ABEM Terrameter SAS 1000 / SAS 4000
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where the electrode positions are given as integers in the interval 1-
n
tot
. If remote electrodes
are used these positions are specified as zero. Example protocol files can be found in
“Example Protocol Files” (page 92).
The array codes are used mainly for presentation purposes, and in the case of pole-pole and
pole-dipole how the contact test is performed. The following codes are defined:
Code
Array
0
Resistance
1
Wenner-
2
Wenner-
3
Wenner-
4
Pole-Pole
5
Dipole-dipole
6
Pole-dipole
7
Square-
8
Square-
9
Square-
10
Schlumberger
11
General surface array
12
Tomography
13
Equatorial dipole-dipole
15
Multiple gradient array
If an array not defined in the list is to be used, array code 0 may be used, which means that
resistance instead of apparent resistivity is displayed during measurement. If array code 12 is
used only the electrode numbers, and not the coordinates are saved, which is suitable for e.g.
measurements involving boreholes (see section on geometry files below).
Geometry Files
The electrode coordinates for a borehole measurement are entered via a geometry file (textfile
with XYZ file extension), with the following format:
n-cables
Header cable 1
1
x
1,1
y
1,1
z
1,1
2
x
1,2
y
1,2
z
1,2
…
n
1
x
1,n1
y
1,n1
z
1,n1
Header cable 2
1
x
2,1
y
2,1
z
2,1
2
x
2,2
y
2,2
z
2,2
…
n
2
x
2,n2
y
2,n2
z
2,n2
Header cable 3
1
x
3,1
y
3,1
z
3,1
2
x
3,2
y
3,2
z
3,2
…
n
3
x
3,n3
y
3,n3
z
3,n3
An example is given in “
Appendix E. Address and Protocol Files
”.
