DCS ADR24 Instructions d'exploitation télécharger pdf (Page 23)

VEGASON 51P … 53P 23

Mounting and installation

4 Mounting and installation

4.1 General installation instructions

Measuring range

Beside other criteria, you select your instru-

ment according to the required measuring

range. The reference planes for the min. and

max. distance to the liquid or solid is the

transducer end or for instruments in flange

version, the instrument flange. Please note

the information on the reference plane in

chapter "3.3 Dimensions“. The max. filling

depends on the required min. distance of the

instrument used (0.25 m up to 0.75 m) and

the mounting location of the instrument or the

transducer.

Min. distance, max. measuring range and span (example VEGASON 51, 52 and 53)

Max. meas. distance: 4 m (type 51), 7 m (type 52), 15 m (type 53)

Full

Span

Min.

distance

Empty

Min.

distance

Min.

distance

0.25 m 0.4 m

0.75 m

Reference plane

Type 51

Type 53 Type 52

max. meas. range

Beam angle and false echoes

The ultrasonic impulses are focused by the

transducers. The impulses leave the trans-

ducer in conical form similar to the beam

pattern of a spotlight. The beam angle is 5.5°

(VEGASON 51/5) or 3° (VEGASON 53) at

-3 dB emitted power.

Any object, e.g. tubes or struts inside this

emission cone will cause a large false echo.

Especially within the first few meters of the

emission cone, pipes, struts, or other installa-

tions can interfere with the measurement. At a

distance of 6 m, the false echo of a strut has

an amplitude nine times greater than at a

distance of 18 m.

At greater distances, the energy of the ultra-

sonic impulses distributes over a large area,

thus causing weaker echoes from obstruct-

ing surfaces. The interfering signals are

therefore less critical than those at close

range.

If possible, orient the sensor axis perpen-

dicularly to the product surface and avoid

vessel installations (e.g. pipes and struts)

within the 100 % area of the emission cone.

The following illustration of the ultrasonic

beams is simplified and represents only the

main beam - a number of additional weaker

beams exists.

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 83 84

Commentaires sur ces manuels

Pas de commentaire

DCS ADR24 Instructions d'exploitation Page 23

Commentaires sur ces manuels

Produits connexes et manuels pour Réchauffeurs de nourriture DCS ADR24