Lake Shore 620 User manual

Rev. 1.2 P/N 119-001 9 April 1999
Power
Fault
Persistent
Switch Heater
Magnet Power Supply
7
Local
Esc
9
8
7
Local
Esc
9
8
4
Remote
6
5
1
3
2
0
Enter
+/-
.
Function
Menu Next
Menu Normal
Display
Cursor
Data Entry
Functions
Mode
Output
Inhibit
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:
[e-mail]
[e-mail]
Visit Our Website:
www.lakeshore.com
Fax: [phone]
Telephone: [phone]
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

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual
A
LIMITED WARRANTY
Lake Shore Cryotronics, Inc. (henceforth Lake Shore), the manufacturer, warrants the instrument to be free
from defects in material and workmanship for a period of twelve months from the date of shipment. During the
warranty period, under authorized return of instruments or component parts to Lake Shore freight prepaid, the
company will repair, or at its option replace, any part found to be defective in material or workmanship, without
charge to the Owner for parts, service labor or associated customary shipping cost. Replacement or repaired
parts will be warranted for only the unexpired portion of the original warranty.
All products are thoroughly tested and calibrated to published specifications prior to shipment. Calibration
Certifications are offered for six month periods only. Where such documentation must be updated, a
re-certification service is offered by Lake Shore at a reasonable cost.
LIMITATION OF WARRANTY
This warranty is limited to Lake Shore products purchased and installed in the United States, or Internationally
through our approved distribution agents. This same protection will extend to any subsequent owner during
the warranty period. It does not apply to damage resulting from improper or inadequate maintenance,
unauthorized modification or misuse, operation outside of the environmental specifications, or from buyer-
supplied software interfacing. It does not apply to damage caused by accident, misuse, fire, flood or Acts of
God, or from failure to properly install, operate, or maintain the product in accordance with the printed
instruction provided.
This warranty is in lieu of any other warranties, expressed or implied, including merchantability or fitness for a
particular purpose, which are expressly excluded. the owner agrees that Lake Shore’s liability with respect to
this product shall be set forth in this warranty, and incidental or consequential damages are expressly
excluded.
CERTIFICATION
Lake Shore certifies that this product has been inspected and tested in accordance with its published
specifications and that this product met its published specifications at the time of shipment. The accuracy and
calibration of this product at the time of shipment are traceable to the United States National Institute of
Standards and Technology (NIST); formerly known as the National Bureau of Standards (NBS), or to a
recognized natural standard.
TRADEMARK ACKNOWLEDGMENT
Many manufacturers and sellers claim designations as trademarks to distinguish their products. Where those
designations appear in this manual and Lake Shore was aware of a trademark claim, they appear with initial
capital letters and a proceeding ™ or ®symbol.
CalCurve™, Carbon-Glass™, Cernox™, Duo-Twist™, Gamma Probe™, Quad-Lead™,
and Quad-Twist™are trademarks of Lake Shore Cryotronics, Inc.
Kapton®is a trademark of 3M.
Stycast®is a trademark of Emerson & Cuming.
Teflon®is a trademark of DuPont De Nemours.
QuickBasic®is a trademark of Microsoft Corporation.
Copyright © 1995 – 1999 by Lake Shore Cryotronics, Inc. All rights reserved. No portion of this manual may be
reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, without the express written permission of Lake Shore.

