C-SCOPE METADEC2 Instructions d'exploitation télécharger pdf (Page 14)

or

if Manual

Ground

Exclude

is

preferred

-OFF

DIAGRAM 10.

Heavily

Contaminated

Site

Method

1.

Any

position

overriden

by

AUDIO and METER

DISCRIM.

Either

set as

per

Manual

Ground

Exclude (P.

7.1

or

engage PRE-5ET

iii

Sensitivity Low

o

to

-5

Range

Tune

When AUDIO

or

METER

as

per

TUNING (P.

6.1

DISCRIM are

ON

th8S8

buttons

function

solely

One

of

the

85

RETUNE BUTTONS

Inland

Settings

and

either

may be used.

II

or

if Manual

Ground

Exclude

is

preferred

DIAGRAM

11.

Heavily

Contaminated

Sites

Method 2.

Sensitivity

LoVlf

----.

Oto

-5

Range

Any

position overriden

II

10

by

DISCRIMINATE

---Rf-

Tune

with

RETUNE (vii

or

(vii)

depressed as

per

TUNING (P.

6.1

01

UI8

DISCRIM

RETUNE

only.

-OFF

General Hints

Discriminating

When

used

in

the

All-metal Mode

the

METADEC

II

will

detect

all metals and

will

not

discriminate.

However, in

the

Meter and

Audio

Discriminate Modes

the

MET

ADEC

'I

has

been programmed

to

operate at a

fixed

discriminate

setting.

It

is

recommended

that

all objects

that

are

not

rejected should be dug, i.e.

if

the

meter needle does

not

dip

or

the

audio

pitch

is

inconclusive,

dig

the object.

Iron,

unlike

a

coin,

occurs

in

a

multitude

of

shapes and sizes. As a result

it

is

possible

that

large pieces

of

iron

may give a positive reading.

Iron

in

the

shape

of

nails

or

pieces

of

wire

also may be present

on the surface

of

a site.

In

this

case

anomalies

in

discrimination

may occur. Anomalies

or

confusing

signals can

only

occur

in

the

first

few

inches away

from

the

search head, and are characterised

by

a

double

signal

from

the

same

object, usually

iron,

which

often

ranges

from

a strong positive

to

a

strong negative signal.

To

overcome these problems

simply

raise the search head and re-scan

until

a

clear signal

of

rejection

or

acceptance

is

obtained.

Detection

Range

Detection ranges

will

vary depending

on

the size

of

the object, the length

of

time

an

object

has

been

buried. and

the

type

of

ground

the

object

is

buried

in.

The best ground

conditions

are well compacted soils and coins can be

found

at the greatest depths

if

the

object has been buried

for

some

time

and

the

coin

has

interacted

with

the salts

in

the

ground.

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