Lake Shore Model 421 - Model MH-6 Helmholtz Coil

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Lake Shore Model 421 Gaussmeter User’s Manual

Accessories and Probes 5-9

P-421-5-09.bmp

Figure 5-9. Model MH-6 Helmholtz Coil

P-421-5-10.bmp

Figure 5-10. Model MH-12 Helmholtz Coil

Main Page

Table of Contents5
Introduction9
- General9
- Product Description9
Model 421 Gaussmeter Front Panel9
- Specifications11
- Safety Summary12
- Safety Symbols12
Installation13
- General13
- Inspection and Unpacking13
- Repackaging for Shipment13
- Rear Panel Definition14
  - Model 421 Rear Panel14
- Line Input Assembly15
- Line Voltage and Fuse Verification15
- Power Cord15
- Power Switch15
- Probe Input Connection15
- Attachment to a Hall Generator16
- Corrected and Monitor Analog Outputs16
- Relay Terminal Block16
- Initial Setup and System Checkout Procedure17
Operation19
- General19
- Definition of Front Panel Controls19
- Front Panel Keypad19
  - Model 421 Front Panel19
- Front Panel Display20
- General Keypad Operation21
- Gauss/Tesla21
- Ac/DC22
- Display Filter22
Model 421 AC Frequency Response22
- Manual Range and Auto Range23
- Zero Probe24
- Max Hold and Max Reset24
- Relative25
- Alarm and Relay25
- 3.10 Analog Outputs28
- 3.11 Interface Parameters29
- Fast Data Mode29
- 3.13 Locking and Unlocking the Keypad30
- 3.14 Display Brightness30
- 3.15 Factory Default Settings30
- 3.16 Probe Considerations31
- 3.16.1 Changing Probes31
- 3.16.2 Probe Handling31
- 3.16.3 Probe Operation32
  - Maximum Flexible Probe Bend Radius32
- 3.16.4 Probe Accuracy Considerations33
Effect of Angle on Measurements33
Remote Operation35
- General35
- Serial Interface Overview35
- Physical Connection35
- Hardware Support36
- Character Format36
- Message Strings36
- Message Flow Control37
- Changing Baud Rate37
- Serial Interface Basic Programs38
Serial Interface Program Control Properties39
- Visual Basic Serial Interface Program40
- Quick Basic Serial Interface Program41
- Troubleshooting43
- Serial Interface Command Summary43
- Interface Commands44
- Device Specific Commands44
- Serial Interface Commands44
Accessories and Probes55
- General55
- Accessories55
- Lake Shore Standard Probes57
- Probe Selection Criteria57
- Radiation Effect on Gaussmeter Probes57
- Probe Specifications58
Definition of Lake Shore Transverse Probes59
Definition of Lake Shore Axial Probes60
Definition of Lake Shore Flexible Transverse Probes61
- Helmholtz Coil Low Field Standards62
  - Model MH-6 Helmholtz Coil63
- Reference Magnets64
Model 4065 Large Zero Gauss Chamber65
Model RM-1/2 Rack-Mount Kit66
Model RM-2 Dual Rack-Mount Shelf67
Service69
- General69
- General Maintenance Precautions69
- Electrostatic Discharge69
- Identification of Electrostatic Discharge Sensitive Components70
- Handling Electrostatic Discharge Sensitive Components70
- Line Voltage Selection70
- Fuse Replacement71
- Rear Panel Connector Definitions72
  - RELAY Terminal Block Details73
- Serial Interface Cable Wiring74
- Top of Enclosure Removal and Replacement75
- Removal Procedure75
- Installation Procedure75
- Eprom Replacement75
- Error Messages76
Appendix A - Glossary of Terminology77
Appendix B - Units for Magnetic Properties85
Appendix Chall Generators85
- C1.0 General85
- C2.0 Theory of Operation85
- C2.1 Active Area85
- C2.2 Orientation86
- C2.3 Handling87
- C2.4 Polarity87
- C2.5 Lead Configurations87
- C3.0 Hall Generator Generic Hookup87
- C4.0 Using a Hall Generator with the Model 42188
- C5.0 Specifications89
  - C-7 Transverse Hall Generator HGT-1010 Dimensions90
  - C-3 Transverse Hall Generator Specifications91
- C6.0 Hallcal.exe Program92

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