Lake Shore Model 421 - Page 6

Lake Shore Model 421 Gaussmeter User’s Manual
ii
TABLE OF CONTENTS (Continued)
Chapter/Paragraph Title Page
4 REMOTE OPERATION ..........................................................................................................................4-1
4.0 GENERAL............................................................................................................................4-1
4.1 SERIAL INTERFACE OVERVIEW......................................................................................4-1
4.1.1 Physical Connection.........................................................................................................4-1
4.1.2 Hardware Support ............................................................................................................4-2
4.1.3 Character Format .............................................................................................................4-2
4.1.4 Message Strings...............................................................................................................4-2
4.1.5 Message Flow Control......................................................................................................4-3
4.1.6 Changing Baud Rate........................................................................................................4-3
4.1.7 Serial Interface Basic Programs.......................................................................................4-4
4.1.8 Troubleshooting................................................................................................................4-9
4.2 SERIAL INTERFACE COMMAND SUMMARY...................................................................4-9
4.2.1 Interface Commands ......................................................................................................4-11
4.2.2 Device Specific Commands ...........................................................................................4-12
5 ACCESSORIES AND PROBES.............................................................................................................5-1
5.0 GENERAL............................................................................................................................5-1
5.1 ACCESSORIES...................................................................................................................5-1
5.2 LAKE SHORE STANDARD PROBES.................................................................................5-3
5.2.1 Probe Selection Criteria ...................................................................................................5-3
5.2.2 Radiation Effect on Gaussmeter Probes..........................................................................5-3
5.2.3 Probe Specifications.........................................................................................................5-4
5.3 HELMHOLTZ COIL LOW FIELD STANDARDS..................................................................5-8
5.4 REFERENCE MAGNETS..................................................................................................5-10
6 SERVICE.................................................................................................................................................6-1
6.0 GENERAL............................................................................................................................6-1
6.1 GENERAL MAINTENANCE PRECAUTIONS .....................................................................6-1
6.2 ELECTROSTATIC DISCHARGE ........................................................................................6-1
6.2.1 Identification of Electrostatic Discharge Sensitive Components......................................6-2
6.2.2 Handling Electrostatic Discharge Sensitive Components ................................................6-2
6.3 LINE VOLTAGE SELECTION .............................................................................................6-2
6.4 FUSE REPLACEMENT .......................................................................................................6-3
6.5 REAR PANEL CONNECTOR DEFINITIONS......................................................................6-4
6.5.1 Serial Interface Cable Wiring ...........................................................................................6-6
6.6 TOP OF ENCLOSURE REMOVAL AND REPLACEMENT ................................................6-7
6.6.1 Removal Procedure..........................................................................................................6-7
6.6.2 Installation Procedure.......................................................................................................6-7
6.7 EPROM REPLACEMENT ...................................................................................................6-7
6.8 ERROR MESSAGES ..........................................................................................................6-8
APPENDIX A – GLOSSARY OF TERMINOLOGY .....................................................................................A-1
APPENDIX B – UNITS FOR MAGNETIC PROPERTIES............................................................................ B-1
APPENDIX C – HALL GENERATORS........................................................................................................ C-1
C1.0 GENERAL........................................................................................................................... C-1
C2.0 THEORY OF OPERATION ................................................................................................ C-1
C2.1 Active Area ...................................................................................................................... C-1
C2.2 Orientation....................................................................................................................... C-2
C2.3 Handling .......................................................................................................................... C-3
C2.4 Polarity............................................................................................................................. C-3
C2.5 Lead Configurations ........................................................................................................C-3
C3.0 HALL GENERATOR GENERIC HOOKUP......................................................................... C-3
C4.0 USING A HALL GENERATOR WITH THE MODEL 421 ................................................... C-4
C5.0 SPECIFICATIONS.............................................................................................................. C-5
C6.0 HALLCAL.EXE PROGRAM................................................................................................ C-8