Burkert 8692 Operating Instructions Manual page 112

Standardised valve stroke [%] (POS)
Figure 62: Characteristics
In the case of control tasks for closed-loop control systems it is usually particular demands which are placed on the
course of the operating characteristic, e.g. linearity. For this reason it is occasionally necessary to correct the course
of the operating characteristic in a suitable way. For this purpose the Type 8692/8693 features a transfer element
which implements different characteristics. These are used to correct the operating characteristic.
Equal percentage characteristics 1:25, 1:33, 1:50, 25:1, 33:1 and 50:1 and a linear characteristic can be set.
Furthermore, a characteristic can be freely programmed via nodes or automatically calibrated.
25.2.1.1. Inputting the freely programmable characteristic
The characteristic is defined via 21 nodes which are distributed uniformly via the position set-point values ranging
from 0 – 100 %. Their distance is 5 %. A freely selectable stroke (adjustment range 0 – 100 %) is assigned to each
node. The difference between the stroke values of two adjacent nodes must not be larger than 20 %.
FREE
* If the submenu is left by pressing the
Figure 63: Operating structure CHARACT FREE
112
GRAPH
SELEC
ESC
key, the value remains unchanged.
english
Position set-point value [%]
CMD
GRAPH
INPUT
y 0 ->: 0,0%
y 5 ->: 5,0%
y 100 ->: 100%
EXIT
Type 8692, 8693
Auxiliary functions
Enter
INPUT
value
OK
*