VEGA VEGAPULS 41 Profibus PA - Manual (Page 23)

VEGAPULS 41 – Profibus PA 23
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Strong product movements
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 generally allows
reliable and problem-free measurement even
if strong turbulence occurs in the vessel,
provided there is no buildup of the product in
the tube.
Correct Incorrect
Buildup
Correct Incorrect
Inflowing material
Correct
Incorrect
Inflowing material
Do not mount the instrument in or above the
filling stream. Ensure that you detect the
product surface and not the inflowing mate-
rial.
Buildup
If the sensor is mounted too close to the
vessel wall, buildup and adhesions of the
measured product to the vessel wall cause
false echoes. Position the sensor at a suffi-
cient distance from the vessel wall. Please
also note chapter "3.1 General installation
instructions“.
Mounting and installation