UNDATEC Flow Measurement Solutions
Frank Stark - Wiesenstrasse 23 - D-75248 Oelbronn-Duerrn / Germany - T49 (0) 7237-7804
Email: [email protected]
Diagram and explanation of „Function 98“
The "Function 98" is useful for large channels or filling levels.
Since the flow rate distribution is non-linear in a channel, but is similar to a hyperbola, it may be
necessary to calculate a logarithmic curve at high flow levels from low flow levels relatively linear flow
rate curve.
This is necessary because of the velocity measuring sensor is able to measure up to a filling level of
about 400mm safely. An increasing velocity at higher filling levels can not be measured and then
calculated with the "Function 98".
Füllhöhe
(Level)
Einsatzpunkt 1
(Triggerpoint 1)
Fließgeschwindigkeit (Velocity)
Füllhöhe
(Level)
Fließgeschwindigkeit (Velocity)
Tatsächliche Fließgeschwindigkeit
(actual velocity)
Ko
rri
gie
rte
F
lie
ßg
es
ch
wi
nd
igk
eit
(c
or
re
cte
d v
elo
cit
y)
Gemes
sene F
ließges
chwind
igkeit
(meas
ured ve
locity)
Einsatzpunkt 2
(Triggerpoint 2)
Einsatzpunkt 3
(Triggerpoint 3)
usw.
etc.
