Thermo Scientific Dionex Easion User manual

Dionex Easion Ion Chromatography
System Operator’s Manual
Document No. 155028
Revision 01
August 2020

© 2020 by Thermo Fisher Scientific Inc. All rights reserved.
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subsidiaries.
Thermo Fisher Scientific Inc. provides this document to its customers with a product
purchase to use in the product operation. This document is copyright protected and
any reproduction of the whole or any part of this document is strictly prohibited,
except with the written authorization of Thermo Fisher Scientific Inc.
The contents of this document are subject to change without notice. All technical
information in this document is for reference purposes only. System configurations
and specifications in this document supersede all previous information received by
the purchaser.
Thermo Fisher Scientific Inc. makes no representations that this document is
complete, accurate or error-free and assumes no responsibility and will not be
liable for any errors, omissions, damage or loss that might result from any use of
this document, even if the information in the document is followed properly.
This document is not part of any sales contract between Thermo Fisher Scientific
Inc. and a purchaser. This document shall in no way govern or modify any Terms and
Conditions of Sale, which Terms and Conditions of Sale shall govern all conflicting
information between the two documents.
Revision history: Revision 01 released August 2020; new product support
Software version: Chromeleon 7.2.10 MUa and later
For Research Use Only. Not for use in diagnostic procedures.

Doc. 155028-01 08/20 i
1 • Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Overview of the Dionex Easion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 User Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2.1 About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2.2 Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3.1 Safety Messages and Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3.2 Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4 Regulatory Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4.1 Notice on Lifting and Handling of Thermo Scientific
Instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4.2 Notice on the Proper Use of Thermo Scientific Instruments . . . 7
1.4.3 Notice on the Susceptibility to Electromagnetic Transmission . 7
1.4.4 WEEE Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2•Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Operating Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1.1 Front Door and Top Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1.2 Component Mounting Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1.3 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.2 Fluid Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Contents

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2.3 System Component Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2.3.1 Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2.3.2 Pressure Transducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
2.3.3 Injection Valve with Sample Loop . . . . . . . . . . . . . . . . . . . . . .19
2.3.4 Dionex CRS 500 Suppressor . . . . . . . . . . . . . . . . . . . . . . . . . . .20
2.3.5 Displacement Chemical Regeneration (DCR) . . . . . . . . . . . . . .20
2.3.6 Conductivity Cell and Dionex DS5 Detection Stabilizer . . . . .22
2.4 Chromeleon Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
2.4.1 The Chromeleon ePanel Set . . . . . . . . . . . . . . . . . . . . . . . . . . .23
2.4.2 Software Control Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
2.4.3 System Wellness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
3 • Operation and Maintenance . . . . . . . . . . . . . . . . . . . . . . . .27
3.1 Operation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
3.2 Turning On the Dionex Easion Power . . . . . . . . . . . . . . . . . . . . . . . . . .28
3.3 Connecting to Chromeleon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
3.4 Preparing the Eluent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
3.5 Preparing the Regenerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
3.6 Priming the Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
3.7 Equilibrating the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
3.8 Verifying Operational Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
3.9 Configuring Standby Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
3.10 Preparing Samples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
3.10.1 Collecting and Storing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Contents
Doc. 155028-01 08/20 iii
3.10.2 Pretreating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.10.3 Diluting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.11 Processing Samples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
3.11.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
3.11.2 Manual Sample Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
3.11.3 Automated (Batch) Sample Processing . . . . . . . . . . . . . . . . . . 40
3.11.4 Loading and Injecting Samples with an Autosampler . . . . . . . 41
3.11.5 Loading and Injecting Samples with a Syringe . . . . . . . . . . . . 42
3.11.6 Example Chromeleon Commands for Loading and
Injecting Samples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
3.12 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
4 • Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
4.1 Alarms and Error Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
4.2 Liquid Leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
4.3 Pump Difficult to Prime or Loses Prime . . . . . . . . . . . . . . . . . . . . . . . . 53
4.4 Pump Does Not Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
4.5 No Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
4.6 Erratic Flow/Pressure Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
4.7 Excessive System Backpressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
4.8 Peak “Ghosting” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
4.9 Nonreproducible Peak Height or Retention Time . . . . . . . . . . . . . . . . . 56
4.10 Abnormal Retention Time or Selectivity . . . . . . . . . . . . . . . . . . . . . . . 56
4.11 No Detector Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

