Ака Signum 7272M MFT version 1.00 Руководство пользователя онлайн [31/34] 810095

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Селективный металлодетектор «Сигнум MFT» 7272М. Руководство по эксплуатации.

This useful component of the vector is the projection of AB to the vertical Y axis. The

smaller the angle difference between the ground signal vector and the vector of the coin

the less useful part of the projection of the signal and the less sensitivity. More important is

the fact that the angular difference becomes even less with the so-called "hot-stone" (see

fig. 26).

In these cases, even a minor incorrect setting of the ground balance can lead to a

significant loss of sensitivity to the large copper/silver coins or an undesirable (annoying)

response to "hot rocks" if the algorithm DHR is not used.

Note that when setting the ground balance, such as on loam, the angular difference

between the signal and the signal of large copper/silver coins is about 7-8 degrees. At the

same time, the angular difference between hot rocks is only 4-5 degrees which leads to

difficulties in the identification of such targets.

In view of the above, it is possible to give some practical recommendations.

1. As accurately as possible carry out Ground Balance.

2. In areas with little to no metal trash use the AGT.

3. In the presence of hot stones, when not using the DHR algorithm, carefully open

up the right border of the sector discrimination to minimize the risk of missing

these types of coins.

4. Try to adjust the vector phase of the soil by 2-3 degrees in the counterclockwise

direction (specific value selected experimentally in Depending on the type of

soil). To do this, perform the automatic ground balance procedure.

Then press the button to enter into manual ground balance mode

and adjust the balance value 2-3 times by pressing and then check the

response of the detector when scanning area clean. This procedure requires a

more careful scanning of the soil. In the case of false positives channel

identification (ST) reduce the angle of the phase by pressing

button until their disappearance.

When searching on the wet grass (dew, rain) there is an increased risk of false

signals in the ST channel. This effect manifests itself mainly due to the setting of high values

of sensitivity in the ST channel and to the presence of a weak electric conductivity in the

dew and plant liquids. To a large extent (almost completely), this effect can be eliminated

by placing the search coil in a protective plastic case (plastic bag, full-time protection, etc.).

In the case of searching in trashy areas it is sufficient to reduce the sensitivity of the ST

channel.