Vega VEGAPULS 67 Operating Instructions Manual page 38

6 Set up with the display and adjustment module
38
– High accuracy
– False signal suppression required
Stirrer vessel (reactor):
•
Setup: all vessel sizes possible
•
Product speed:
– Fast to slow filling possible
– Vessel is filled and emptied very often
•
Vessel:
– Socket available
– Large agitator blades of metal
– Vortex breakers, heating spirals
•
Process/measurement conditions:
– Condensation, buildup by movement
– Strong spout generation
– Very agitated surface, foam generation
•
Properties, sensor:
– Higher measurement speed through less averaging
– Sporadic false echoes are suppressed
Dosing vessel:
•
Setup: all vessel sizes possible
•
Product speed:
– Fast filling and emptying
– Vessel is filled and emptied very often
•
Vessel: tight installation situation
•
Process/measurement conditions:
– Condensation, buildup on the antenna
– Foam generation
•
Properties, sensor:
– Measurement speed optimized by virtually no averaging
– Sporadic false echoes are suppressed
– False signal suppression recommended
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
•
Properties, sensor:
– Measurement speed optimized through little averaging
– Entering the tube inside diameter takes the running time shift
into consideration
– Echo detection sensitivity reduced
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
VEGAPULS 67 • 4 ... 20 mA/HART - four-wire