Agilent Technologies 7820A Bedienungsanleitung

Agilent Technologies

Agilent 7820A

Gas Chromatograph

Operating Guide

Notices

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Manual Part Number

G4350-90012

Edition

Third edition, June 2011

Second edition, October 2009

First edition, March 2009

Printed in China

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Acknowledgements

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The hardware and/or software described in

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license and may be used or copied only in

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(November 1995), as applicable in any

technical data.

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.

Operating Guide 3

Contents

1 Introduction

Where to Find Information 8

Online User Documentation 8

Agilent Customer Portal 9

Chromatography Using a GC 10

The Front View of the Agilent 7820A GC 11

The Back View of the Agilent 7820A GC 12

The Inlets 13

The GC Column and Oven 15

Detectors 16

The Operating Panel 17

The display 17

Indicator Lights 17

Alert Tones 18

The keypad 19

2 Operating Basics

Overview 22

Instrument Control 23

Correcting Problems 24

To Start Up the GC 25

To Shut Down the GC for Less Than a Week 26

To Shut Down the GC for More Than a Week 27

3 Software Keypad Operation

To Install the Software Keypad 30

The Software Keypad 31

To connect to a GC 31

To disconnect from a GC 32

Other program settings 32

To minimize or expand the software keypad 33

To troubleshoot a connection 33

To get help 34

The Run Keys 35

The Service Mode Key 35

4Operating Guide

The GC Component Keys 36

The Status Key 37

The Info Key 38

The General Data Entry Keys 39

The Supporting Keys 40

Method Storage and Automation Keys 41

Keypad Functionality When the GC Is Controlled by an Agilent Data

System 42

About GC Status in the Software Keypad 43

Indicators 43

Error conditions 43

Blinking setpoint 44

About Logs 45

4 Running a Method or a Sequence from the Software Keypad

Loading, Storing, and Running Methods from the Software Keypad 48

To load a method 48

To store a method 48

To manually inject a sample with a syringe and start a run 48

To run a method to process a single ALS sample 48

To abort a method 49

Loading, Storing, and Running Sequences from the Software Keypad 50

To load a sequence 50

To store a sequence 50

To start running a sequence 50

To pause a running sequence 51

To resume a paused sequence 51

To stop a running sequence 51

To resume a stopped sequence 51

Aborting a sequence 51

To resume an aborted sequence 52

5 About Methods, Sequences, and Data Analysis

What Is a Method? 54

What Is Saved in a Method? 54

What Happens When You Load a Method? 55

What Is a Sequence? 55

Automating Data Analysis, Method Development, and Sequence

Development 55

Operating Guide 5

6 Configuration Tasks

About the GC IP Address 58

To set the IP address at the GC 59

To Use DHCP to Provide the GC IP Address 60

To restore the default GC IP address 61

To Reconfigure the EPC Module for Another Detector 62

6Operating Guide

Agilent 7820AGas Chromatograph

Operating Guide

Agilent Technologies

Introduction

Where to Find Information 8

Chromatography Using a GC 10

The Front View of the Agilent 7820A GC 11

The Back View of the Agilent 7820A GC 12

The Inlets 13

The GC Column and Oven 15

Detectors 16

The Operating Panel 17

This document provides an overview of the individual

components that make up the Agilent 7820A Gas

Chromatograph (GC).

8Operating Guide

1Introduction

Where to Find Information

In addition to this document, Agilent provides several

learning products that document how to install, operate,

maintain, and troubleshoot the Agilent 7820A GC.

Before operating your GC, be sure to read the safety and

regulatory information included on the Agilent GC and

GC/MS Hardware User Information & Utilities DVD. The

most common safety hazards when working on the GC are:

•Burns caused by touching heated areas on or in the GC

•Release of pressurized gas containing hazardous chemical

compounds caused by opening inlets

•Glass cuts or puncture wounds caused by sharp capillary

column ends

•Use of hydrogen as a GC carrier gas

Online User Documentation

Now your Agilent instrument documentation is in one place,

at your fingertips.

The Agilent GC and GC/MS Hardware User Information &

Utilities DVD that ships with your instrument provides an

extensive collection of online help, videos, and books for

current Agilent gas chromatographs, mass selective detectors,

and GC samplers. Included are localized versions of the

information you need most, such as:

•Getting Familiar documentation

•Safety and Regulatory guide

•Site Preparation information

•Installation information

Introduction 1

Operating Guide 9

•Operating guides

•Maintenance information

•Troubleshooting details

Agilent Customer Portal

Agilent also provides customized information for the

products you own through a customer portal. This web

service provides many customizable services as well as

information related directly to your Agilent products and

orders. Log onto the portal at http://www.agilent.com/chem.

10 Operating Guide

1Introduction

Chromatography Using a GC

Chromatography is the separation of a mixture of

compounds into individual components.

There are three major steps involved with separating and

identifying components of a mixture using a GC. They are:

1Injecting a sample into the GC. (This takes place at the

inlet.)

2Separating the sample into individual components. (This

takes place inside the column in the oven.)

3Detecting what compounds were in the sample. (This is

done in the detector.)

During this process, status messages from the Agilent 7820A

GC are displayed, and user changes to parameter settings

can be made through the software keypad.

Each part of this process is described in brief on the

following pages of this document. Refer to the Advanced

User Guide for more details.

Inlet

Detector

Oven

Operating panel

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