38 GSM19 Series Magnetometers - Version 7
GEM Systems, Inc. Advanced Magnetometers
For more technical information, visit www.gemsys.ca
C change enables you to change the 6 letter file name - but only before the first reading of the
file.
• Use the red letters on the keyboard to name the file. If the required letter is second or third,
press the corresponding button twice or three times. Use the:
F button after each letter to move the cursor to the next position and
B button as a backspace.
You can store up to 50 files in the mag. File names have a format similar to 01survey.m, where you
can only change the 6 letters between the first number and the period (i.e. the file extension is
fixed). The prefix numbering (ex. 01 to 50) and the file extension are automatically assigned. The
file extensions are
.m for mobile and .b for base (see section 6.1 for more file extensions).
5.3.7 Setting the Cycle Time
In the Survey Menu, press F to highlight cycle time.
SCREEN 20 survey mode position time file
cycle
time
tuning AC filter
display mode text ID
0004.0 sec cycle time
A-start C - D +
←
BF
→
C - and
D + enable you to decrement or increment the Cycle time
There are four groups of survey modes with different limits in cycle time:
Cycle Time Survey Mode
1. 3.0 sec. - 10.0 sec.
2.
3.0 sec. - 3600.0 sec.
3.
0.5 sec. - 2.0 sec.
4.
0.2 sec. - 2.0 sec.
Mobile gradiometer, mobile + vlf, gradiometer vlf.
Base Station.
Walk modes.
Fast & marine modes.
The cycling time for each of these groups is saved and after changing the survey mode the last used
cycle time is restored in each of the survey modes.
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