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Agilent Technologies 7000 Triple Quadrupole GC/MS Maintenance Manual

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Agilent 7000 Triple
Quadrupole GC/MS
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Troubleshooting and
Maintenance Manual
Agilent Technologies

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Summary of Contents for Agilent Technologies 7000 Triple Quadrupole GC/MS

  • Page 1 Agilent 7000 Triple Quadrupole GC/MS System Troubleshooting and Maintenance Manual Agilent Technologies...
  • Page 2 Notices Warranty Safety Notices © Agilent Technologies, Inc. 2009 No part of this manual may be reproduced in The material contained in this docu- any form or by any means (including elec- ment is provided “as is,” and is sub-...

  • Page 3: Table Of Contents

    Contents Introduction Abbreviations Used The 7000 Series Triple Quad GC/MS Triple Quad GC/MS Hardware Description Important Safety Warnings Hydrogen Safety Safety and Regulatory Certifications Intended Use Cleaning/Recycling the Product Liquid Spills Moving or Storing the MS General Troubleshooting Troubleshooting Tips and Tricks General Symptoms Chromatographic Symptoms Mass Spectra General Symptoms...
  • Page 4 CI Troubleshooting Common CI-Specific Problems Troubleshooting Tips and Tricks Air Leaks Pressure-Related Symptoms Signal-Related Symptoms Tuning-Related Symptoms General Maintenance Before Starting Maintaining the Mainframe Maintaining the Vacuum System Maintaining the Analyzers and Collision Cell Maintaining the GC/MS Interface Maintaining the Electronics CI Maintenance To Minimize Foreline Pump Damage from Ammonia To Replace the Methane/Isobutane Gas Purifier...
  • Page 5 Turbo Pump Analyzer Chambers Side Plates Vacuum Seals Foreline Gauge Turbo Pump and Fan Calibration Valve and Vent Valve Analyzers and Collision Cell Overview EI Ion Source CI Ion Source Filaments Other Source Elements Quadrupole Mass Filters Post- and Pre-Filters Collision Cell Detector Analyzer Heaters and Radiators...
  • Page 6 Electronics Module Bus board PLX card LAN/MS Control Card (Smartcard 4) Power Supplies Back Panel Connectors Interfacing to External Devices Replacement Parts To Order Parts Electronics Local Control Panel Vacuum System Analyzer EI GC/MS Interface Consumables and Maintenance Supplies Additional CI Parts Troubleshooting and Maintenance Manual...
  • Page 7 The 7000 Triple Quad GC/MS system consists of a 7890A gas chromatograph (GC) and a 7000 triple quadrupole mass spectrometer (MS). This section provides general information about the 7000 Series Triple Quad GC/MS, including a hardware description, general safety warnings, and hydrogen safety information. Agilent Technologies...

  • Page 8: Introduction

    Introduction Abbreviations Used The abbreviations in Table 1 are used in discussing this product. They are collected here for convenience. Table 1 Abbreviations Abbreviation Definition Alternating current Automatic liquid sampler Bromofluorobenzene (calibrant) Collision cell Chemical ionization Collision induced dissociation Direct current DFTPP Decafluorotriphenylphosphine (calibrant) Direct insertion probe...
  • Page 9 Introduction Table 1 Abbreviations (continued) Abbreviation Definition Multiple reaction monitoring Mass spectrometer Front quadrupole Rear quadrupole Negative chemical ionization Octafluoronaphthalene (sample) Positive chemical ionization PFDTD Perfluoro-5,8-dimethyl-3,6,9-trioxydodecane (calibrant) PFTBA Perfluorotributylamine (calibrant) Triple quadrupole Quad Quadrupole mass filter Radio frequency RFPA Radio frequency power amplifier Torr Unit of pressure, 1 mm Hg Turbo...

  • Page 10: The 7000 Series Triple Quad Gc/Ms

    Introduction The 7000 Series Triple Quad GC/MS The 7000 Series Triple Quad GC/MS is a standalone capillary GC detector for use with the Agilent 7890A Series gas chromatograph. The Triple Quad MS features: • One split flow turbomolecular vacuum pump •...
  • Page 11 Introduction In this manual, the term “CI MS” refers to the 7000 Series Triple Quad GC/MS CI source system. It also applies, unless otherwise specified, to the flow modules for these instruments. The 7000 Series Triple Quad GC/MS CI source system upgrade kit adds to the 7000 Triple Quad MS: •...

  • Page 12: Triple Quad Gc/Ms Hardware Description

    Introduction Triple Quad GC/MS Hardware Description Figure 1 is an overview of a typical 7000 Triple Quad GC/MS system. 7890A GC 7000 Series Triple Quad MS Local control panel MS power switch Tray GC power switch Figure 1 7000 Triple Quad MS Troubleshooting and Maintenance Manual...

  • Page 13: Important Safety Warnings

    Introduction Important Safety Warnings There are several important safety notices to always keep in mind when using the MS. Many internal parts of the MS carry dangerous voltages If the MS is connected to a power source, even if the power switch is off, potentially dangerous voltages exist on: •...
  • Page 14 Introduction Many parts are dangerously hot Many parts of the GC/MS operate at temperatures high enough to cause serious burns. These parts include, but are not limited to the: • Inlet • Oven and its contents • Valve box • Detectors •...

  • Page 15: Hydrogen Safety

    Introduction Hydrogen Safety The use of hydrogen as a GC carrier gas is potentially dangerous. WA R N I N G When using hydrogen (H ) as the carrier gas or fuel gas, be aware that hydrogen WA R N I N G gas can flow into the GC oven and create an explosion hazard.
  • Page 16 Introduction • Accumulation of hydrogen in the GC oven and subsequent combustion (See your GC documentation and the label on the top edge of the GC oven door.) • Accumulation of hydrogen in the MS and subsequent combustion Hydrogen accumulation in an MS The MS cannot detect leaks in inlet and/or detector gas streams.
  • Page 17 Introduction Table 2 Hydrogen accumulation mechanisms (continued) Mechanism Results GC off A GC can be shut down deliberately. It can also be shut down accidentally by an internal or external failure. Different GCs react in different ways. If a 7890A GC equipped with Electronic Pressure Control (EPC) is shut off, the EPC stops the flow of carrier gas.
  • Page 18 Introduction Precautions Take the following precautions when operating a GC/MS system with hydrogen carrier gas. Equipment precautions You MUST make sure the top thumbscrew on the front analyzer side plate and the WA R N I N G top thumbscrew on the rear analyzer side plate are both fastened finger-tight. Do not overtighten the thumbscrews;...
  • Page 19 Introduction • Turn off the hydrogen at its source every time you vent the MS (do not heat the capillary column without carrier gas flow). • Turn off the hydrogen at its source every time shutoff valves in the MS are closed (do not heat the capillary column without carrier gas flow).

  • Page 20: Safety And Regulatory Certifications

    The 7000 Series Triple Quad GC/MS is designed and manufactured under a quality system registered to ISO 9001. Information The Agilent Technologies 7000 Series Triple Quad GC/MS meets the following IEC (International Electrotechnical Commission) classifications: Equipment Class I, Laboratory Equipment, Installation Category II, and Pollution Degree This unit has been designed and tested in accordance with recognized safety standards and is designed for use indoors.
  • Page 21 Failure to comply with these precautions violates safety standards of design and the intended use of the instrument. Agilent Technologies assumes no liability for the customer’s failure to comply with these requirements.
  • Page 22 Make sure that all peripheral devices are also certified. Make sure that appropriate cables are used to connect the device to peripheral equipment. Consult your equipment dealer, Agilent Technologies, or an experienced technician for assistance. Changes or modifications not expressly approved by Agilent Technologies could void the user’s authority to operate the equipment.

  • Page 23: Intended Use

    Introduction Intended Use Agilent products must only be used in the manner described in the Agilent product user guides. Any other use may result in damage to the product or personal injury. Agilent is not responsible for any damages caused, in whole or in part, by improper use of the products, unauthorized alterations, adjustments or modifications to the products, failure to comply with procedures in Agilent product user guides, or use of the products in violation...
  • Page 24 Introduction Troubleshooting and Maintenance Manual...

