Radio Shack Detector Owner's Manual download pdf (Page 4)

SETTING THE MODE

The metal detector distinguishes between ferrous and non-ferrous

metals. Ferrous metals contain iron, while non-ferrous metals (such as

gold, silver, copper, platinum, aluminum, lead, and zinc) do not.

You can set the metal detector to discriminate between a variety of

precious and non-precious metals, then follow the instructions in “Out-

door Testing and Use” on Page 3 to use the metal detector.

To select the desired mode, press

ALL METAL

DISC

NOTCH

, or

AUTO

NOTCH

while the power is on.

Note:

The metal detector is preset to begin in the

ALL METAL

mode.

Using the ALL METAL Mode

Set the metal detector to

ALL METAL

to detect all types of metal with-

out discrimination.

Note:

DISC/NOTCH

does not affect operation in this mode.

1. See “Adjusting GROUND BALANCE” on Page 5 to set

GROUND

BALANCE

properly, ensuring proper mineral elimination.

2. Push

GROUND TRAC

after adjusting

GROUND BALANCE

to lock in

the setting.

Each time you adjust

GROUND BALANCE

, press

GROUND TRAC

The metal detector sounds a medium tone for all targets.

Using the DISC Mode

Set the metal detector to

DISC

(motion discriminate) mode to detect

valuable metal objects while rejecting most junk targets.

1. Press

DISC

to select that mode.

2. Adjust

DISC/NOTCH

to differentiate between various types of met-

als. Rotate

DISC/NOTCH

•

fully counterclockwise

to detect all metals (including iron, nick-

els, and gold rings, along with pull-tabs and copper or silver

coins).

•

slightly clockwise

to eliminate small iron objects, then medium

iron objects.

•

more clockwise

to eliminate larger iron objects, followed by

items such as foil and aluminum, while still detecting silver and

copper (depending on how high

DISC/NOTCH

is set).

•

fully clockwise

to eliminate most gold and nickels.

Three distinct tones sound when the metal detector targets an item.

See “Understanding Three-Tone Audio Target Identification (ATI)”.

Using NOTCH Mode

Set the metal detector to

NOTCH

to create a variable rejection thresh-

old that detects nickels, gold rings, and silver or copper coins while

eliminating most iron targets, pull-tabs, and foil.

Note:

Some pull-tabs or tab pieces have nearly the same detection

properties as nickels and some gold rings. These items cannot be sep-

arated.

1. Press

NOTCH

to select that mode.

2. Place the rejection target on the ground and pass the metal detec-

tor over it.

3. As you pass the metal detector over the rejection item, adjust

DISC/NOTCH

to the point at which the tab (or any other desired

object) is rejected so the metal detector does not sound a tone.

4. To test the

NOTCH

setting, set a nickel on the ground and pass the

metal detector over it to make sure it is still accepted.

Three distinct tones sound when the metal detector targets an item.

(See “Understanding Three-Tone Audio Target Identification (ATI)”.)

Using AUTO NOTCH Mode

Set the metal detector to

AUTO NOTCH

to have the metal detector au-

tomatically discriminate target items, rejecting most iron junk targets

while detecting nickels and small gold items. You can also adjust the

discrimination threshold to be wider (eliminating more junk targets),

but the starting position remains the same.

Note:

You cannot detect some gold rings while in

AUTO NOTCH

mode.

You may also detect a small percentage of pull-tabs, especially those

that are broken in half.

1. Press

AUTO NOTCH

to select that mode.

2. Rotate

DISC/NOTCH

toward

HIGH

to increase the

NOTCH

width to

reject screw caps and zinc pennies, while still detecting nickels

and gold rings.

3. Adjust

DISC/NOTCH

to widen the discrimination window.

For example, you can eliminate zinc pennies and screw caps by

turning

DISC/NOTCH

clockwise.

Three distinct tones sound when the metal detector targets an item.

(See “Understanding Three-Tone Audio Target Identification (ATI)”.)

UNDERSTANDING THREE-TONE AUDIO

TARGET IDENTIFICATION (ATI)

When the metal detector is in

DISC

NOTCH

, or

AUTO-NOTCH

modes,

its Audio Target Identification (ATI) system automatically classifies

metal objects into three categories, to make it easier to identify the

type of target being detected. The detector sounds three distinct tones

to distinguish between categories of detected items.

Note:

When operating in the

ALL METAL

mode, ATI shuts down, and

the metal detector emits only one constant tone (medium) when it de-

tects a target.

Target Object

Sounding Tone

Low Medium High

small gold and nickel items X

larger gold* items (still reading in the GOLD

RANGE of the PROBABLE TARGET ID)

old/new pull-tabs

†

, some gold and zinc pennies

(dated after 1982), quarters and dimes

silver, brass, and copper — including pennies,

dated prior to 1982 — in any mode, except ALL

METAL

iron

‡

or steel — in DISC mode X

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Radio Shack Detector Owner's Manual Page 4

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