abem Terrameter LS, Инструкция по эксплуатации

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ABEM Terrameter LS
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Figure 40. Transmitter settings view
The available settings on the Transmitter View (Figure 40):
Minimum
Current
Maximum
Current
Minimum and maximum current should be selected according
to site conditions (electrode grounding conditions, noise levels
etc), electrode spread size and type of electrode array, to
achieve good signal-to-noise ratio and productivity.
Max Power Maximum output power can be limited, for example to save battery
power. Default setting is the maximum 250W.
Allowed power
loss The allowed power loss can be specified, for example in order to
keep internal heat generation limited. Normally 50W works well.
Max output
voltage
Maximum output voltage from the transmitter can be limited, if for
example the electrode cables used are not designed for the
maximum voltage.
Electrode Test Electrode test is carried out using the “Focus One” method, in
which the resistance of each electrode is measured against all the
other electrodes. The alternative “No” is not recommended for
normal data acquisition as it may lead to acquisition of a lot of junk
data from electrode with inadequate ground contact.
Bad electrode
Fail electrode
Thresholds for acceptable electrode contact resistance
Electrode test
current
20mA is normally good