  • Page 25: General Troubleshooting

    See the other chapters in this manual for more information. If the material in this chapter and in the online help proves insufficient to help you diagnose a problem, contact your Agilent Technologies service representative. Agilent Technologies...

  • Page 26: Troubleshooting Tips And Tricks

    General Troubleshooting Troubleshooting Tips and Tricks Rule 1: “Look for what has been changed.” Many problems are introduced accidentally by human actions. Every time any system is disturbed, there is a chance of introducing a new problem. • If the MS was just pumped down after maintenance, suspect air leaks or incorrect assembly.

  • Page 27: General Symptoms

    General Troubleshooting General Symptoms This section describes symptoms you might observe when first turning on the GC/MS system. All of these symptoms would prevent operation of the system. GC does not turn on Nothing happens when the GC is switched on. The GC fans do not turn on and the keypad display does not light.
  • Page 28 General Troubleshooting MS turns on but then the foreline pump shuts off The MS will shut down both the foreline pump and the high vacuum pump if the system fails to pump down correctly. This is usually because of a large air leak: either the side plate has not sealed correctly or the vent valve is still open.

  • Page 29: Chromatographic Symptoms

    General Troubleshooting Chromatographic Symptoms These are symptoms you may observe in the chromatograms generated by data acquisition. In general, these symptoms do not prevent you from operating your GC/MS system. They indicate, however, that the data you are acquiring may not be the best data obtainable. These symptoms can be caused by instrument malfunctions but are more likely caused by incorrect chromatographic technique.
  • Page 30 General Troubleshooting • Calibration valve is not working correctly • Bad signal cable connection • Filament has failed or is not connected correctly • Bad ion source wiring connection • Bad detector wiring connection • Failed electron multiplier horn Peaks are tailing •...
  • Page 31 General Troubleshooting Peaks have split tops • Bad injection technique • Injection is too large Baseline is rising • Column bleed • Other contamination Baseline is high • Column bleed • Other contamination • Electron multiplier voltage is too high Baseline is falling A falling baseline indicates contamination is being swept away.
  • Page 32 General Troubleshooting Baseline wanders • Insufficient carrier gas supply pressure* • Malfunctioning flow or pressure regulator* • Intermittent leak in the GC inlet* * This could cause a fault condition in the GC that would prevent the GC from operating. Retention times for all peaks drift –...
  • Page 33 General Troubleshooting • Excessive pressure in the front or rear chamber • Dirty ion source • Air leaks between chambers • Poor filament operation • Detector (HED electron multiplier) is not working correctly • Incorrect mass filter polarity • Collision cell voltage * This could cause a fault condition in the GC that would prevent the GC from operating.

  • Page 34: Mass Spectra General Symptoms

    General Troubleshooting Mass Spectra General Symptoms This section describes symptoms you might observe in mass spectra. Some of these symptoms will appear in the mass spectra of samples. Others you will observe only in a tune report. Some of these symptoms have causes that can be corrected by the operator.
  • Page 35 General Troubleshooting High background • Pressure in the analyzer chamber is too high • Air leak • Contamination Mass assignments are incorrect (scan mode only) Small shape changes at the top of the mass peaks can cause 0.1 m/z shifts in mass assignments.
  • Page 36 General Troubleshooting • Electron multiplier is nearing the end of it useful lifetime • Ground loop problems Relative abundance of m/z 502 is low or nonexistent Autotune should give an m/z relative abundance greater than 1%. The relative abundance of m/z 502 can, however, vary a great deal depending on column flow, ion source temperature, and other variables.
  • Page 37 General Troubleshooting High mass sensitivity is poor This refers to a condition where the absolute abundance at the upper end of the mass range is poor. Absolute abundance should not be confused with the relative abundance (percentage) of m/z 502 to m/z 69. Sensitivity at high masses can be excellent even if the relative abundance of m/z 502 is low.

  • Page 38: Pressure Symptoms

    General Troubleshooting Pressure Symptoms This section describes unusual pressure readings and their possible causes. At typical column flow rates (0.5 to 2.0 mL/minute), the foreline pressure will be approximately 16 to 18 mTorr. The analyzer chamber pressure will be approximately 1 × 10 to 2 ×...
  • Page 39 General Troubleshooting Foreline pressure is too low If the pressures you observe are below 20 mTorr, check for the following: • Column (carrier gas) flow is too low • Column plugged or crushed by an overtightened nut • Collision gas flows are too low •...

  • Page 40: Temperature Symptoms

    General Troubleshooting Temperature Symptoms The MS has four heated zones: • Ion source • Front and rear mass filters • GC/MS interface Each heated zone has a heater and temperature sensor. The ion source and mass filters are powered and controlled by the MS. The GC/MS interface is powered and controlled by the GC.
  • Page 41 General Troubleshooting • MS electronics are not working correctly * This will cause an error message. GC/MS interface will not heat up • Incorrect setpoint(s) • Setpoint entered in wrong heated zone • GC/MS interface has not had enough time to reach temperature setpoint •...

  • Page 42: Common Types Of Errors

    General Troubleshooting Common Types of Errors Sometimes a problem in your MS will cause an error message to appear in the MassHunter Workstation software. Some error messages appear only during tuning. Other messages may appear during tuning or data acquisition. Some error messages are “latched.”...
  • Page 43 General Troubleshooting Difficulty with the HED supply The only time this error occurs is if the output of the supply cannot get to its destination (the HED). • Large peak, such as the solvent peak, eluted while the analyzer was on •...
  • Page 44 General Troubleshooting Lens supply fault • Electrical short in the analyzer • MS cannot maintain the voltage setpoint • MS electronics are not working correctly Log amplifier ADC error • MS electronics are not working correctly No peaks found • Emission current was set to 0 •...
  • Page 45 General Troubleshooting • Mass filter (quad) temperature sensor is open (either front or rear quad) • Mass filter (quad) temperature sensor is shorted (either front or rear quad) • No heater voltage (heater fuse has probably failed) • Heater voltage is too low •...
  • Page 46 General Troubleshooting There is no emission current • Check tune file to be certain that emission current is not = 0 • Filament is not connected properly; try the other filament • Filament has failed; try the other filament • MS electronics are not working correctly There is not enough signal to begin tune •...

  • Page 47: Air Leaks

    General Troubleshooting Air Leaks Air leaks are a problem for any instrument that requires a vacuum to operate. Leaks are generally caused by vacuum seals that are damaged or not fastened correctly. Symptoms of leaks include: • Higher than normal analyzer chamber pressure or foreline pressure •...

  • Page 48: Contamination

    General Troubleshooting Contamination Contamination is usually identified by excessive background in the mass spectra. It can come from the GC or from the MS. The source of the contamination can sometimes be determined by identifying the contaminants. Some contaminants are much more likely to originate in the GC. Others are more likely to originate in the MS.
  • Page 49 General Troubleshooting Table 3 Common contaminants Ions (m/z) Compound Possible source 18, 28, 32, 44 or 14, 16 O, N , CO or N, O Residual air and water, air leaks, outgassing from Vespel ferrules 31, 51, 69, 100, 119, 131, PFTBA and related ions PFTBA (tuning compound) 169, 181, 214, 219, 264, 376,...
  • Page 50 General Troubleshooting Troubleshooting and Maintenance Manual...
  • Page 51 Signal-Related Symptoms Tuning-Related Symptoms This chapter outlines the troubleshooting of Agilent 7000 Series Triple Quad GC/MSs equipped with the chemical ionization (CI) source. Most of the troubleshooting information in the previous chapter also applies to CI Triple Quads. Agilent Technologies...

  • Page 52: Ci Troubleshooting

    CI Troubleshooting Common CI-Specific Problems Because of the added complexity of the parts required for CI, there are many potential problems added. By far the greatest number and most serious problems with CI are associated with leaks or contamination in the reagent gas introduction system.