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual
Table of Contents i
TABLE OF CONTENTS
Chapter/Paragraph Title Page
List of Illustrations ......................................................................................................................................iv
List of Tables..............................................................................................................................................iv
Foreword .................................................................................................................................................... v
Purpose and Scope ................................................................................................................................ v
Hardware Covered.................................................................................................................................. v
Warnings, Cautions, and Notes .............................................................................................................. v
General Installation Precautions ............................................................................................................. v
Electrostatic Discharge ........................................................................................................................... v
Handling Electrostatic Discharge Sensitive Components....................................................................vi
Safe Handling of Liquid Cryogens .......................................................................................................vi
Magnet Quenches ...............................................................................................................................vi
Dangerous Voltages ...............................................................................................................................vi
Before You Operate the Equipment.......................................................................................................vii
Safety Summary ....................................................................................................................................vii
Safety Symbols ..................................................................................................................................... viii
1 INTRODUCTION ....................................................................................................................................1-1
1.0 General ...................................................................................................................................1-1
1.1 Features..................................................................................................................................1-1
1.2 Specifications..........................................................................................................................1-2
1.3 Operating Characteristics .......................................................................................................1-4
1.3.1 True, Four-Quadrant Bidirectional Power Flow ...................................................................1-4
1.3.2 Low Noise, High Stability Current Regulated Output...........................................................1-5
1.3.3 Highly Efficient, Air-Cooled, Compact Unit .......................................................................... 1-5
2 INITIAL SETUP AND CONNECTIONS ..................................................................................................2-1
2.1 Inspecting and Unpacking ......................................................................................................2-1
2.2 MPS Mounting ........................................................................................................................2-1
2.3 Environmental Requirements .................................................................................................2-1
2.4 Connecting the MPS to Power................................................................................................2-1
2.4.1 Power and Ground Requirements .......................................................................................2-2
2.4.2 MPS Input Power Ratings....................................................................................................2-2
2.4.3 Input Power Connections ....................................................................................................2-2
2.5 Power Up ................................................................................................................................2-3
2.5.1 Magnet Cable Connections .................................................................................................2-3
2.5.2 Shielding, Grounding, and Noise .........................................................................................2-4
2.5.3 MPS Remote Inhibit and Fault Indicator Connections.........................................................2-4
2.5.4 AC On Indicator ...................................................................................................................2-4
2.5.5 OVP Connection..................................................................................................................2-4
2.5.6 MPS Analog Current and Voltage Monitoring Connections.................................................2-5
2.5.7 External Current Programming............................................................................................2-5
2.5.8 Remote Sense Connections................................................................................................ 2-5
2.6 Multiple Auto-Parallel Setup....................................................................................................2-6
2.6.1 Multiple MPS Remote Inhibit Mode .....................................................................................2-8
2.7 Post-Installation Instructions...................................................................................................2-9
2.8 System Shutdown and Repackaging for Storage or Shipment...............................................2-9
2.9 Returning Equipment to Lake Shore.......................................................................................2-9
3 OPERATION...........................................................................................................................................3-1
3.0 General ...................................................................................................................................3-1
3.1 The MPS Front Panel .............................................................................................................3-1
3.2 Power UP................................................................................................................................3-2

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual
ii Table of Contents
TABLE OF CONTENTS (Continued)
Chapter/Paragraph Title Page
3.3 Normal Display for Manual Mode ........................................................................................... 3-2
3.4 Normal Display for Manual PSH Control ................................................................................ 3-3
3.5 Normal Display for Automatic PSH Control............................................................................ 3-3
3.6 Function Menus...................................................................................................................... 3-5
3.6.1 Function Menu 1 ................................................................................................................. 3-5
3.6.1.1 Automatic Mode / Manual Mode ...................................................................................... 3-5
3.6.1.2 Interface Setup Screen .................................................................................................... 3-5
3.6.1.3 Step Limit/Zero Screen .................................................................................................... 3-6
3.6.1.4 Instrument Setup Screen .................................................................................................3-6
3.6.2 Function Menu 2 ................................................................................................................. 3-7
3.6.2.1 Outputs Only Screen........................................................................................................ 3-8
3.6.2.2 LHe Level......................................................................................................................... 3-8
3.6.2.3 Field ................................................................................................................................. 3-8
3.6.2.4 PSH Setup ....................................................................................................................... 3-8
3.6.3 Function Menu 3 ................................................................................................................. 3-8
3.6.3.1 Delays Setup Screen ....................................................................................................... 3-8
3.6.3.2 Delays Setup Screen with Dithering ................................................................................ 3-9
3.7 Manual Persistence Control Example .................................................................................... 3-9
3.8 Automatic Persistence Control Example................................................................................ 3-9
3.9 Dithering in Automatic Mode ................................................................................................ 3-11
4 REMOTE OPERATION.......................................................................................................................... 4-1
4.0 General................................................................................................................................... 4-1
4.1 IEEE-488 Interface ................................................................................................................. 4-1
4.1.1 IEEE-488 Interface Settings................................................................................................ 4-1
4.1.2 IEEE-488 Command Structure ........................................................................................... 4-2
4.1.2.1 Bus Control Commands................................................................................................... 4-2
4.1.2.2 Common Commands....................................................................................................... 4-2
4.1.2.3 Interface and Device Specific Commands....................................................................... 4-2
4.1.3 Status Registers.................................................................................................................. 4-2
4.1.3.1 Status Byte and Service Request Enable Registers........................................................ 4-3
4.1.3.2 Standard Event and Standard Event Status Registers .................................................... 4-3
4.1.4 Example IEEE Setup and Program..................................................................................... 4-4
4.1.4.1 GPIB Board Installation.................................................................................................... 4-4
4.1.4.2 Run the Example QuickBasic Program ........................................................................... 4-4
4.1.5 Notes On Using the IEEE Interface .................................................................................... 4-5
4.2 Serial I/O Interface ................................................................................................................. 4-7
4.2.1 Serial Interface Hardware Configuration ............................................................................. 4-8
4.2.2 Serial Interface Settings ...................................................................................................... 4-8
4.2.3 Sample BASIC Serial Interface Program ............................................................................ 4-8
4.2.4 Notes on Using the Serial Interface .................................................................................... 4-9
4.3 Summary of IEEE-488/Serial Interface Commands............................................................. 4-10
4.3.1 Operational Commands Description ................................................................................. 4-11
4.3.2 Interface Commands Description ..................................................................................... 4-13
4.3.3 Ramping Commands Description ..................................................................................... 4-14
4.3.4 Current Zero Commands Description ............................................................................... 4-15
4.3.5 Current Step Limit Commands Description ...................................................................... 4-16
4.3.6 Computed Field Commands Description .......................................................................... 4-17
4.3.7 Common Commands Description..................................................................................... 4-18