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4.12 High Detector Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
4.13 Baseline Noise or Drift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
5•Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
5.1 Diagnostics and Calibrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
5.1.1 Wellness Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
5.1.2 Calibrating the Pressure Transducer . . . . . . . . . . . . . . . . . . . . .63
5.1.3 Calibrating the Flow Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
5.2 Replacing Tubing and Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
5.3 Isolating a Restriction in the Liquid Plumbing . . . . . . . . . . . . . . . . . . . .67
5.4 Cleaning Eluent Bottles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
5.5 Changing the Sample Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
5.6 Replacing Pump Check Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
5.7 Cleaning Pump Check Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
5.8 Replacing a Pump Piston Seal and Backup Seal . . . . . . . . . . . . . . . . . .73
5.9 Replacing a Pump Piston . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
5.10 Replacing the Waste Valve Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
5.11 Rebuilding the Injection Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
5.12 Replacing the Conductivity Cell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
5.13 Replacing the Suppressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
5.14 Changing the Main Power Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
A • Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85
A.1 Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85

Contents
Doc. 155028-01 08/20 v
A.2 Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
A.3 Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
A.4 Front and Rear Panel LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
A.5 Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
A.6 Injection Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
A.7 Suppressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
A.8 Conductivity Detector and Flow Cell . . . . . . . . . . . . . . . . . . . . . . . . . . 88
A.9 Autosampler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
A.10 System Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
B • Reordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
C • TTL and Relay Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
C.1 Connecting a TTL or Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
C.2 Selecting TTL Input Control Modes and Functions . . . . . . . . . . . . . . . 95
C.3 Configuring Relay Output 1 or 2 to Respond to the Pump Flow . . . . . 97
C.4 Controlling TTL and Relay Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
D•FAQ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
D.1 How do I connect to the Dionex AS-DV? . . . . . . . . . . . . . . . . . . . . . . . 99
D.2 Why are the retention times moving? . . . . . . . . . . . . . . . . . . . . . . . . . . 99
D.3 How do I adjust retention times? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
D.4 When should I remake standards? . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
D.5 When should I remake eluents? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

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D.6 How do I shut off the system? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100
D.7 How do I store columns? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100
D.8 How do I know when a column is dirty? . . . . . . . . . . . . . . . . . . . . . . .100
D.9 How do I clean a column? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101
D.10 Why is the conductivity high? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101
E • Introduction to Ion Chromatography (IC) . . . . .103
F • Glossary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105

Doc. 155028-01 08/20 1
1 • Introduction
1.1 Overview of the Dionex Easion
The Thermo Scientific™Dionex™Easion™Ion Chromatography System (Dionex
Easion) performs isocratic ion analyses using suppressed conductivity detection.
The Dionex Easion is an integrated ion chromatography system consisting of a
pump, an injection valve, and a conductivity cell. Other system components
(guard column, separator column, and suppressor) are ordered separately.
The Dionex Easion is controlled with a PC (personal computer) running
Windows®10 or Windows®8.1 operating system and the Thermo Scientific™
Dionex™Chromeleon™7 Chromatography Data System (version 7.2.10 MUa and
later). Chromeleon provides complete instrument control, data acquisition, and
data management.
For communication between the Dionex Easion and the PC on which Chromeleon
is installed, the Dionex Easion must be connected to a USB (Universal Serial Bus)
port on either the PC or an external USB hub. For more information, refer to
Thermo Scientific Dionex Easion Ion Chromatography System Installation
Instructions (Document No. 155032).
NOTE For an introduction to basic ion chromatography
concepts, see Appendix E.

