-0138) ..........A-15 Model 9xx-Series Analyzer Type 200 Disconnect Enclosure Details ....A-16 SUPPLEMENTAL INFORMATION ..................S-1 viii | Model 920 Multi-Gas Analyzer...

  • Page 9: Safety Notes

    Safety Notes WARNINGS, CAUTIONS, and NOTES contained in this manual emphasize critical instructions as follows: An operating procedure which, if not strictly observed, may result in personal injury or envi- ronmental contamination. Essential Health and Safety Requirements are also included in WARNING –...

  • Page 10: Personnel And Equipment Safety Information

    Follow appropriate regulatory and/or company procedures to lock out the analyzer while work- ing on its electronics. WARNING Before working on the sample system, confirm that the system is purged with Zero gas and is isolated (blocked in) from the sample stream. WARNING x | Model 920 Multi-Gas Analyzer...
  • Page 11 Because ultraviolet radiation can harm your eyes, avoid direct viewing of the light emanating through the end window of the source lamp. If the source lamp must be viewed while ener- WARNING gized, wear safety glasses that block ultraviolet radiation. The Analyzer Oven enclosure and components within the Analyzer Oven are hot;...

  • Page 12: Cautions

    For Division 2/Zone 2 Installations that do not use the Disconnect Enclosure, use a suitable cable entry device with a sealing ring that meets the local requirements for entries into pres- surized enclosures. xii | Model 920 Multi-Gas Analyzer...

  • Page 13: Warning Labels

    Warning Labels These symbols may appear on the instrument in order to alert you of existing conditions. Protective Conductor Terminal (BORNIER DE L’ECRAN DE PROTECTION) Schutzerde Caution – Risk of electric shock (ATTENTION – RISQUE DE DÉCHARGE ÉLECTRIQUE) Achtung – Hochspannung Lebensgefahr Caution –...

  • Page 14: Electromagnetic Compatibility (Emc)

    CAUTION The various configurations of the Model 920 Multi-Gas Analyzer should not produce, or fall victim to, electromagnetic disturbances as specified in the European Union’s EMC Directive (if applicable to your application).

  • Page 15: Special Warnings And Information

    Special Warnings and Information Equipment Used in Haza rdous Locations Refer to Chapter 2 – Specifications for details about the suitability of this equipment in hazard- ous locations. This analyzer must not be commissioned until a person trained in the area of evaluating equipment for use in hazardous classified locations has confirmed that this equip- ment and its installation are in compliance with the requirements for the area.

  • Page 16: Eu Declaration Of Conformity

    Laboratory Use – Part 1. General requirements. Pressure Equipment Directive 2014/68/EU Article 4, Paragraph 3 Canada A DIVISION OF AMETEK PROCESS & ANALYTICAL INSTRUMENTS Western Research Page 1 of 2 PN 903-8594 Rev M xvi | Model 920 Multi-Gas Analyzer...
  • Page 17 EU Declaration of Conformity The object of the declaration described [herein] is in conformity with the relevant Union harmonization legislation (Directive 2014/34/EU): EN 60079-0:2012+A11:2013 General requirements EN 60079-1:2014 Equipment protection by flameproof enclosures ‘d’ EN 60079-2:2014 Equipment protection by pressurized enclosures ‘p’ EN 60079-7:2015+A1:2018 Equipment protection by increased safety ‘e’ EN 60079-11:2012 Equipment protection by intrinsic safety ‘i’ Certificate Number: KEMA 02ATEX2341 X (Model 9XX Purged Analyzers) KEMA 02ATEX2255 X (900 Series Heater Plate) KEMA 01ATEX2219 X (Disconnect Enclosure Type 200) Notified Body: DEKRA Certification B.V. 0344...

  • Page 18: Warranty And Claims

    OR IN CONJUNCTION WITH EQUIPMENT OF OUR MANUFACTURE. WE DO NOT AUTHORIZE ANY US ANY LIABILITY IN CONNECTION WITH REPRESENTATIVE OR OTHER PERSON TO ASSUME FOR EQUIPMENT, OR ANY PART THEREOF, COVERED BY THIS WARRANTY. xviii | Model 920 Multi-Gas Analyzer...

  • Page 19: Chapter 1 Overview

    OVERVIEW This chapter provides an overview of the various sub-systems that make up the AMETEK analyzer and its sample system, and where to find supplemental information for optional equipment. Overview | 1-1...

  • Page 20: About The Analyzer

    • Beam Splitter • Front-surfaced mirrors • Gas Measuring Cell (contained within an Oven). A pressure transduc- er monitors the pressure at the outlet of the Measuring Cell. • Two matched Photodetectors Figure 1-1. Analyzer schematic. 1-2 | Model 920 Multi-Gas Analyzer...

  • Page 21: Sample Flow

    Sample Flow The sample gas is drawn from the extraction point through the Sample Probe and Sample Line (or from a stack via a SCU) to the dual-chambered Measuring Cell. The gas sample enters the first chamber, flows the length of the Measuring Cell, crosses to the second chamber, flows the length of the Measuring Cell in the opposite direction and exits the Measuring Cell.
  • Page 22 Used for pressure checking the analyzer sample system. Aspirator Pressure Gauge Provides indication of Aspirator Air pressure and sample flow rate. Provides indication of process pressure when Aspirator Air is shut off. Aspirator/Backpurge Rotameter Adjusts the aspirator air flow rate. 1-4 | Model 920 Multi-Gas Analyzer...
  • Page 23 Component Function Aspiration Components (continued) Flow Control Solenoid Allows Aspirator Air to be turned off and on automatically if the analyzer is not ready to obtain a sample. This solenoid must be energized for the analyzer to obtain a sample of gas. Aspirator Tubing Connection This tube, usually 1/4"...
  • Page 24 Figure 1-2. Piping & Instrumentation diagram (CE/Zone 1).  Figure 1-2 is an example drawing only. Refer to Final “As-Built” draw- ings for your system in the analyzer Documentation Package. NOTE 1-6 | Model 920 Multi-Gas Analyzer...
  • Page 25 Figure 1-3. Oven/Instrumentation layout, CE/Zone 1.  Figure 1-3 illustrates a typical Oven/Instrumentation layout for CE/ Zone 1 analyzers. For your system, refer to Final “As Built” drawings NOTE in the analyzer Documentation Package. Overview | 1-7...

  • Page 26: Temperature Control System

    RTD embedded in the Heater Plate. The RTD makes contact with the Measuring Cell mount. The default and recommended temperature Set Point for the Measuring Cell is set at 150 °C but can be modified through the keypad. 1-8 | Model 920 Multi-Gas Analyzer...

  • Page 27: Working In This Manual

    Working in This Manual While working in this manual, icons in the outside page margins represent various kinds of information that serve as reminders or extra information about the topic, or navigation information when working from the User Interface. Descriptions of User Interface menus, terms, characters, parameters, and commands can be found in Chapter 4 –...

  • Page 28: Supplemental Information - Where Can I Find It

    An “Operator Interface Quick Reference Sheet,” which lists all of the Function commands used to access analyzer parameters and other NOTE information from the User Interface is shipped on the inside of the analyzer’s Electronics Enclosure door. 1-10 | Model 920 Multi-Gas Analyzer...

  • Page 29: Methodology

    SPECIFICATIONS The standard customer range is defined as full-scale ranges that fall within the minimum and maximum allowable for a given Measuring Cell. Calculations of minimum and maximum are based on atmospheric pressure. Methodology Multiple Wavelength, high resolution, non-dispersive ultraviolet. (Optional O Sensor: Zirconium Oxide cell –...

  • Page 30: Response Time

    < 0.2 % of full-scale of standard ranges. Cross-Talk < 1.0 % NO full-scale on to SO < 1.0 % SO full-scale on to NO Cross-talk adjustments should be made by factory-trained service personnel only. CAUTION 2-2 | Model 920 Multi-Gas Analyzer...

  • Page 31: Temperature Drift

    Temperature Drift (40 PPM/Cell length)/°C NO & NO (120 PPM/Cell length)/°C (80 PPM/Cell length)/°C S @ 228 nm (80 PPM/Cell length)/°C S @ 214 nm (30 PPM/Cell length)/°C (40 PPM/Cell length)/°C  Use above specifications OR 3* (Customer full-scale/Maximum full- scale), whichever is greater.

  • Page 32: Maximum Sample Gas Pressure

    Each relay provides a set of SPDT (Form C) dry (potential free) contacts. The relays are configured for fail-safe operation (i.e., energized for the non-alarm condition). Sample Gas Flow Rate 3.0–5.0 L/minute (0.1–0.2 SCFM) 2-4 | Model 920 Multi-Gas Analyzer...

  • Page 33: Ambient Limits

    Ambient Limits Temperature 5 °C–50 °C (41 °F–122 °F) Humidity 0–95 % RH  Temperature drift is approximately 1 PPM/° C for the species listed. To achieve maximum accuracy and stability, install the analyzer in NOTE a temperature-controlled environment or zero the analyzer more frequently.

  • Page 34: O 2 Concentration Signal (Optional)

    (excluding drift and temperature effects). Repeatability < ± 0.5 % full-scale of standard ranges. 24-Hour Zero Drift 1.0 % O (with Auto-Zero disabled). Temperature Drift 0.0223 % O per °C Electrical Classification General Purpose applications/analyzers only. 2-6 | Model 920 Multi-Gas Analyzer...

  • Page 35: So 2 Concentration Signal (Optional)

    Concentration Signal (Optional) Full-Scale Maximum 1000 PPM maximum for applications measuring SO and NO 2 mole percent maximum on SO -only applications. Cross Interference 0.0 PPM SO / PPM NO < ±0.01 PPM SO / PPM NO Linearity Deviation over full-scale measuring ranges: < ±10 PPM. Reproducibility <...

  • Page 36: X Concentration Signals

    Typically a 30-second response to 90 % of change. Zero Stability Noise: ±1 PPM NO with recommended 30-second filter- ing time constant. Drift: < ±10 PPM NO / day with Auto-Zero disabled and excluding ambient temperature effects. 2-8 | Model 920 Multi-Gas Analyzer...

