NUS-7
Seite 16
NUS-7 K03/0617
P25: a Selection of Echo within the measuring window
FACTORY DEFAULT: 0
A so-called measuring window is formed around the echo signal. The position of
this measuring window determines the flight time for calculation of the distance to
the target. (the picture below can be seen on the test oscilloscope)
Received
signal
amplitude
Echo 1.
t
Echo 2.
t
Some applications involve multiple ( disturbing) echoes even within the
measuring window. Basic echo selection will be done by the Quest + software
automatically. This parameter influences the echo selection only within the
measuring window.
a
Echo in the window to
be selected
Remark
0
With the highest
amplitude
Most frequently used
1
First one
For liquids applications with multiple
echoes within the Measuring Window
P26: Level elevation rate (filling speed) (m/h or ft/h)
FACTORY DEFAULT: 2000
P27: Level descent rate (emptying speed) ) (m/h or ft/h)
FACTORY DEFAULT: 2000
These parameters provide additional protection against echo loss in applications
involving very heavy fuming. Correct setting increases reliability of the
measurement during filling and emptying. The parameters must not be smaller
than the fastest possible filling/emptying rate of the actual technology.
Attention!
Level changing rate is rather different near to the conical or spherical
bottom of such a vessel.