  • Page 53: Troubleshooting Tips And Tricks

    CI Troubleshooting Troubleshooting Tips and Tricks Rule 1: “Look for what has been changed.” Many problems are introduced accidentally by human actions. Every time any system is disturbed, there is a chance of introducing a new problem. • If the MS was just pumped down after maintenance, suspect air leaks or incorrect assembly.

  • Page 54: Air Leaks

    CI Troubleshooting Air Leaks How do I know if I have an air leak? Large air leaks can be detected by vacuum symptoms: loud gurgling noise from the foreline pump, inability of the turbo pump to reach 95% speed, or, in the case of smaller leaks, high pressure readings on the high vacuum gauge controller.
  • Page 55 CI Troubleshooting There should not be any peak visible at m/z 32 (O ). This almost always indicates an air leak. Figure 2 Looking for air leaks Special NCI notes Since NCI is so extremely sensitive, air leaks that are not detectable in EI or PCI can cause sensitivity problems in NCI.
  • Page 56 CI Troubleshooting Check for tightness of seals at GC inlet and interface column nuts. Ferrules for capillary columns often loosen after several heat cycles. Do not overtighten the interface nut. If any of the fittings inside the flow module (VCR fittings) were loosened and then retightened, the gasket must be replaced.
  • Page 57 CI Troubleshooting CI ion source Gas A (methane) supply Gas A Mass select valve flow controller Shutoff valve Gas B Calibration (other gas) valve GC/MS supply interface Restrictor Gas B select valve Calibration vial GC column Figure 3 Schematic of CI flow control module Table 4 Flow module valve state diagram Result...

  • Page 58: Pressure-Related Symptoms

    CI Troubleshooting Pressure-Related Symptoms The following symptoms are all related to high vacuum pressure. Each symptom is discussed in more detail in the following pages. The mass flow controller is calibrated for methane and the high vacuum gauge controller is calibrated for nitrogen, so these measurements are not accurate in absolute terms (Table 5).
  • Page 59 For the standard foreline pump, replace the pump oil. If that does not help, or for the dry foreline pump, it may be necessary to replace the pump. Contact your local Agilent Technologies Customer Engineer. The turbo pump is not working properly Check the pump speed.
  • Page 60 CI Troubleshooting High pressure with reagent gas flow The reagent gas flow rate is too high On the flow controller, turn down reagent gas flow as appropriate. Verify that reagent ion ratios are correct. Air leak Run Methane Pretune. See the Operation Manual.
  • Page 61 CI Troubleshooting Pressure does not change when reagent flow is changed The reagent gas regulator is closed Check and, if necessary, open the reagent gas regulator. The reagent gas regulator is set to the wrong pressure Set the reagent gas regulator to 10 psi (70 kPa) for methane or to 3 to 10 psi (20 to 70 kPa) for isobutane or ammonia.

  • Page 62: Signal-Related Symptoms

    CI Troubleshooting Signal-Related Symptoms This section describes symptoms related to the signal. The symptom may be too much signal, too little signal, a noisy signal, or an incorrect signal. Signal-related symptoms are generally observed during tuning but may also be observed during data acquisition.
  • Page 63 CI Troubleshooting If MS was recently switched from EI to CI • Interface tip seal not installed • No reagent gas flow • Analyzer not sealed (big air leak) • Wrong tune file loaded or tune file corrupted • Ion source not assembled or connected correctly •...
  • Page 64 CI Troubleshooting No or low reagent gas signal If you have just installed the CI ion source and have an air leak or large amounts of water in the system and have run one or more autotunes, the ion source is probably dirty now.
  • Page 65 CI Troubleshooting The signal cable is not connected. Check and, if necessary, reconnect the signal cable. The filament or filament support is shorted to the ion source body or repeller. Inspect the filament. If necessary, realign the filament support arms. The electron inlet hole is blocked.
  • Page 66 CI Troubleshooting No or low PFDTD signal, but reagent ions are normal You are using any reagent gas but methane in PCI. Switch to methane. Wrong or corrupted tune file loaded Check your tune file. No PFDTD in the calibrant vial Inspect the calibration vial on the back of the flow controller.
  • Page 67 CI Troubleshooting Excessive noise or low signal-to-noise ratio The GC inlet needs maintenance. Refer to the GC manual. The CI ion source is dirty. Clean the ion source. See the Agilent 7000 Series Triple Quad GC/MS Operation Manual for more information. Poor vacuum Check the pressure on the high vacuum gauge controller.
  • Page 68 CI Troubleshooting Large peak at m/z 19 If the abundance of the peak at m/z 19 is more than half abundance of the peak at m/z 17, then there is probably too much water in the system. The system was not baked out sufficiently after it was last vented. Bake out the system as described in Chapter “General Maintenance”...
  • Page 69 CI Troubleshooting Peak at m/z 32 A visible peak at m/z 32 in methane pretune often indicates air in the system. Residual air from recent venting — check for water indicated by a large peak at m/z 19. Bake out the system under vacuum to eliminate water. New or dirty reagent gas supply tubing Purge the reagent gas supply lines and flow module for at least 60 minutes.

  • Page 70: Tuning-Related Symptoms

    CI Troubleshooting Tuning-Related Symptoms This section describes symptoms related to tuning. Most symptoms involve difficulties with tuning or with the results of tuning. The following symptoms are covered in this section: • CI ion ratio is difficult to adjust or unstable •...
  • Page 71 CI Troubleshooting Reagent gas ion ratio is difficult to adjust or unstable The interface tip seal is incorrectly placed, damaged, or missing. Inspect the interface tip seal. If necessary, remove and reinstall it to ensure a good seal with the CI ion source. Replace it if it is damaged. Install it if it is missing.
  • Page 72 CI Troubleshooting High electron multiplier voltage The electron multiplier voltage can range from a few hundred volts to 3000 V. If the CI autotune program consistently sets the electron multiplier voltage at or above 2600 V but can still find peaks and complete the tune, it may indicate a problem.
  • Page 73 CI Troubleshooting Cannot complete Autotune Wrong or corrupted tune file Check the tune parameters. The m/z 28/27 ion ratio (for methane) is incorrect. The correct ratio should be between 1.5 and 5.0. If the ion ratio is incorrect, adjust it. See the Operation Manual.
  • Page 74 CI Troubleshooting Peak widths are unstable Wrong or corrupted tune file Check the tune parameters. The CI ion source is dirty. Clean the ion source. See Chapter “CI Maintenance” on page 123 for more information. Air leak Run Methane Pretune (in PCI). A visible peak at m/z 32 indicates air in the system.

  • Page 75: General Maintenance

    Agilent 7000 Series Triple Quadrupole GC/MS Troubleshooting and Maintenance Manual General Maintenance Before Starting Maintaining the Mainframe Maintaining the Vacuum System Maintaining the Analyzers and Collision Cell Maintaining the GC/MS Interface Maintaining the Electronics Agilent Technologies...

  • Page 76: Before Starting

    General Maintenance Before Starting For your safety, read all of the information in this introduction before performing any maintenance tasks. Scheduled maintenance Common maintenance tasks are listed in Table 6. Performing these tasks when scheduled can reduce operating problems, prolong system life, and reduce overall operating costs.
  • Page 77 General Maintenance Tools, spare parts, and supplies Some of the required tools, spare parts, and supplies are included in the GC shipping kit, MS shipping kit, or MS tool kit. You must supply others yourself. Each maintenance procedure includes a list of the materials required for that procedure.
  • Page 78 General Maintenance Never touch these parts while your MS is on. After the MS is turned off, give these WA R N I N G parts enough time to cool before handling them. The GC/MS interface heater is powered by a heated zone on the GC. The interface WA R N I N G heater can be on, and at a dangerously high temperature, even though the MS is off.
  • Page 79 General Maintenance The fluid in the foreline pump also collects traces of the samples being analyzed. All used pump fluid should be considered hazardous and handled accordingly. Dispose of used fluid as specified by your local regulations. When replacing pump fluid, use appropriate chemical-resistant gloves and safety WA R N I N G glasses.

