Ака Signum 7272M MFT version 1.00 Руководство пользователя онлайн [27/34] 810095

When the search coil interacts with a metal object

there may be a single tone burst or possibly several tone

bursts in rapid succession. Therefore one should pay

attention to the following.

When the detector responds

with a single short high tone and the signal level is rather

stable it is a good probability that the targets is not very

large and of a non ferrous nature at a depth of more than

5cm.

On the other hand if the detector gives a series of

(like a nail) located along the scanning direction. If the

object is located along the perpendicular plane of the scan

or the coil, the device will issue a single low-frequency

short tone.

Fig. 16

complex pattern when interacting with metal objects close to the coil

or the near zone (signal levels greater than 80). Therefore when

trying to determine the target ID adjust the coil height to a level that

device uses a special high pitched tone which is different from the usual tone indicated on

such non ferrous targets. If you desire the signal from "hot rocks" can be deleted by setting

the discriminator sector value with the right edge of the +86. However, the most effective

means of suppressing the audible reaction on hot rocks is to use the DHR algorithm (Disc.

of hot rocks). The risk from using discrimination settings to eliminate an audio response to

hot rocks is this. Due to effect of the ground valuable targets, whose vector angle is close to

that of hot rocks, can being missed. This risk is virtually eliminated by using the algorithm

DHR instead.

As you know, a particular problem for induction metal detectors is the identification of flat