DCS ADR24 Operations Instructions download pdf (Page 68)

68 VEGASON 51P … 53P

Ampl.:

dB

S-N:

dB

Lin.

curve

Integra

tion

time

Adjust

ment

Signal

condit

ioning

Scal

ing

• Confirm with "

OK

“.

If necessary, choose a decimal point. How-

ever, note that only max. 4 digits can be

displayed. In the menu "

prop. to

“ you choose

the physical quantity (mass, volume, dis-

tance…) and in the menu "

Unit

“ the physical

unit (kg, l, ft

3

, gal, m

3

…).

Linearisation:

A linear correlation between the percentage

value of the product distance and percent-

age value of the filling volume is preadjusted.

With the menu "Lin. curve“ you can choose

between linear, spherical tank and cylindrical

tank. The generation of a customized lineari-

sation curve is only possible with the PC and

the adjustment program VVO.

(see menu schematic)

A false echo storage is always useful when

unavoidable false echo sources (e.g. struts)

must be minimised. By creating a false echo

storage, you authorise the sensor electronics

to record the false echoes and save them in

an internal database. The sensor electronics

treats these (false) echoes differently from

the useful echoes and filters them out.

In the menu

you get important information on the signal

quality of the product echo. The higher the

"S-N“ value, the more reliable the measure-

ment (menu schematic MINICOM).

Ampl.: means amplitude of the level echo in

dB (useful level)

S-N: means Signal-Noise, i.e. the useful

level minus the level of the back-

ground noise

The bigger the "S-N“ value (difference be-

tween the amplitudes of the useful signal and

the background noise), the better the meas-

urement:

> 50 dB Measurement excellent

40 … 50 dB Measurement very good

20 … 40 dB Measurement good

10 … 20 dB Measurement satisfactory

5 … 10 dB Measurement sufficient

< 5 dB Measurement poor

Ampl. = 68 dB

S-N = 53 dB

68 dB – 53 dB = 15 dB

This means that the noise level is only

68 dB – 53 dB = 15 dB.

A 15 dB noise level with a 53 dB higher signal

level would ensure a high degree of meas-

urement reliability.

Under the menu "Outputs“ you determine, for

example, if the current output should be

inverted, or which unit of measurement

should be shown on the sensor display.

Setup

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