  • Page 80: Maintaining The Mainframe

    General Maintenance Maintaining the Mainframe The mainframe consists of everything that does not fit in the vacuum, analyzer, interface, or electronics categories. To remove the MS covers Materials needed • Screwdriver, Torx T-15 (8710-1622) If you need to remove one of the MS covers (see Figure 4), follow these procedures:...
  • Page 81 General Maintenance To remove the left side panel Open the left side panel Remove the screws holding the cover. To remove the left side cover Remove the front bottom cover. Remove the left side panel. Remove the screws that hold the left side cover in place. Push the cover slightly to the rear to disengage the two right side tabs and then lift it off the MS.
  • Page 82 General Maintenance Top cover Left rear cover Front right analyzer Left side panel window cover Left side cover Front bottom cover Figure 4 MS covers Troubleshooting and Maintenance Manual...
  • Page 83 General Maintenance To move or store the MS Materials needed • Ferrule, blank (5181-3308) • Interface column nut (05988-20066) • Wrench, open-end, 1/4-inch × 5/16-inch (8710-0510) Procedure Make sure the GC/MS interface and the analyzer zones are cool (below 100 °C) WA R N I N G before you vent the MS.
  • Page 84 General Maintenance Vent the MS. See the Agilent 7000 Series Triple Quad GC/MS Operation Manual. Remove the column. Disconnect the collision gas supply tubing. Install a plug on the end of the collision gas tubing that leads into the analyzer chamber. Move the MS away from the GC.
  • Page 85 The MS must remain upright at all times. If you need to ship your MS to another C A U T I O N location, contact your Agilent Technologies service representative for advice about packing and shipping. Troubleshooting and Maintenance Manual...
  • Page 86 General Maintenance To separate/connect the MS and the GC Materials needed • Wrench, open-end, 1/4-inch × 5/16-inch (8710-0510) Separation Make sure the GC/MS interface and the analyzer zones are cool (below 100 °C) WA R N I N G before you vent the MS. A temperature of 100 °C is hot enough to burn skin; always wear cloth gloves when handling analyzer parts.
  • Page 87 General Maintenance Place a column nut with a blank ferrule on the end of the interface. This will help keep contamination out of the MS. Disconnect the GC/MS interface cable. Disconnecting the cable with the GC on can cause a fault condition. Continue to move the MS until you have access to the part requiring maintenance.
  • Page 88 General Maintenance Slide the MS to its regular position next to the GC. Be careful not to damage the GC/MS interface as it passes into the GC. Make sure the end of the GC/MS interface extends into the GC oven. The foreline pump may be located on the floor or on the lab bench next to or behind the MS.
  • Page 89 General Maintenance To refill/purge the EI calibration vial Materials needed • PFTBA (05971-60571) Refill Stop any tuning or data acquisition. Turn off the MS electronics. Remove the analyzer window cover. See “To remove the MS covers” page 80. Turn the calibration vial collar counterclockwise to loosen it (Figure Do not remove the collar.
  • Page 90 General Maintenance Turn the collar clockwise to tighten it. The collar should be snug but not overly tight. Do not use a tool to tighten the collar. It does not require that much force. 10 Reinstall the analyzer window cover. 11 In Instrument Control panel, select the MS Tune icon to display the GC-QQQ Tune dialog box.
  • Page 91 General Maintenance To remove/reinstall the calibration and vent valve assembly Removal Materials needed • Screwdriver, Torx T-15 (8710-1622) If you are using hydrogen as a carrier gas, do not start carrier gas flow until the MS WA R N I N G has been pumped down.
  • Page 92 General Maintenance Reinstallation Materials needed • Calibration valve (G3170-60204) • O-ring for calibration valve (0905-1217) • PFTBA (05971-60571) • Screwdriver, Torx T-15 (8710-1622) Remove the old valve assembly. See “To remove/reinstall the calibration and vent valve assembly” on page 91 and Figure Be sure the valve O-ring is in place.

  • Page 93: Maintaining The Vacuum System

    General Maintenance Maintaining the Vacuum System Periodic maintenance As listed in Table 6, some maintenance tasks for the vacuum system must be performed periodically. These include: • Checking the foreline pump fluid (every week) • Checking the calibration vial (every 6 months) •...
  • Page 94 General Maintenance To remove/install the ion vacuum gauges Each MS contains two ion vacuum gauges; one for the analyzer chamber pressure and one for the foreline pump entrance. Make sure the GC/MS interface and the analyzer zones are cool (below 100 °C) WA R N I N G before you vent the MS.
  • Page 95 General Maintenance Removal, analyzer chamber gauge Vent the MS. See the Agilent 7000 Series Triple Quad GC/MS Operation Manual. The chamber ion gauge is under the collision cell area. See Figure Separate the MS from the GC. See “To separate/connect the MS and the GC”...
  • Page 96 General Maintenance Wingnut Cable to analyzer chamber pressure gauge Cable to forepump pressure gauge Figure 8 Ion vacuum gauge cables Troubleshooting and Maintenance Manual...
  • Page 97 General Maintenance To check and add foreline pump oil This procedure describes the standard foreline pump (Pfeiffer Duo 2.5). The higher flow pump (Edwards RV5) is similar. Materials needed • Foreline pump oil (6040-0834) • Funnel (9301-6461) • Hex key, 5-mm, to remove drain plug (8710-1838) •...
  • Page 98 General Maintenance Add pump fluid until the oil level in the window is near, but not above, the upper line. Reinstall the fill cap. Pump down the MS. See the Agilent 7000 Series Triple Quad GC/MS Operation Manual. Oil level lines Oil mist filter Fill cap Drain plug...
  • Page 99 General Maintenance To drain/refill the foreline pump Materials needed • Book or other solid object approximately 5 cm thick • Container for catching old pump oil, 500 mL • Gloves, oil- and solvent-resistant • Screwdriver, flat-blade, large (8730-0002) • Hex key, 5-mm (8710-1838) •...
  • Page 100 General Maintenance Replace the drain plug after draining the oil. Refill the foreline pump until the oil level is near, but not above, the upper line mark in the sight window. Replace the fill cap. Refill the pump The foreline pump can cause burns if touched when operating. An optional safety WA R N I N G shield will prevent the user from touching it.
  • Page 101 General Maintenance To replace the fan for the turbo pump Procedure Vent the MS. See the Agilent 7000 Series Triple Quad GC/MS Operation Manual. Turn the MS off. Move the MS away from the GC to make the fan accessible. Remove the fan plenum (four screws).
  • Page 102 General Maintenance Screen Wires to extender cable Figure 10 Replacing the turbo pump fan Troubleshooting and Maintenance Manual...
  • Page 103 General Maintenance To lubricate the side plate O-rings Materials needed • Cloths, clean (05980-60051) • Gloves, clean, lint-free • Large (8650-0030) • Small (8650-0029) • Grease, Apiezon L, high-vacuum (6040-0289) The side plate O-rings may require a thin coat of grease to ensure a good vacuum seal.
  • Page 104 General Maintenance Do not use anything except the recommended vacuum grease. Excess grease can trap C A U T I O N air and dirt. Grease on surfaces of the O-ring other than the exposed surface can trap air, resulting in air spikes during operation. Use a clean, lint-free cloth or glove to wipe away excess grease.
  • Page 105 General Maintenance To lubricate the vent valve O-ring Materials needed • Cloths, clean (05980-60051) • Gloves, clean, lint-free • Large (8650-0030) • Small (8650-0029) • Grease, Apiezon L, high-vacuum (6040-0289) • O-ring, vent valve (0905-1217). Replace if the old O-ring is worn or damaged The vent valve O-ring needs a very thin coat of lubrication to ensure a good vacuum seal and smooth operation.
  • Page 106 General Maintenance Vent valve O-ring Vent valve knob Figure 12 Vent valve O-ring Reinstall the vent valve knob. Be very careful when reinstalling the vent valve knob. It is possible to cross-thread the C A U T I O N knob and damage the threads in the valve body.

