
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
S
TARTING THE
T
ESTING
P
ROCESS
(ROM
E
XAMPLE
) .............................................................................................. 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