ABEM Terrameter SAS 1000 / SAS 4000
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particular hardware configuration of these cables, and protocol files should use array code 12
(tomography). See section 8.1.5 “Format of Lund Imaging Address, Protocol and Location
Files” (page 60) for more information on address and protocol files. The roll-along feature
will not work for this type of measurements.
6.2.12
Possible Sources of Error
A number of possible problems, common sources of error/reasons and suggested measures are
listed below. Suggestions for additions to this list are appreciated.
N.B. Moisture and/or dirt in the connectors will conflict the field work and even cause
permanent damage to the connectors. Always keep the protection caps clean and in place
when ever possible.
N. B. To ensure proper function, SAS 1000 / 4000 should be powered from a gelled lead-acid
battery or a car battery (25 – 70
10
Amp. hours) during the field work.
Problem
Reason
Remedy
No signs of life from
the
Electrode
Selector (no beep
when the Terrameter
power is switched
on).
The
battery
may
be
completely discharged in
either the Electrode Selector
or the Terrameter, or the
communication
cable
between the units may be
faulty.
Check that the batteries of Electrode
Selector and Terrameter are properly
charged, and that the cable linking the
units is OK
No contact obtained
at all during the
contact test
Poor electrode grounding
for all electrodes, or no
proper response from the
Terrameter
Check that the Electrode Selector is
trigging and Terrameter is responding
properly. If not check that all interface
cables are in good condition and properly
connected, and that the batteries are OK.
If the Terrameter is responding check the
error code, where a common reason is
that the contact resistance is too high for
all the electrodes. Try to improve the
grounding, or step down the current (in
general not recommended, will impair
data quality)
10
A battery capacity of 60-70 Ah is recommended for heavy duty applications, i.e. continuous work for several hours with a
high current setting.