  • Page 107: Maintaining The Analyzers And Collision Cell

    General Maintenance Maintaining the Analyzers and Collision Cell Scheduling None of the analyzer components requires periodic maintenance. Some tasks, however, must be performed when MS behavior indicates they are necessary. These tasks include: • Cleaning the ion source • Replacing filaments •...
  • Page 108 General Maintenance Some parts can be damaged by electrostatic discharge The wires, contacts, and cables connected to the analyzer components can carry electrostatic discharges (ESD) to the electronics boards to which they are connected. This is especially true of the mass filter (quadrupole) contact wires, which can conduct ESD to sensitive components on the quadrupole board.
  • Page 109 General Maintenance To remove/reinstall the heater/sensor assembly of the ion source Materials needed • Gloves, clean, lint-free • Large (8650-0030) • Small (8650-0029) • Hex ball driver, 1.5 mm (8710-1570) • Hex ball driver, 2.0 mm (8710-1804) • Hex nut driver, 5.5 mm (8710-1220) Removal The analyzer, GC/MS interface, and other components in the analyzer chamber WA R N I N G...
  • Page 110 General Maintenance Separate the source heater assembly from the source body by removing the two screws. The source heater assembly includes the source heater, repeller, and related parts. (See Figure 13.) Disassemble the repeller assembly by removing the repeller nut, washers, ceramic insulators and repeller.
  • Page 111 General Maintenance Reinstallation Unpack the new source heater assembly (G3170-60177). The heater, temperature sensor, and heater block are already assembled. Always wear clean gloves to prevent contamination when working in the analyzer C A U T I O N chamber. Reinstall the repeller, repeller insulators, washer, and repeller nut (Figure 13).
  • Page 112 General Maintenance To remove/reinstall the heater and sensor for the mass filter Materials needed • Gloves, clean, lint-free • Large (8650-0030) • Small (8650-0029) • Hex ball driver, 1.5 mm (8710-1570) • Hex ball driver, 2.0 mm (8710-1804) Removal The analyzers, GC/MS interface, and other components in the analyzer chamber WA R N I N G operate at very high temperatures.
  • Page 113 General Maintenance Do not touch the mass filter contact leads. This could cause ESD damage to the C A U T I O N quadrupole board. Reinstallation Unpack the new mass filter heater assembly (Figure 14). The heater, temperature sensor, and heater block are already assembled. Install the heater assembly on top of the mass filter radiator using the two screws.
  • Page 114 General Maintenance Heater/sensor assembly Front analyzer shown; rear analyzer is similar. Mass filter radiator Figure 14 Mass filter heater and sensor Troubleshooting and Maintenance Manual...

  • Page 115: Maintaining The Gc/Ms Interface

    General Maintenance Maintaining the GC/MS Interface The GC/MS interface requires no periodic maintenance Rarely, the heater cartridge in the GC/MS interface fails. In those cases, it is necessary to replace the heater and sensor. This section contains procedures for removing the heater and sensor and installing new ones. See Figure Insulation Analyzer chamber...
  • Page 116 General Maintenance To remove/reinstall the GC/MS interface heater and sensor Materials needed • Screwdriver, Torx T-15 (8710-1622) • Hex driver, 1.5 mm (8710-1570) Removal Vent the MS. See the Agilent 7000 Series Triple Quad GC/MS Operation Manual. Make sure you turn off the GC/MS interface heater. This heater is controlled and powered by the GC.
  • Page 117 General Maintenance Installing a new heater and sensor in a damaged heater sleeve will result in poor C A U T I O N performance of the heated zone and could reduce the lifetime of the new parts. Heater clamp Setscrew Heater Temperature sensor...
  • Page 118 General Maintenance Slide the new heater and temperature sensor into the heater sleeve (Figure 16). Reinstall the setscrew. Slide the heater sleeve onto the GC/MS interface. Align the heater sleeve so the screws are on top. Tighten the screws evenly. Slide the insulation onto the GC/MS interface.

  • Page 119: Maintaining The Electronics

    Electronic components The primary fuses can be replaced by the operator. All other maintenance of the electronics should be performed by your Agilent Technologies service representative. Improper use of these procedures could create a serious safety hazard. Improper use...
  • Page 120 General Maintenance ground. If that is not possible, it should be connected to a conductive (metal) part of the assembly being worked on, but to electronic components, exposed wires or traces, or pins on connectors. Take extra precautions, such as a grounded antistatic mat, if you must work on components or assemblies that have been removed from the MS.
  • Page 121 General Maintenance To replace the primary fuses Materials needed • Fuse, 8 A, time-delay slow blow, (2110-0969) – 2 required • Fuse, 12.5 A, time-delay slow blow, (2110-1398) – 2 required • Screwdriver, flat-blade (8730-0002) The most likely cause of failure of the primary fuses is a problem with the foreline pump.
  • Page 122 General Maintenance Troubleshooting and Maintenance Manual...
  • Page 123 To Replace the Methane/Isobutane Gas Purifier To Clean the Reagent Gas Supply Lines To Refill the CI Calibrant Vial This chapter describes maintenance procedures and requirements that are unique to a 7000 Series Triple Quad GC/MS equipped with the Chemical Ionization hardware. Agilent Technologies...

  • Page 124: Ci Maintenance

    CI Maintenance To Minimize Foreline Pump Damage from Ammonia Air ballasting for an hour every day removes most of the ammonia from the pump oil. This will greatly increase the life of the pump. Only perform this procedure if the pump is at normal operating temperature. The water C A U T I O N vapor in air can cause condensation of the ammonia at the ballast valve if the pump is cold.

  • Page 125: To Replace The Methane/Isobutane Gas Purifier

    CI Maintenance To Replace the Methane/Isobutane Gas Purifier Materials needed • Methane/Isobutane gas purifier (G1999-80410) • Front ferrule for 1/8-inch tubing (5180-4110) • Rear ferrule for 1/8-inch tubing (5180-4116) • Tubing cutter (8710-1709) The methane/isobutane gas purifier needs to be replaced after four tanks of reagent gas.

  • Page 126: To Clean The Reagent Gas Supply Lines

    CI Maintenance To Clean the Reagent Gas Supply Lines Materials needed • Clean, dry nitrogen • Heat gun • Tubing cutter (8710-1709) Procedure If the reagent gas lines become contaminated, they can be cleaned. Disconnect the reagent gas tubing from the gas supply, the gas purifier, and the MS.

  • Page 127: To Refill The Ci Calibrant Vial

    CI Maintenance To Refill the CI Calibrant Vial Materials needed • PFDTD calibrant (8500-8510) Procedure Set the reagent gas flow to Gas Off. Vent the MS. Remove the capillary column from the GC/MS interface. Pull the MS away from the GC to expose the calibration vial and valve. See page Loosen the collar holding the calibration vial in place.
  • Page 128 CI Maintenance After removing the calibrant vial, you must purge the calibration valve. Failure to do so C A U T I O N will result in severe contamination of the ion source and damage to the filament and electron multiplier. Calibration valve Collar Calibration vial...
  • Page 129 Vacuum System Components Common Vacuum System Problems Foreline Pump Turbo Pump Analyzer Chambers Side Plates Vacuum Seals Foreline Gauge Turbo Pump and Fan Calibration Valve and Vent Valve This chapter describes components of the 7000 Triple Quad GC/MS vacuum system. Agilent Technologies...

  • Page 130: Vacuum System

    Vacuum System Overview The vacuum system creates the high vacuum (low pressure) required for the GC/MS to operate. Without the vacuum, the molecular mean free path would be very short and ions would collide with air molecules before they could reach the detector.

  • Page 131: Vacuum System Components

    Vacuum System Vacuum System Components The parts of the vacuum system are: • Foreline (rough) pump • High-vacuum turbo pump • Front and rear analyzer chambers • Collision cell cover • Side plates (analyzer doors), and front and rear end plates •...

  • Page 132: Common Vacuum System Problems

    Vacuum System Common Vacuum System Problems Air leak symptoms The most common problems associated with any vacuum system are air leaks. Symptoms of air leaks include: • Loud gurgling noise from the foreline pump (very large leak) • Inability of the turbo pump to reach 95% speed •...

