ABEM Terrameter LS
100
12.8
Optimising the Use of Channels for Pole-pole
While it is possible to make pole-pole measurements with the Terrameter LS without
any special accessories, using a special device can optimise the use of measuring
channels. The interconnections of all channels “P2” to the remote potential electrode
can be done via an adapter connected to the external connector AUX or the connector
Interconnect. The wiring of the adapter should connect the pins C, X, Z and b in the
KPT32 connector AUX
7
. This will interconnect every second row of the switch and
the remote potential electrode will be possible to route to all receiver channels. It is
the same wiring for 4, 8 or 12 channel systems. The signals are also available in the
Interconnect connector pin N, R, T and V in the KPT19 connector, so the wiring
could be done there as an alternative.
An additional option in the spread file sets the pole mode for the spread. It is only
needed if you connect an adapter that modifies the wiring of the instrument.
<PoleMode>
P2Half
</PoleMode>
This tells the software that a special hardware device is attached that will connect half
of the rows (4, 6, 8, 10) of the switch to the P2 remote electrode. It is only the external
part of the switch that will be affected.
Valid options are:
•
NoPol - No remote pole electrodes
•
P1, - P1 is in use. This is automatic if P1 is defined in spread
•
P2, - P2 is in use. This is automatic if P2 is defined in spread
•
P1P2, - P1 and P2 are in use. This is automatic if P1 and P2 is defined in spread
•
P1Half, Connect P1 to half of the rows in the switch 3, 5, 7, 9
•
P2Half, Connect P2 to half of the rows in the switch 4, 6, 8, 10
•
P1P2Half, Connect P1 to 3, 5, 7, 9 and Connect P2 to 4, 6, 8, 10
•
P1All, Connect P1 to row 3-10. (This will only shortcut the outside P1 and P2
connectors)
•
P2All, Connect P2 to row 3-10 (This will only shortcut the outside P1 and P2
connectors)
12.9
Protocol Files in XML-format for VES
Manual movement of electrodes can be used for measuring with geometries not
compatible with electrodes cables designed for standard 2D and 3D multi-electrode
surveying. Each movement of electrodes must then be done manually according to the
positions defined in the protocol file. One measurement point is defined by a set of
descriptions <Select> and <Move> tags:
<Select> MN/2= 0.2 AB/2= 1
<Move> 1 <X> 1 </X> </Move>
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The cable intended for pole-pole measurement with SAS4000 and ES464 (part no. 33 0020 14) will
do the job if connected to AUX (the other end of the cable should not be connected).
Summary of Contents for Terrameter LS
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