White Spectra VX3 Manual de instrucciones descargar pdf (Pagina 13)

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Spectra VX

User’s Guide

To replace the batteries, slide open the battery holder lid by gen-

tly lifting the tab.

A fresh set of alkalines will operate VX

for about 7-8 hours

with no backlight. Use of the backlight will reduce battery life.

When you first power-up VX

a start-up screen will display

briefly with the battery voltage at the bottom. During operation,

if the battery voltage drops below 8 volts a low-battery icon will

display in the status bar:

You can also check the voltage at any time by selecting Back-

light,VIEW

from the Live Control Bar, or pressing

MENU+ENTER to bring up the Info screen.

automatically powers off if no activity occurs in a 20

minute time span. Activity is defined as the use of the keypad or

the trigger switch.

The Basics of VLF Operation

is a multi-frequency (MF) induction-balance (IB) very

low frequency (VLF) transmit-receive (TR) metal detector. In

order to understand what all the user adjustments do, it is

important to have at least a rudimentary understanding of how a

modern metal detector works.

Metal detectors work on the principle of induction, discov-

ered by Michael Faraday in 1831. The typical induction-balance

metal detector

uses a transmit coil to produce a magnetic field,

and this magnetic field in turn produces a small reaction in

nearby metal targets. A receive coil is used to detect this small

1. The first practical metal detector was an induction-balance

design, built by Alexander Graham Bell in an effort to locate an

assassin’s bullet lodged in US President James Garfield. He

failed — not enough sensitivity. Ever since then, “more sensitiv-

ity” has been the goal of every detector.

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White Spectra VX3 Manual de instrucciones Pagina 13