  • Page 133: Foreline Pump

    Vacuum System Foreline Pump The foreline pump reduces the pressure in the analyzer chamber so the high-vacuum pump can operate. It also pumps away the gas load from the high-vacuum turbo pump. The foreline pump is connected to the high-vacuum pump by a 130-cm hose called the foreline hose.
  • Page 134 Vacuum System The oil trap supplied with the foreline pump stops only foreline pump oil. It does not WA R N I N G trap or filter out toxic chemicals. If you are using toxic solvents or analyzing toxic chemicals, remove the oil trap. do not use the trap if you are using a CI MS. Install a hose to take the foreline pump exhaust outside or to a fume hood.

  • Page 135: Turbo Pump

    Vacuum System Turbo Pump The 7000 Series Triple Quad has one turbo pump. The turbo pump chambers have screens to keep debris out of the pump. Pump speed is controlled by the turbo controller. Analyzer Chambers The analyzer chambers (Figure 21) are located inside the vacuum manifold.

  • Page 136: Side Plates

    Vacuum System Side Plates The side plates cover the large openings in the side of the manifold. They are attached to the manifold with hinges. The analyzer assemblies are attached to the side plates inside the analyzer chambers. The hinges allow the side plates to swing away from the manifold for easy access to the analyzers.

  • Page 137: Vacuum Seals

    Vacuum System Vacuum Seals Vacuum seals are shown in Figure Several types of Viton elastomer O-ring seals are used to prevent air leaks into the analyzer chamber. All these O-rings, and the surfaces to which they seal, must be kept clean and protected from nicks and scratches. A single hair, piece of lint, or scratch can produce a serious vacuum leak.
  • Page 138 Vacuum System High-voltage feedthrough seal The high-voltage (HED) feedthrough seal is an O-ring that is compressed against the side plate by a threaded collar. Side plate O-ring seal KF seal with internal centering ring (clamp not shown) KF seal with external centering ring (clamp not shown) Compression seal...

  • Page 139: Foreline Gauge

    Vacuum System Foreline Gauge The foreline gauge monitors the pressure (vacuum) at the exit of the turbo pump. The primary function of the foreline gauge is pump control. When the foreline pump has reduced the pressure in the analyzer chamber to below 300 mTorr (0.3 Torr), the turbo pump is automatically switched on.

  • Page 140: Turbo Pump And Fan

    Vacuum System Turbo Pump and Fan The turbo pump is bolted directly to the bottom of the manifold. The main inlet to the turbo pump is under the front analyzer. A secondary inlet is near the ion source. The pump body is a central shaft or cylinder. Sets of small blades (airfoils) radiate from the central shaft.

  • Page 141: Calibration Valve And Vent Valve

    Vacuum System Calibration Valve and Vent Valve Calibration valve A calibration valve (Figure 23 Figure 24) is an electromechanical valve with a vial to hold the tuning compound. When a calibration valve is opened, tuning compound in the vial diffuses into the ion source. The valves are controlled by the MassHunter Workstation software.
  • Page 142 Vacuum System EI calibration valve EI calibration vial Vent valve Figure 23 Triple quad vent valve and EI calibration valve CI calibration valve CI calibration vial Figure 24 CI calibration valve Troubleshooting and Maintenance Manual...
  • Page 143 Vacuum System Vent valve knob O-ring Air passage Valve closed Valve open Valve open too far Figure 25 Vent valve Troubleshooting and Maintenance Manual...
  • Page 144 Vacuum System Troubleshooting and Maintenance Manual...
  • Page 145 Agilent 7000 Series Triple Quadrupole GC/MS Troubleshooting and Maintenance Manual Analyzers and Collision Cell Overview EI Ion Source CI Ion Source Filaments Other Source Elements Quadrupole Mass Filters Post- and Pre-Filters Collision Cell Detector Analyzer Heaters and Radiators Agilent Technologies...

  • Page 146: Overview

    Analyzers and Collision Cell Overview The complete analyzer system is shown in Figure Front analyzer (MS1) Post-filter Collision cell Pre-filter Rear analyzer (MS2) Detector Figure 26 The analyzer system The front analyzer The front analyzer consists of the ion source, the front quadrupole, heaters/sensors, and the post-filter.
  • Page 147 Analyzers and Collision Cell The collision cell The precursor ions selected by the front quadrupole collide with a reaction gas, typically a nitrogen/helium mixture. This generates additional product ions. The pre-filter This device, located on the entrance of the rear analyzer, transfers the remaining precursor ions and the product ions generated in the collision cell to the rear analyzer.

  • Page 148: Analyzers And Collision Cell

    Analyzers and Collision Cell EI Ion Source The EI ion source (Figure 27) operates by electron impact ionization. The sample enters the ion source from the GC/MS interface. Electrons emitted by a filament enter the ionization chamber, guided by a magnetic field. The high-energy electrons interact with the sample molecules, ionizing and fragmenting them.
  • Page 149 Analyzers and Collision Cell Lens insulation Entrance lens Ion focus lens Drawout cylinder Drawout plate Filament Repeller Figure 27 Ion source structure The CI ion source is similar in design, but critical dimensions are different. Do not interchange parts. Troubleshooting and Maintenance Manual...

  • Page 150: Ci Ion Source

    Analyzers and Collision Cell CI Ion Source The CI ion source (Figure 28 Figure 29) is similar to the EI source, but only has one part in common with the EI source — the entrance lens. The single CI filament has a straight wire and a reflector. A “dummy” filament provides connections for the other wires.
  • Page 151 Analyzers and Collision Cell Setscrew CI repeller CI repeller insulator CI filament CI ion source heater assembly CI dummy filament CI interface tip seal CI lens insulator CI ion focus lens CI drawout cylinder CI drawout plate Entrance lens Figure 29 CI ion source exploded view Troubleshooting and Maintenance Manual...

  • Page 152: Filaments

    Analyzers and Collision Cell Filaments Two filaments (Figure 27 Figure 29) are located on opposite sides of the outside of the EI ion source. The active filament carries an adjustable AC emission current. The emission current heats the filament causing it to emit electrons which ionize the sample molecules.
  • Page 153 Analyzers and Collision Cell Filament care Like the filaments in incandescent light bulbs, the ion source filaments will eventually burn out. Certain practices will reduce the chance of early failure: • Use the ion vacuum gauge to verify that the system has an adequate vacuum before turning on the analyzer, especially after any maintenance was performed.

  • Page 154: Other Source Elements

    Analyzers and Collision Cell Other Source Elements Magnet The field created by the magnet directs the electrons emitted by the filament into and across the ionization chamber. The magnet assembly is a permanent magnet with a charge of 350 gauss in the center of the field. Repeller The repeller (Figure...
  • Page 155 Analyzers and Collision Cell Ion focus The voltage on the ion focus lens (Figure 27) can be varied from 0 to –127 VDC. A typical voltage is between –70 and –90 VDC. In general: • Increasing the ion focus voltage improves sensitivity at lower masses. •...

  • Page 156: Quadrupole Mass Filters

    Analyzers and Collision Cell Quadrupole Mass Filters The mass filters separate ions according to their mass-to-charge ratio (m/z). At a given time, only ions of a selected mass-to-charge ratio can pass through the filter to the detector. The mass filters in the MS are quadrupoles (Figure 30).
  • Page 157 Analyzers and Collision Cell Figure 30 Quadrupole mass filter Width gain Width gain affects the ratio of DC voltage to RF frequency on the mass filter. This controls the widths of the mass peaks. • Higher gain yields narrower peaks. •...
  • Page 158 If absolutely necessary (that is, if the only alternative is replacement), the quadrupole can be cleaned. Cleaning must be performed by Agilent Technologies service personnel. Never put the quadrupole in an ultrasonic cleaner. C A U T I O N Never change the physical orientation of the quadrupole mass filter.

  • Page 159: Post- And Pre-Filters

    Analyzers and Collision Cell Post- and Pre-Filters These four-electrode devices are located at the end of the front analyzer and the beginning of the rear analyzer. They have three purposes: • Support and align the collision cell between the two analyzers. •...

