Lake Shore 625 Manuals

Manuals and User Guides for Lake Shore 625. We have 1 Lake Shore 625 manual available for free PDF download: User Manual

Lake Shore 625 User Manual

Lake Shore 625 User Manual (132 pages)

Superconducting Magnet Power Supply

Brand: Lake Shore | Category: Power Supply | Size: 4 MB

Table of Contents

Table of Contents

9
- Introduction
  
  13
  - General
    13
  - Description
    13
  - Model 625 Front Panel
    15
    
    Specifications
    16
    
    Safety Summary
    19
    
    Safety Symbols
    19
- Magnet System Design
  
  21
  - General
    21
  - Superconducting Materials
    21
  - Superconducting Magnets
    21
  - Superconducting Magnet Construction
    21
  - Magnet Inductance
    22
  - Typical Superconducting Magnet
    22
    
    Maximum Ramp Rate
    23
    
    Maximum Magnet Current
    23
    
    Magnet Quench Protection Diodes
    23
    
    Persistent Switches
    23
    
    Magnet Current Leads
    24
    
    Helium Dewars
    24
    
    2.6 Magnet Quench
    25
  - Cutaway of a Typical Helium Dewar, Magnet, and Insert
    26
- Installation
  
  27
  - General
    27
  - Inspection and Unpacking
    27
  - Rear Panel Definition
    28
  - Model 625 Rear Panel
    28
    
    Line Input Assembly
    29
    
    Line Voltage
    29
    
    Line Fuse and Fuse Holder
    29
    
    Power Cord
    29
    
    Power Switch
    30
    
    Magnet Cable Connections
    30
    
    Analog Input/Output Connections
    30
    
    External Current Programming
    30
  - Model 625 Analog Input/Output Connector
    30
    
    Remote Voltage Sense
    31
    
    Output Current and Voltage Monitors
    31
    
    Digital Input/Output Connections
    31
    
    Fault Output
    31
    
    Remote Inhibit
    31
    
    Trigger in
    31
  - Model 625 Digital Input/Output Connector
    31
    
    Persistent Switch Heater Output
    32
    
    Heater Output Connection
    32
    
    Heater Output Cabling
    32
  - Remote Inhibit and Trigger in Operation
    32
  - Persistent Switch Heater Output Connector
    32
    
    Instrument Grounding and Isolation
    33
    
    Connecting Multiple Units in Parallel
    33
  - Connecting Two Power Supplies in Parallel
    34
    
    3.10 Rack Mounting
    35
  - Rack Mounting a Model 625 Power Supply
    35
- Operation
  
  37
  - General
    37
  - Turning Power on
    37
  - Display Definition
    37
  - Output Current Display
    37
  - Model 625 Output Current Display
    37
    
