Agilent 5973 inert User manual

5973 inert Mass Selective Detector

Hardware Manual

Agilent Technologies

5973 inert Mass Selective Detector

Hardware Manual

Notices

No part of this manual may be reproduced in any form or by any means (including electronic storage and retrieval or translation into a foreign language) without prior agreement and written consent from Agilent Technologies, Inc. as governed by United States and international copyright laws.

Manual Part Number

G2589-90071

Edition

Second edition, August 2003

Agilent Technologies, Inc. 2850 Centerville Road Wilmington, DE 19808-1610 USA

Acknowledgements

Microsoft® and Windows® are U.S. registered trademarks of Microsoft Corporation.

Warranty

The material contained in this document is provided “as is,” and is subject to being changed, without notice, in future editions. Further, to the maximum extent permitted by applicable law, Agilent disclaims all warranties, either express or implied, with regard to this manual and any information contained herein, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Agilent shall not be liable for errors or for incidental or consequential damages in connection with the furnishing, use, or performance of this document or of any information contained herein. Should Agilent and the user have a separate written agreement with warranty terms covering the material in this document that conflict with these terms, the warranty terms in the separate agreement shall control.

Safety Notices

CAUTION

A CAUTION notice denotes a hazard. It calls attention to an operating procedure, practice, or the like that, if not correctly performed or adhered to, could result in damage to the product or loss of important data. Do not proceed beyond a CAUTION notice until the indicated conditions are fully understood and met.

WARNING

A WARNING notice denotes a hazard. It calls attention to an operating procedure, practice, or the like that, if not correctly performed or adhered to, could result in personal injury or death. Do not proceed beyond a WARNING notice until the indicated conditions are fully understood and met.

Chapter Introduction

5973 inert MSD Version, 14 About this manual, 15 Other User Information, 16 The 5973 inert MSD, 17 CI MSD hardware description, 19 Important Safety Warnings, 21 Safety and Regulatory Certifications, 24 Cleaning/Recycling the Product, 27

Chapter 1 Installing GC Columns

To prepare a capillary column for installation, 32 To install a capillary column in a split/splitless inlet, 34 To condition a capillary column, 36 To install a capillary column in the GC/MSD interface, 38 To install a capillary column using the installation tool, 40

Chapter 2 Operating the MSD

To view MSD analyzer temperature and vacuum status, 48 To set monitors for MSD temperature and vacuum status, 50 To set the MSD analyzer temperatures, 52 To set the GC/MSD interface temperature from the PC, 54 To monitor high vacuum pressure, 56 To measure column flow linear velocity, 58 To calculate column flow, 59 To tune the MSD, 60 To verify system performance, 61

Verify the tune performance, 61 Verify the sensitivity performance, 61

To remove the MSD covers, 62

Analyzer cover, 62

Lower MSD cover, 62 To vent the MSD, 64 To open the analyzer chamber, 66 To close the analyzer chamber, 68

To pump down the MSD, 70 To pump down the CI MSD, 72 To connect the gauge controller, 73 To move or store the MSD, 75 To set the interface temperature from a 6890 GC, 77

Chapter 3 Operating the CI MSD

To switch from EI to CI operating mode, 82 To set up the software for CI operation, 83 To operate the reagent gas flow control module, 84 To set up methane reagent gas flow, 86 CI autotune, 88 To perform a positive CI autotune (methane only), 90 To perform a negative CI autotune (any reagent gas), 92 To verify positive CI performance, 94 To verify negative CI performance, 95 To monitor high vacuum pressure, 96

Typical pressure readings, 97

To use other reagent gases, 98

Isobutane CI, 99 Ammonia CI, 100 Carbon dioxide NCI, 101

To switch from CI to EI operating mode, 102

Chapter 4 Troubleshooting the MSD

General symptoms, 106

GC does not turn on, 106 MSD does not turn on, 106 Foreline pump is not operating, 106 MSD turns on but then the foreline pump shuts off, 107 Control panel says “No server found”, 107

Chromatographic symptoms, 108

No peaks, 108 Peaks are tailing, 109 Peaks are fronting, 109 Peaks have flat tops, 110 Peaks have split tops, 110 Baseline is rising, 110 Baseline is high, 110

Baseline is falling, 110 Baseline wanders, 111 Retention times for all peaks drift – shorter, 111 Retention times for all peaks drift – longer, 111 Poor sensitivity, 112 Poor Repeatability, 112

