42
6 Set up with the display and adjustment module
NCR-84 Two-wire 4 … 20 mA/HART
51141-EN-181127
•
Properties, sensor:
– Low sensitivity to sporadic false echoes
– Stable and reliable measured values through averaging
– High measurement accuracy
– False signal suppression required
Stirrer vessel (reactor)
•
Setup: all vessel sizes possible
•
Medium 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
•
Medium 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
Plastic tank
•
Vessel:
– Instrument fix mounted or built in
– Measurement through the vessel top, if appropriate to the
application
– With empty vessel, the measurement can go through the bot-
tom
•
Process/measurement conditions:
– Condensation on the plastic ceiling
– In outdoor facilities, water and snow on vessel top possible
•
Properties, sensor:
– False signals outside the vessel are not taken into consideration
– False signal suppression recommended
925-0373 Rev A