Milltronics PL-521 Manuale utente

XPS/XCT Series Transducers

Technology based. Customer driven.

August 1998

Instruction Manual

PL-521

33455210

Rev 1.2

hank you for purchasing Milltronics products. We endeavour to design

equipment that is simple to use and reliable in its operation, with the aim

of satisfying our customers' needs.

Milltronics has been designing and manufacturing process equipment since

1954. Our fields of expertise include ultrasonic and capacitance level

measurement, in-line weighing of dry bulk solids and motion sensing.

Milltronics is established world wide through associate offices and

representatives. Our network is continually being refined to provide our

customers with first rate sales information, engineering assistance and after

sales support.

For more details on our products and service, please contact us and we will

provide you with a listing of the offices or representatives nearest you.

ABOUT THE TRANSDUCER

The Echomax XPS / XCT series of transducers

operates in association with Milltronics ultrasonic

level monitoring products.

The transducer converts the electrical energy of the

transmit pulse from the transceiver into acoustical

energy. It then converts the acoustical energy of

the echo back into electrical energy for the

transceiver receive period.

The effective acoustical energy is emitted from

the transducer face and radiated outward,

decreasing in amplitude at a rate inversely

proportional to the square of the distance.

Maximum power is radiated axially (perpendicular)

from the transducer face in a line referred to as

the axis of transmission. Where power is reduced

by half (– 3 dB), a conical boundary defining the

sound beam, centered about the axis of transmission,

is established. The diametric measurement of the

cone in degrees defines the beam angle. Impedance

matching techniques are used to optimize the transfer of

power from the transducer into air and vice versa.

The XPS / XCT transducers incorporate an integral temperature sensor that reports the air

temperature at the transducer to the transceiver. The connection is transparent, in that both

the ultrasonic and temperature components of the transducer use the same leads.

transducer

transducer face

– 3 db

boundary

axis of

transmission,

perpendicular to

transducer face

PL-521 3

SPECIFICATIONS

* approximate shipping weight of transducer with standard cable length

* * EMC performance available upon request

Kynar® is registered trade mark of ELF Atochem

1998/11/17

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CE **, CSA, FM, SIRA/CENELEC

PL-521 4

OUTLINE AND DIMENSIONS

radiating face

optional submergence shield

refer to associated instructions

optional bonded flange

refer to associated instructions

standard

optional split flange

refer to associated instructions

Model

Dimension XPS - 10 XPS - 15 XPS - 30 XPS - 40 XCT - 8 XCT - 12

A 86 mm (3.4") 119 mm (4.7") 173 mm (6.8") 206 mm (8.1") 86 mm (3.4") 119 mm (4.7")

B 122 mm (4.8") 132 mm (5.2") 198 mm (7.8") 229 mm (9.0") 122 mm (4.8") 132 mm (5.2")

C to suit ANSI, DIN and JIS standards

D* 128 mm (5.0") 138 mm (5.4") 204 mm (8.0") 235 mm (9.2") 128 mm (5.0") 138 mm (5.4")

E 124 mm (4.9") 158 mm (6.2") n / a n / a n / a n / a

F 152 mm (6.0") 198 mm (7.8") n / a n / a n / a n / a

* nominal

PL-521 5

MOUNTING

DO’S AND DON’TS

Mount the transducer so that it is

above the maximum material level by at least the blanking

value

. Refer to the associated transceiver manual.

On liquid applications, the transducer must be mounted so that the axis of transmission is

perpendicular to the liquid surface.

On solids applications, a Milltronics Easy Aimer should be used to facilitate aiming of

the transducer.

Do not overtighten mounting

. Hand tightening of the mounting hardware is sufficient.

Secure installation by connecting a safety chain from the transducer to a structural member.

Consider the optional

temperature sensor

when mounting the transducer.

MOUNTING - SOLIDS APPLICATIONS

Easy Aimer

(typical model)

transducer

safety chain

PL-521 6

MOUNTING - LIQUID APPLICATIONS

Flexible Conduit Bracket

Submersible Plywood

rigid metal conduit

coupling

transducer

safety

chain

flexible

conduit

steel channel

coupling

safety

chain

submergence

shield

Flexible conduit mounted transducer should

not be subjected to wind, vibration or jarring.

Submersible transducer, used in

applications where flooding is possible. Plywood mounting provides excellent

isolation, but must be rigid enough to

avoid flexing if subjected to loading.

PL-521 7

MOUNTING - LIQUID APPLICATIONS (cont’d)

nipple welded to blind flange

customer flange, flat face only

factory flanged transducer

bolt

gasket

nut

coupling

Customer flanged standpipe. If a metal flange must be welded

to pipe, refer to Liquid \ Applications - Standpipes.

Flanged

Flange, gasket and hardware supplied by customer.

Refer to Liquid \ Applications - Standpipes.

coupling

Blind Flange

PL-521 8

INTERCONNECTION

Direct Connection

2 Wire Extension

Coaxial Extension

blk wht

drain / shield

Milltronics transceiver ( typical )

blk

drain / shield

wht

extend cable using 18 AWG shielded / twisted pair

extend cable using RG - 62 A/U coax for optimum noise immunity

junction box

PL-521 9

DO’S AND DON’TS

Installation shall only be performed by qualified personnel and

in accordance with local governing regulations.

Do not route cable openly.

For optimum isolation against electrical noise, run cable separately in a grounded

metal conduit.

Seal all thread connections to prevent ingress of moisture.

Do not run cable near high voltage or current runs, contactors and SCR control drives.

97/03/20

PL-521 10

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