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Access to the Discrimination menu is provided by holding down the AM button on the control unit of the AKA Intronik metal detector. The primary adjustment made here is the setting of the upper discrimination limits based on the 2F ID number. Depending on the search tasks, the user can set the rejection boundaries for unwanted objects in the upper part of the 2F ID scale from a value of 0 and above. The 2F ID function has proven effective in excluding chunks of coke during search operations, which have a 2F ID value close to 00.

For example, if discrimination is set to 05 for all search objects, targets with a 2F ID value equal to or less than 05 will not be indicated by the metal detector with an audible color signal. However, as soon as the 2F ID value exceeds 05, the user will hear the corresponding color signal.

In the window with the lower discrimination limit for 2F ID, one can manually set the rejection sector for unwanted objects, starting from a value of 180 and below.

For example, if the lower discrimination limit is set to 140 for all targets, the device will not produce an identification signal for objects whose 2F ID is equal to or greater than 140.

AKA MD specialists recommend properly setting the discrimination of the lower and upper 2F ID values when working on conductive variable soil. In this case, on the one hand, it is possible to successfully eliminate phantom signals in undesirable 2F ID sectors. On the other hand, there is a certain probability of missing small, low-conductivity valuable items and objects located at significant depths.

Another useful discrimination setting in the AM menu is the No Fe sector (00…90). It allows for the audible indication of objects within the user-defined sector boundaries, regardless of their physical and chemical nature. The No Fe sector setting assists in the search for low-conductivity targets of small size in highly mineralized ground and among signal stones.

The TI1 Filter Boundary (00…-60) is the boundary of the questionable iron sector for single-frequency VDI objects. Setting the TI1 filter boundaries contributes to the most accurate separation of iron and non-iron targets. The Fe boundary of "-60" works in conjunction with the Level TI1 (Target Index 1). All values above the TI1 level are identified by the metal detector as non-iron, even though they are determined as iron by the hodograph and VDI.

The next setting is the TI1 filter sensitivity (01..02).

At a value of 01, the filter will accept and process confident signals with a rating of at least 01 at the low frequency.

At a value of 02, the filter will be able to accept and process even the weakest signals within the metal detector's user-set sensitivity. In this case, it is possible to find a greater number of small non-iron and deep targets that have been shifted by the device into the iron sector. However, with a filter sensitivity of 02, the number of false signals increases.

Discrimination settings for detection on factory programs are usually disabled. When enabled, the user will hear both signals - detection and identification, leading to increased auditory load.

Fe Cap Discrimination (off …01…05). The higher the setting level, the lower the probability that the metal detector will indicate iron beer caps with a color signal. This filter has proven to be very effective for searching in public recreation areas and on beaches.

The final setting in the AM menu is the acceleration of identification. When enabled, the Intronik spends less time on identifying non-iron targets. However, this also increases the number of cases of incorrect identification of worthless iron objects with a color signal.