Ака Signum 7272M MFT version 1.00 [26/34] Replacing the coil

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

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

REPLACING THE COIL

Attention! Before you replace the coil, find a clean section of ground, because after a

coil replacement a ground balance is required.

Or, if a clean place cannot be found, have a piece of ferrite, or use a piece of red

brick. Secure the desired coil on the rod, wrap the wire around the rod and plug the

connector into the control box.

Hold the device at a distance of half a meter between the coil and the ground and

away

from metal objects, turn on the unit while holding down the button on the

instrument panel. Keep the button pressed until the detector stops playing the melody,

and the screen for a short time will display the value of the working frequency of the

coil.

Attention! The exact frequency displayed can vary depending on the coil and

software and is automatically calculated by the device. For example a Coil with a

frequency 7.0 kHz, can vary

± 20 Hz.

After this, your device will automatically

navigate into the ground balancing mode.

(Fig. 15) Perform the auto ground balance on

the clean area of ground you located prior to

changing the coil. Refer to appropriate paragraph

under section “Ground Balance”. Alternatively if a

section of clean ground cannot be located perform Fig. 15

the balance procedure using a piece of ferrite or

red brick. Refer to the instruction pertaining to this under the section “Ground Balance”

Pressing exits the balancing mode. Your device is now ready to work with the

new coil.

Attention! All of the above procedures are necessary when making changes to the

software version (flashing).

If your unit is equipped with several periodically used coils we recommend that you in

the case of a shutdown (e.g. seasonal), before starting the search to restart the detector,

i.e., to avoid confusion, to adapt the electronic unit to the sensor (coil).

SEARCH AND IDENTIFICATION METHODS

When scanning the ground move the coil smoothly over the surface of the ground

while maintaining a constant distance of 2-3 cm This distance is optimal from the

viewpoint of suppressing the influence of ground mineralization, and hence, for the proper

identification of the metal objects. Avoid touching the ground with the coil. It is important

that the distance between the coil and the ground remain constant (see Figure 16). Keep in

mind that the quality of this operation has a direct impact on the correct identification of

desired targets. Also try not to make sudden movements of the coil horizontally. Optimal

scanning speed is 40-50 cm/s. Each pass of the sensor should overlap the previous one.