Ака Signum 7272M MFT version 1.00 [28/34] Normal operating mode

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

ООО «фирма «АКА», +7(495)621-0481, http://aka.2000.ru aka_md@mail.ru

ferromagnetic objects such as steel caps/stoppers, lids, cans, etc., objects with a

relatively large diameter of the eddy currents. This is largely helped out by using our

proprietary development – The Hodograph Display (see Fig. 19).

In the interaction of such objects with the coil (assuming that the level of

the signal is above 20) then time curves of these objects, as a rule, are twisted or looped in

nature and "scattered" around the screen depending on the direction of the scan. Fig. 17

shows the travel times of these types of signals from an iron bottle cap/stopper.

Normal operating mode

Fig.17

To solve the problem with identifying steel caps/stoppers, you can use the S-

algorithm, which greatly simplifies the process of identification of small (up to 40-50 mm)

flat iron objects.

If you have received a questionable audio response of an object, check using the S-

algorithm to see if it is a cap. Do not forget to monitor the signal level. This algorithm works

effectively only when the signal level is 10 or higher.

Analyzing these types of questionable targets is made much easier and does not

require as much user experience. The main job of identifying is performed by the

processor. Examples of the hodographs for the same cap/stopper using the S-mode

algorithm is shown in Fig. 18.

S-Mode Algorithm

Fig. 18