ABEM Terrameter LS
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12 Appendix C. Spread and Measuring Sequence
Files
12.1
General
The measurement process is controlled via spread description files and protocol
(measuring sequence) files. A protocol file must always refer to a spread description
file, and a protocol file may in some cases be used in combination with different
spread description files. These files are in XML format and consequently have XML
filename extension. A list of supplied measuring sequence / protocol files can be
found in “Section 12.14 - Standard Measuring Sequence Files”.
The same protocol files can be used for instruments with different number of channels,
so that the same protocol can be used for an instrument with 4, 8 or 12 channels. It
may, however, be possible that protocol files using different strategies for optimising
the use of the channels are most suited for the different versions of the instrument.
For older versions of the ABEM Lund Imaging System the spread description files are
called address files (ADR filename extension). Separate files were used for the first
measurement station (.ORG) and following stations in the roll-along procedure (.UP
and .DWN), but that is not needed for Terrameter LS. Utility software that converts
from the old to the new system is available in the Terrameter LS utility software
(“Protocols / Convert ADR to XML Spread File” and “Protocols / Convert ORG to
XML Protocol File” respectively).
There are lots of programs available for editing XML files. A basic text editor such as
Notepad will do just fine, but using a dedicated XML editor is recommended. There
are a number of XML editors available on the market and one free alternative is XML
Marker. It can be downloaded from
www.symbolclick.com
12.2
Spread Description Files in XML-format
The spread description files define the hardware configuration of the measurement;
including parameters such as number of electrode cables, number of electrode
take-outs per cable and roll-along direction and step size. It also contains the
necessary details on the wiring between electrode take-outs and the physical relay
switch channels. A spread description file can be as simple as specifying how the C1,
C2, P1 and P2 terminals are connected to the internal receiver and transmitter, or it
can be more complex and include for instance number of electrode cables, number
electrode take-outs per section, internal and external addresses of electrode channels,
etc.
The files are self-explanatory since XML-format is used, but here are some brief
explanations:
•
<Cable> defines one electrode cable, and all electrodes belonging to the same
cable must be defined within the same <Cable> section.
•
<Id> is the electrode number that the protocol files refer to.
•
<X> refers to the position of the electrode along the spread in terms of number of
electrode spacing steps
•
<Name> is the text used to describe the electrode in for example the electrode
contact test.
Summary of Contents for Terrameter LS
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