VEGA VEGAFLEX 51K - Manual (Page 23)

VEGAFLEX 51K 23
Setup
2. Conditioning
Under the menu item " Conditioning“, you
choose the distance at 0 % and at 100 %
filling. Then you enter the the physical quan-
tity and the unit, as well as the decimal point.
• Enter in the menu window "
0 % corre-
sponds“ the value of the 0 % filling. This will
e.g. "80“ for 80 liters.
• Confirm with " OK“.
• With the arrow key you change to the
100 % menu. Enter here the value of your
parameter 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, i.e. physical quantity (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.
Preadjusted is a linear correlation between
the percentage value of the product dis-
tance and the percentage value of the
filling volume.
You can choose between linear, spherical
tank and cylindrical tank. Entering a user-
programmable 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
suitable 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 … real
cable length.
When shortening the cable, the cable length
has to be redefined.
5. Meas. conditions
With these functions you can enter the ambi-
ent conditions in the vessel
(see menu item)
6. Useful signal 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 (noise level)
S-N: Means Signal-Noise (useful signal
level minus noise level)
The higher the S-N value (useful level minus
noise level), the better the reliability:
> 50 dB
Measurement very good
40 … 50 dB Measurement good
20 … 40 dB Measurement satisfactory
15 … 20 dB Measurement sufficient
< 15 dB Measurement bad