VEGA VEGAFLEX 55K - Manual (Page 23)

VEGAFLEX 55K 23
Setup
2. Conditioning
Under the menu item " Conditioning" you
choose the distance at 0 % and at 100 %
filling. Then you enter the physical quantity
and the unit as well as the decimal point.
• Enter in the menu window "
0 % corre-
spond" the value of the 0 % filling. This will
be e.g. "80" for 80 liters.
• Confirm with " OK".
• With the arrow key you switch to the 100 %
menu. Enter here the value of your param-
eter corresponding to a 100 % filling. E.g.
"1200" for 1200 liters.
• Confirm with " OK".
• If necessary, choose a decimal point. Note
that max. 4 digits can be shown.
• In the menu " prop. to", you choose the
parameter (mass, volume, distance…),
• In the menu " Unit", you choose the physical
unit (kg, l, ft 3 , gal, m 3 …).
• With the "ESC" key, you go back to the next
higher menu level. With the arrow key, you
choose the next menu item.
• In the menu "Lin. curve", you can choose
between three standard linearisation
curves.
A linear correlation between percentage
value of the product distance and the per-
centage value of the filling volume has
been preset.
You can choose between linear, spherical
and cylindrical tank. Entering a user-pro-
grammable curve is only possible with the
PC and the adjustment program VVO.
• In the menu item "Integration time", you can
set a delay period for the signal output.
3. Outputs
Under the menu " Outputs", you determine
e.g. if the current output should be inverted,
or which parameter should be indicated on
the sensor display.
4. Operating range
Without special adjustment, the operating
range corresponds to the measuring range.
The measuring range was already adjusted
with the min./max. adjustment. It is generally
better to choose a slightly wider span for
operating range (approx. 5 %) than for the
measuring range (span).
Example:
Min./Max. adjustment: 0.300 … 5.850 m; set
operating range to approx. 0.250 … actual
tube length.
5. Meas. conditions
With these functions, you can enter the ambi-
ent conditions in the vessel (see menu sche-
matic).
6. Useful level and noise level
In the menu "Info", you get important informa-
tion on the signal quality of the product echo.
The higher the "
S-N" value, the more reliable
the measurement.
Ampl.: Means amplitude of the product echo
in dB (useful signal level)
S-N: Means Signal-Noise (useful signal
level minus noise level)
The higher the S-N value (useful signal
level minus noise level), the higher the reliabil-
ity:
> 30 dB
Measurement good
10 … 30 dB Measurement satisfactory
< 10 dB Measurement bad