Mass spectral symptoms, 113

No peaks, 113 Isotopes are missing or isotope ratios are incorrect, 113 High background, 113 High abundances at m/z 18, 28, 32, and 44 or at m/z 14 and 16, 114 Mass assignments are incorrect, 114 Peaks have precursors, 114 Peak widths are inconsistent, 114 Relative abundance of m/z 502 is less than 3%, 115 Spectra look different from those acquired with other MSDs, 115 High mass sensitivity is poor, 116

Pressure symptoms, 117

Foreline pressure is too high, 117 Analyzer chamber pressure is too high (EI operating mode), 117 Foreline pressure is too low, 118 Analyzer chamber pressure is too low, 118 Gauge controller displays 9.9+9 and then goes blank, 118 Power indicator on the gauge controller does not light, 119

Temperature symptoms, 120

Ion source will not heat up, 120 Mass filter (quad) heater will not heat up, 121 GC/MSD interface will not heat up, 121

Error messages, 122

Difficulty in mass filter electronics, 122 Difficulty with the electron multiplier supply, 122 Difficulty with the fan, 123 Difficulty with the HED supply, 123 Difficulty with the high vacuum pump, 123 High Foreline pressure, 124 Internal MS communication fault, 124 Lens supply fault, 124 Log amplifier ADC error, 124 No peaks found, 124 Temperature control disabled, 125 Temperature control fault, 125 The high vacuum pump is not ready, 126

The system is in standby, 126 The system is in vent state, 127 There is no emission current, 127

There is not enough signal to begin tune, 127 Air leaks, 128 Contamination, 129

Chapter 5 CI Troubleshooting

Troubleshooting tips and tricks, 133 Air leaks, 134

How do I know if I have an air leak?, 134

How do I find the air leak?, 136 Pressure-related symptoms (overview), 138 Poor vacuum without reagent gas flow, 139 High pressure with reagent gas flow, 140 Pressure does not change when reagent flow is changed, 141 Signal-related symptoms (overview), 142 No peaks, 143

No reagent gas peaks in PCI, 143

No PFDTD peaks in PCI, 144

No reagent gas peaks in NCI, 144

No PFDTD calibrant peaks in NCI, 144

No sample peaks in NCI, 144

Large peak at m/z 238 in NCI OFN spectrum, 144 No or low reagent gas signal, 145 No or low PFDTD signal, but reagent ions are normal, 148 Excessive noise or low signal-to-noise ratio, 150 Large peak at m/z 19, 151 Peak at m/z 32, 152 Tuning-related symptoms (overview), 154 Reagent gas ion ratio is difficult to adjust or unstable, 155 High electron multiplier voltage, 157 Can not complete autotune, 158 Peak widths are unstable, 159

Chapter 6 Maintaining the MSD

Before starting, 162

Maintaining the vacuum system 169

To check and add foreline pump oil, 170

To drain the foreline pump, 172 To refill the foreline pump, 174 To replace the turbo pump, 177 To separate the MSD from the GC, 178 To reconnect the MSD to the GC, 180 To remove the EI calibration vial, 182 To refill and reinstall the EI calibration vial, 184 To purge the calibration valves, 186

EI calibration valve, 186

CI calibration valve, 186 To remove the EI calibration valve, 187 To reinstall the EI calibration valve, 189 To replace the fan for the high vacuum pump, 191 To remove the triode gauge tube, 193 To reinstall a triode gauge tube, 195 To lubricate the side plate O-ring, 197 To lubricate the vent valve O-ring, 199

Maintaining the analyzer 201

To remove the ion source, 203 To disassemble the ion source, 205 To clean the ion source, 207 To reassemble the ion source, 212 To reinstall the ion source, 214 To remove a filament, 216 To reinstall a filament, 218 To remove the heater and sensor from the ion source, 220 To reinstall the heater and sensor in the ion source, 222 To remove the heater and sensor from the mass filter, 224 To reinstall the heater and sensor in the mass filter, 226 To replace the electron multiplier horn, 228

Maintaining the GC/MSD interface 230

To remove the GC/MSD interface heater and sensor, 232 To reinstall the GC/MSD interface heater and sensor, 234

Maintaining the electronics 236

To adjust the RF coils, 238 To replace the primary fuses, 240

Chapter 7 CI Maintenance

To set up your MSD for CI operation, 245 To install the CI ion source, 246 To install the CI interface tip seal, 248 To clean the CI ion source, 250

