VEGA VEGAPULS 63 (≥ 2.0.0 - ≥ 4.0.0) 4 … 20 mA_HART - four-wire - Manual (Page 32)

32
6 Set up with the display and adjustment module
VEGAPULS 63 • 4 … 20 mA/HART - four-wire
36512-EN-130228
– Vessel is very often filled and emptied
•
Vessel: narrow installation situation
•
Process/measurement conditions:
– Condensation, buildup on the antenna
– Foam generation
Standpipe:
•
Product speed: very fast filling and emptying
•
Vessel:
– Vent hole
– Joins like flanges, weld joints
– Shifting of the running time in the tube
•
Process/measurement conditions:
– Condensation
– Buildup
Bypass:
•
Product speed:
– Fast up to slow filling with short up to long bypass tube possible
– Often the level is hold via a control facility
•
Vessel:
– Lateral outlets and inlets
– Joins like flanges, weld joints
– Shifting of the running time in the tube
•
Process/measurement conditions:
– Condensation
– Buildup
– Separation of oil and water possible
– Overfilling into the antenna possible
Plastic tank:
•
Vessel:
– Measurement fix mounted or integrated
– Measurement depending on the application through the vessel
top
– With empty vessel, the measurement can be carried out
through the bottom
•
Process/measurement conditions:
– Condensation on the plastic ceiling
– In outside facilities water and snow on the vessel top possible
Transportable plastic tank:
•
Vessel:
– Material and thickness different
– Measurement through the vessel top
•
Process/measurement conditions:
– Measured value jump with vessel change
Open water (gauge measurement):
•
Gauge rate of change: slow gauge change
•
Process/measurement conditions:
– Distance sensor to water surface to big
– Extreme damping of output signal due to wave generation