G-858BP Backpack Mag Operators Manual
Pop up Menus
While in Search Mode (and the other modes as well), there are two quick pop up menus that are
accessible:
Audio Key
Pressing the AUDIO key will bring up an audio adjust indicator. Then the up- and down-arrow keys
will adjust the volume, while the right- and left-arrows will adjust the pitch of the woowee. The audio
adjust indicator will disappear after a few seconds.
Scale Key
Pressing the SCALE key will bring up an scale adjust indicator. Then the up- and down-arrow keys
will adjust the speed of the sweep (readings shown per page), while the right- and left-arrows will adjust
the full scale (in nT). The scale adjust indicator will disappear after a few seconds.
Chapter 5: Simple Survey Mode
Simple Survey
Once the unit is reading properly in Search Mode, you are ready to begin your survey. If you are
unfamiliar with magnetic surveys, please read Appendix 1 and the Applications Manual for Portable
Magnetometers, shipped with your G-858BP.
In simple survey mode, the unit keeps track of MARK and END LINE key presses in order to
locate the position of the sensor readings. Later, after downloading the data into the PC, you will use the
MagMap2000 program to attach an x and y coordinate to each reading.
Survey Overview
Typically, a survey is performed by walking up and down the survey area, surveying a series of
lines, as shown below.
Simple Survey Overview
Line Key Press
Mark Key Press
Line No.
0
1
2
34
5
67
Mark No.
0
1
2
3
4
0
1
2
3
4
0
1
2
3
4
0
1
2
3
4
0
1
2
3
4
0
1
2
3
4
0
1
2
3
4
0
1
2
3
4
It is most convenient to survey lines walking in both directions, as shown, rather than walking
back to the bottom of the map, always surveying up (either method maybe used, however). You will start
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