Dionex Easion Operator’s Manual
2Doc. 155028-01 08/20
1.2 User Documentation
1.2.1 About This Manual
The electronic version (the PDF file) of the Dionex Easion operator’s
manual contains numerous hypertext links that can take you to other
locations within the file. These links include:
•Table of contents entries
•Index entries
•Cross-references (underlined in blue) to sections, figures, and tables
If you are not familiar with how to navigate PDF files, refer to the
AdobeAcrobator Adobe ReaderHelp for assistance.
Chapter 1
Introduction Introduces the Dionex Easion; explains the
conventions used in this manual, including safety-
related information.
Chapter 2
Description Describes Dionex Easion operating features, the
chromatographic flow path, and the software
required for Dionex Easion control.
Chapter 3
Operation and
Maintenance
Provides operating instructions for the Dionex
Easion and describes routine preventive
maintenance procedures.
Chapter 4
Troubleshooting Lists problems and presents step-by-step
procedures for how to isolate and eliminate the
cause of each problem.
Chapter 5
Service Provides step-by-step instructions for routine
service and parts replacement procedures that the
user can perform.
Appendix A
Specifications Provides specifications and installation site
requirements for the Dionex Easion.
Appendix B
Reordering
Information
Lists spare parts for the Dionex Easion.

1 • Introduction
Doc. 155028-01 08/20 3
1.2.2 Related Documentation
The following documents are available for download from the Thermo
Fisher Scientific website or by contacting your local office.
•Thermo Scientific Dionex Easion Ion Chromatography System
Installation Instructions (Document No. 155032)
•Thermo Scientific Dionex AS-DV Autosampler Operator’s Manual
(Document No. 065259)
•Manuals for columns and other consumable products, including:
Thermo Scientific Dionex CRS 500 Product Manual (Document No.
031727)
Thermo Scientific Dionex OnGuard II Cartridges Product Manual
(Document No. 031688)
Thermo Scientific Dionex Guardcap Product Manual (Document No.
065705)
•Chromeleon 7 Installation Guide (Document No. 7229.0003)
Appendix C
TTL and Relay
Control
Describes the Dionex Easion TTL and relay
control features.
Appendix D
FAQ Provides answers to frequently asked questions
about Dionex Easion operation.
Appendix E
Introduction to Ion
Chromatography
Describes basic ion chromatography concepts.
Appendix F
Glossary Provides definitions of terms commonly used in
ion chromatography.

Dionex Easion Operator’s Manual
4Doc. 155028-01 08/20
1.3 Safety Information
The Dionex Easion is manufactured by Thermo Fisher Scientific (Shanghai)
Instruments Company, Ltd. at the following location:
Jinqiao Export Processing Zone, Pu Dong
T71-6 No. 211, Qin Qiao Road
201206 Shanghai
People’s Republic of China
The Dionex Easion is designed for IC (ion chromatography) applications and
should not be used for any other purpose. Operation of a Dionex Easion in a
manner not specified by Thermo Fisher Scientific may result in personal injury.
If there is a question regarding appropriate usage, contact Technical Support for
Dionex products before proceeding:
•In the U.S. and Canada, call 1-800-532-4752 and select option 2.
•Outside the U.S. and Canada, call the nearest Thermo Fisher Scientific office.
1.3.1 Safety Messages and Notes
This manual contains warnings and precautionary statements that can
prevent personal injury and/or damage to the Dionex Easion when
properly followed. Safety messages appear in bold type and are
accompanied by icons, as shown below.
Indicates an imminently hazardous situation which, if not avoided, will
result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided, may
result in minor or moderate injury. Also used to identify a situation or
practice that may seriously damage the instrument, but will not cause
injury.
Indicates that the function or process of the instrument may be
impaired. Operation does not constitute a hazard.