Frequency of cleaning, 250

Cleaning procedure, 250 To minimize foreline pump damage from ammonia, 252 To replace the methane/isobutane gas purifier, 253 To clean the reagent gas supply lines (tubing), 254 To refill the CI calibrant vial, 255

Chapter 8 Vacuum System

Turbo pump MSD vacuum system, 262 Turbo pump analyzer chamber, 263 Side plate, 264 Vacuum seals, 266

Face seals, 266

KF (NW) seals, 266

Compression seals, 266

High voltage feedthrough seal, 267 Foreline pump, 268 Turbomolecular pump and fan, 270 Standard turbo pump, 271 Performance turbo pump, 272 Calibration valves and vent valve, 273

Calibration valves, 273

EI calibration valve, 273

CI calibration valve, 273

Vent valve, 273 Triode gauge tube, 275 Gauge controller, 277

Chapter 9 GC/MSD Interfaces and

CI Flow Control

EI GC/MSD interface, 281 EI/CI GC/MSD interface (CI interface), 282 Reagent gas flow control module, 283

Chapter 10 Analyzer

Ion source, 290

Ion source body, 290 Filaments, 292 Magnet, 293 Repeller, 293 Drawout plate and cylinder, 294 Ion focus, 294 Entrance lens, 294

Source Washer, 295 CI ion source, 297 Quadrupole mass filter, 299

AMU gain, 299

AMU offset, 300

219 width, 300

DC polarity, 301

Mass (axis) gain, 301

Mass (axis) offset, 301

Quadrupole maintenance, 302 Detector, 303

Detector focus lens, 303

High energy dynode, 303

Electron multiplier horn, 303 Analyzer heaters and radiators, 305

Chapter 11 Electronics

Control panel and power switch, 310

Control panel, 310

Power switch, 310 Side board, 312 Electronics module, 313 Main board, 314 Signal amplifier board, 315 AC board, 316 LAN/MSD control card, 318 Power supplies, 319

Low voltage (ac-dc) power supply, 319

High voltage (HED) power supply, 319

Toroid transformer, 319 Back panel and connectors, 320

Interfacing to external devices, 322

Remote control processor, 322 Remote start signals, 322

Chapter 12 Parts

Electronics, 327 Vacuum system, 332 Analyzer, 338 EI GC/MSD interface, 344 Consumables and maintenance supplies, 346 CI Parts, 350

Appendix A Chemical Ionization Theory

Chemical ionization overview, 360

References on chemical ionization, 361

Positive CI theory, 362

Proton transfer, 364 Hydride abstraction, 366 Addition, 366 Charge exchange, 367

Negative CI theory, 368

Electron capture, 370 Dissociative electron capture, 371 Ion pair formation, 371 Ion-molecule reactions, 372

Introduction

This manual describes the operation, troubleshooting, and maintenance of the Agilent Technologies 5973 inert Mass Selective Detector (MSD)

5973 inert MSD Version

5973 inert MSDs are equipped with or one of two turbomolecular (turbo) pumps. Chemical Ionization is available for the turbo pump MSDs only. The serial number label displays a product number that tells what kind of MSD you have. In this manual, the term “CI MSD” applies to the EI/PCI/NCI MSD.

Model number Description

G2578A Standard turbo EI MSD

G2579A Performance turbo EI MSD G2589A Performance turbo EI/PCI/NCI MSD

Introduction

About this manual

• The introduction describes general information about the 5973 inert

MSD.

• Chapter 1 shows you how to prepare and install a capillary column.

• Chapter 2 describes basic tasks such as setting temperatures, monitoring

pressures, tuning, and venting, and pumpdown.

• Chapter 3 describes basic tasks necessary to operate a CI MSD in CI

mode.

• Chapter 4 provides a quick reference for identifying causes of poor

instrument performance or malfunctions.

• Chapter 5 provides a quick reference for identifying problems unique to

CI MSDs.

• Chapter 6 features maintenance procedures.

• Chapter 7 features maintenance procedures unique to CI MSDs.

• Chapter 8 describes operation of the components of the vacuum system.

• Chapter 9 describes the GC/MSD interface, and the CI flow module.

• Chapter 10 describes operation of the analyzer (ion source, mass filter,

and detector).

• Chapter 11 describes the electronics that control the MSD.

• Chapter 12 contains illustrated parts identification and part numbers.

• Appendix A is an overview of chemical ionization theory.

