Duramaxx MD-350 Manual page 16

EN
16
Move the plate parallel to the surface of the earth, do not swivel it back and
forth. Slowly move the disc to avoid missing any objects. Check that you hear
a sound and that the needle deflects when you guide the seeker plate over the
metal object. Note that the metal detector only responds when the seeker
plate is moved.
Fine adjustment of the detector
Careful fine-tuning during the search allows you to distinguish between the
different metals even better. This sensitivity adjustment is made with the
DISCRIMINATION slider.
This control also adjusts the sensitivity for the size of the metal objects.
Turning the control to the left will make the device less sensitive and will only
detect large metal objects. The most sensitive setting is all the way to the right.
Here the detector even detects small pieces of silver paper. Adjust this control
according to the local conditions.
Determining the exact location of the find
It takes some practice to find the precise location of the metal object. For the
exercise you can bury (leave) coins and nails in your garden. Sometimes it is
also useful to change the search movement by 90°.
• If trash in an area is so heavy that you get false
signals, slow your sweep speed and use shorter
sweeps. Recently buried coins might not respond
the same as coins buried for a long period of time
because of oxidation .
• Some nails, nuts, bolts, and other iron objects
(such as old bottle caps) oxidize and create a „halo"
effect. A halo effect is caused by a mixture of
natural elements in the ground and the oxidation
created by different metals. Because of the metal
mixtures, target signals might not be in a „fixed"
position. This effect makes these objects very hard
to detect accurately.