Minelab F1A4 Servisní příručka stáhnout pdf (Strana 24)

Operations Manual

Page 24

5.3 Detector Sounds

The threshold tone is a safety tone and must be present to ensure

correct operation of the detector. If there is a persistent change in this

tone, the detector should be tested with the test piece before further

use of the detector. (see Section 5.4 for further information on testing

the detector.)

a. Threshold Tone - is the background tone produced by the detector.

The loudness of the threshold is set by the in-built microprocessor.

When the detector is turned On or after completing the Audio Reset

procedure, the threshold tone should be just audible.

The volume of the threshold tone will

seldom vary from the level set by the

microprocessor. If it does vary and is

too loud or too soft, repeat the Audio

Reset procedure.

b. Target Sound - is an abrupt variation

of the audio volume and pitch. The

pitch of the tone will vary depending

on the metal composition and size

of the target. (See Figure 11)

Target sounds will vary.

Different target sounds in the same area may indicate multiple targets.

All target sounds must be considered dangerous.

Figure 11 - Pitch varie

as the Coil passes over

a target

WARNING

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Minelab F1A4 Servisní příručka Strana 24