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Lakeshore 620 User Manual

Lakeshore 620
90 pages
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Rev. 1.2 P/N 119-001 9 April 1999
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Magnet Power Supply
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Model 620 – ±50 A, ±5 V Model 623 – ±155 A, ±30 V
Model 622 – ±125 A, ±30 V Model 647 – ±72 A, ±32 V
Lake Shore Cryotronics, Inc.
575 McCorkle Blvd.
Westerville, Ohio 43082-8888 USA
E-Mail Addresses:
sales@lakeshore.com
service@lakeshore.com
Visit Our Website:
www.lakeshore.com
Fax: (614) 891-1392
Telephone: (614) 891-2243
Methods and apparatus disclosed and described herein have been developed solely on company funds of Lake Shore Cryotronics, Inc.
No government or other contractual support or relationship whatsoever has existed which in any way affects or mitigates proprietary
rights of Lake Shore Cryotronics, Inc. in these developments. Methods and apparatus disclosed herein may be subject to U.S. Patents
existing or applied for. Lake Shore Cryotronics, Inc. reserves the right to add, improve, modify, or withdraw functions, design
modifications, or products at any time without notice. Lake Shore shall not be liable for errors contained herein or for incidental or
consequential damages in connection with furnishing, performance, or use of this material.
User’s Manual
Model 620/622/623/647
Model 620/622/623/647Model 620/622/623/647
Model 620/622/623/647
Magnet Power Supply

Table of Contents

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Lakeshore 620 Specifications

General IconGeneral
BrandLakeshore
Model620
CategoryPower Supply
LanguageEnglish

Summary

FOREWORD

PURPOSE AND SCOPE

Defines the manual's objective and coverage of the Magnet Power Supply.

HARDWARE COVERED

Lists the MPS models and configurations described in the manual.

WARNINGS, CAUTIONS, AND NOTES

Explains the meaning of safety indicators like warnings, cautions, and notes.

GENERAL INSTALLATION PRECAUTIONS

Provides essential safety guidelines for equipment installation.

ELECTROSTATIC DISCHARGE

Discusses Electrostatic Discharge hazards and necessary prevention measures.

HANDLING ELECTROSTATIC DISCHARGE SENSITIVE COMPONENTS

Details procedures for safely handling ESDS components to prevent damage.

SAFE HANDLING OF LIQUID CRYOGENS

Outlines safety measures for working with liquid helium.

MAGNET QUENCHES

Addresses safety considerations during magnet quenches.

DANGEROUS VOLTAGES

Warns about electrical hazards present inside the unit.

BEFORE YOU OPERATE THE EQUIPMENT

Covers essential pre-operation safety checks and considerations.

SAFETY SUMMARY

Summarizes critical safety precautions for operation and maintenance.

SAFETY SYMBOLS

SAFETY SYMBOLS

Explains various safety icons and their meanings used throughout the manual.

CHAPTER 1 INTRODUCTION

1.0 GENERAL

Introduces the chapter's content: features, specifications, and operating characteristics.

1.1 FEATURES

Describes the key capabilities and design aspects of the Magnet Power Supply.

1.2 SPECIFICATIONS

Details the technical parameters and performance data for the MPS models.

1.3 OPERATING CHARACTERISTICS

Explains unique MPS operational features relevant to magnet control.

1.3.1 Four-Quadrant Bi-directional Power Flow

Explains the MPS's ability to source and sink current bidirectionally.

1.3.2 Low Noise, High Stability Current Output

Highlights the precision and stability of the MPS current regulation.

1.3.3 High Efficiency, Air Cooled, Compact Design

Discusses the MPS's efficient power conversion and cooling system.

CHAPTER 2 INITIAL SETUP AND CONNECTIONS

2.1 INSPECTING AND UNPACKING

Guides users on receiving, inspecting, and unpacking the MPS unit.

2.2 MPS MOUNTING

Provides instructions for installing the MPS in racks or on a bench.

2.3 ENVIRONMENTAL REQUIREMENTS

Specifies the recommended operating conditions like temperature and humidity.

2.4 CONNECTING THE MPS TO POWER

Details power source requirements and electrical connections for the MPS.

2.5 POWER UP

Describes the MPS startup sequence, initial checks, and front panel indicators.

2.6 MULTIPLE AUTO-PARALLEL SETUP

Guides connecting multiple MPS units for increased output current capability.

2.7 POST-INSTALLATION INSTRUCTIONS

Covers essential checks to perform after the initial setup is complete.

2.8 SYSTEM SHUTDOWN AND REPACKAGING FOR STORAGE OR SHIPMENT

Provides procedures for safely shutting down and preparing the unit for storage or shipment.