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual
Table of Contents iii
TABLE OF CONTENTS (Continued)
Chapter/Paragraph Title Page
5 ERROR MESSAGES AND TROUBLESHOOTING ...............................................................................5-1
5.0 General ...................................................................................................................................5-1
5.1 Software Error Messages .......................................................................................................5-1
5.2 Factory Default Settings..........................................................................................................5-4
5.3 Calibration...............................................................................................................................5-5
5.4 Performance Test ...................................................................................................................5-6
5.5 Rear Panel Connector Details ................................................................................................5-8
5.6 IEEE-488 Interface Connector................................................................................................5-9
5.7 Serial Interface Cable and Adapters.......................................................................................5-9
6 OPTIONS AND ACCESSORIES ............................................................................................................6-1
6.0 General ...................................................................................................................................6-1
6.1 Model 6224 IEEE-488/Serial Interface....................................................................................6-1
6.2 Model 6226/6476 Liquid Helium Level and Gaussmeter Input Card ......................................6-1
6.2.1 Hall Sensor Mounting Considerations - Models HGCT-3020 and HGCA-3020......................6-2
6.2.2 The Model MSA-410 and MST-410 Hall Sensors...................................................................6-3
6.2.3 Connections ............................................................................................................................6-3
6.2.4 Installation...............................................................................................................................6-3
6.2.5 LHe Level................................................................................................................................6-4
6.2.5.1 LHe Level Operation ...............................................................................................................6-4
6.2.5.2 Field Probe Setting and Calibration ........................................................................................6-5
6.2.6 Level Sensor Calibration.........................................................................................................6-5
6.2.7 Model 6226/6476 IEEE-488 Remote Operation Commands..................................................6-6
6.3 Model 6228 and 6228-8MUX Persistent Switch Heater Output..............................................6-9
6.3.1 Installation...............................................................................................................................6-9
6.3.2 Model 6228 Operation ............................................................................................................6-9
6.3.3 Model 6228-8MUX Operation ............................................................................................... 6-10
6.3.4 PSH Card Voltage Constraints .............................................................................................6-10
6.3.5 Model 6228 Remote Operation Commands .........................................................................6-11
6.4 Model 6228-2 Persistent Switch Heater Output....................................................................6-12
6.4.1 Model 6228-2 Remote Operation Commands......................................................................6-13
6.5 Accessories ..........................................................................................................................6-14
APPENDIX A – UNITS FOR MAGNETIC PROPERTIES .......................................................................... A-1
APPENDIX B – MAINFRAME REMOTE OPERATION ............................................................................. B-1
B1.0 General .................................................................................................................................. B-1
B2.0 Control Bus Serial Interface Specifications............................................................................ B-1
B3.0 Control Bus Serial Interface Connector ................................................................................. B-1
B4.0 Control Bus Serial Interface Configuration ............................................................................ B-2
B5.0 Selecting the Control Bus Serial Interface Address............................................................... B-2
B6.0 Control Bus Serial Interface Operation .................................................................................. B-3
B7.0 Control Bus Serial Interface Sample Program....................................................................... B-4