  • Page 37: Cable Entry Ports, Type 200 Disconnect Enclosure

    Ex d plug. Approvals and Certifications The Model 920 Analyzer is certified for indoor use only, Installation Category II (local level transients, less than those found at power distri- bution level), and Pollution Degree 2 (normally nonconductive environ- mental pollution occurs with occasional condensation).

  • Page 38: Atex And Iecex Certificates And Analyzer Markings

    For installation sites with potentially explosive atmospheres that require ATEX and IECEx certification, AMETEK’s ATEX and IECEx certificates for the Model 920 Analyzer (and their markings) are included in the follow- ing pages. Purged Analyzer ATEX and IECEx Certificates and Markings...
  • Page 39 Specifications | 2-11...
  • Page 40 2-12 | Model 920 Multi-Gas Analyzer...
  • Page 41 2019-02-05 Specifications | 2-13...
  • Page 42 2-14 | Model 920 Multi-Gas Analyzer...
  • Page 43 Specifications | 2-15...
  • Page 44 2-16 | Model 920 Multi-Gas Analyzer...
  • Page 45 Specifications | 2-17...

  • Page 46: Systems With 30 Psia Pressure Transducer (Maximum 63 Kpag Sample Gas Pressure)

    ATEX- and IECEx-certified Model 920 Purged Analyzers are marked with one of the labels shown below (depends on application). Systems with 30 psia Pressure Transducer (Maximum 63 kPag Sample Gas Pressure) 0344 II 2 G AMETEK CANADA LP Western Research Series 9XX Analyzer Power Dissipation <...

  • Page 47: Heater Plate Atex And Iecex Certificates And Marking

    Heater Plate ATEX and IECEx Certificates and Marking Specifications | 2-19...
  • Page 48 2-20 | Model 920 Multi-Gas Analyzer...
  • Page 49 Specifications | 2-21...
  • Page 50 2-22 | Model 920 Multi-Gas Analyzer...
  • Page 51 Specifications | 2-23...
  • Page 52 2-24 | Model 920 Multi-Gas Analyzer...
  • Page 53 ATEX- and IECEx-certified Model 920 Analyzers are marked with this label: Specifications | 2-25...

  • Page 54: Disconnect Enclosure Type 200 Atex And Iecex Certificates And Marking

    Disconnect Enclosure Type 200 ATEX and IECEx Certificates and Marking 2-26 | Model 920 Multi-Gas Analyzer...
  • Page 55 Specifications | 2-27...
  • Page 56 2-28 | Model 920 Multi-Gas Analyzer...
  • Page 57 Specifications | 2-29...
  • Page 58 2-30 | Model 920 Multi-Gas Analyzer...
  • Page 59 Specifications | 2-31...
  • Page 60 ATEX- and IECEx-certified Model 920 Analyzers are marked with this label: 2-32 | Model 920 Multi-Gas Analyzer...

  • Page 61: Chapter 3 Installation And Start-Up

    INSTALLATION and START-UP This chapter describes how to install and start up the analyzer, including: • Safety considerations before working on the analyzer. • Uncrating, inspecting, and storing the analyzer prior to installation. • Installing the mechanical components and making the electrical connections.

  • Page 62: Safety Considerations

    Recommended storage conditions include: Temperature: 0 °C to 50 °C (32 °F to 122 °F) Relative Humidity: < 70 % Failure to comply with these storage conditions will void your warranty. 3-2 | Model 920 Multi-Gas Analyzer...

  • Page 63: Uncrating And Inspecting The Analyzer

    Uncrating and Inspecting the Analyzer The analyzer and its associated sample system is shipped pre-mounted on a backpan, either alone in a crate or in a crated weatherproof shelter. Upon receiving the analyzer system, remove the shipping crates and check the exterior of the shelter and/or analyzer for damage. Open the shelter and verify its internal components are secure and there is no phys- ical damage.

  • Page 64: Tools And Equipment Required

    (breaker) must be connected to and mounted near the analyzer, in an easily accessible area. The switch (breaker) must be clearly la- beled (e.g., “AMETEK Model 920 Analyzer Main AC Power Disconnect Switch”). For safety reasons during maintenance, this switch allows the main AC power to be disconnected from the analyzer prior to performing service on the analyzer.

  • Page 65: Installing The Mechanical Components

    Installing the Mechanical Components Install the analyzer in its designated location before installing the Optical Bench in the Electronics Enclosure. CAUTION Installing the Analyzer The analyzer system comes mounted on a backpan. See Figure 3-1 for the backpan and mounting hole locations and dimensions, plus necessary clearances on all sides that are required for service.
  • Page 66 For other analyzer configurations, refer to Final “As-Built” drawings in the analyzer Documentation Package. Figure 3-1. Analyzer backpan mounting details (CE/Zone 1). 3-6 | Model 920 Multi-Gas Analyzer...

  • Page 67: Installing The Optical Bench Assembly

    Installing the Optical Bench Assembly The Optical Bench Assembly – shipped in a separate box – must be in- stalled in the analyzer’s Electronics Enclosure after the analyzer has been installed. All electrical connections to the Optical Bench are made via pre-wired connector plugs.
  • Page 68 Figure 3-2. Electronics enclosure, typical analyzer backpan layout.  Figure 3-2 illustrates a typical analyzer layout. For your specific analyzer, refer to Final “As-Built” drawings shipped with the analyzer. NOTE 3-8 | Model 920 Multi-Gas Analyzer...
  • Page 69 3. Connect Optical Bench wiring: a. Ribbon cable from J102 on Micro-Interface board to J100 on Optical Bench board. b. AC power line (connector plug) to TB100 on Optical Bench board. c. Using the disconnect terminals, connect the yellow/green ground wire from the Electronics Enclosure to the yellow/green ground wire from the Optical Bench.
  • Page 70 5. Connect the Sample and Vent Line tubes to their fittings on the Measuring Cell. 6. Optional: If using the Optical Bench Purge, connect the purge line (black tube) to the Purge Fitting on the Optical Bench. 3-10 | Model 920 Multi-Gas Analyzer...
  • Page 71 Figure 3-4. Optical Bench/ Measuring Cell assembly. Installation and Start-Up | 3-11...

  • Page 72: Installing The Sample System

    HAG Sample Probe “Installation and Maintenance Guide” for complete installation information. If possible, install the Sample Probe Valve approximately 8–10 pipe di- ameters away from any process piping component that causes process turbulence, such as bends, valves, etc. 3-12 | Model 920 Multi-Gas Analyzer...

  • Page 73: Installing The Sample And Vent Lines

    Installing the Sample and Vent Lines The Sample and Vent Lines can be supplied by AMETEK or the cus- tomer. This section assumes both the Sample and Vent Lines are used (by AMETEK). An alternate Vent Line installation is also available for applica- tions that vent the used sample gas to atmosphere.
  • Page 74 Analyzer Oven. Connect it to the Sample Outlet fitting. Do not add extra insulation to the Sample Line or Vent Line. This will result in a local hot spot and cause premature failure of the line. CAUTION 3-14 | Model 920 Multi-Gas Analyzer...
  • Page 75 5. Connect the Sample Line to the Sample Probe or SCU. Connect the Vent Line to the Vent Valve Assembly on the process duct. If using a Vent Pipe, connect it to the fitting on the stack (to atmosphere).  If using a Sample Probe Valve and Vent Valve, do not insulate the valves until after the Steam Inlet/Exhaust Lines have been installed NOTE...
  • Page 76 Figure 3-5 illustrates a typical Oven/Instrumentation layout for CE/ Zone 1 analyzers. Figure 3-6.1 is for Zone 1 analyzers, while Figure NOTE 3-6.2 is for GP/Div 2 analyzers. For your system, refer to Final “As Built” drawings in the analyzer Documentation Package. 3-16 | Model 920 Multi-Gas Analyzer...
  • Page 77 Figure 3-6.1. Sample/Vent Line Wiring, Disconnect Enclosure (Zone 1). Installation and Start-Up | 3-17...
  • Page 78 Figure 3-6.2. Sample/Vent Line Wiring, GP/Div 2 Analyzer. 3-18 | Model 920 Multi-Gas Analyzer...

  • Page 79: Installing The Steam Lines (If Used)

    Installing the Steam Lines (if Used)  This section applies only to applications using steam-heated valves. NOTE For details about steam supply requirements, refer to the “Block Diagram” and “Piping & Instrumentation Diagram” in the analyzer Documentation Package. The Steam Inlet/Exhaust tubing (by customer) transports steam which heats the sample gas at the extraction point.

  • Page 80: Installing Insulation Around The Valve Assemblies

    (and there are no leaks), install the Heat Transfer Block on the Sample Probe Valve. Install one Insulating Flex Pack (supplied by AMETEK) on each valve assembly. If necessary, install additional insula- tion (supplied by customer) around each valve. 3-20 | Model 920 Multi-Gas Analyzer...

  • Page 81: Installing The Instrument Air Line

    Installing the Instrument Air Line The Instrument Air line (by customer) must be 1/4" or 3/8" 316 stainless steel tubing with appropriate 1/4" NPT or 3/8"-to-1/4" NPT (reducing) connectors. The Instrument Air must meet the ANSI/ISA-S7.0.01 (1996) specifications at all times. If it cannot meet these requirements, an inlet filter system must be installed.

  • Page 82: Installing The Span/Zero Gas Lines

    2. Purge the lines to remove any liquids or particulate that may be pres- ent in them before connecting them to the analyzer. 3. Connect the appropriate line to its corresponding fitting on the Manifold block and to the supply tanks. 3-22 | Model 920 Multi-Gas Analyzer...

