VEGA VEGAPULS 51K…54K 4 … 20 mA; HART compact sensor - Manual (Page 22)

22 VEGAPULS 51K … 54K
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Strong product movements
Buildup
Correct Incorrect
Strong product movements
Strong turbulence in the vessel, e.g. caused
by powerful stirrers or strong chemical reac-
tions, can seriously interfere with the meas-
urement. A surge or bypass tube (see
illustration) of sufficient size always enables
reliable and problem-free measurement even
if strong turbulence occurs in the vessel,
provided there is no product buildup in the
tube.
Inflowing material
Correct Incorrect
Mounting and installation
Inflowing material
Do not mount the instrument in or above the
filling stream. Make sure that you detect the
product surface and not the inflowing mate-
rial.
Buildup
If the sensor is mounted too close to the
vessel wall, product buildup and other de-
posits on the vessel wall cause false echoes.
Position the sensor at a sufficient distance
from the vessel wall. Please also note chapter
"3.1 General installation instructions“.
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Correct Incorrect