1 • Introduction
Doc. 155028-01 08/20 5
Messages d'avertissement en français
Warnhinweise in Deutsch
Notes
Informational messages also appear throughout this manual. These are
labeled NOTE and are in bold type:
NOTE NOTES call attention to certain information. They
alert you to an unexpected result of an action,
suggest how to optimize instrument performance,
and so on.
Signale une situation de danger immédiat qui, si elle n'est pas évitée,
entraînera des blessures graves à mortelles.
Signale une situation de danger potentiel qui, si elle n'est pas évitée,
pourrait entraîner des blessures graves à mortelles.
Signale une situation de danger potentiel qui, si elle n'est pas évitée,
pourrait entraîner des blessures mineures à modérées. Également
utilisé pour signaler une situation ou une pratique qui pourrait
gravement endommager l'instrument mais qui n'entraînera pas de
blessures.
Bedeutet unmittelbare Gefahr. Mißachtung kann zum Tod oder
schwerwiegenden Verletzungen führen.
Bedeutet eine mögliche Gefährdung. Mißachtung kann zum Tod oder
schwerwiegenden Verletzungen führen.
Bedeutet eine mögliche Gefährdung. Mißachtung kann zu kleineren
oder mittelschweren Verletzungen führen. Wird auch verwendet, wenn
eine Situation zu schweren Schäden am Gerät führen kann, jedoch
keine Verletzungsgefahr besteht.

Dionex Easion Operator’s Manual
6Doc. 155028-01 08/20
1.3.2 Safety Symbols
These symbols appear on the Dionex Easion or on Dionex Easion labels:
1.4 Regulatory Compliance
Thermo Fisher Scientific performs complete testing and evaluation of its products
to ensure full compliance with applicable domestic and international regulations.
When the Dionex Easion is delivered to you, it meets all pertinent international
electromagnetic compatibility (EMC), safety, and material compliance
requirements and directives.
Changes that you make to your system may void compliance with one or more of
these requirements and directives. Changes to your system include replacing a
part or adding components, options, or peripherals not specifically authorized and
qualified by Thermo Fisher Scientific. To ensure continued compliance with these
requirements and directives, replacement parts and additional components,
options, and peripherals must be ordered from Thermo Fisher Scientific or one of
its authorized representatives.
For additional details, please refer to the CE Declaration of Conformity available
on the Thermo Fisher Scientific website.
Alternating current
Primary protective conductor terminal
Secondary protective conductor terminal
Power supply is on
Power supply is off
Indicates a potential hazard. Refer to this manual for an
explanation of the hazard and how to proceed.

1 • Introduction
Doc. 155028-01 08/20 7
1.4.1 Notice on Lifting and Handling of Thermo Scientific
Instruments
For your safety, and in compliance with international regulations, the
physical handling of this Thermo Fisher Scientific instrument requires a
team effort to lift and/or move the instrument. This instrument is too
heavy and/or bulky for one person alone to handle safely.
1.4.2 Notice on the Proper Use of Thermo Scientific
Instruments
In compliance with international regulations: This instrument must be
used in the manner specified by Thermo Fisher Scientific to ensure
protections provided by the instrument are not impaired. Deviations from
specified instructions on the proper use of the instrument include changes
to the system and parts replacement. Accordingly, order replacement parts
from Thermo Fisher Scientific or one of its authorized representatives.
1.4.3 Notice on the Susceptibility to Electromagnetic
Transmission
Your instrument is designed to work in a controlled electromagnetic
environment. Do not use radio frequency transmitters, such as mobile
phones, in close proximity to the instrument.
For manufacturing location, see the label on the instrument.
1.4.4 WEEE Compliance
This product is required to comply with the European Union’s Waste
Electrical & Electronic Equipment (WEEE) Directive 2012/19/EU. It is
marked with the following symbol:
This symbol indicates that the equipment must not be thrown into general
waste and should be collected separately and processed in accordance
with local and state requirements.

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Conformité DEEE
Ce produit est conforme avec la directive européenne (2012/19/EU) des
Déchets d'Equipements Electriques et Electroniques (DEEE). Il est
marqué par le symbole suivant:
Ce symbole indique que l'équipement ne doit pas être jeté avec les déchets
ordinaires, mais doit être collecté séparément et traité conformément aux
règlementations locales et nationales.
WEEE Konformität
Dieses Produkt entspricht der EU Waste Electrical & Electronic
Equipment (WEEE) Richtlinie 2012/19/EU. Es ist mit dem folgenden
Symbol gekennzeichnet:
Instrumente mit diesem Zeichen sind nicht für den normallen Abfall
bestimmt; Entsorgung soll den lokalen Vorschriften entsprechend
ausgeführt werden.

