VEGA VEGAPULS SR 68 4 … 20 mA_HART - four-wire User Manual

Page 47

6 Set up with the display and adjustment module

VEGAPULS SR 68 • 4 … 20 mA/HART - four-wire

38295-EN-130624

Note:

Check the distance to the product surface, because if an incorrect

(too large) value is entered, the existing level will be saved as a false

echo. The filling level would then no longer be detectable in this area.
If a false signal suppression has already been created in the sensor,

the following menu window appears when selecting "False signal

suppression":

The menu item "Delete" is used to completely delete an already cre-

ated false signal suppression. This is useful if the saved false signal

suppression no longer matches the metrological conditions in the

vessel.
The menu item "Extend" is used to extend an already created false

signal suppression. This is useful if a false signal suppression was

carried out with a too high level and not all false signals could be de-

tected. When selecting "Extend", the distance to the product surface

of the created false signal suppression is displayed. This value can

now be changed and the false signal suppression can be extended to

this range.

A linearization is necessary for all vessels in which the vessel volume

does not increase linearly with the level - e.g. a horizontal cylindri-

cal or spherical tank - and the indication or output of the volume is

required. Corresponding linearization curves are preprogrammed

for these vessels. They represent the correlation between the level

percentage and vessel volume.
By activating the appropriate curve, the volume percentage of the

vessel is displayed correctly. If the volume should not be displayed in

percent but e.g. in l or kg, a scaling can be also set in the menu item

"Display".

Enter the requested parameters via the appropriate keys, save your

settings and jump to the next menu item with the [ESC] and [->] key.
Caution:

Note the following if the instrument with corresponding approval is

used as part of an overfill protection system according to WHG:
If a linearization curve is selected, the measuring signal is no longer

necessarily linear to the filling height. This must be considered by the

Additional adjustments -

Linearization curve