Parabolic effects of rounded or arched vessel tops, Mounting and installation – VEGA VEGASCAN 850 User Manual
Page 51
VEGASCAN 850
51
<
100 mm
Wrong
Mounting on a vessel with parabolic tank top
Correct
~
1
/
2
vessel
radius
Wrong
Parabolic effects of rounded or arched
vessel tops
Round or parabolic tank tops act on the sig-
nals like a parabolic mirror. If the sensor is
placed at the focal point of such a parabolic
tank top, the sensor receives amplified false
echoes. The optimum location is generally in
the area of half the vessel radius from the
centre.
2 m
4 m
6 m
8 m
10 m
20 m
30 m
B
A
max. meas.
distance
Distance of the
transducer to the
vessel wall
Curve 1 (liquids)
Curve 2 (solids)
Distance from the sensor to the vessel wall, depend-
ing on the meas. distance (type 54 … 56)
Mounting and installation
1 m
2 m
3 m
4 m
5 m
5 m
10 m
15 m
B
A
max. meas.
distance
Distance of the
transducer to the
vessel wall
Curve 1 (liquids)
Curve 2 (solids)
Distance from the sensor to the vessel wall, depend-
ing on the meas. distance (type 51 … 53)
- VEGABAR 25 (24 pages)
- VEGAFLEX 55K (32 pages)
- VEGABAR 17 (36 pages)
- D80 Hydrostatic pressure transmitters (40 pages)
- VEGAMET 513 (52 pages)
- D81 Hydrostatic pressure transmitter (44 pages)
- VEGASTAB 690 (12 pages)
- VEGASWING 83 fail safe and signal conditioning instrument VEGATOR 526 Ex (28 pages)
- VEGACONNECT 2 (4 pages)
- D81 METEC Hydrostatic pressure transmitter (44 pages)
- VEGAPULS 45 4 … 20 mA; HART compact sensor (72 pages)
- VEGAMET 515 (68 pages)
- VEGAFLEX 52K (32 pages)
- Capacitive electrodes EK Profibus PA (56 pages)
- VEGATOR 631 S1 (4 pages)
- VEGAPULS 63 (≥ 2.0.0 - ≤ 3.8) 4 … 20 mA_HART - two-wire (68 pages)
- Capacitive electrodes EK 4 … 20 mA - Compact (40 pages)
- VEGABAR 65 4 … 20 mA_HART (76 pages)
- VEGABAR 64 Profibus PA (80 pages)
- VEGABAR 44 4 … 20 mA (28 pages)
- VEGADIS 50 Ex (8 pages)
- VEGAPULS 51V…54V (96 pages)
- VEGAFLEX 54P (Profibus PA) (48 pages)
- VEGASEL 643 (16 pages)
- VEGAPULS 56K (68 pages)
- VEGAFLEX 54K (36 pages)
- VEGABAR 41 HART (44 pages)
- VEGATOR 537 Ex (16 pages)
- VEGACAP 82-98 (36 pages)
- VEGADIS 371 Ex (20 pages)
- Capacitive electrodes EL Profibus PA (56 pages)
- VEGAFLEX 52V (36 pages)
- VEGAFLEX 51K (32 pages)
- VEGALOG 571 EP (Ex) (32 pages)
- D84 Hydrostatic pressure transmitter (44 pages)
- VEGABAR 64 Foundation Fieldbus (80 pages)
- VEGABAR 61 4 … 20 mA_HART (80 pages)
- VEGASON 54P…56P Profibus PA (68 pages)
- D77 Hydrostatic pressure transmitters (24 pages)
- VEGATRENN 546 Safety barrier type 146 (8 pages)
- VEGASON 71 - 1 … 75 - 1 (52 pages)
- VEGABAR 40 HART (40 pages)
- Capacitive electrodes EL … (44 pages)
- VEGABAR 24 (28 pages)