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Operating Instructions - VEGAPULS 54K enamel

Operating Instructions - VEGAPULS 54K enamel

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24 101-EN-041227<br />

Mounting and installation<br />

Strong product movements<br />

Strong turbulence in the vessel, e.g. caused<br />

by powerful stirrers or strong chemical reactions,<br />

can seriously interfere with the measurement.<br />

A surge or bypass tube (see<br />

illustration) of sufficient size always enables<br />

reliable and problem-free measurement even<br />

if strong turbulence occurs in the vessel,<br />

provided there is no product buildup in the<br />

tube.<br />

Correct Incorrect<br />

> 500 mm<br />

Strong product movements<br />

100 %<br />

75 %<br />

Products tending to slight buildup can be<br />

detected by using a measuring tube with<br />

150 mm nominal width or more. In a measuring<br />

tube of this size, buildup does not cause<br />

any problems.<br />

0 %<br />

2.4 Common installation mistakes<br />

Socket piece too long<br />

If the sensor is mounted in a socket extension<br />

that is too long, strong false echoes are<br />

generated which interfere with the measurement.<br />

Make sure that the horn antenna protrudes<br />

at least 10 mm out of the socket piece.<br />

Correct Incorrect<br />

<strong>VEGAPULS</strong> <strong>54K</strong> <strong>enamel</strong> 13<br />

> 10 mm<br />

Correct and incorrect socket length<br />

Parabolic effects on dished or arched<br />

vessel tops<br />

Round or parabolic tank tops act on the radar<br />

signals like a parabolic mirror. If the radar<br />

sensor is placed at the focal point of such a<br />

parabolic tank top, the sensor receives amplified<br />

false echoes. The optimum mounting<br />

location is generally in the range of half the<br />

vessel radius from the centre.<br />

< 10 mm<br />

1 /2<br />

radius<br />

Correct<br />

Mounting on a vessel with parabolic tank top<br />

Incorrect<br />

Incorrect

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