2
INTRODUCTION
This manual supplies users of the EM38-MK2 with operating information and some theoretical
results to assist in the planning and interpretation of geophysical surveys. Additional
information can be found in Geonics Technical Note TN-5, which outlines the factors affecting
soil and rock conductivity, and Technical Note TN-6, which describes the general theory of
terrain conductivity mapping using inductive electromagnetic techniques.
The EM38-MK2 provides simultaneous measurements of ground conductivity (Quad-Phase) and
magnetic susceptibility (In-Phase) with two transmitter receiver coil separation at 1 m and 0.5 m,
for 3 effective depth ranges; 1.5 m and 0.75 m in vertical dipole mode and two ranges , 0.75 m
and 0.38 m, in horizontal dipole mode.
The instrument simultaneously measures 4 components; Quad-Phase and In-Phase for both 1 m
and 0.5 m coil separations and provides 4 component output to a digital recorder (optional)
connected to RS-232 port.
The EM38-MK2-1 provides simultaneous measurements of ground conductivity (Quad-Phase)
and magnetic susceptibility (In-Phase) with one transmitter receiver coil separation at 1 m for 2
effective depth ranges; 1.5 m in vertical dipole mode and 0.75 m in horizontal dipole mode.
The instrument simultaneously measures 2 components; Quad-Phase and In-Phase and provides
2 component output to a digital recorder (optional) connected to RS-232 port.
For monitoring purposes, or measurement without a digital recorder, two meters on the front
panel, duplicated by two meters on the side of the instrument, can be used to monitor results of
two measured components depending on the setting of the mode switch in the following way:
a)
1 m
Quad-Phase (Q/P) for 1 m separation
In-Phase (I/P) for 1 m separation
┐
├for EM38-MK2-1
┘
┐
│
│
│
│
├ for EM38-MK2
│
│
│
│
│
┘
b)
Q/P
Quad-Phase (Q/P) for 0.5 m separation
Quad-Phase (Q/P) for 1 m separation
c)
I/P
In-Phase (I/P) for 0.5 m separation
In-Phase (I/P) for 1 m separation
d)
0.5 m
Quad-Phase (Q/P) for 0.5 m separation
In-Phase (I/P) for 0.5 m separation
See Figure A
Summary of Contents for EM38-MK2
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