bürkert 8136 Bedienungsanleitung Seite 35

LEVEL TRANSMITTER 8136 • 4 ... 20 mA/HART - two-wire
– Quick adaptation to changing reflection conditions through
vessel change
– False signal suppression required
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
– Ice and condensation on the antenna possible
– Spiders and insect nestle in the antennas
– Floating material and animals sporadically on the water surface
•
Properties, sensor:
– Stable and reliable measured values through high averaging
– Insensitive in the close range
Open flume (flow measurement):
•
Gauge rate of change: slow gauge change
•
Process/measurement conditions:
– Ice and condensation on the antenna possible
– Spiders and insect nestle in the antennas
– Smooth water surface
– Exact measurement result required
– Distance to the water surface normally relatively high
•
Properties, sensor:
– Stable and reliable measured values through high averaging
– Insensitive in the close range
Rain water overfall (weir):
•
Gauge rate of change: slow gauge change
•
Process/measurement conditions:
– Ice and condensation on the antenna possible
– Spiders and insect nestle in the antennas
– Turbulent water surface
– Sensor flooding possible
•
Properties, sensor:
– Stable and reliable measured values through high averaging
– Insensitive in the close range
Demonstration:
•
Adjustment for all applications which are not typically level meas-
urement
– Instrument demonstration
– Object recognition/monitoring (additional settings required)
•
Properties, sensor:
– Sensor accepts all measured value changes within the measur-
ing range immediately
– High sensitivity against interferences, because virtually no
averaging
Caution:
If liquids with different dielectric constants separate in the vessel, for
example through condensation, the radar sensor can detect under
6 Set up with the display and adjustment module
35