  • Page 83: Connecting I/O Signals, Alarm Relay Contacts, And Ac Power

    Connecting I/O Signals, Alarm Relay Contacts, and AC Power The analog input/output signals, alarm relay contacts, and AC power requirements are specific to each analyzer installation. Purged Analyzer (Hazardous Location) Applications M25 x 1.5, 6H cable entries are provided for Power (1 entry) and CAUTION Signals (2 entries).
  • Page 84 (breaker) must be connected to and mounted near the analyzer, in an easily accessible area. The switch (breaker) must be clearly la- beled (e.g., “AMETEK Model 920 Analyzer Main AC Power Discon- nect Switch”). For safety reasons during maintenance, this switch allows the main AC power to be disconnected from the analyzer prior to performing service on the analyzer.
  • Page 85 To make the signal, relay contact, and power connections: 1. General Purpose (GP) Analyzers: Open the Electronics Enclosure and open all of the fuses. Purged Analyzers (Hazardous Locations): Open the Electronics Enclosure and open all of the fuses. Open the explosion-proof power-disconnect switch.
  • Page 86 5. Purged Analyzers only: Using a wire connector, connect an external ground wire between the “Enclosure Common Ground Terminal Strip” on the analyzer backpan (see Figure 3-9) and a location close to the analyzer. 3-26 | Model 920 Multi-Gas Analyzer...
  • Page 87 6. Before closing the Disconnect Enclosure door, use a soft, nonabrasive cloth to gently clean its joining surfaces (flamepath) and make sure they are free of debris. After cleaning these surfaces, inspect the flame- path for scratches or other damage. If no damage is evident, apply a suitable thread lubricant (must not contain copper) to the threads of the (24) screws that secure the door to the Disconnect Enclosure.
  • Page 88 24 V DC Power Supply Not Used Isolation Velocimeter Solenoid 1 Not Used Blow Back Velocimeter Solenoid 2 Figure 3-8. AC Wiring, GP/Div 2/ CE/Zone 1 Analyzer. AC WIRING 909/910/919/920 PD, CE & ZONE 1 ANALYZERS 3-28 | Model 920 Multi-Gas Analyzer...

  • Page 89: Start-Up And Verification

    Start-Up and Verification This section describes equipment and controls on the analyzer system that require adjustments and settings before, during, and after power-up.  Figure 3-9 illustrates the locations of analyzer equipment and con- trols that require adjustments for a typical Zone 1 analyzer layout. NOTE Refer to Final “As Built”...

  • Page 90: Purged Analyzers

    “BYPASS” position (and appropriate safety conditions must have been met, as per company policy). For normal analyzer operation, the Purge Bypass Switch must be in the “ACTIVE” position and the key must be removed (follow company policy). 3-30 | Model 920 Multi-Gas Analyzer...
  • Page 91 Figure 3-10. Purge Bypass Switch label. To ensure safe operating conditions, the analyzer will not power up until the MiniPurge system has been connected to the instrument air sup- ® ply (ALARM/PRESSURIZED indicator is GREEN) and has successfully completed its purge timing cycle (the PURGE TIMING/STATUS LEDs are now off) and the enclosure is pressurized.

  • Page 92: Powering Up The Analyzer

    To power up the analyzer and verify it is operating properly: 1. With the Electronics Enclosure open: GP Analyzers:  Close the Analyzer fuse to apply AC power to the analyzer. See Fuse Legend inside Electronics Enclosure door. 3-32 | Model 920 Multi-Gas Analyzer...
  • Page 93 Purged Analyzers (Hazardous Locations): Insert the key into the Purge Bypass Switch and switch it to the “BYPASS” position (follow company policy). [Special Conditions for Safe Use] The analyzer may only be energized by using the Purge Bypass WARNING Switch with permission of the works manager or his proxy. The per- mission may only be given when it is made sure that during the time the system is energized by using this switch an explosive atmosphere is not present or when the necessary protective measures against...
  • Page 94 TZone 3 (Spare) or HAG Probe, if used Cell/Oven Line  The third temperature zone (“3” = TZone3) is a spare and is used only when an optional heated sample probe is used. NOTE 3-34 | Model 920 Multi-Gas Analyzer...
  • Page 95 b. Check and record the current temperature readings. This will help you determine if the signal wiring is properly terminated and if all of the circuitry is operating properly. To do this, view the MAI screen (Microcontroller Board Analog  Inputs) and press keys 1..8 to view the inputs.
  • Page 96 See “Manually Zeroing the Analyzer” in this chapter. 12. Adjust the Aspirator Drive Air Regulator to achieve normal operating  flow rates. See “Setting the Sample Gas Flow Rate and Sample Response Time” in this chapter. 3-36 | Model 920 Multi-Gas Analyzer...

  • Page 97: Start-Up Diagnostic Checklist

    Start-Up Diagnostic Checklist This checklist describes problems that may be encountered while power- ing up the analyzer and preparing it for normal operation. If the analyzer experiences problems during power-up, review this checklist and perform the corresponding corrective action to fix any problems. Problem Encountered “Reset in Progress”...
  • Page 98 RTD for the related temperature zone. Corrective Action Take appropriate safety precautions and check the RTD for a short or an open circuit. If necessary, replace the RTD with an AMETEK-approved replacement part. Contact AMETEK for assistance. 3-38 | Model 920 Multi-Gas Analyzer...
  • Page 99 Figure 3-11. Over-Temp alarm reset switch (SW300), Termination board. Installation and Start-Up | 3-39...

  • Page 100: Sample System Leak Check

    105 KPAG (15 PSIG). CAUTION 4. View the CellP (Measuring Cell Pressure) screen and record the nu-  meric value displayed. This value is the absolute pressure reading in (CellP) RUNF6 8 6 mmHg (or "Hg). 3-40 | Model 920 Multi-Gas Analyzer...
  • Page 101 5. Block in the instrument air by closing the Drive Air Isolation Valve and observe the pressure reading. Allow the pressure within the sample system and Measuring Cell to equilibrate (approximately 5 minutes) before taking the initial reading. Meanwhile, continue to observe the CellP reading.

  • Page 102: Manually Zeroing The Analyzer

    Run the Manual Zero for 10 minutes at a flow rate of 2.5 L/min (0.08 SCFM). See “Setting the Zero Gas Flow Rate” in this chapter. If the User Interface displays a “w ZDrift/SpnErr” alarm message, restart the Manual Zero (enter F2 0 Ent). 3-42 | Model 920 Multi-Gas Analyzer...

  • Page 103: Setting The Zero Gas Flow Rate

    4. Record the analyzer’s initial Measure and Reference PMT signal read- ings. See “Recording Initial Readings” in this chapter. 5. Change the Flow Control mode back to “0” (Analyzer Control).  (FlowCtrl) CALF5 2 6. Return to RUN mode. Del 0 Ent Ent 7.

  • Page 104: Setting The Sample Gas Flow Rate And Sample Response Time

    Aspirator Air to the appropriate pressure in the range of 7–35 KPAG (1–5 PSIG). To avoid damaging the pressure transducer, do not set the pressure higher than 105 KPAG (15 PSIG). CAUTION  The sample response time may vary, depending on Sample Line length. NOTE 3-44 | Model 920 Multi-Gas Analyzer...

  • Page 105: Normal Operation

    Normal Operation After the analyzer has been set up and started, the User Interface defaults to RUN mode. During normal operation in RUN mode, the top line dis- plays the output parameter names, while their corresponding values are displayed on the bottom line. ...

  • Page 106: Recording Initial Sample Response Time

    Flow Control mode from “1” to “0” is approximate- ly 30 seconds), no further adjustment is necessary.  The sample response time may vary, depending on Sample Line length. NOTE 4. Record these signals in a log book every month. 3-46 | Model 920 Multi-Gas Analyzer...

  • Page 107: Analyzer Configuration

    Analyzer Configuration EEPROM Data Sheets and Analyzer Programming Parameters, which list the factory-default configuration settings of all programmable parameters, are located in the analyzer Documentation Package. If any changes are made to the original configuration, be sure to record the changes for later reference. If the EEPROM is replaced, this data must be re-entered to override the factory defaults.
  • Page 108 This page intentionally left blank. 3-48 | Model 920 Multi-Gas Analyzer...

  • Page 109: Chapter 4 Controller / User Interface

    CONTROLLER / USER INTERFACE This chapter contains information about the following topics: • An introduction to the User Interface. • How to work from the User Interface and navigate through the vari- ous screens. • How to view analyzer data, configure analyzer settings, and perform analyzer functions.

  • Page 110: Introduction To The User Interface

    During normal operating conditions in RUN mode, the bottom line continually displays the value of each output parameter being monitored/controlled by the analyzer. Depending on the operation mode or the command entered, other information can also be displayed on the bottom line. 4-2 | Model 920 Multi-Gas Analyzer...
  • Page 111 • Keypad The 21-key keypad allows you to view and/or change information  from the three main operation modes. The display is updated once Example keystroke commands can be seen in per second; therefore, the display of the result of a command may be “Navigation Examples”...

  • Page 112: Messages/Information Displayed On The User Interface

    When viewed from the HStatus screen, these alarms are displayed as (HS) RUNF5 41..7 “f RxData Fault” and “f Comm Fault”. For additional characters that indicate Flow Control modes (automatic and manual control), see “Flow Control (Sample) Modes” in this chapter. 4-4 | Model 920 Multi-Gas Analyzer...

  • Page 113: Navigating From The User Interface

    Navigating From the User Interface While working from the User Interface, there are three modes of opera- tion that you can access. In RUN mode, parameters or variables can only be viewed (they cannot be changed). In CAL or CFG mode, parameters or variables can be changed (passwords are required to enter these modes).

  • Page 114: Working In Run Mode

    • Operation constants and configuration data that can be seen in RUN mode, can be entered or changed in CFG mode. • The two factory-default passwords (for CAL and CFG modes) can be changed in CFG mode. 4-6 | Model 920 Multi-Gas Analyzer...

  • Page 115: Working In Cal Mode

    • To return to CFG mode normal display from any menu in CFG mode, press F6 0. • When entering commands, the User Interface will return to CFG mode normal display: - If you press a Function key that is not valid for your system. - If you press a numeric key that is not valid for your system.

