Operating instructions

TS
d1
h1
h2
d2
1
L2
L1
Fig. 10: Interface measurement
1 Reference plane
d1 Distance to the interface, meas. loop 1
d2 Distance to the level, meas. loop 2
TS Thickness of the upper medium (d1-d2), meas. loop 3 (displayed value)
h1 Height - Interface (displayed value)
h2 Height - Level (displayed value)
L1 Lower medium
L2 Upper medium
8.2 Flow measurement
For flow measurement in open flumes, a contraction or
standardised flume must be used. Depending on the flow
volume, this contraction generates a certain backwater. The
flow can be determined from the height of this backwater. The
flow volume is outputted by an appropriate number of pulses
on the relay or current output.
Depending on the type and version, each flume generates a
different backwater. The data of the following flumes are
available in the instrument:
l Palmer-Bowlus-Flume
l Venturi flume, trapezoidal weir, rectangular weir
l V-Notch
Setup
The configuration of the flow measurement loop requires
PACTware™ with the suitable DTMs. The example refers to a
flow measurement with a radar sensor. The following setup
steps must be carried out:
l Selection of the parameter "Flow"
l Carrying out adjustment
Physical principle
Flume
VEGAMET 625 - Double channel H art signal conditioning instrument 43
Application examples
28970-EN-050616