Agilent 5973 inert User manual

5973 inert

Mass Selective Detector

Hardware Manual

Agilent Technologies

5973 inert

Mass Selective Detector

Hardware Manual

Notices

© Agilent Technologies,

Inc. 2003

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.

Table of Contents

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

6

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

7

	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
	8

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

9

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

10

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

11

	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

12

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

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

14

Introduction

About this manual

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.

15

Introduction

Other User Information

Other User Information

Additional information is contained in the following documentation:

•5973N and 5973 inert Mass Selective Detector Hardware Installation Manual1

•5973N and 5973 inert Mass Selective Detector Site Preparation Guide1

•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)1

•5973N and 5973 inert Mass Selective Detector Local Control Panel (LCP) Quick Reference1

•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]

16

Introduction

The 5973 inert MSD

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.

17

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 required for chemical ionization (CI) operation.

	5973 inert MSD models and features
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/mina	2.0	4	4
Maximum gas flow,	2.4	6.5	6.5
mL/minb
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	yes	yes	no
(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.

18

Introduction

CI MSD hardware description

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 highquality, 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.

19

Introduction

CI MSD hardware description

6890 Series

ALS 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

6890

Gas Chromatograph

5973 inert MSD serial number sticker

20

WA R N I N G

WA R N I N G

Introduction

Important Safety Warnings

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).

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.

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.

21

WA R N I N G

WA R N I N G

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.

Be careful when working behind the instrument. During cool-down cycles, the MSD emits hot exhaust which can cause burns.

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.

22

WA R N I N G

WA R N I N G

Introduction

Important Safety Warnings

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.

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.

23

Introduction

Safety and Regulatory Certifications

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.

24

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:

25

Introduction

Safety and Regulatory Certifications

1Relocate the radio or antenna.

2Move the device away from the radio or television.

3Plug the device into a different electrical outlet, so that the device and the radio or television are on separate electrical circuits.

4Make sure that all peripheral devices are also certified.

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

6Consult your equipment dealer, Agilent Technologies, or an experienced technician for assistance.

7Changes 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.

26

Introduction

Cleaning/Recycling the Product

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.

27

Introduction

Cleaning/Recycling the Product

28

1

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

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/mina	1	1 to 2	1 to 2
Maximum recommended gas	2.0	4	4
flow, mL/min
Maximum gas flow, mL/minb	2.4	6.5	4
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.

30