For updated information, check the Agilent Technologies Life Sciences/ Chemical Analysis web site at http://www.agilent.com/chem.

Introduction

Other User Information

Additional information is contained in the following documentation:

• 5973N and 5973 inert Mass Selective Detector Hardware Installation

Manual

• 5973N and 5973 inert Mass Selective Detector Site Preparation Guide

• 6890 Series GC manuals

• GC accessories (autosampler, etc.) manuals

• G1701DA MSD Productivity ChemStations software manuals and online help

• 5973N and 5973 inert Mass Selective Detector Specifications (59889991EN)

• Hydrogen Carrier Gas Safety Guide (5955-5398)

• 5973N and 5973 inert Mass Selective Detector Local Control Panel

(LCP) Quick Reference

• For updated information, see the Agilent Technologies web site at http://www.agilent.com/chem

1. Located on this CD-ROM [5973 and 5973 inert Mass Selective Detector User Information]

Introduction

The 5973 inert MSD

The 5973 inert MSD is a stand-alone capillary GC detector

The 5973 inert Mass Selective Detector (MSD) is designed for use with the 6890 Series Gas Chromatograph. The MSD features:

• Control panel for locally monitoring and operating the MSD

• One of two different high vacuum pumps

• Rotary vane foreline pump

• Independently heated electron-ionization ion source

• Independently heated hyperbolic quadrupole mass filter

• High-energy dynode (HED) electron multiplier detector

• Independently heated GC/MSD interface

• Chemical ionization (EI/PCI/NCI) model available

Physical description

The 5973 inert MSD is a rectangular box, approximately 42 cm high, 26 cm wide, 65 cm deep. The weight is 26 kg for the standard turbo pump mainframe and 29 kg for the performance turbo pump mainframe. The attached rough pump weighs an additional 11 kg.

The basic components of the instrument are: the frame/cover assemblies, the control panel, the vacuum system, the GC interface, the electronics, and the analyzer.

The control panel allows local monitoring and operation of the MSD

The control panel acts as a local user interface to the MSD. You can perform some basic tasks such as running a tune, a method, or a sequence; and monitor MSD status from the control panel.

Introduction

The 5973 inert MSD

An optional gauge controller is available for measuring vacuum

The 5973 inert MSD is equipped with a triode ionization gauge tube. With an 59864B Gauge Controller, the tube can be used to measure pressure (high vacuum) in the vacuum manifold. Installation and operation of the gauge controller is described in this manual.

The gauge controller is

Feature G2578A G2579A G2589A

High vac pump Standard turbo Performance turbo Performance turbo Optimal He column flow mL/min 1 1 to 2 1 to 2

Maximum recommended gas flow, mL/min

Maximum gas flow,

mL/min

Max column id 0.32 mm (30m) 0.53 mm (30 m) 0.53 mm (30 m)

CI capability no no PCI/NCI DIP capability

(3rd Party)

a. Total gas flow into the MSD: column flow plus reagent gas flow (if applicable). b. Expect degradation of spectral performance and sensitivity.

required for chemical ionization (CI) operation.

5973 inert MSD models and features

2.0 4 4

2.4 6.5 6.5

yes yes no

Introduction

CI MSD hardware description

In this manual, the term “CI MSD” applies to the EI/PCI/NCI MSD. The CI hardware allows the 5973 inert MSD to produce high- quality, classical CI spectra, which include molecular adduct ions. A variety of reagent gases can be used.

The 5973 inert CI system adds to the 5973 inert MSD:

• Redesigned EI/CI GC/MSD interface

• CI ion source and interface tip seal

• Reagent gas flow control module

• Bipolar HED power supply (for PCI/NCI MSD

only)

• A methane/isobutane gas purifier is provided, and is required. It removes oxygen, water, hydrocarbons, and sulfur compounds.

A high vacuum gauge controller (59864B) is

required for the CI MSD.

To achieve the relatively high source pressure required for CI while still maintaining high vacuum in the quadrupole and detector, the MSD CI system has been carefully optimized. Special seals along the flow path of the reagent gas and very small openings in the ion source keep the source gases in the ionization volume long enough for the appropriate reactions to occur.

The EI/CI interface has special plumbing for reagent gas. A spring-loaded insulating seal fits onto the tip of the interface.

Switching back and forth between CI and EI takes less than an hour, although a 1– to 2–hour wait is

required in order to purge the reagent gas

lines and bake out water and other contaminants. Switching from PCI to NCI requires about 2 hours for the ion source to cool.

