17
‘Down sensor’ connector from the value of the magnetic field of the sensor connected to
the ‘Up sensor’ connector.
If the position on a grid should be used, the position of the first measurement
must be set, which means setting the items ‘Line’, ‘Pos’, and ‘Step’ in the POSITION item
of the main menu. This is described in detail in chapter 5.7. The measurement is started
by pressing [ENTER]. After about 2 seconds, the measured value of the magnetic field
with the statistical error is displayed, as well as the position of the measurement point
‘Line’ and ‘Pos’ and other information.
S 08:04:28
46347.2
±05.6nT
Line:+1026 Pos:-0980
Amp:8 D:0.6s
Save? ENTER/ESC
The value Amp means the signal intensity, and the value D expresses a time
constant of the decay of the precession signal. The question at the bottom indicates the
option to store the reading in the data memory.
By pressing [ENTER], the reading is stored in the data memory, and the next
position is displayed. By pressing [ESC], the measured data is erased, and the current
position is displayed.
6.5.
Measuring In Walk Mode
The WALK measure mode is selected in the MEASURE menu. In this mode, the
instrument is prepared to measure int the single and or gradient
of the Earth’s magnetic
field based on sensor configuration. The sensor configuration can be selected in the
setup menu item MODE see chapter 5.4.
In the WALK measure mode, the measurements are continually repeated and
saved to memory. The repetition interval is selectable int setup menu item WALK MODE.
The intervals are 0.5s, 1s, and 1.5s see chapter
6.6.
Measuring In Auto Mode
The AUTO measure mode is selected in the MEASURE menu. In this mode, the
instrument is prepared to serve as a base station and measure diurnal variations. When
the
measurement is started, two items are displayed: ‘Start time’ sets the time of the first
measurement of the base station.
‘Interval’ sets the time interval between measurements.
The results of the measurement in the AUTO mode are stored automatically in the
data memory.
The measurement in the AUTO mode is terminated by switching the instrument
off.
Summary of Contents for PMG-2
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