Operating instructions
4point light 10W (V 4.58)
Page 29 of 130
G
M
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8.2 VES mode
The mode
“Vertical Electrical Sounding“ (VES) comprises the classical 4-electrode
resistivity soundings like Schlumberger, Wenner, Dipole-
Dipole…
The output current for the VES measurements can be set only during the
measurement (
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VES MAP RMT TOM MON
CONTACT SP DELETE
SETTINGS MISC INFO
Battery: 5.52V
Fig. 8.2: Main menu
1.
Select „VES“ from the main menu with [
] and [
]
2. Confirm selection with [RET]
SCHLUMB HALF-SCHLUMB
WENNER DIPOL-DIPOL
POLE-POLE Output
Fig. 8.3: VES menu (Vertical Electrical Sounding)
3. Select the geometry from the VES menu with [
] and [
]
4. Confirm selection with [RET]
The following instructions apply both to Schlumberger and Half-Schlumberger
measurements. They also can be applied to all selectable geometries. Differences of
parameter settings in Wenner mode, Dipole- Dipole mode and Pole-Pole mode are
pointed out in a separate chapter.
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8.2.2 Measurement parameters for additional geometries, page 34
Regardless of the chosen geometry,
data acquisition
in all VES modes
is structured in files
and
records
. A record is an individual data point and it contains output current, input voltage and
geometry parameters. A file contains several records measured at one location.
In VES mode
the instrument will turn on the transmitter only for the current measurement. After
turning the transmitter on
it takes about 0.4 seconds for the receiver to settle
. To take care of
this and for best
performance the delay tim
e can be changed in the menu. “Settings“
“Acquisition“
. But unless you are not very familiar with the instrument, leave this parameter at
the value the instrument was delivered (0.5 sec).
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