About the market of metal detectors, used
In the market of metal detectors constantly rotate among devices search engines. This is caused by the desire to acquire a more powerful detector. It quite justified.
The detector sufficiently reliable electronic mechanism. It is noticed that more often just fail only search elements (coils), which are constant mechanical stress on the soil, the coarse grass, rocks. With this effects rarely appear cracks on the coil, through which inside gets wet and over time, leads to the closure of turns of the search item. Such an element is not possible to use, it produces a result that does not match actually.
Such malfunction can be identified with the purchase. The main symptom of a faulty coil is that when moving the detector through the air, at 7 m above ground, the detector produces signals that allegedly, he "sees" the metal, mainly color.
When replacing the search item to a new this fault disappears.
Check metal detector/used when buying
When buying a metal detector used/necessary to check the functioning of the device, and the search item.
The electronic part of the detector is checked by switching between all possible modes. You need to have a metal detector horizontally at level 1 m above the surface. Take a few pieces of different composition (coin, the lighter, iron object, etc.) and to check the work of moving these items before the coil of the metal detector.
This way you can see how deep "sees" the metal detector, what the signals he gives to different metals.
After checking the detector in a static horizontal position, it you need to believe in the working position.
This method is described for testing in open space. In room, it is necessary that the distance from the walls to the detector was not less 2 M.
You need to check:
- take a metal detector in hand;
- lowered to the surface;
- to make a few moves during the search.
Author: S. L. Dubrovsky