    Magnet Field Display
    38
    
    Persistent Switch Heater Display
    38
    
    LED Annunciators
    38
    
    Keypad Definition
    38
    
    Key Descriptions
    38
  - Model 625 Magnet Field Display
    38
    
    General Keypad Operation
    39
    
    Display Setup
    40
    
    Display Mode
    40
    
    Display Remote Voltage Sense
    40
    
    Display Brightness
    41
    
    Setting Output Current
    41
    
    Current Ramp Rate
    42
    
    Compliance Voltage Limit
    43
    
    Zero Output Current
    43
    
    Stop Output Current
    43
    
    4.10 Pause Output Current
    43
    
    4.11 Maximum Setting Limits
    43
    
    Maximum Output Current
    43
    
    Maximum Compliance Voltage Limit
    44
    
    Maximum Current Ramp Rate
    44
    
    4.12 Ramp Segments
    45
    
    Field Constant
    46
    
    Field Constant Units
    46
    
    Field Constant Value
    46
    
    Persistent Switch Heater Output
    47
    
    Persistent Switch Heater Output Enable
    47
    
    Persistent Switch Heater Current Setting
    47
    
    Persistent Switch Heater Delay
    48
    
    Persistent Mode Ramp Rate
    48
    
    4.15 Psh On/Off
    49
    
    Quench Detection
    50
    
    Quench Detection Enable
    50
    
    Current Step Limit
    50
    
    4.17 Error Status Display
    51
    
    4.18 External Current Programming
    51
    
    4.19 Locking the Keypad
    52
    
    4.20 Interface
    53
    
    Changing Serial Baud Rate
    53
    
    Changing IEEE-488 Interface Parameters
    53
    
    4.21 Default Parameter Values
    54
- Computer Interface Operation
  
  55
  - General
    55
  - Ieee-488 Interface
    55
  - Changing IEEE-488 Interface Parameters
    56
  - Remote/Local Operation
    56
  - IEEE-488 Command Structure
    56
  - Bus Control Commands
    57
  - Common Commands
    57
  - Device Specific Commands
    57
  - Message Strings
    57
  - Status System
    58
  - Overview
    58
  - Model 625 Status System
    59
    
    Status Register Sets
    62
  - Standard Event Status Register
    62
    
    Error Status Register Sets
    63
  - Operation Event Register
    63
  - Hardware Error Status Register
    63
  - Operational Error Status Register
    64
  - PSH Error Status Register
    65
    
    Status Byte and Service Request (SRQ)
    66
  - Status Byte Register and Service Request Enable Register
    67
    
    IEEE Interface Example Programs
    69
    
    IEEE-488 Interface Board Installation for Visual Basic Program
    69
  - GPIB0 Setting Configuration
    70
  - DEV 12 Device Template Configuration
    70
    
    Visual Basic IEEE-488 Interface Program Setup
    71
    
    IEEE-488 Interface Board Installation for Quick Basic Program
    74
    
    Quick Basic Program
    74
  - Typical National Instruments GPIB Configuration from IBCONF.EXE
    75
    
    Program Operation
    77
    
    Troubleshooting
    77
    
    Serial Interface Overview
    78
    
    Changing Baud Rate
    78
    
    Physical Connection
    78
    
    Hardware Support
    79
    
    Character Format
    79
    
    Message Strings
    79
    
    Message Flow Control
    80
    
    Serial Interface Example Programs
    80
    
    Visual Basic Serial Interface Program Setup
    81
    
    Quick Basic Serial Interface Program Setup
    84
    
    Program Operation
    85
    
    Troubleshooting
    85
    
    Command Summary
    86
Table of Contents

87
- Command Function *CLS Clear Interface CMD
  
  88
- Page Command Function OPST Operational Status Query
  
  93
- Options and Accessories
  
  99
  - General
    99
  - Models
    99
  - Accessories
    99
- Service
  
  103
  - Contacting Lake Shore Cryotronics
    103
  - Returning Products to Lake Shore
    103
  - Fuse Drawer
    104
  - Line Voltage Selection
    104
  - Fuse Replacement
    105
  - Error Messages
    105
  - Power Fuse Access
    105
    
    Output Source Impedance
    107
    
    Electrostatic Discharge
    107
    
    Identification of Electrostatic Discharge Sensitive Components
    107
    
    Handling Electrostatic Discharge Sensitive Components
    108
    
    Enclosure Bottom Removal and Replacement
    108
    
    7.10 Firmware Replacement
    109
    
    7.11 Psh Output Compliance Voltage Configuration
    109
  - Location of Important Internal Components
    110
    
    7.12 Connector and Cable Definitions
    111
  - ANALOG I/O Connector Details
    111
  - PSH OUTPUT Connector Details
    111
  - DIGITAL I/O Connector Details
    112
  - RS232 (DTE) Connector Details
    112
    
    Serial Interface Cable Wiring
    113
    
    IEEE-488 Interface Connector
    114
  - IEEE-488 Rear Panel Connector Details
    114
    
    7.13 Calibration
    115
- Appendix A - Glossary of Terminology
  
  123
- Appendix B - Units for Magnetic Properties
  
  131
- Appendix C - Handling Liquid Helium and Nitrogen
  
  131
  - C1.0 General
    131
  - C2.0 Properties
    131
  - C3.0 Handling Cryogenic Storage Dewars
    131
  - Typical Cryogenic Storage Dewar
    131
    
    C4.0 Liquid Helium and Nitrogen Safety Precautions
    132
    
    C5.0 Recommended First Aid
    132

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