  • Page 116: Navigation Examples

    6. To save the change, press Ent and then Esc to back out of this menu. At the “Save ConFig?” prompt, press Ent again to confirm the change. To discard the changes, press Esc. 4-8 | Model 920 Multi-Gas Analyzer...
  • Page 117 • Navigating in CAL mode (example): To manually change the analyzer’s Flow Control mode to Continuous Backpurge Flow: 1. From RUN mode, press F6 •. The message “PSWD0” appears. 2. Press • • (factory default password) or enter the new password, if changed.

  • Page 118: Entering Passwords To Change Analyzer Parameter Settings

    4. Enter the new password a second time and press Ent. Press Ent again to return to CFG mode normal display. If this password does not match the first entry of the new password, the message “<UNCHANGED>” is displayed. 4-10 | Model 920 Multi-Gas Analyzer...
  • Page 119 5. Press Esc. The User Interface will prompt you to accept the changes (“Save Config ?”). If Yes, press Ent to accept the new password. The display will exit the CFG mode and return to RUN mode. If No, press Esc to discard the changes. The display will exit the CFG mode and return to RUN mode.

  • Page 120: Run / Cfg Mode Quick Reference Sheet - Keystroke Commands

    (1..7) (1..4) AlcG VFRg LmpP Show MAIn (1..7) (1..6) (1..6) (1..2) (1..6) (1..8) SetPt NDRT O2Para TCycle Show HAIn Units (1..6) (1..2) (1..3) (1..5) (1..8) Figure 4-2. RUN / CFG mode Quick Reference Sheet. 4-12 | Model 920 Multi-Gas Analyzer...

  • Page 121: Cal Mode Quick Reference Sheet - Keystroke Commands

    CAL Mode Quick Reference Sheet – Keystroke Commands The CALibration (CAL) mode allows you to enter the variables required to tailor the analyzer for a specific application and to calibrate the analyzer. The CAL Mode Quick Reference Sheet lists all available commands that allow you to view screens and perform various tasks from this mode.

  • Page 122: Working In The Run / Cfg Operating Modes

    Definitions preceded by ‘**’ are used primarily for diagnosing prob- lems with the analyzer; therefore, these functions do not need to be NOTE accessed frequently. Factory-default values (if applicable) are listed for each parameter. Consult with AMETEK before changing any factory-default values. 4-14 | Model 920 Multi-Gas Analyzer...

  • Page 123: Run / Cfg Mode - F1 Commands

    RUN / CFG Mode – F1 Commands  Note the differences for the F1 • command in RUN and CFG modes. The Auto-Setup is not used in RUN mode. NOTE Keystroke Term Definition F1 • (RUN) — — F1 • (CFG) Auto-Setup The Auto-Setup optimizes PMT gains and the source lamp currents.
  • Page 124 You can, however, change the concentration units freely back and forth between PPM and mole percent (e.g., from Units = 0 to Units = 2, or from Units = 1 to Units = 3, or vice versa). 4-16 | Model 920 Multi-Gas Analyzer...

  • Page 125: Run / Cfg Mode - F2 Commands

    RUN / CFG Mode – F2 Commands Keystroke Term Definition F2 • MBAddr Modicon Modbus ® slave address – can be any value between 0–255. ‘0’ disables the Modbus ® communication. Addresses 1–127 select the RS-232 port and addresses 128–255 select the RS-422 port. F2 –...
  • Page 126 0 = 1-3-5, 4-6-2 filter sequence 8 = 3-5, 4-6-1-2 filter sequence 16 = 1-3-4-5, 6-2 filter sequence 24 = motorless bench Temperature Zone 3 (b5) Temp Zone3 Cooling Logic, SKO Heating Logic, Heater 4-18 | Model 920 Multi-Gas Analyzer...
  • Page 127 EPA-Style Probe Isolation Control (i.e., with Filter Flood) (b6) Probe Style Non-EPA Style Probe Isolation Control (i.e., without Filter Flood) EPA Style Probe Isolation Control (i.e., with Filter Flood) Span2 Controls (b7) Span2 Control Span2 Controls Calibration Gas Solenoid Span2 Controls System Isolation Blow-Back Solenoid b7 –...

  • Page 128: Run / Cfg Mode - F3 Commands

    6 = LCf6 F3 9 NDRTz ** Neutral drift compensation: drift-averaging time constant and update time interval, where ‘z’ = 1..2. 1 = NDRT1: drift-averaging time constant (seconds) 2 = NDRT2: drift update interval (seconds) 4-20 | Model 920 Multi-Gas Analyzer...

  • Page 129: Run / Cfg Mode - F4 Commands

    RUN / CFG Mode – F4 Commands Keystroke Term Definition F4 • AI:Msrz ** The analog channel number for the analog input signals, where ‘z’ = 1..6. Setting the analog input signals to ‘0’ disables the function. 1 = O Measurement and Dilution Air Computation (optional) Internal sensor (Zr733) AI:Msr1 = 24, or External sensor (linear) AI:Msr1 = 34, or...
  • Page 130 (0 %) to which the measured SO concentration is corrected. 2 = The concentration corresponding to zero voltage output (0.25 %) of the O Sensor. 3 = The concentration corresponding to the full-scale voltage output (25 %) of the Sensor. 4-22 | Model 920 Multi-Gas Analyzer...

  • Page 131: Run / Cfg Mode - F5 Commands

    RUN / CFG Mode – F5 Commands Keystroke Term Definition F5 • HCHistz History buffer for the last nine non-zero Host Controller board status codes where ‘z’ = 1..9. ‘1’ = oldest; ‘9’ = most recent. F5 – MCHistz History buffer for the last nine non-zero Microcontroller board status codes where ‘z’...
  • Page 132 – Sample Conditioning Unit, if used (default = 0 %) 3 = n/a – TZone3 – Spare 4 = celCycle – Heater Plate, Oven (default = 100 %) 5 = htrCycle – Analyzer Measuring Cell (default = 100 %) 4-24 | Model 920 Multi-Gas Analyzer...

  • Page 133: Run / Cfg Mode - F6 Commands

    RUN / CFG Mode – F6 Commands •,  Note the differences for the F6 F6 –, and F6 0 commands in RUN and CFG modes. NOTE Keystroke Term Definition F6 • (RUN) PSWD0 (CAL) This is the CAL mode entry password prompt, seen only after you press ‘F6 ·’ from RUN mode.
  • Page 134 1 = f so2 5 = f H2S 2 = f NO2 6 = f NDr (Neutral Drift) 3 = f NO 7 = f NOx 4 = f SO2 F6 7 — — 4-26 | Model 920 Multi-Gas Analyzer...
  • Page 135 F6 8 z Show MAIz The Show Microcontroller Board’s Analog Inputs (MAI) function allows you to view the analog input values, where ‘z’ (z = 1..8) is defined by MAI below. The signal level (volts or scaled parameter units) are also displayed. To view the operating temperature for each temperature zone or for the Heater Plate, press the key for that parameter.

  • Page 136: Configuring The Analyzer Control Functions

    Result 5 (reserved) Result 6 (Neutral Drift) Result 7: sum of Result 2 and Result 3 (NO in SO / NO application) Reserved Result 9 (O output) Figure 4-4. Calculated Result (Parameter) Codes. 4-28 | Model 920 Multi-Gas Analyzer...

  • Page 137: Assigning Output Signals With The Track-And-Hold Function Enabled/Disabled

    Assigning Output Signals With the Track-and-Hold Function Enabled/ Disabled When enabled, the Track-and-Hold function maintains the output at the value calculated just before an Auto-Zero begins. When disabled, the outputs are forced to use the operator-entered fixed values. The outputs will hold at these values for the duration of the Auto-Zero and the Sample Delay Time (SDelay).

  • Page 138: Analog Input Channels - Micro-Interface Board

    “Top,” “Middle,” “Bottom” where “Top” is the position nearest the jumper label on the board. Micro-Interface Board Jumper Positions Input Channel Jumper Header Jumper Position Range (VDC) P100 Bottom 0–10 P101 Middle 0–5 P100 P101 Figure 4-5. Micro-Interface board. 4-30 | Model 920 Multi-Gas Analyzer...

  • Page 139: Display I/O Board Analog Input Signals

    Display I/O Board Analog Input Signals The Display I/O board inputs 1 to 4 each have (3) jumper-selectable ranges: 0–1 V, 0–5 V, 0–10 V (ranges are marked on board). The jumper positions are referenced by “Top,” “Middle,” “Bottom” where “Top” is the position nearest the jumper label on the board (Figure 4-6).

  • Page 140: Working In The Cal Operating Mode

    (Term) of the screen, and a Definition of each parameter. “–” indicates the command is not used.  Definitions preceded by ‘**’ are used primarily for diagnosing prob- lems with the analyzer; therefore, these functions do not need to be NOTE accessed frequently. 4-32 | Model 920 Multi-Gas Analyzer...

  • Page 141: Cal Mode - F1 Commands

    CAL Mode – F1 Commands Keystroke Term Definition F1 • — — F1 – — — F1 0 Auto/Zero? Automatic adjustment of the analyzer Zero. The Zero gas (air) solenoid is turned on and off automatically during the Zero. The Zero Offset is adjusted based on the average reading during the last 25 % of the Timer0 countdown only if AdjDisable is set to ‘0’.

  • Page 142: Cal Mode - F2 Commands

    Zero gas. The Zero gas must be introduced manually into the analyzer sample system. For systems with the O Sensor, refer to the O Concentration Measurement Manual Supplement for details about how to manually Zero the O Sensor. 4-34 | Model 920 Multi-Gas Analyzer...

  • Page 143: Cal Mode - F3 Commands

    CAL Mode – F3 Commands Keystroke Term Definition F3 • — — F3 – — — F3 y Timery Sets the duration the solenoid valve controlling the Zero or Calibration gas connected to SSR output ‘y’ is energized during the Auto-Zero, Auto-Span, and Auto-Calibration func- tions, where ‘y’...

  • Page 144: Cal Mode - F4 Commands

    Calibration gas (typically 20.95 %). Used in applications where the emission rate is calculated using a fuel factor. Bw is the F4 9 water content (%) in the air used in the combustion process. 4-36 | Model 920 Multi-Gas Analyzer...