  • Page 160: Collision Cell

    Analyzers and Collision Cell Collision Cell The collision cell requires no periodic maintenance. The cell houses a hexapole (this is the second of the three quadrupoles) containing a reaction gas, typically a nitrogen/helium mixture. Precursor ions from the front analyzer may interact with the reaction gas to form product ions.

  • Page 161: Detector

    Analyzers and Collision Cell Detector The detector (Figure 33) in the MS analyzer is a high energy conversion dynode (HED) coupled to an electron multiplier (EM). The detector is located at the exit of the rear analyzer. It receives the ions that have passed through the mass filter.
  • Page 162 Analyzers and Collision Cell As the EM horn ages, the voltage (EMVolts) required increases over time. If the EM voltage must always be set at or near –3000 VDC to complete Autotune, with no other probable cause, it may need to be replaced. A warning message will alert you if more then 3000 volts are needed to achieve the gain values.

  • Page 163: Analyzer Heaters And Radiators

    Analyzers and Collision Cell Analyzer Heaters and Radiators The ion source and mass filter are housed in cylindrical aluminum tubes called radiators (Figure 34). The radiators control the distribution of heat in the analyzer. They also provide electrical shielding for analyzer components. The source heater and temperature sensor are mounted in the source heater block.
  • Page 164 Analyzers and Collision Cell Mass filter radiator Mass filter heater assembly Ion source radiator Ion source heater assembly Front analyzer shown. Rear analyzer is similar. Figure 34 Heaters and radiators Troubleshooting and Maintenance Manual...
  • Page 165 GC/MS. It may be of interest to persons responsible for servicing the GC/MS. Dangerous voltages are present under the safety covers. Do not remove safety WA R N I N G covers. Refer servicing to your Agilent Technologies service representative. Agilent Technologies...

  • Page 166: Electronics

    Electronics Power Switch See also The GC/MS MassHunterWorkstation in the Getting Started manual. Power switch The power switch is located on the lower left of the front of the MS. It is separate from the electronics module and is connected via a cable. It is used to turn the MS and foreline pump on and off.

  • Page 167: Ion Source Board

    Electronics Ion Source Board Figure 36 Ion source board The ion source board performs these functions: • Passes voltages generated on the main board and the filament drive board to elements in the ion source. • Generates and adjusts filament emission current and electron energy as controlled by the main board.

  • Page 168: Quadrupole Boards

    Electronics Quadrupole Boards Front board shown. Rear board is same but mounted upside down. Figure 37 Quadrupole boards The quadrupole boards are mounted on the side plates. They perform these functions: • Provide the 1 MHz reference clock for the RF amplifier. •...

  • Page 169: Collision Cell Board

    Electronics Collision Cell Board Figure 38 Collision cell board This board has two functions: • Generates the controlling voltages for the hexapole. • Creates the RF signal for the collision cell. Troubleshooting and Maintenance Manual...

  • Page 170: Detector Board

    Electronics Detector Board Figure 39 Detector board The detector board performs these functions: • Passes high voltage to the detector. • Receives and passes on the detector signal. Troubleshooting and Maintenance Manual...

  • Page 171: Electronics Module

    Electronics Electronics Module Most of the electronics in the MS are contained in the electronics module. The whole electronics module can be replaced, if necessary, by your Agilent Technologies service representative. The electronics module contains: • Main Board 1 • Main Board 2 •...
  • Page 172 Electronics Low-voltage power supply HED supply Toroid transformer AC board Figure 40 Electronics module, side 1 Troubleshooting and Maintenance Manual...
  • Page 173 Electronics Main board 2 LAN board Bus board Power switch board (main board 1 is behind it) Figure 41 Electronics module, side 2 Main boards Two main boards are mounted on the outer side of the electronics module. The boards are identical except that main board 1 carries the log amplifier for the detector signal and the EMV power supply.
  • Page 174 Electronics • Perform analog-to-digital conversion for the direct signal, ion source, and mass filter temperature signals, and foreline pressure or turbo pump speed signal. • Monitor the signals from the vacuum system and fans and the filament status, HV fault and RF fault signals from the quadrupole board. Activate the shutdown line when the analyzer electronics must be disabled.
  • Page 175 Electronics • Turns on the turbo pump once the foreline pressure is low enough, as directed by the main board. • Turns off the turbo pump if the foreline pressure is too high. • Passes the foreline pressure signal from the foreline gauge or turbo pump speed and other vacuum status information to the main board.

  • Page 176: Bus Board

    Electronics Bus board This board is mounted on the bottom of the electronics module. It acts as a bus connecting the two main boards. PLX card This card, located inside the SmartCard module, provides fast communications between the processor module and other parts of the MS system.

  • Page 177: Power Supplies

    Electronics Power Supplies Low-voltage (AC-DC) power supply The low voltage power supply is mounted next to the toroid transformer in the electronics module. A universal input power supply, it converts AC line voltage into the DC voltages used by the rest of the electronics. The power supply generates the following DC voltages: •...

  • Page 178: Back Panel Connectors

    Electronics Back Panel Connectors The back panel contains several connectors (Figure 42) and the four primary fuses. Remote Fuses start/stop communications Turbo pump power Foreline pump power Turbo controller/fan Main power cord Vacuum gauges Figure 42 Back panel connections Troubleshooting and Maintenance Manual...
  • Page 179 Electronics Primary fuses The four primary fuses limit current into the MS in case of a short circuit in the foreline pump. Fuse values are shown on the panel. Turbo pump power receptacle The turbo pump power receptacle provides power for the turbo pump. Foreline pump power receptacle The foreline pump power cord receptacle provides AC power for the foreline pump.

  • Page 180: Interfacing To External Devices

    Electronics Interfacing to External Devices Remote control processor The remote control processor on the LAN/MS control card synchronizes start-run signals with GCs and other devices. The functions of the remote control processor are extended to the remote start (Remote) connector (Figure 43) on the back panel of the MS.
  • Page 181 Electronics signal. On receipt of the ready signal, the desorbtion cycle begins. When a specific temperature is reached, the purge-and-trap closes a contact to indicate the run has started. The ready pin on the remote start connector on the GC is held low at all times except when the GC, MS, and data system are all ready.
  • Page 182 Electronics Troubleshooting and Maintenance Manual...
  • Page 183 This chapter lists parts that can be ordered for use in maintaining your 7000 Series Triple Quad GC/MS. It includes most of the parts or assemblies in the MS. Some of the parts listed are not user-replaceable. They are listed here for use by Agilent Technologies service representatives. Agilent Technologies...

  • Page 184: Replacement Parts

    To Order Parts To order parts for your MS, address the order or inquiry to your local Agilent Technologies office. Supply them with the following information: • Model and serial number of your MS, located on a label on the lower left side near the front of the instrument.

  • Page 185: Electronics

    Replacement Parts Electronics The printed circuit boards in the MS are available only as complete assemblies. Individual electronic components are not available. This section contains the following parts: cables (Tables and 8), printed circuit boards (Table 9), and fuses and switches (Table 11).
  • Page 186 Replacement Parts Table 8 Internal cables Description Part number Cable, AC board main power input G2571-60844 Cable, SC4 Low voltage power G2571-60825 Cable, Hard disk G2571-60826 Cable, SM4 reset G2571-60885 Cable, Standby switch G7000-60819 Cable, Communication G1978-60802 Cable, HED 10 KV output G7000-60813 Cable, HED control G1946-60048...
  • Page 187 Replacement Parts Printed circuit boards Table 9 Printed circuit boards Description Part number Quad driver assembly (2) G7000-65015 Filament drive board G7000-61100 Collision cell board G7000-61005 Detector feedthrough board G7000-61011 Motherboard, 1 GHz, 1 GB memory 0960-2490 SDRAM, 256 MB 1818-8947 PLX board G2571-61001...
  • Page 188 Replacement Parts Fuses and power switch Table 11 Fuses and power switches Description Part number Fuse 8A, slow blow, electronics, fans, and power supplies 2110-0969 Fuse, 12.5A, slow blow, foreline and turbo pump 2110-1398 Power switch board G7000-61010 Push rod G7000-40050 Switch board cable G7000-60819...

