RIDGID metal detector User Manual download pdf (Page 2)

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The E-Z Tec

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Metal Detec-

tor is an extremely sensitive

instrument used to detect the

presence of ferrous and

nonferrous metals.

All industries which need

product purity need metal

detectors. The list of examples

is almost endless, and includes

food, textile, rubber, plastic,

wood products, chemical,

cosmetic, pharmaceutical and

many other industries.

Besides the obvious benefit

of product purity, the metal

detector will also protect

downstream equipment from

damage caused by metal in the

product stream.

Metal can enter the

production process with the

raw material or can get into

the product due to wear or

failure of processing equip-

ment components. Detecting

pieces of broken machinery

can help resolve equipment

problems before major damage

occurs. Thus, equipment

downtime is reduced and

productivity is increased.

PRINCIPLE OF OPERATION

The E-Z Tec

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Metal Detector uses a

balanced three–coil arrangement

wound around the aperture to sense

metal moving through it. The center

(oscillator) coil emits an electromag-

netic field throughout the space within

the metal detector housing. Two

receiver coils (placed equidistant on

either side of the oscillator coil) are

connected in series so that the energy

coupled from the oscillator coil to

either of the receiver coils exactly

cancels the energy coupled to the other

receiver coil; the net output of this pair

is essentially zero. Metal passing

through this set of coils creates an

imbalance which, if the signal’s

amplitude is great enough, will result

in a detection.

SENSITIVITY

The sensitivity of a metal detector is

usually defined as the diameter of the

smallest sphere which is always detected.

Many factors influence the sensitivity

that can be attained. These include:

product characteristics, type and shape of

metal to be detected, aperture dimen-

sions, and the position of the metal

particle within the aperture. Actual

production line sensitivities can be

estimated more accurately when installa-

tion conditions and the customer’s

product are considered.

FEATURES

• Stainless Steel Design – The

oscillator and receiving coils are

wound on a rigid frame and

encapsulated in a stainless steel shell

(USDA/FDA and CSA approved).

• NEMA 4X Controls – The controls are

housed in a water–tight, dust–tight

and corrosion resistant stainless steel

enclosure. Other NEMA ratings are

available upon request.

• Remote Cable (up to 100 ft)(30m) is

supplied for connecting the remote

electronics to the sensing head.

• Extremely Sensitive – Detection

capabilities as small as 0.3 mm.

• Crystal Oscillator provides stable,

drift–free frequency reference.

• Status Lights (E-Z Tec V Only) are

located behind the transparent

NEMA 4 door. Bright green “ready”

and red “detect” lights let you

determine status instantly.

• Electronics (E-Z Tec V Only) – E-Z

Tec digital circuitry is a high–

quality system with easily

removable printed circuit boards.

An LED bar graph provides a

continuous display of sensitivity

and phase effect, invaluable for

optimizing performance.

Metal Detector Overview

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©2004 ERIEZ MAGNETICS ALL RIGHTS RESERVED

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