VEGA VEGASON 63 Profibus PA - Manual (Page 11)

11
4 Mounting
VEGASON 63 • Profibus PA
28786-EN-130417
1
2
Fig. 3: Minimum distance to the max. level
1 Dead band
2 Reference plane
Information:
If the medium reaches the transducer, buildup can form on it and
cause faulty measurements later on.
1 3 2
100%
0%
Fig. 4: Measuring range (operating range) and max. measuring distance
1 full
2 empty (max. measuring distance)
3 Measuring range
Gauge pressure in the vessel does not influence VEGASON 63. Low
pressure or vacuum does, however, damp the ultrasonic pulses. This
influences the measuring result, particularly if the level is very low.
With pressures under -0.2 bar (-20 kPa) you should use a different
measuring principle, e.g. radar or guided microwave.
4.2 Mounting instructions
When mounting the VEGASON 63, keep a distance of at least
200 mm (7.874 in) to the vessel wall. If the sensor is installed in the
center of dished or round vessel tops, multiple echoes can arise.
These can, however, be suppressed by an appropriate adjustment
(see chapter "Setup").
If you cannot keep this distance you should carry out a false echo
storage before setup. This applies mainly if buildup on the vessel wall
Pressure/Vacuum
Installation position