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Secrets and tricks when working in discrimination mode
In addition to valuable finds, which periodically find treasure hunters, the ground contains a huge number of different items from completely different metals, which are the objects of the metal detector response. In “all metals” mode, the detector is sensitive to any metal objects, but if you start the mode of “discrimination”, the detection algorithm will change, and the device will begin to distinguish between aluminum, copper, iron, silver or gold Goal. Almost all modern metal detectors have this ability, thanks to which the user can distinguish valuable items from unnecessary garbage.
Correct setting up discrimination is the most important operation and can play a key role in finding and deciding to dig up a find. There are devices that work only on signals, and discrimination can be determined only by ear, but the most common type of display discrimination of modern detectors - visual, when the user sees on the display a scale broken into Segments. When objects are detected, the screen shows the type of find in the form of icons, such as a coin, relic or jewelry or metal type, such as gold, copper or tin.

Discrimination against metals when searching for metal detectors: setting up and tips

In some models, you can immediately establish the desired mode of discrimination, in which the metal detector will detect only specified objects. For experienced treasure hunters, there is a selective discrimination option in which the user can choose the cut-off objects, and such an algorithm can be consistent or selective. In order to take advantage of this feature, you need to create a “mask of discrimination” that will specify which metals to recognize and which to skip depending on the purpose of the search. For example, take only signals from copper and gold objects, and targets from nickel and silver exclude.

Some metal detector models have an advanced two-dimensional discrimination system based on the use of two properties of metals: iron content and electrical conductivity. This approach in identifying objects greatly increases the chances of discovering truly valuable objects. Similar smart find 2 technology is used by Minelab E-Trac and Minelab Explorer detectors. In addition, Minelab metal detectors are equipped with high-speed, which instantly process the received signal from the target, displaying the result in an understandable graphic and numerical form, allowing the opportunity to understand the most accurately for the purposes and eliminate unnecessary garbage.
However, you need to use the discriminator carefully and with an understanding of the process, as too limiting the range of targets, you can skip and worthwhile objects. When working in discrimination mode, you should consider a parameter such as “phase delay,” which means that the coil signal is somewhat delayed depending on the conductivity of the target. This delay depends on the depth of the object, the properties of the soil, the shape and location of the object detected. For example, a highly mineralized soil or a coin standing on the edge can signal as iron, and in the second case you can miss an interesting find. Therefore, it is not necessary to overstate the settings of discrimination, and try to maintain a reasonable balance when excluding objects.

Some search engines complain that in discrimination mode, the metal detector still reacts to iron targets, especially unusual or ring-shaped shapes. Such objects emit intermittent signal and distinguish iron detector is quite difficult, but if you install the coil directly above the object, it will be easier to determine the iron object. In addition, iron targets for a long time in the ground strongly oxidize and create the so-called “halo effect” which in its intensity can overcome the established level of discrimination. You can only determine the type of such find when digging, but do not be afraid of it, as in some cases may meet interesting historical artifacts.
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