VEGA VEGASON 71 - 1 … 75 - 1 - Manual (Page 44)

Reduction of gain
44 71 - 1 … 75 - 1
Multiple false echo reduction MODE 1 - 12 and 1 - 13
Tanks with arched ceilings and therefore strong
parabolic effects or silos with fine ground solids can
cause strong multiple echoes. If the measures carried out in mode 1 - 09 … 11
are not sufficient, an additional reduction by
OFFSET can be carried out.
Reduction range (Offset range)
= 0.00 … 1.25
Practice values = 0.00 … 0.20
The reduction (offset) is carried out independent of
the function and starts with the end of the
measuring window.
Programming example:
Reduction and optimization of e.g. 0,20
Reduction ................................................................. • select mode 1 - 12 in MODEFIELD
• program reduction 0.12 (V) in PARAMETER
FIELD
• then store with STO-button
Optimization ............................................................. • select mode 1 - 13 in MODEFIELD
• activate optimization with MOD-button (the whole
parameter indication 0,12 flashes)
• optimize with Plus-button up to e.g. 0,20 (V)
(the optimization is operated in 0,01 V steps)
If during the optimization a modification to the oppo-
site direction is required, this can be made with the
minus button.
Real echo
Multiple false
echo