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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual

Operation

3-12

This Page Intentionally Left Blank.

Table of Contents

Table of Contents3
Foreword7
- Purpose and Scope7
- Hardware Covered7
- Warnings, Cautions, and Notes7
- General Installation Precautions7
- Electrostatic Discharge7
- Dangerous Voltages8
- Before You Operate the Equipment9
- Safety Summary9
- Safety Symbols10
Introduction11
- General11
- Features11
- Specifications12
- Operating Characteristics14
- True, Four-Quadrant Bidirectional Power Flow14
Four-Quadrant Power14
- Low Noise, High Stability Current Regulated Output15
Comparison of Old and New MPS Designs15
- Highly Efficient, Air-Cooled, Compact Unit16
Initial Setup and Connections17
- Inspecting and Unpacking17
- MPS Mounting17
- Environmental Requirements17
- Connecting the MPS to Power17
- Power and Ground Requirements18
- MPS Input Power Ratings18
- Input Power Connections18
- Power up19
- Magnet Cable Connections19
- Shielding, Grounding, and Noise20
- MPS Remote Inhibit and Fault Indicator Connections20
- AC on Indicator20
- OVP Connection20
RI, FLT, ON, and OVP Connections20
- MPS Analog Current and Voltage Monitoring Connections21
- External Current Programming21
- Remote Sense Connections21
- Analog Monitoring, Programming, & Remote Sense Connections21
- Multiple Auto-Parallel Setup22
Remote Sensing Connections22
- Multiple MPS Remote Inhibit Mode24
Typical Multiple MPS Connections for Two MPS Units24
- Post-Installation Instructions25
- System Shutdown and Repackaging for Storage or Shipment25
- Returning Equipment to Lake Shore25
MPS Front Panel27
- Power up28
- Normal Display for Manual Mode28
- Normal Display for Manual PSH Control29
- Normal Display for Automatic PSH Control29
- Function Menus31
- Function Menu 131
- Automatic Mode / Manual Mode31
- Interface Setup Screen31
- 3.6.1.3 Step Limit/Zero Screen32
- 3.6.1.4 Instrument Setup Screen32
- Function Menu 233
- 3.6.2.1 Outputs Only Screen34
- 3.6.2.2 Lhe Level34
- 3.6.2.3 Field34
- 3.6.2.4 PSH Setup34
- Function Menu 334
- 3.6.3.1 Delays Setup Screen34
- Delays Setup Screen with Dithering35
- Manual Persistence Control Example35
- Automatic Persistence Control Example35
Operation27
- General27
- The MPS Front Panel27
Typical Automatic Mode Cycle36
- Dithering in Automatic Mode37
Remote Operation39
- 4.0. General39
- 4.1. Ieee-488 Interface39
- IEEE-488 Interface Settings39
- IEEE-488 Command Structure40
- 4.1.2.1 Bus Control Commands40
- 4.1.2.2 Common Commands40
- Interface and Device Specific Commands40
- Status Registers40
- 4.1.3.1 Status Byte and Service Request Enable Registers41
- Example IEEE Setup and Program42
- 4.1.4.1 GPIB Board Installation42
- 4.1.4.2 Run the Example Quickbasic Program42
- Notes on Using the IEEE Interface43
Typical National Instruments GPIB Configuration from IBCONF.EXE44
- Serial I/O Interface45
Serial Interface Adapters45
- Serial Interface Hardware Configuration46
- Serial Interface Settings46
- Sample BASIC Serial Interface Program46
- Notes on Using the Serial Interface47
- Summary of IEEE-488/Serial Interface Commands48
- Operational Commands Description49
- Interface Commands Description51
- Ramping Commands Description52
- Current Zero Commands Description53
- Current Step Limit Commands Description54
- Computed Field Commands Description55
- Common Commands Description56
Error Messages and Troubleshooting59
- General59
- Software Error Messages59
- Factory Default Settings62
- Calibration63
- Performance Test64
- B Rear Panel CAL and ID Switch Definitions66
- IEEE-488 Interface Connector66
- Rear Panel Connector Details66
- Serial Interface Cable and Adapters68
Rear Panel Connectors66
Serial Interface Connector66
Model 2001 RJ-11 Cable Assembly Wiring68
Options and Accessories69
- General69
- Model 6224 IEEE-488/Serial Interface69
- Model 6226/6476 Liquid Helium Level and Gaussmeter Input Card69
- Hall Sensor Mounting Considerations - Models HGCT-3020 and HGCA-302070
- The Model MSA-410 and MST-410 Hall Sensors71
- Connections71
- Installation71
- Lhe Level72
- Lhe Level Operation72
- Field Probe Setting and Calibration73
- Level Sensor Calibration73
- Model 6226/6476 IEEE-488 Remote Operation Commands74
Nbti Filament Resistance Chart74
Nbti Filament Resistance Values74
- Model 6228 and 6228-8MUX Persistent Switch Heater Output77
- Installation77
- Model 6228 Operation77
- Model 6228-8MUX Operation78
- PSH Card Voltage Constraints78
- Model 6228 Remote Operation Commands79
- Model 6228-2 Persistent Switch Heater Output80
- Model 6228-2 Remote Operation Commands81
- Accessories82
  - Appendix A - Units for Magnetic Properties85
  - Appendix B - Mainframe Remote Operation85
- B1.0 General85
- B2.0 Control Bus Serial Interface Specifications85
- B3.0 Control Bus Serial Interface Connector85
- B4.0 Control Bus Serial Interface Configuration86
- B5.0 Selecting the Control Bus Serial Interface Address86
- B6.0 Control Bus Serial Interface Operation87
- B7.0 Control Bus Serial Interface Sample Program88
  - B-1 MPS Mainframe Control Bus Remote Command Summary89
  - B-2 Additional MPS Mainframe Control Bus Remote Commands90

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