  • Page 145: Cal Mode - F5 Commands

    CAL Mode – F5 Commands Keystroke Term Definition F5 • — — F5 – — — F5 0 Sol:Rz n Assigns SSR output ‘n’ (where ‘n’ = 0..2) controlling a Calibration gas solenoid valve to the calculated result (R), ‘z’, where ‘z’ = 1..6. The same SSR output can be assigned to more than one calculated result.
  • Page 146 The default absolute pressure for the Measuring Cell (mm Hg or "Hg). This value is used in place of the measured Measuring Cell pressure when active pressure compensation is disabled (CFG : F4 • 3 = 0). Default = 760.00 mm Hg. 4-38 | Model 920 Multi-Gas Analyzer...

  • Page 147: Cal Mode - F6 Commands

    CAL Mode – F6 Commands Keystroke Term Definition F6 • — — F6 – — — F6 0 IZeroz The measured current (mA) in the current output loop when the output is set to zero-scale during the analyzer Zero, where ‘z’ = Output Channels 1..4. Refer to the Output Signal Assignment code for the outputs assigned to these channels (press F2 6 from CFG mode).

  • Page 148: Setting Up Analyzer Calibration Functions

    Continuous Calibration Gas #2 Flow – local (manual, by operator)  * The ‘B’ character is also displayed when the Remote Backpurge function (optional) is manually activated via a remote dry (potential NOTE free) contact opening. 4-40 | Model 920 Multi-Gas Analyzer...

  • Page 149: Analyzer Control Mode (Automatic Control By Analyzer)

    Analyzer Control Mode (Automatic Control by Analyzer) When the analyzer’s Flow Control mode is set to Analyzer Control, the analyzer automatically determines and sets the mode of operation by monitoring the state of the Fault alarm relay contacts. If there are no active Fault alarms, the analyzer will operate in Analyzer Control mode (automatic Sample).

  • Page 150: Continuous Backpurge Flow Mode (Manual Control By Operator)

    Zero gas; it will not automatically switch to another mode. When you manually force the analyzer into Continuous Zero Gas Flow, “Z” is displayed on the top-left line. To manually force the analyzer to this mode, press: CAL>F5 2 Del 10 Ent Ent 4-42 | Model 920 Multi-Gas Analyzer...

  • Page 151: Continuous Calibration Gas Flow Mode (Manual Control By Operator)

    Continuous Calibration Gas Flow Mode (Manual Control by Operator) When the analyzer’s Flow Control mode is manually set to Continuous Calibration Gas Flow, the analyzer sample system is continuously back- purged with Calibration Gas 1 or Calibration Gas 2; it will not automati- cally switch to another mode.

  • Page 152: Setting Calibration Gas Timers

    Timer2 is not required for control of a calibration gas mixture. Its duration must be set to ‘0’ (off). To set Timer2 to ‘0’ and return to CAL mode nor- mal display, press: CAL>F3 2 Del 0 Ent Ent 4-44 | Model 920 Multi-Gas Analyzer...

  • Page 153: Integration Timer (Inttime)

    Integration Timer (IntTime) The IntTime sets the duration over which the readings are averaged dur- ing manual calibrations. The IntTime duration can be set from 0–65535 seconds in one-second increments. Set the duration to ‘0’ to use the de- fault averaging time of 15 seconds. Example: To set IntTime to 25 seconds and return to CAL mode normal display, press:...

  • Page 154: Setting The Sample Delay Timer (Sdelay)

    CAL Status Relay will indicate the calibration is complete immediately fol- lowing the end of the calibration. Example: To set SDelay to 4 minutes and return to CAL mode normal display, press: CAL>F3 7 Del 4 Ent Ent 4-46 | Model 920 Multi-Gas Analyzer...

  • Page 155: Manual Zero/Span

    Manual Zero/Span The Manual Zero and Manual Span do not activate the solenoid valves. The gases must be introduced manually into the analyzer and allowed to flow through the sample system until a stable reading is displayed. The time required for Calibration gas to reach the analyzer and for a stable reading to be achieved and displayed is dependent upon the volume of the sample system and Calibration gas flow rate.
  • Page 156 #2 mode. This will allow the flow of Calibration Gas to manually span (FlowCtrl) CALF5 2 Del nn Ent Ent (where nn = the sample system. ‘11’ for Calibration Gas #1 or ‘12’ for Calibration Gas #2). 4-48 | Model 920 Multi-Gas Analyzer...
  • Page 157 4. To initiate the Manual Span, press F2 y, where ‘y’ = 1..6 (Calibration  gas for each component). The User Interface will prompt “Man/ (ManSpany) CAL F2 2Del ‘y’ Ent Ent Spany?”. Observe the concentration reading for the component on the bottom line of the User Interface.
  • Page 158 4. Turn off the Calibration gas. The Span for NO is complete. 5. Return the analyzer to the original Flow Control mode by pressing F5 2 Del n Ent where ‘n’ is the numerical value recorded earlier. 4-50 | Model 920 Multi-Gas Analyzer...

  • Page 159: Spanning Dual Range

    Spanning Dual Range The Model 920 Analyzer is equipped with dual ranging algorithms used for SO measurement. With this algorithm, an analyzer can be used in ap- plications where the SO concentrations may greatly vary. The analyzer has, for example, a ± 1% accuracy of reading for SO con- centrations ranging from 50–5000 ppm.
  • Page 160 F2 4. Run the high range Span gas through the analyzer for at least 5 minutes. Typical flow rates are 1–2 SCFH. When the readings have stabilized at or near ‘0’, press Ent. Turn off the Calibration gas. 4-52 | Model 920 Multi-Gas Analyzer...

  • Page 161: Solenoid Valve Control

    Calibration gas mixture is switched by SSR Output 2, SSR Output 2 will be assigned to Result 1 (SO concentration). Because the Model 920 Analyzer supports the use of a multi-component calibration gas mixture, the same SSR Output can be assigned to more than one cal- culated result.

  • Page 162: Calculated Result Name

    Calculated Result (Parameter) Names Result Keystroke Number Sequence Name F6 3 1 F6 3 2 F6 3 3 F6 3 4 F6 3 5 F6 3 6 F6 3 7 4-54 | Model 920 Multi-Gas Analyzer...

  • Page 163: Ssr Output Assignment

    SSR Output Assignment A SSR output is assigned to a calculated result by assigning its output number (0..2) to the result. If a calculated result does not require the use of a Calibration gas mix- ture, assign SSR output ‘0’ to it. CAUTION To assign a SSR output to a calculated result: 1.
  • Page 164 2. Assign ‘0’ to Result 2 (NO concentration) by pressing: F5 0 2 Del 0 Ent 3. Assign ‘0’ to Result 3 (NO concentration) and return the CAL mode normal display by pressing: F5 0 3 Del 0 Ent Ent 4-56 | Model 920 Multi-Gas Analyzer...
  • Page 165 Example 3: The names for the calculated results are: Result 1 = concentration Result 2 = concentration Result 3 = NO concentration Result 4 = concentration Calibration gas mixtures are required for spanning both SO and NO . The solenoid valve controlling the SO Calibration gas mixture is connected to SSR Output 2 and the solenoid valve for controlling the NO Calibration...

  • Page 166: Auto-Zero/Auto-Span

    25 % of the timer dura- tion (minutes) of the countdown (if AdjDisable is set to ‘0’). Upon completion of the Auto-Zero/Auto-Span, CAL mode normal display is returned. The IntTimer does not affect the averaging time for the Auto-Zero/Auto-Span. 4-58 | Model 920 Multi-Gas Analyzer...
  • Page 167 4. The CAL Status relay will stay on longer, determined by the SDelay timer, to allow for a smooth transition from the Zero or Calibration gas mixture back to the sample gas. The User Interface gives no indication that this is occurring. Pressing Esc at any time during this procedure will abort the func- ...

  • Page 168: Manual Start Of Auto-Zero

    Upon completion of the sequence, enter another command, or press Esc to return to RUN mode normal display. Timed Start of Auto-Zero The analyzer automatically initiates the Auto-Zero on a timed basis. The AZInt timer sets the time interval between Zeroes. 4-60 | Model 920 Multi-Gas Analyzer...

  • Page 169: Manual Start Of Auto-Span

    Manual Start of Auto-Span  Auto-Span 2 and its associated timer (Timer 2) is used only when the optional O Sensor is used (General Purpose applications/ana- NOTE lyzers only). To manually start the Auto-Span 1 or Auto-Span 2 (from CAL mode): 1.

  • Page 170: Auto-Calibration

    Subsequent Auto-Calibrations will be initiated at every ACal interval. Example: If the ACal Timer is set to ‘3’ and the analyzer is powered up or reset, the first Auto-Calibration will occur at 3 hours if all temperatures are reached. 4-62 | Model 920 Multi-Gas Analyzer...

  • Page 171: Manual Start Of Auto-Calibration

    Manual Start of Auto-Calibration A manual start of Auto-Calibration does not reset the ACal Timer to its initial value. The start of the next Auto-Calibration will be timed from the continuing countdown of the original ACal Timer setting. To manually start the Auto-Calibration, press F1 9 Ent (CAL mode).

  • Page 172: Remote Start Of Auto-Calibration

    DCS is the only source of Auto-Calibration requests. The ACal timer must be set to ‘0’ for this application. For more informa- tion, see “Timed Start of Auto-Calibration” in this section. 4-64 | Model 920 Multi-Gas Analyzer...
  • Page 173 Figure 4-8. Customer signal connections. Controller / User Interface | 4-65...

  • Page 174: Analog Output Calibration

    Full-scale value is entered and displayed. Calibration complete Ent To return to CAL mode normal display, or To return to RUN mode normal display, or Enter another command to perform another function. 4-66 | Model 920 Multi-Gas Analyzer...
  • Page 175 Example 1: To calibrate the current output signal for Output Channel 1 and return to CAL mode normal display, press: F6 0 1 Del Sets the output to zero-scale. 3.97 Ent The current meter reading is 3.97 mA. F6 1 1 Del Sets the output to full-scale.

