4
Step 1
With the instrument in the air and in the horizontal dipole mode of operation (Fig. 1), set the Q/P
and I/P readings to zero.
Step 2
Now adjust the Q/P zero control so that an arbitrary value (i.e H=10 mS/m) appears on the
display, for Q/P reading. Rotate the EM38-MK2 to the vertical dipole mode and note the reading
(hypothetically V=16 mS/m). Subtract the horizontal dipole reading from the vertical (V-H=6
mS/m).
Step 3
Finally, with the instrument still in the horizontal dipole mode, rotate the Q/P zero control until
the display reads the value calculated in step 2. In this example it would be 6 mS/m. Now when
you rotate the EM38 to the vertical dipole mode the reading should be 12 mS/m.
NOTE:
With the instrument at least 1.5 meters above ground or higher, the Q/P reading or conductivity
should always satisfy the following equation:
V=2H
where V = vertical dipole mode reading
and
H = horizontal dipole mode reading
Fig. 1
If 0.5 m coil separation is used, set the MODE switch to 0.5 m position and repeat Steps 1 to 3,
using .5 m controls. Note that the procedure that requires the lifting of the instrument to 1.5 m
height (for 1 m separation) can be replaced by 0.75 m height.
Summary of Contents for EM38-MK2
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