5.4.5 Evaluating Signal Quality ..................................................................................................................... 54
5.5 WORKING WITH GRADIOMETER MODE (19G & 19GW)............................................................................. 55
5.5.1 Performing a Reading ........................................................................................................................... 55
5.5.2 Specifying Gradiometer Sensor Spacing............................................................................................... 56
5.5.3 Selecting the Display Mode................................................................................................................... 57
5.5.4 Selecting Magnetometer Channels........................................................................................................ 58
5.6 WORKING WITH WALKING MODES (19W, 19WG & 19GFW)..................................................................... 59
5.6.1 Performing a Reading ........................................................................................................................... 60
5.7 WORKING WITH BASE STATION MODE (ALL MODELS)........................................................................... 62
5.7.1 Performing a Reading ........................................................................................................................... 62
5.7.2 Stopping a Base Station Reading .......................................................................................................... 64
5.8 SYNCHRONIZING ROVER AND BASE STATION UNITS (ALL MODELS)................................................. 64
5.8.1 Setting the Time on the First Magnetometer ......................................................................................... 64
5.8.2 Transferring the Time............................................................................................................................ 65
5.9 APPLYING DIURNAL CORRECTIONS ............................................................................................................ 66
5.9.1 Mag-to-Mag Diurnal Correction .......................................................................................................... 67
5.9.2 File-to-File Diurnal Correction (GEMLinkW Utility)........................................................................... 69
6. DATA ORGANIZATION AND TRANSFER ......................................................................................................... 70
6.1 FILES AND DIRECTORIES................................................................................................................................. 70
6.2 DATA TRANSFER............................................................................................................................................... 71
6.2.1 Setting the RS-232 format...................................................................................................................... 71
6.2.2 Transferring the Data............................................................................................................................ 73
7. RECALLING DATA ................................................................................................................................................. 76
7.1 SELECTING A FILE TO REVIEW ...................................................................................................................... 76
7.2 DATA RECALL IN TEXT MODE ....................................................................................................................... 77
7.3 DATA RECALL IN GRAPH MODE.................................................................................................................... 79
8. ERASING MEMORY................................................................................................................................................ 83
8.1 STARTING THE ERASING PROCESS............................................................................................................... 83
9. TESTING YOUR SYSTEM...................................................................................................................................... 85
9.1 STARTING THE TESTING PROCESS (ROM EXAMPLE).............................................................................................. 85
10. UPGRADING INTERNAL SOFTWARE (FIRMWARE)................................................................................... 86
10.1 USING THE GEMLINKW UPGRADE UTILITY ............................................................................................. 86
10.2 ACCESSING THE UPGRADE MODE .............................................................................................................. 86
11. STORING YOUR MAGNETOMETER (IMPORTANT!) .................................................................................. 88
12. CHARGING THE BATTERY (IMPORTANT!).................................................................................................. 88
13. MAINTAINING YOUR SYSTEM (IMPORTANT!) ........................................................................................... 89
14. WARRANTY (IMPORTANT!).............................................................................................................................. 89
APPENDIX A: GLOBAL MAGNETIC MAPS .......................................................................................................... 90
A.1 UNDERSTANDING THE DIFFERENT SENSOR ORIENTATIONS ............................................................... 90
A.1.1 Overhauser Sensor................................................................................................................................ 90
A.1.2 Standard Proton Sensor........................................................................................................................ 90
APPENDIX B: RAW DATA FILES TRANSMITTED BY RS-232-C...................................................................... 93
B.1 MOBILE MODE................................................................................................................................................... 93
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