  • Page 176: Probe Blow-Back Control (Optional)

    Probe Blow-back Interval (min) Sample Delay (sec) Probe Blow-back Duration (sec) Probe Blow-back Pulse Width (sec) 2x Probe Blow-back Pulse Width NOTE: Illustration only. Not to scale. Figure 4-9. Probe Blow-Back Timing Chart, example. 4-68 | Model 920 Multi-Gas Analyzer 12/31/2008...

  • Page 177: Chapter 5 Maintenance And Troubleshooting

    MAINTENANCE and TROUBLESHOOTING This chapter discusses preventive maintenance to keep the analyzer sample system operating at peak efficiency, how to check for plugging in the analyzer sample system, and how to replace internal parts. This chap- ter also discusses how to view alarms (errors) that can be used to diagnose and troubleshoot problems with the analyzer.

  • Page 178: Preventive Maintenance

    Most leaks are preventable with regular cleaning and replacement of the Measuring Cell o-rings. Leak check the analyzer’s sample system whenever it has been dis- mantled for maintenance. 5-2 | Model 920 Multi-Gas Analyzer...

  • Page 179: Analyzer Preventive Maintenance Schedule

    If the analyzer sets alarms that indicate a faulty component requires replacement (see “Troubleshooting and Diagnostics” in this chapter), WARNING follow the corresponding replacement procedure in this chapter. For complex maintenance procedures not discussed in this manual, such as replacing heaters, RTDs, or electronic boards, contact AMETEK.
  • Page 180 Inspect the Sample Line and Vent Line (if used) for sags, sharp bends, or damage to the outer skin. If necessary, take appropriate safety precautions and replace the lines. Perform a leak check on all associated fittings after replacing any line(s). 5-4 | Model 920 Multi-Gas Analyzer...
  • Page 181 Frequency Task Source Lamps 9–12 Months Replace the source lamps. The lamps may require replacement sooner if analyzer alarms are set (“w Lamp Control” or “w PMT Signals”). See also “Source Lamp Replacement” and “Troubleshooting and Diagnostics” in this chapter. Measuring Cell Every Year Replace the o-rings and Cell Windows and clean the interior surfaces to...

  • Page 182: Expo Technologies Minipurge ® System With Etimer (Optional) Preventive Maintenance Schedule

    The risk of developing a collection of liquids in low spots or plugging in the sample system is further reduced by sloping the Sample Line and Vent Line (if used) from the analyzer back to the sample extrac- tion point. 5-6 | Model 920 Multi-Gas Analyzer...
  • Page 183 • Performing regular maintenance (see “Analyzer Preventive Maintenance Schedule” in this chapter). • Observing the analyzer response time regularly and taking action im- mediately if longer response times are noticed (perform maintenance on components suspected to be restricted or plugged). Detecting a plug in the sample system: This is best done by observing the analyzer’s measurement response time immediately following a Zero.

  • Page 184: Changing Out Replaceable Parts

    • Any time an unscheduled cleaning is performed. • If the analyzer responds slowly to a Zero when the sample system is free of restrictions. • If evidence of contamination is present in the sample tubing. 5-8 | Model 920 Multi-Gas Analyzer...
  • Page 185  “P/N” refers to Part Number. NOTE To clean and replace parts in the Measuring Cell (Figures 5-1 and 5-9): Hazardous Locations Before proceeding, test the area around the analyzer for flammable WARNING gases and proceed only when the area is found to be safe. Do not open the Electronics Enclosure or other covers/doors, and do not power up/down the analyzer (or computer) if there is a flammable gas atmosphere present.
  • Page 186 If the Measuring Cell has a Mirror or Window/Mirror combina- tion, be careful not to touch the Mirror/Reflective surface with your fingers, scratch or rub the Mirror, or use water on the Mirror. 5-10 | Model 920 Multi-Gas Analyzer...
  • Page 187 Figure 5-1. Measuring Cell assembly. Maintenance and Troubleshooting 5-11...
  • Page 188 7. Replace parts in the Measuring Cell: If the Cell Windows are found to be scratched, cracked, or chipped, replace them during reassembly. Do not operate the analyzer with CAUTION faulty parts. Handle the Window only by its outside edge. 5-12 | Model 920 Multi-Gas Analyzer...
  • Page 189 a. Install (1) new o-ring (P/N 100-1911) in the groove on the flat sur- face of the Reflector Block. Hold the Measuring Cell vertically with the Reflector Block end up and install (1) new o-ring (P/N 100-1911) and Window (P/N 300-0281).
  • Page 190 Measuring Cell does not move, being careful not over tighten it. Do not use a ball driver. Over-tightening this screw will damage the threads on the RTD. Replace the Heat Transfer Block Plug in the Heat Transfer Block. 5-14 | Model 920 Multi-Gas Analyzer...
  • Page 191 9. Connect the sample tubing to the Measuring Cell. 10. GP Analyzers Only: Turn on the Instrument Air supply to the analyzer and open the Aspirator Air valve. 11. Power up the analyzer: It is necessary to work with the Electronics Enclosure door open after replacing parts in the Heater Assembly.
  • Page 192 Del 0 Ent 16. Adjust the Aspirator Drive Air Regulator to achieve normal operating  flow rates. See “Setting the Sample Gas Flow Rate and The procedure is complete. Sample Response Time” in Chapter 3. 5-16 | Model 920 Multi-Gas Analyzer...

  • Page 193: Replacing The Source Lamps

    Replacing the Source Lamps The typical life span of the source lamps is approximately 9–12 months of continuous operation. However, a source lamp can exhibit signs of degra- dation after 5–6 months.  For more lamp maintenance information, see the Model 9xx-Series Analyzers “Lamp Maintenance Manual Supplement”...

  • Page 194: Source Lamp Replacement

    Open the explosion-proof power-disconnect switch to disconnect power from the analyzer and its temperature zone circuitry. Open the Electronics Enclosure. Wait 5 minutes to allow the high-voltage capacitors in the source- lamp power supply to discharge. WARNING 5-18 | Model 920 Multi-Gas Analyzer...
  • Page 195 3. GP Analyzers Only: Turn off the Instrument Air supply to the analyzer and then close the Aspirator Air valve. Purged Analyzers:  The Instrument Air supply must always remain on for the Purge The Purge Bypass Switch must be in the Bypass Switch to operate properly.
  • Page 196 The lamp must be allowed to move so it can be adjusted later. 6. GP Analyzers Only: Turn on the Instrument Air supply to the analyzer and open the Aspirator Air valve. 5-20 | Model 920 Multi-Gas Analyzer...
  • Page 197 7. Power up the analyzer: It is necessary to work with the Electronics Enclosure door open after replacing source lamps so that adjustments can be made to the lamps. WARNING When the analyzer’s covers and doors are open, take appropriate precau- tions to avoid electrical shock.
  • Page 198 The message “SIGz m.mmm r.rrr” is displayed, where ‘z’ is the filter location, m.mmm is the Measure PMT signal, and r.rrr is the Reference PMT signal. The PMT signal values are updated at one-second intervals. 5-22 | Model 920 Multi-Gas Analyzer...
  • Page 199 Example: If replacing Lamp 1, and the filter location with the highest lamp pulse current-control value is Filter 3, the PMT signal for Filter 3 is displayed by pressing F6 1 3. If either the Measure or Reference PMT signal becomes equal to or greater than 10.000 V at any time during lamp alignment, decrease CAUTION the PMT level (CFGF1 4 to view PmtLvl screen) in one-volt incre-...
  • Page 200 Del 0 Ent 26. Adjust the Aspirator Drive Air Regulator to achieve normal operating  flow rates. See “Setting the Sample Gas Flow Rate and Sample Response Time” in The procedure is complete. Chapter 3. 5-24 | Model 920 Multi-Gas Analyzer...

  • Page 201: When Is An Auto-Setup Required / Not Required

    When is an Auto-Setup Required / Not Required? The Auto-Setup optimizes PMT (photomultiplier tube) gains and the source lamp currents. After the Auto-Setup is complete, the Automatic Lamp Control (Alc On) is automatically turned on. View the current sta-  tus of this function on the Alc screen (‘0’...

  • Page 202: Pmt Level And Pmt Balance

    • Do the source lamps need replacement (weak lamps)? If not, are the source lamps aligned? • If the lamps were replaced, is the correct socket connected to the cor- rect lamp? Lamp 1 is the closest to the Optical Bench board. 5-26 | Model 920 Multi-Gas Analyzer...

  • Page 203: Auto-Setup Fault Messages And Corrective Action

    • Have there been any leaks from the Measuring Cell? If so, check the condition of the Optical Filters, Beam Splitter, Mirrors, Windows, Lenses, and o-rings in the Optical Bench and in the Measuring Cell (including Reflector Block). Contact AMETEK for procedures not discussed in this manual.

  • Page 204: The Auto-Setup Sequence

    3. After the value of ‘b’ is between 0.75–1.25, press Ent Esc. The message “SAVE CONFIG?” will appear. Press Ent for Yes (to save the new con- figuration), and then press Esc to return to RUN mode normal display. 5-28 | Model 920 Multi-Gas Analyzer...

  • Page 205: Manipulating The Completion Number, Pmt Level, And Pmt Balance

    Manipulating the Completion Number, PMT Level, and PMT Balance In certain situations (for example, degradation of PMTs or lamps, or the optics are contaminated), it may be necessary to change the P300 and P301 jumper settings on the Optical Bench board. Changing the jumper posi- tions provides coarse gain adjustment of the Reference PMT and therefore changes the completion number result, PMT Level, and PMT Balance.
  • Page 206 Optical Bench board Higher Lower PMT P300/P301 jumper Completion Balance positions vs PMT Number Balance.  When changing jumpers, one must be present in one of the six posi- tions at all times. NOTE 5-30 | Model 920 Multi-Gas Analyzer...

