DCS ADR24 Instructions d'exploitation télécharger pdf (Page 57)

VEGASON 51P … 53P 57

Setup

The user programmable linearisation curve is

generated by index markers. Each index

marker consists of a value pair. A value pair

is generated from a value "

Linearised

“ and a

value "

Percentage value

“.

“Percentage value”

represents the distance as a percentage of

the level. "

Linearised

“ represents the per-

centage of vessel volume at a certain per-

centage of the level.

In the field "

Transfer measured value

“ the

current level as a percentage of the adjusted

span is displayed. The measuring window

has already been adjusted with the min./max.

adjustment. In the example, the span is

4.58 m and is between 5.85 m (empty) and

1.27 m (full), see the following presentation.

0 m

100 % or 1.27 m

95.79 % or 1.463 m

Span

4.58 m

100 %

4.387 m

(95.79 %)

5.85 m or 0 %

5.85 m meas. distance correspond to 0 %

level. 1.27 m meas. distance correspond to

100 % level. The span is therefore 4.58 m

(5.85 m – 1.27 m = 4.58 m).

A percentage value of 95.79 % then means

that 4.387 m of the adjusted span (4.58 m)

have been reached:

4.58 • 0.9579 = 4.387 m.

The distance (product distance), outputted

by the sensor, if you have chosen "

Distance

“,

is then:

5.85 – (4.58 • 0.9579) = 1.463 m.

If the index markers or value pairs of your

vessel are not known, you must gauge the

vessel incrementally or calculate it with the

vessel calculation program of VVO.

Defining the linearisation curve by incre-

mental filling

In the characteristics of the example, you see

four index markers or value pairs. There is

always a linear interpolation between the

index markers. The example vessel consists

of three cylindrical segments of different

height and diameter. The middle segment

has a considerably smaller diameter.

• Click in the check box "

“, to have the selected unit of measure-

ment displayed on the y-axis (left bottom

part in the menu window).

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