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7.4
TUNING THE DETECTOR
TUNE fine-tunes the balance between the detector's receiver
and transmitter circuitry to provide consistent pointer and tone
indications. Follow these steps to set TUNE:
1. Rotate VOLUME to the 11 o' c lock position.
2. Set DISCRIMINATION to its midpoint.
3. Hold the search coil about 1 foot away from the ground and any
metal object, hold down the red button on the handle, and slowly
rotate TUNE left and right until the pointer on the viewmeter rests
at or near 0, tben release the red button.
I nfo
Press the red button on the handle at any time during
operation to automatically return the pointer to 0.
7.5
INDOOR TESTING
1. Remove any watches, rings, or other metal jewellery you are
wearing, then place the detector on a wooden or plastic table.
2. Adjust the search coil' s angle so the flat part faces the ceiling.
N OTICE
Never test the detector on a floor inside a building.
Most buildings have metal of some kind in the floor,
which might interfere with the objects you are testing
or mask the signal completely.
3. Rotate VOLUME to the 11 o' c lock position.
4. Set DISCRIMINATION to its rnidpoint.
5. Move a sample of the material you want the detector to find (such as a gold ring or a coin) about
2 inches above the search coil.
I nfo
The search coil will not detect without motion. You
must move the object since you are not sweeping
with the detector at this time. If you are using a coin,
the detector detects it more easily if you hold it so a
flat side is parallel with the flat side of the search coil
(not the edge).
6. If the detector detects the material, it sounds a tone and
the pointer moves to the left (ferrous) or to the right (non-
ferrous) while the detector determines the type of metal
it is detecting.
16
INSTRUCTION MANUAL HD 3500
82210 -01.2023 - V5
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