  • Page 207: Chopper Assembly Maintenance

    Chopper Assembly Maintenance Replace the Chopper Motor Drive Belt and Bearings in the Chopper  Assembly every 2 years. See Chapter 6 for spare part ordering numbers.  “P/N” refers to Part Number. NOTE To replace the Drive Belt and Bearings in the Chopper Assembly (Figures 5-4 and 5-5): Hazardous Locations Before proceeding, test the area around the analyzer for flammable...
  • Page 208 Remove the Heat Transfer Block Plug from the Heat Transfer Block and then remove the M4 x 25 screw using only a flat hex key. Do not use a ball driver – the head can break off inside the screw. 5-32 | Model 920 Multi-Gas Analyzer...
  • Page 209 Figure 5-4. Optical Bench board (100-1662) layout. c. Wearing insulated gloves, grasp the Measuring Cell and carefully pull it straight out from the Heater Plate and Cell RTD (Figure 5-9). Once the Measuring Cell has cleared the Cell RTD, swing the Optical Bench Assembly outward, away from the analyzer.
  • Page 210 Chopper Wheel and Pulley grooves, and to make sure the Bearings and other parts are properly aligned. Align the two halves of the Chopper Assembly and secure them using (4) M3 x 8 screws. 5-34 | Model 920 Multi-Gas Analyzer...
  • Page 211 Figure 5-5. Optical Bench Chopper Assembly Maintenance Diagram. Maintenance and Troubleshooting 5-35...
  • Page 212 Align the hole in the Heat Transfer Block with the Cell RTD tip on the Heater Plate and carefully push the Measuring Cell toward the RTD. Adjust the entire Measuring Cell/Optical Bench Assembly as required to firmly seat the Measuring Cell against the Heater Plate. 5-36 | Model 920 Multi-Gas Analyzer...
  • Page 213 Using a flat hex key, replace the M4 x 25 screw in the counter bore hole in the Heat Transfer Block and thread it onto the Cell RTD (until it is snug). Do not use a ball driver. Do not tighten the screw at this time.
  • Page 214 Do not close the Oven Heater fuse at this time, until after the Leak Check has been performed. 13. Perform a leak check on the sample system fittings that were  disconnected. See “Sample System Leak Check” in Chapter 3. 5-38 | Model 920 Multi-Gas Analyzer...
  • Page 215 14. Close the Oven fuse to apply power to its Heater. Close and secure the Electronics Enclosure door with its (3) M6 screws to secure the Optical Bench in place. Close and latch the Oven door. Close and secure all other analyzer covers and doors, if not already done.

  • Page 216: Replacing Parts In The Heater Plate

    Analyzer, See Fuse Legend inside Electronics Enclosure Oven Heater, and HAG Probe (if used) fuses, and by removing the door. Sample and Vent (or SCU, if used) Line fuses. 5-40 | Model 920 Multi-Gas Analyzer...
  • Page 217 Purged Analyzers (Hazardous Locations): Open the explosion-proof power-disconnect switch to disconnect power from the analyzer and its temperature zone circuitry. Open the Electronics Enclosure. Wait 5 minutes to allow the high-voltage capacitors in the source- lamp power supply to discharge. WARNING 3.
  • Page 218 Remove the (4) M6 x 25 screws and carefully separate the Upper Heater Plate from the Lower Heater Plate. Lean its top against the Oven wall to expose the internal RTDs and Heater Elements. Take care not to damage the internal wires. 5-42 | Model 920 Multi-Gas Analyzer...
  • Page 219  OPTIONAL If working on the Heater Plate with it still in the Oven is not practi- NOTE cal, remove it from the Oven. To do this, record all wire termination points at the Terminal Strips (J1, J2) inside the Seal Body and then disconnect the wires.
  • Page 220 Repeat Steps ‘a’ through ‘e’ if replacing the optional Sulfur Condenser RTD (if used).  If the Sulfur Condenser RTD is not used, the hole is plugged with a Heater Blanking Plug. NOTE 5-44 | Model 920 Multi-Gas Analyzer...
  • Page 221 Figure 5-6. Oven/Instrumentation layout, CE/Zone 1.  Figure 5-6 illustrates a typical Oven/Instrumentation layout for CE/ Zone 1 analyzers. For your system, refer to Final “As Built” drawings NOTE in the analyzer Documentation Package. Maintenance and Troubleshooting 5-45...
  • Page 222 Ensure the threads of the Thermal Insulating Tube are clean and then thread the tube back into the Heater Plate, taking care not to cross- thread the threads. Tighten the tube until an increase in resistance is felt. Do not overtighten it. 5-46 | Model 920 Multi-Gas Analyzer...
  • Page 223 Replace the (4) lock washers and M6 x 35 screws to secure the Heater Plate to the Oven wall. Gently push and pull on the Heater Plate while tightening the screws, to ensure it is properly seated against the Oven wall. Tighten the gland nut on the Seal Body.
  • Page 224 Connect the Sample and Vent Lines to their connection points in the Oven. Ensure the sample tubing is connected to the Measuring Cell. 20. GP Analyzers Only: Turn on the Instrument Air supply to the analyzer and open the Aspirator Air valve. 5-48 | Model 920 Multi-Gas Analyzer...
  • Page 225 Figure 5-7.1. Flameproof Heater/Seal Assembly, 100-1190-1. Figure 5-7.2. Heater Termination board Terminal Strips J1, J2 wiring layout. Maintenance and Troubleshooting 5-49...
  • Page 226 Figure 5-8. Flameproof Heater/Seal Assembly layout, WX-14324-1A. 5-50 | Model 920 Multi-Gas Analyzer...
  • Page 227 Figure 5-9. Flameproof Heater/Seal, internal component layout, 100-1622-1A. Maintenance and Troubleshooting 5-51...
  • Page 228 Figure 5-10. Oven Heater and Temperature Sensor wiring, WX-14161. 5-52 | Model 920 Multi-Gas Analyzer...
  • Page 229 21. Power up the analyzer: It is necessary to work with the Electronics Enclosure door open after replacing parts in the Heater Assembly. WARNING When the analyzer’s covers and doors are open, take appropriate precau- tions to avoid electrical shock. Hazardous voltages are present inside. GP Analyzers: Close the HAG Probe (if used) fuse and Oven Heater fuse, and replace the Sample and Vent (or SCU, if used) Line fuses.

  • Page 230: Optional Hag Sample Probe Preventive Maintenance

    Probe is not discussed in this guide, but it is important to maintain it at recommended intervals. When possible, perform maintenance on the HAG Probe at the same time as the analyzer. For probe maintenance de- tails, refer to the HAG Probe Installation and Maintenance Guide. 5-54 | Model 920 Multi-Gas Analyzer...

  • Page 231: Examining And Caring For The Flamepaths

    Examining and Caring For the Flamepaths The analyzer is designed with flamepaths that will prevent flame propa- gation from within the analyzer and its Ex d Disconnect Enclosure to the outside, should an internal explosion occur. The flamepaths on the analyzer consist of: •...

  • Page 232: Disconnect Enclosure Flamepath (Joining Surfaces)

    (main power to the WARNING analyzer is off, explosive gas atmosphere is not present, etc.). Before performing maintenance on the analyzer, shut off the power to the analyzer and all alternate power supplies (if used). 5-56 | Model 920 Multi-Gas Analyzer...

  • Page 233: Heater Plate Flange Flamepath (Joining Surfaces)

    Heater Plate Flange Flamepath (Joining Surfaces) Normally, the parts that make up the Heater Plate and its Seal Assembly are not subject to any movement that would cause damage or wear to any of the parts. However, any time the Heater Plate and its Seal Assembly are opened, inspect the flamepath for scratches, indentations, or other dam- age.

  • Page 234: Troubleshooting And Diagnostics

    Troubleshooting and Diagnostics Model 920 Analyzers have a built-in alarm (error) detection system that continuously monitors the operation of key analyzer operating param- eters. An alarm can be detected by either the Host Controller or the Microcontroller board and can be of two types: •...
  • Page 235 If two or more alarms are detected simultaneously, the displayed alarm status code is a sum of the primary alarm codes. To resolve a non-primary status code into its primary alarm codes, subtract the largest primary alarm code from the displayed number. Continue to subtract the largest primary code from the remainder until a primary alarm code is left.

  • Page 236: Host Controller Board Alarm Conditions And Corrective Action

    • Replace the EEPROM as soon as possible. Contact AMETEK to verify operation before removing the EEPROM and for information about installing the new EEPROM to ensure your analyzer will operate the same as it did prior to replacing the EEPROM. 5-60 | Model 920 Multi-Gas Analyzer...
  • Page 237 HS Code HStatus Alarm Type Condition / Description and Suggested Corrective Action Warning w Out of Range The concentration of the output exceeds its normal operating full- scale range by more than 10 %. Corrective Action:  (Output) RUNF2 6 •...
  • Page 238 (TType) RUNF4 4 sistance. 1..4 - Replace the Temperature Sensor (RTD) Daughter board(s). Contact AMETEK to verify operation before removing this board. - Replace the Termination board. Contact AMETEK to verify operation before removing this board. 5-62 | Model 920 Multi-Gas Analyzer...
  • Page 239 HS Code HStatus Alarm Type Condition / Description and Suggested Corrective Action Fault f Temp High One or more of the temperature zones has exceeded its over- temperature limit of 177 °C/350 °F. When the analyzer detects this alarm, it will automatically switch to Backpurge mode and also de-energize the over-temperature relay for the zone that has exceeded its limit.
  • Page 240 Refer to “Analyzer Preven- tive Maintenance Schedule” and “Measuring Cell Maintenance” in this chapter to help you determine if these areas need to be cleaned. Figure 5-11. Micro-Interface board. 5-64 | Model 920 Multi-Gas Analyzer...
  • Page 241 Figure 5-12.1. Sample/Vent Line Wiring (Disconnect Enclosure), Zone 1 Analyzer. Maintenance and Troubleshooting 5-65...
  • Page 242 Figure 5-12.2. Sample/Vent Line Wiring, GP/Div 2 Analyzer. 5-66 | Model 920 Multi-Gas Analyzer...
  • Page 243 Figure 5-13. Over-temp alarm reset switch (SW300), Termination board. Maintenance and Troubleshooting 5-67...