2.9 RETURNING EQUIPMENT TO LAKE SHORE

Outlines the process for returning the MPS for repair or replacement.

CHAPTER 3 OPERATION

3.0 GENERAL

Introduces the chapter covering MPS operation and controls.

3.1 THE MPS FRONT PANEL

Describes the MPS front panel interface, buttons, and display.

3.2 POWER UP

Details the MPS startup sequence and initial display states.

3.3 NORMAL DISPLAY FOR MANUAL MODE

Explains the default screen and parameters for manual operation.

3.4 NORMAL DISPLAY FOR MANUAL PSH CONTROL

Describes the display for manual persistence switch heater control.

3.5 NORMAL DISPLAY FOR AUTOMATIC PSH CONTROL

Explains the display for automatic persistence control of magnets.

3.6 FUNCTION MENUS

Covers accessing and navigating the MPS setup menus.

3.7 MANUAL PERSISTENCE CONTROL EXAMPLE

Provides a step-by-step guide for manual PSH operation.

3.8 AUTOMATIC PERSISTENCE CONTROL EXAMPLE

Illustrates setting up and running an automatic PSH cycle.

3.9 DITHERING IN AUTOMATIC MODE

Explains the dithering feature for fine current adjustment in automatic mode.

CHAPTER 4 REMOTE OPERATION

4.0 GENERAL

Introduces remote operation capabilities via computer interfaces.

4.1 IEEE-488 INTERFACE

Covers interfacing the MPS with computers using the IEEE-488 standard.

4.2 SERIAL I/O INTERFACE

Details interfacing the MPS via the RS-232C serial port.

4.3 SUMMARY OF IEEE-488/SERIAL INTERFACE COMMANDS

Lists all available remote commands for interface control.

CHAPTER 5 ERROR MESSAGES AND TROUBLESHOOTING

5.0 GENERAL

Introduces the chapter on diagnostics and resolving MPS errors.

5.1 SOFTWARE ERROR MESSAGES

Lists and explains various software-detected faults and error conditions.

5.2 Factory Default Settings

Provides a list of factory preset parameters and how to reinitialize them.

5.3 CALIBRATION

Details the procedure for calibrating the MPS current and voltage outputs.

5.4 PERFORMANCE TEST

Outlines tests to verify MPS functionality and accuracy.

5.5 REAR PANEL CONNECTOR DETAIL

Illustrates and defines the MPS rear panel connectors.

5.6 IEEE-488 INTERFACE CONNECTOR

Shows the pinout for the IEEE-488 interface connector.

5.7 SERIAL INTERFACE CABLE AND ADAPTERS

Provides wiring diagrams for serial interface cables and adapters.

CHAPTER 6 OPTIONS AND ACCESSORIES

6.0 GENERAL

Introduces optional features and accessories available for the MPS.

6.1 MODEL 6224 IEEE-488/SERIAL INTERFACE

Explains the installation and use of the communication interface option.

6.2 Model 6226/6476 Input Card Operations

Covers the Liquid Helium Level and Gaussmeter Input Card.

6.3 MODEL 6228 AND 6228-8MUX PERSISTENT SWITCH HEATER OUTPUT

Describes the Persistent Switch Heater (PSH) option for magnet control.

6.4 MODEL 6228-2 PERSISTENT SWITCH HEATER OUTPUT

Describes the option for controlling a second persistent switch.

6.5 ACCESSORIES

Lists available accessories that complement the MPS.

APPENDIX A UNITS FOR MAGNETIC PROPERTIES

Conversion from CGS to SI Units

Provides conversion factors for magnetic units between CGS and SI systems.

APPENDIX B MAINFRAME CONTROL BUS OPERATION

B1.0 GENERAL

Introduces the mainframe control bus operation and its key elements.

B2.0 CONTROL BUS SERIAL INTERFACE SPECIFICATIONS

Details serial interface configurations for RS-232C and RS-485.

B3.0 CONTROL BUS SERIAL INTERFACE CONNECTOR

Describes the physical connector and pin assignments for the serial interface.

B4.0 CONTROL BUS SERIAL INTERFACE CONFIGURATION

Guides setting up the serial interface configuration via DIP switches.

B5.0 SELECTING THE CONTROL BUS SERIAL INTERFACE ADDRESS

Explains how to assign unique addresses for multi-drop bus operation.

B6.0 CONTROL BUS SERIAL INTERFACE OPERATION

Describes how to communicate with the mainframe via the serial control bus.

B7.0 CONTROL BUS SERIAL INTERFACE SAMPLE PROGRAM

Provides a sample program for serial bus communication.

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