  • Page 189: Local Control Panel

    Replacement Parts Local Control Panel This section lists replaceable parts for the LCP and related covers. See Figure Table 12 LCP and related parts Item Description Part number LCP fascia G7000-60094 LCP fascia with LCP board G7000-61002 LCP fascia assembly Figure 44 Local control panel replacement parts Troubleshooting and Maintenance Manual...

  • Page 190: Vacuum System

    Replacement Parts Vacuum System This section lists replacement parts available for the vacuum system. It includes clamps, O-rings and seals (Table 13), foreline pump and related components (Table 14 Figure 45), and turbo pump vacuum system components (Table 15). O-rings and seals Table 13 O-rings and seals Description...
  • Page 191 Replacement Parts Foreline pump and related parts Both foreline pumps are included in this table: • DUO 2.5 standard pump • RV5 high flow pump Table 14 Foreline pump and related parts (Figure Item Description Part number Foreline hose assembly (hose and internal spring) 05971-60119 •...
  • Page 192 Replacement Parts Table 14 Foreline pump and related parts (Figure 45) (continued) Item Description Part number KF25 to KF16 adapter KF25 Clamp (tp end of hose – not shown) 0100-0549 KF25 Hose adapter (tp end of hose – not shown) G1099-20532 Oil drip tray G1099-00015...
  • Page 193 Replacement Parts Figure 45 Foreline pump top and safety cage parts Troubleshooting and Maintenance Manual...
  • Page 194 Replacement Parts Turbo pump and related parts Table 15 Turbo pump MS vacuum system components Item Description Part number Fan (for high-vacuum pump) G1099-60564 KF25 clamp (for turbo pump outlet) 0100-0549 KF25 O-ring assembly (for turbo pump outlet) 0100-1551 Split flow turbo pump G7000-80010 Split flow turbo pump, rebuilt G7000-89010...

  • Page 195: Analyzer

    Replacement Parts Analyzer Table 16 shows the analyzer chambers and associated parts. Table 16 Front analyzer chamber and related parts (Figure Item Description Part number Shield/plate for ion gauge port G3170-00003 Ion vacuum gauge baffle G3170-00015 • M3X12 TX T10 PN SQ Cone SS (qty 2) 0515-0664 EI Calibration valve assembly G3170-60204...
  • Page 196 Replacement Parts Table 17 shows the replacement parts for the analyzers. Analyzer screws (Table 18) and the individual ion source parts (Table 19) are listed in the tables that follow. Table 17 Analyzer parts Item Description Part number Front quad Rear quad Feedthrough board (source board) G7000-6525...
  • Page 197 Replacement Parts Table 18 Analyzer screws Description Part number Heater/Sensor (quad) setscrew 0515-1446 Ion source thumbscrew G1099-20138 Magnet mounting screws 0515-1046 Screw – magnet bracket to source radiator 0515-1602 Screws – source radiator and detector to quad radiator G3170-20123 Screws – mass filter contact assembly/heater block G3170-20122 Screws –...
  • Page 198 Replacement Parts Table 19 Inert EI ion source (continued) Description Part number Lens insulator (one piece) G3170-20530 Inert EI 350 Anodized Repeller assembly G3170-60171 Screws for filament G1999-20021 Source heater assembly G3170-60177 Setscrew for lens stack G1999-20021 Source body G7000-20130 Troubleshooting and Maintenance Manual...
  • Page 199 Replacement Parts Figure 47 EI 7000 ion source Troubleshooting and Maintenance Manual...
  • Page 200 Replacement Parts EI Extractor source Table 20 EI extractor ion source Description Part number Inert ion source, new G7000-65710 Inert ion source, rebuilt G7000-69710 Extractor lens, 3 mm G7000-20444 Extractor lens, 6 mm G7000-20446 Extractor lens insulator G7000-20445 Extractor lens wire G7000-60827 Entrance lens G3170-20126...
  • Page 201 Replacement Parts Figure 48 EI extractor ion source Troubleshooting and Maintenance Manual...
  • Page 202 Replacement Parts CI source Table 21 CI ion source Description Part number Inert ion source, new G3170-65403 CI Drawout cyclinder G1999-20444 CI Drawout plate G1999-20446 Entrance lens assembly G3170-20126 CI filament G1099-80053 CI Dummy filament G1999-60454 CI interface tip seal G1999-60412 CI Ion focus lens G1999-20443...
  • Page 203 Replacement Parts Figure 49 CI ion source Troubleshooting and Maintenance Manual...
  • Page 204 Replacement Parts Repeller assembly Table 22 Repeller assembly Description Part number EI 350 Anodized Repeller assembly G3170-60172 Inert EI 350 Anodized Repeller assembly G3170-60171 Insulator (2 required) G1099-20133 Nut, 5.5-mm 0535-0071 Repeller G2589-20044 Setscrew 0515-1446 Anodized Source Heater Assembly G3170-60177 Washer for repeller 3050-0891 Troubleshooting and Maintenance Manual...

  • Page 205: Ei Gc/Ms Interface

    Replacement Parts EI GC/MS Interface Table 23 lists the replacement parts related to the EI GC/MS interface. Table 23 EI GC/MS interface Description Part number GC/MS interface (complete) G1099-60300 Interface column nut 05980-20066 Heater sleeve G1099-20210 Heater/Sensor assembly G1099-60107 Insulation G1099-20301 Setscrew for heater/sensor assembly 0515-0236...

  • Page 206: Consumables And Maintenance Supplies

    Replacement Parts Consumables and Maintenance Supplies This section (Tables through 27) lists parts available for cleaning and maintaining your MS. Table 24 EI maintenance supplies Description Part number Abrasive paper, 30 µm 5061-5896 Alumina powder, 1 kg 8660-0791 Cloths, clean (qty 300) 05980-60051 Cloths, cleaning (qty 300) 9310-4828...
  • Page 207 Replacement Parts Table 25 Tools Description Part number Column installation tool G1099-20030 Funnel 9301-6461 Hex key, 5 mm 8710-1838 Tool Kit G1099-60566 Ball drivers, 1.5-mm 8710-1570 Ball drivers, 2.0-mm 8710-1804 Ball drivers, 2.5-mm 8710-1681 Hex nut driver, 5.5-mm 8710-1220 Pliers, long-nose (1.5-inch nose) 8710-1094 Screwdrivers Flat-blade, large 8730-0002...
  • Page 208 Replacement Parts Table 26 Ferrules Description Part number For the GC/MS interface • Blank, graphite-vespel 5181-3308 • 0.3-mm id, 85%/15% for 0.10-mm id columns 5062-3507 • 0.4-mm id, 85%/15%, for 0.20 and 0.25-mm id columns 5062-3508 • 0.5-mm id, 85%/15%, for 0.32-mm id columns 5062-3506 •...
  • Page 209 Replacement Parts Table 27 Miscellaneous parts and samples Description Part number EM horn G3170-80103 Auxiliary EPC flow module G1570-60535 Wire, iris G7000-60828 Wire, extractor lens G7000-60827 HED Detector assembly, with iris lens G7000-80102 EPC manifold G3270-20055 Heater/Sensor assembly, GC/MS interface G1099-60107 Octafluoronaphthalene, OFN, 100 fg/µL 5188-5348...

  • Page 210: Additional Ci Parts

    Replacement Parts Additional CI Parts Table 28 Table 29 show parts that may be required to maintain the 7000 Series Triple Quad GC/MS with CI. The parts in this section are related directly to the CI accessory, and are in addition to the source parts listed in Table 21;...
  • Page 211 Replacement Parts Table 29 CI GC/MS interface and covers Description Part number CI GC/MS interface Assembly G3170-65400 Heater clamp G1999-20410 Heater/Sensor assembly G1099-60107 Transfer line cup (cover) G3170-00405 Interface insulation G1999-20401 Screws for heater clamp 0515-0383 Screws to attach interface to manifold 0515-0380 Welded interface G3170-60401...
  • Page 212 Replacement Parts Figure 50 CI flow control module Troubleshooting and Maintenance Manual...
  • Page 214 Agilent Technologies © Agilent Technologies, Inc. Printed in USA, September 2009...

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