  • Page 244: Microcontroller Board Alarm Conditions And Corrective Action

    Take appropriate safety precautions, open the Electronics Enclo-  sure, and: See Ribbon Cable • Check the Chopper Wheel Optocoupler cable connection. Interconnect drawing in Appendix A. • Check the Chopper Wheel motor connection. 5-68 | Model 920 Multi-Gas Analyzer...
  • Page 245 MS Code MStatus Alarm Type Condition / Description and Suggested Corrective Action Fault f On-board ADC One or both of the discrete analog-to-digital converters (ADC) is not responding. Corrective Action: Take appropriate safety precautions, open the Electronics Enclo- sure, and: •...
  • Page 246 (cuts, nicks, burn marks, etc.). • Ensure the actuators on switch S100 on the Micro-Interface board are positioned toward the middle of the board. See Figure 5-11 for switch location. 5-70 | Model 920 Multi-Gas Analyzer...
  • Page 247 MS Code MStatus Alarm Type Condition / Description and Suggested Corrective Action Warning w Lamp Control One or both lamp pulse current-control signals has exceeded 9.5 VDC. The Lamp Maximum range is typically 4.5–7.8 VDC (may vary, check EEPROM Data Sheets for actual value). This alarm may occur during a cold start, but should clear after the source lamps have stabilized.

  • Page 248: Analyzer Reset

    Typically, the only resets required are in cases where the Host CAUTION Controller or Microcontroller boards have been replaced. In this case, it is necessary to shut down the analyzer. The analyzer will reset upon normal power-up. 5-72 | Model 920 Multi-Gas Analyzer...

  • Page 249: Chapter 6 Service And Parts

    SERVICE and PARTS This chapter discusses what to do if you need technical support from AMETEK, or if you are returning parts for service. This chapter also lists the recommended spare parts to have on hand to ensure preventive maintenance is performed according to the schedule in Chapter 5. Technical Support AMETEK Western Research is committed to providing you the best tech- nical support in the industry.

  • Page 250: Returning Equipment

    To obtain a RMA number, contact your local or nearest AMETEK Service Centre and have the following information available: • Analyzer Model number. • Analyzer Serial number. • Purchase order number. • Billing address, shipping address, and telephone number. 6-2 | Model 920 Multi-Gas Analyzer...

  • Page 251: Answers To Your Questions

    ?? ANSWERS TO YOUR QUESTIONS ?? The choice is yours... Whether by phone or in person, we can meet the needs required to keep your analyzer running at peak performance. Our factories are located in Calgary, Alberta and Newark, Delaware with a Sales & Service Centre in Houston, Texas.

  • Page 252: Recommended Preventive Maintenance Spare Parts

    Recommended Preventive Maintenance Spare Parts This section lists the recommended spare parts to have readily available for the Model 920 Analyzer to ensure the analyzer and its sample system operate at peak efficiency.  IMPORTANT SPARE PARTS INFORMATION Spare Parts for your analyzer may vary from those included in this NOTE section.
  • Page 253 Optical Bench Spare Parts, 120 VAC/240 VAC Analyzer Part No. Description (1 Year) (2 Year) (*) Note: Lamp type is dependent on species being measured. 100-0688 SO2 Applications Magnesium (Mg) Source Lamp (Optical Bench Assembly) [see (*) [see (*) Caution] Caution] 300-2070 H2S Applications...

  • Page 254: Sample Conditioning Unit (Scu) Spare Parts

    Filter Element 300-9256 Gasket Set, Viton M&C Probe Part No. Description (1 Year) (2 Year) 300-9266 Ceramic Filter Element 300-9267 Filter Element Gasket 300-9268 Lid Seal O-Ring, 39 mm 300-9269 Lid Seal O-Ring, 55 mm 6-6 | Model 920 Multi-Gas Analyzer...

  • Page 255: Spare Analyzer Fuses

    Spare Analyzer Fuses AMETEK recommends having on-site spare fuses used in the analyzer. These fuses do not need to be changed out at regular intervals, but are necessary in the event that a fuse has blown and a replacement is required.
  • Page 256 Disconnect Enclosure Fuse (Zone 1 and CE Analyzers) Customer Signal Termination Board (100-1215-2) Part No. Fuse Type 300-5790 125 mA This fuse is located at F100 on Customer Signal Termination board (in Disconnect Enclosure). 6-8 | Model 920 Multi-Gas Analyzer...

  • Page 257: Replacement Boards

    Replacement Boards If you require replacement boards for the analyzer, use the following part numbers. Part No. Description 100-0116 Micro-Interface Board, Type “A” (Electronics Enclosure) 100-0117 Microcontroller Board (Electronics Enclosure) 100-0136 Keypad Board (Display Interface, Electronics Enclosure door) 100-0138 Host Controller Board (Display Interface, Electronics Enclosure door) 100-1534 Termination Board (Hi-Temp) (Electronics Enclosure) 100-1662...

  • Page 258: Oven Heater Spare Parts

    Ordering a Hard Copy of the Analyzer Operator’s Guide To order a hard copy of the analyzer Operator’s Guide and the entire Documentation Package, use the Part Number below: Part No. Description 903-8765 Model 920 Multi-Gas Analyzer Operator’s Guide 6-10 | Model 920 Multi-Gas Analyzer...

  • Page 259: Chapter 7 Glossary

    GLOSSARY User Interface Abbreviations This listing describes all of the screen titles and characters displayed on the User Interface. Flow Control modes are displayed on the upper-left line. Complete details of all screen titles, messages, and abbreviations are described under “Working in the RUN / CFG Operating Modes” and “Working in the CAL Operating Mode”...

  • Page 260: Abbreviations And Terms Used In This Manual

    Purgeable Deluxe analyzer (General Purpose and Division 2) proportional, integral, differential photomultiplier tube resistance temperature device Sample Conditioning Unit SPDT single pole double throw SRAM static random access memory solid-state relay sulfur knock out (sulfur condenser) Explosion-proof 7-2 | Model 920 Multi-Gas Analyzer...

  • Page 261: Appendix A - Drawings

    APPENDIX A – DRAWINGS This appendix contains drawings that are not included in the main body of this manual.  If your Documentation Package includes “Final As-Built” (job-specif- ic) drawings, use those for installation and maintenance/diagnostic NOTE purposes in place of similar “example” drawings in this manual. Appendix A –...

  • Page 262: Ribbon Cable Interconnect (Wx-102836

    Ribbon Cable Interconnect (WX-102836) A-2 | Model 920 Multi-Gas Analyzer...

  • Page 263: Gp Lower Enclosure To Electronics Wiring, Ce Analyzers (Wx-102810

    GP Lower Enclosure to Electronics Wiring, CE Analyzers (WX-102810) Appendix A – Drawings | A-3...

  • Page 264: Heater And Sensor Wiring, Gp/Div 2 Analyzers (Wx-102851

    Heater and Sensor Wiring, GP/Div 2 Analyzers (WX-102851) A-4 | Model 920 Multi-Gas Analyzer...

  • Page 265: Heater And Sensor Wiring, Ce/Zone 1 Analyzers (Wx-102852

    Heater and Sensor Wiring, CE/Zone 1 Analyzers (WX-102852) Appendix A – Drawings | A-5...

  • Page 266: Lower Cabinet Wiring, Ce/Gp Analyzers, 120V (100-1341-3

    Lower Cabinet Wiring, CE/GP Analyzers, 120V (100-1341-3) A-6 | Model 920 Multi-Gas Analyzer...

  • Page 267: Lower Cabinet Wiring, Ce/Gp Analyzers, 240V (100-1342-3

    Lower Cabinet Wiring, CE/GP Analyzers, 240V (100-1342-3) Appendix A – Drawings | A-7...

  • Page 268: Signal Wiring, Pd/Gp/Div 2/Ce/Zone 1 Analyzers (Wx-102815

    Signal Wiring, PD/GP/Div 2/CE/Zone 1 Analyzers (WX-102815) A-8 | Model 920 Multi-Gas Analyzer...

  • Page 269: Wiring Diagram, All Seals, Zone 1 Analyzers (100-1343-10

    Wiring Diagram, All Seals, Zone 1 Analyzers (100-1343-10) Appendix A – Drawings | A-9...

  • Page 270: And 5V Power Supply Dc Wiring, Gp/Div 2/Ce/Zone 1 Analyzers (Wx-102811

    ± 15V and 5V Power Supply DC Wiring, GP/Div 2/CE/Zone 1 Analyzers (WX-102811) A-10 | Model 920 Multi-Gas Analyzer...

  • Page 271: Power Supply Dc Wiring, Ce/Zone 1 Analyzers (Wx-102812

    24V Power Supply DC Wiring, CE/Zone 1 Analyzers (WX-102812) Appendix A – Drawings | A-11...

  • Page 272: Communications Cable Wiring (300-9480

    RS-232 Communications Cable Wiring (300-9480) A-12 | Model 920 Multi-Gas Analyzer...

  • Page 273: Rs-232/Rs-485 Module Wiring, Ce/Zone 1 & Gp/Div 2 Analyzers (100-2185

    RS-232/RS-485 Module Wiring, CE/Zone 1 & GP/Div 2 Analyzers (100-2185) Appendix A – Drawings | A-13...

  • Page 274: Microcontroller Board (100-0117

    Microcontroller Board (100-0117) A-14 | Model 920 Multi-Gas Analyzer...

  • Page 275: Host Controller Board (Display Interface) (100-0138

    Host Controller Board (Display Interface) (100-0138) Appendix A – Drawings | A-15...

  • Page 276: Model 9Xx-Series Analyzer Type 200 Disconnect Enclosure Details

    Model 9xx-Series Analyzer Type 200 Disconnect Enclosure Details A-16 | Model 920 Multi-Gas Analyzer...

  • Page 277: Supplemental Information

    SUPPLEMENTAL INFORMATION This section consists of information and documents that are not part of the main manual, but which describe and illustrate installation, operation, layout, and maintenance procedures for non-standard or optional equip- ment – and derivative analyzer models – that make up your analyzer and its sample system.
  • Page 278 This page intentionally left blank. S-2 | Model 920 Multi-Gas Analyzer...

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