VEGA VEGAMET 515 - Manual (Page 45)

VEGAMET 515 45
Parameter adjustment
Tendency determination
The level change within the cycle time (ta) is determined and after all cycles (n) an average
value is generated out of the sum of the level changes. If this average value exceeds a previ-
ously defined % value, the tendency determination responds, i.e. an energised relay
deenergises. After the selection of "Tendency rising“ or "Tendency falling“, the menu items
"Deviation in %“ and "Deviation per time“ are activated.
– – Mode Tendency rising
The relay deenergises when the
rising average value of "t tot.“
exceeds the previously defined %
value.
Tendency falling
same dependence, however with
falling average value
– – Deviation in % 2 If the level change exceeds the % value set
here, the tendency determination responds.
0 … 110 %
Example 2 % (change) per t tot.
– – Deviation per time
– – Cycle time
in s 60 Adjustment range 0 … 999 s
Example 60 s correspond to 1 minute
– – Number of
cycles 4 Adjustment range 0 … 99 cycles
Example: t tot = ta • n = 60 • 4 = 240 s = 4 min,
i.e. after every 4 minutes, the average value of
the deviation is generated and the result is
compared with the given deviation in %, here in
the example = 2 %
d
t
%
4 n=4
t a
t ges.
3 2 1 b z
Relay output
ta = cycle time
n = number of cycles
d
t
%
4 n=4
t a
t ges.
3 2 1 b z
Relay output
ta = cycle time
n = number of cycles