6890 Series

LS tower

6890 Series ALS tray

59864B High Vacuum Gauge Controller

CI gas flow module (EI/PCI/NCI MSD only)

5973 inert Mass Selective Detector

5973 inert MSD control panel

Introduction

CI MSD hardware description

6890 Gas Chromatograph

5973 inert MSD serial number sticker

Introduction

Important Safety Warnings

Before moving on, there are several important safety notices that you should always keep in mind when using the 5973 inert Mass Selective Detector.

Many internal parts of the MSD carry dangerous voltages

If the MSD is connected to a power source, even if the power switch is off, potentially dangerous voltages exist on:

• The wiring between the MSD power cord and the AC power supply, the AC

power supply itself, and the wiring from the AC power supply to the power switch.

With the power switch on, potentially dangerous voltages also exist on:

• All electronics boards in the instrument.

• The internal wires and cables connected to these boards.

• The wires for any heater (oven, detector, inlet, or valve box).

WA R N I N G All these parts are shielded by covers. With the covers in place, it should be difficult to

accidentally make contact with dangerous voltages. Unless specifically instructed to, never remove a cover unless the detector, inlet, or oven are turned off.

WA R N I N G If the power cord insulation is frayed or worn, the cord must be replaced. Contact your

Agilent service representative.

Electrostatic discharge is a threat to MSD electronics

The printed circuit (PC) boards in the MSD can be damaged by electrostatic discharge. Do not touch any of the boards unless it is absolutely necessary. If you must handle them, wear a grounded wrist strap and take other antistatic precautions. Wear a grounded wrist strap any time you must remove the MSD right side cover.

Introduction

Important Safety Warnings

Many parts are dangerously hot

Many parts of the MSD operate at temperatures high enough to cause serious burns. These parts include but are not limited to:

• The inlets

• The oven and its contents

• The detectors

• The column nuts attaching the column to an inlet or detector

• The valve box

You should always cool these areas of the MSD to room temperature before working on them. They will cool faster if you first set the temperature of the heated zone to room temperature. Turn the zone off after it has reached the setpoint. If you must perform maintenance on hot parts, use a wrench and wear gloves. Whenever possible, cool the part of the instrument that you will be maintaining before you begin working on it.

WA R N I N G Be careful when working behind the instrument. During cool-down cycles, the MSD emits

hot exhaust which can cause burns.

WA R N I N G The insulation around the inlets, detectors, valve box, and the insulation cups is made of

refractory ceramic fibers. To avoid inhaling fiber particles, we recommend the following safety procedures: ventilate your work area; wear long sleeves, gloves, safety glasses, and a disposable dust/mist respirator; dispose of insulation in a sealed plastic bag; wash your hands with mild soap and cold water after handling the insulation.

Hydrogen

Hydrogen gas may be used as carrier gas, and/or as fuel for the FID. When mixed with air, hydrogen can form explosive mixtures.

Introduction

Important Safety Warnings

W A R N I N G When using hydrogen (H2) as the carrier gas or fuel gas, be aware that hydrogen gas can flow

into the oven and create an explosion hazard. Therefore, be sure that the supply is off until all connections are made, and ensure that the inlet and detector column fittings are either connected to a column or capped at all times when hydrogen gas is supplied to the instrument. Hydrogen is flammable. Leaks, when confined in an enclosed space, may create a fire or explosion hazard. In any application using hydrogen, leak test all connections, lines, and valves before operating the instrument. Always turn off the hydrogen supply at its source before working on the instrument.

WA R N I N G The MSD cannot detect leaks in inlet and/or detector gas streams. For this reason, it is vital

that column fittings should always be either connected to a column, or have a cap or plug installed.

When using hydrogen gas, check the system for leaks to prevent possible fire and explosion hazards based on local Environmental Health and Safety (EHS) requirements. Always check for leaks after changing a tank or servicing the gas lines. Always make sure the vent line is vented into a fume hood.

Introduction

Safety and Regulatory Certifications

The 5973 inert Mass Selective Detector conforms to the following safety standards:

• Canadian Standards Association (CSA): C22.2 No. 1010.1

• CSA/Nationally Recognized Test Laboratory (NRTL): UL 61010A–1

• International Electrotechnical Commission (IEC): 61010–1

• EuroNorm (EN): 61010–1

The 5973 inert Mass Selective Detector conforms to the following regulations on Electromagnetic Compatibility (EMC) and Radio Frequency Interference (RFI):

• CISPR 11/EN 55011: Group 1, Class A

• IEC/EN 61326

•AUS/NZ

This ISM device complies with Canadian ICES-001. Cet appareil ISM est conforme a la norme NMB—001 du Canada.

