64
VEGAPULS 56K
Ampl.:
XX dB
S-N:
XX dB
tion of the installation position). With the crea-
tion of a false echo storage you cause the
sensor electronics to learn the false echoes
and to save them in an internal database. The
sensor electronics treats these (false) echoes
differently than the useful echo and gates them
out.
7. Useful and noise level
In the menu
you receive important information on the signal
quality of the product echo.
The higher the amount out of "
Ampl.“ minus "S-
N“, the more reliable the measurement.
Ampl.: Means amplitude of the level echo in
dB (useful level)
S-N:
Means Signal-Noise, i.e. the level of
the background noise (noise level)
The larger the distance of the amplitude
(Ampl.) to the noise level (S-N), the better the
measurement:
> 18 dB
Measurement very good
18 … 13 dB
Measurement good
13 … 8 dB
Measurement satisfactory
8 … 5 dB
Measurement sufficient
< 5 dB
Measurement very bad
Example:
Ampl. = 68 dB
S-N = 53 dB
68 dB – 53 dB = 15 dB
15 dB signal distance mean a good reliability.
8. Outputs
Under the menu "
Outputs“ you determine if
e.g. the current output should be inverted or
Set-up
corresponding to a 100 %-filling. In the exam-
ple this would be 1200 for 1200 litres.
• Confirm with "
OK“.
If necessary, choose a decimal point. However
note that only max. 4 digits can be shown.
In the menu "
Prop. to“ you choose the param-
eter (mass, volume, distance…) and in the
menu "
Unit“ the meas. unit (kg, l, ft
3
, gal, m
3
…).
Linearisation:
A linear dependence between the percentage
value of the product distance and the percent-
age value of the filling volume is pre-adjusted.
With the menu "Lin. curve“ you can choose
between linear, spherical tank and cylindrical
tank. The adjustment of an own linearisation
curve is only possible with the PC and the
adjustment program VVO.
5. Meas. conditions
Here you choose the meas. conditions corre-
sponding to your application (see following
menu plan under no. 5).
6. False echo storage
A false echo storage is always useful when
false echo sources such as e.g. struts must be
reduced if not possible in another way (correc-
Lin.
curve
Linear
Integr
ation
time
0 s
Ad-
just-
ment
Signal
condit-
ioning
Scal-
ing