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2 • Description
2.1 Operating Features
2.1.1 Front Door and Top Cover
Figure 2-1 illustrates the front door and top cover of the Dionex Easion.
Figure 2-1. Dionex Easion
Eluent Bottle
Regenerant Bottle
Injection Port
Status LEDs

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LEDs
Three status LEDs (described below) are on the Dionex Easion front door.
Other status information and alarm messages are displayed in the audit
trail in Chromeleon. For more information about audit trail messages, see
Section 4.1.
Injection Port
When the injection port is connected to the injection valve inside the
Dionex Easion, the sample to be analyzed is injected into the injection
port using a syringe. For automated sample injections, the Dionex Easion
injection valve can be connected to a Thermo Scientific™Dionex™AS-
DV Autosampler instead of the injection port. For more information about
sample injection, see Section 3.11.5.
Eluent and Regenerant Bottles
The Dionex Easion top cover is molded to hold one eluent bottle
assembly (P/N 062510) and one regenerant bottle assembly (for anion
analyses: P/N 068222; for cation analyses: P/N 057713).
•Eluent carries the sample through the Dionex Easion and facilitates
the ion separation process. The type of eluent used depends on the
analyses performed. For example, a Dionex Easion configured for
LED Label If On (Green) If Flashing
Power Dionex Easion power is on Does not flash
Ready System check passed, but
sequence not yet started
(LED remains on until run
starts or sequence is aborted)
System check failed (occurs if
system check executes for
10 minutes without success)
Run Running/acquiring data Error/alarm/fault (including
injection valve position)

2 • Description
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anion analyses uses carbonate eluent, while a Dionex Easion
configured for cation analyses uses methanesulfonic acid (MSA)
eluent.
•Regenerant renews the ability of the suppressor to suppress eluent
conductivity. A Dionex Easion configured for anion analyses uses
dilute sulfuric acid regenerant. A Dionex Easion configured for cation
analyses uses tetrabutylammonium hydroxide (TBAOH) regenerant.
For more information about suppressor regeneration, see
Section 2.3.5.
2.1.2 Component Mounting Panel
Figure 2-2 shows the components installed on the component panel
behind the Dionex Easion front door.
Figure 2-2. Dionex Easion Component Mounting Panel
Suppressor
Injection Valve
Pressure
Transducer
Pump Heads
1
2
3
4
5
6
7
8
Separator Column
Guard Column
Tubing Chase
Conductivity Cell
(in Dionex DS5
Detection Stabilizer)
1
2
5
46
7
3
89Backpressure
Tubing
9

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Conductivity Cell
The flow-through heated conductivity cell measures the electrical
conductance of analyte ions as they pass through the cell. A heat
exchanger inside the cell regulates the temperature to 40 °C (104 °F). The
cell is housed inside a Thermo Scientific™Dionex™DS5 Detection
Stabilizer (P/N 067761). For more information about the conductivity cell
and Dionex DS5 Detection Stabilizer, see Section 2.3.1.
Suppressor
The suppressor reduces the eluent conductivity and enhances the
conductivity of the sample ions, thereby increasing detection sensitivity.
The Thermo Scientific™Dionex™Chemically Regenerated Suppressor
(Dionex CRS™500) is recommended for use with the Dionex Easion. For
more information about suppressors, see Section 2.3.4.
Separator and Guard Columns
Both the separator and guard columns are packed with resin and perform
the separation of the sample ions. The main function of the guard column
is to trap contaminants and particulates that might damage the separator
column.
Pressure Transducer
The pressure transducer measures the system backpressure. For more
information about the pressure transducer, see Section 2.3.2.
Pump Heads
The Dionex Easion includes a dual-piston serial pump. The flow rate can
be set from 0.01 mL/min to 5.00 mL/min. However, for optimum
performance, set the flow rate to between 0.20 and 3.00 mL/min. Setting
the flow rate to 0.00 mL/min turns off the pump. For more information
about the pump, see Section 2.3.1.
Injection Valve
The injection valve is a six-port, electrically-activated valve. For more
information about the injection valve, see Section 2.3.3.