The 5973 inert Mass Selective Detector is designed and manufactured under a quality system registered to ISO 9001.

Information

The Agilent Technologies 5973 inert Mass Selective Detector meets the following IEC (International Electro-technical Commission) classifications: Safety Class I, Transient Overvoltage Category II, Pollution Degree 2. This unit has been designed and tested in accordance with recognized safety standards and is designed for use indoors. If the instrument is used in a manner not specified by the manufacturer, the protection provided by the instrument may be impaired. Whenever the safety protection of the 5973 Mass Selective Detector has been compromised, disconnect the unit from all power sources and secure the unit against unintended operation. Refer servicing to qualified service personnel. Substituting parts or performing any unauthorized modification to the instrument may result in a safety hazard.

Introduction

Safety and Regulatory Certifications

Symbols

Warnings in the manual or on the instrument must be observed during all phases of operation, service, and repair of this instrument. 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.

See accompanying instructions for more information.

Indicates a hot surface.

Indicates hazardous voltages.

Indicates earth (ground) terminal.

Indicates explosion hazard.

Indicates radioactivity hazard.

Indicates electrostatic discharge hazard.

Electromagnetic Compatibility

This device complies with the requirements of CISPR 11. Operation is subject to the following two conditions:

• This device may not cause harmful interference.

• This device must accept any interference received, including interference that may cause undesired operation.

If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try one or more of the following measures:

Introduction

Safety and Regulatory Certifications

1 Relocate the radio or antenna.

2 Move the device away from the radio or television.

3 Plug the device into a different electrical outlet, so that the device and the

radio or television are on separate electrical circuits.

4 Make sure that all peripheral devices are also certified.

5 Make sure that appropriate cables are used to connect the device to

peripheral equipment.

6 Consult your equipment dealer, Agilent Technologies, or an experienced

technician for assistance.

7 Changes or modifications not expressly approved by Agilent Technologies

could void the user’s authority to operate the equipment.

Sound Emission Certification for Federal Republic of Germany

Sound pressure

Sound pressure Lp < 70 dB am according to ISO 7779:1988.

Schalldruckpegel

Schalldruckpegel LP < 70 dB am nach EN 27779:1991.

Introduction

Cleaning/Recycling the Product

To clean the unit, disconnect the power and wipe down with a damp, lint-free cloth. For recycling, contact your local Agilent sales office.

Introduction

Cleaning/Recycling the Product

Installing GC Columns

How to connect GC columns to the 5973 inert MSD

Installing GC columns

Before you can operate your GC/MSD system, you must select, condition, and install a GC column. This chapter will show you how to install and condition a column. For correct column and flow selection, you must know what type of vacuum system your MSD has. The serial number tag on the lower front of the left side panel shows the model number.

Many types of GC columns can be used with the MSD but there are some restrictions

During tuning or data acquisition the rate of column flow into the MSD should not exceed the maximum recommended flow. Therefore, there are limits to column length and flow. Exceeding recommended flow will result in degradation of mass spectral and sensitivity performance.

Remember that column flows vary greatly with oven temperature (unless the GC is set for constant flow). See To measure column flow linear velocity (page 58) for instructions on how to measure actual flow in your column. Use the Flow Calculation software to determine whether a given column will give acceptable flow with realistic head pressure.

Feature G2578A G2579A G2589A

High vac pump Standard turbo Performance turbo Performance turbo, EI/

PCI/NCI

Optimal gas flow, mL/min

Maximum recommended gas flow, mL/min

Maximum gas flow, mL/min

Max column id 0.32mm (30m) 0.53 mm (30m) 0.53mm (30m)

a. Total gas flow into the MSD: column flow plus reagent gas flow (if applicable). b. Expect degradation of spectral performance and sensitivity.

1 1 to 2 1 to 2

2.0 4 4

2.4 6.5 4

+ 358 hidden pages

Agilent 5973 inert User manual

Table of Contents

Introduction

5973 inert MSD Version

About this manual

Other User Information

The 5973 inert MSD

CI MSD hardware description

Important Safety Warnings

Safety and Regulatory Certifications

Cleaning/Recycling the Product

Installing GC Columns

Installing GC columns