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Dionex DX-120 User Manual

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DX-120 ION CHROMATOGRAPH
OPERATOR’S MANUAL
© 1998 Dionex Corporation
Document No. 031183
Revision 03
September 1998

Table of Contents

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Dionex DX-120 Specifications

General IconGeneral
TypeIon Chromatography System
DetectorConductivity Detector
ColumnIon Chromatography Column
Pressure Range0 to 5000 psi
Weight25 kg

Summary

Introduction

1.1 About This Manual

Details manual structure, conventions, safety, and related documentation.

1.2 Related Manuals

Lists other manuals relevant to the DX-120 system components.

Description

2.1 Operating Features

Illustrates exterior and interior features of the DX-120.

2.2 Dual-Column Configuration Features

Explains column and eluent select modes for dual-column systems.

2.3 Fluid Schematics

Illustrates fluid paths for single and dual-column systems.

2.4 Control Modes

Compares Local and Remote control modes.

Operation and Maintenance

3.1 Preparing Eluents

Degassing, filtering, and pressurizing eluent reservoirs.

3.3 Operating

Startup procedures and sample injection steps.

3.7 Maintenance

Routine daily and weekly maintenance procedures.

Troubleshooting

4.1 Alarms

Details common alarm conditions and their causes.

4.2 Error Codes

Explains error codes and provides corrective actions.

4.4 Pump Issues

Covers pump priming, losing prime, not starting, and no flow.

4.5 System Performance Issues

Addresses backpressure, peak ghosting, and nonreproducible results.

Service

5.1 Replacing Tubing and Fittings

Procedures for replacing tubing and fittings.

5.4 Replacing and Cleaning Detector Components

Covers replacing DS4 cell, cleaning electrodes, and calibrating cell constant.

5.5 Pump Maintenance and Replacement

Includes cleaning check valves, replacing piston seals and pistons.

5.12 Changing the Main Power Fuses

Instructions for replacing main power fuses.

Specifications

A.1 Electrical and Environmental

Covers electrical specifications and environmental/physical parameters.

A.6 Detector and Cells

Describes detector features, conductivity cells, and DS4 stabilizer.

A.9 Valves

Details injection and column switching valves.

Installation

B.3 Rear Panel and Reservoir Connections

Details rear panel connections and eluent reservoir hookups.

B.5 Pump Setup and Calibration

Covers pump setup, priming, and flow rate calibration procedures.

B.6 Connections to Chromatography Components

Details plumbing for SRS, columns, and system configurations.

B.10 Configuration DIP Switch Settings

Explains the function of various DIP switches for system configuration.

Integrator Programming

C.4 Creating a Method

Guides users through creating an integrator Method with Time Functions.

C.5 BASIC Programming

Provides BASIC programs for automating DX-120 and autosampler operations.

Conductivity Detection

D.1 How Conductivity Is Measured

Explains the principles and measurement of solution conductivity.

D.2.3 Species Detected by Conductivity

Identifies species suitable for conductivity detection.

D.2.4 Chemical Suppression

Explains the mechanism and benefits of chemical suppression.

Glossary

Column Efficiency (N)

Measure of narrowness of analyte bands eluting from the column.

Retention Time

Time from injection to peak maximum for species identification.

Suppressor

Minimizes eluent conductivity, converts sample species to common form.

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