Burkert Type 8693 - Manual (Page 145)

145
Start-up and operation of the
position controller Type 8693
23.6.5. P.Q’LIN - linearization of the process characteristic
This function automatically linearizes the process characteristic of a flow control.
When the P.CONTROL function is activated, the P.Q’LIN functions required for process control are copied into the
main menu. This function starts the program which automatically determines the nodes for a correction characteristic.
→
Start the routine to linearise the process characteristic by selecting the P.Q’LIN menu option in the main menu
and press the selection key on the right (RUN) for approx. 3 seconds (countdown).
The program increases the valve stroke in 20 steps from 0 to 100 % and measures the associated process variable.
The value pairs of the correction characteristic are placed as a freely programmable characteristic under the
CHARACT
/ FREE menu option and can be viewed under this menu option.
If the
CHARACT menu option under the ADDFUNCTION menu option was not transferred into the main menu, the
transfer occurs automatically when the P.Q'LIN function is implemented. At the same time the CHARACT / FREE
menu option is activated.
displays on the panel during selection and implementation of the routine
...Display ....Description
Q.LIN #0
CMD=0%
Q.LIN #1
CMD=10%
:
Q.LIN #10
CMD=100%
Q.LIN
ready
or
Q.LIN
err/break
Display of the node which is just being started
(progress is indicated by a bar running along the upper edge of the display)
Display at the end of the routine
Display if an error occurs
Table 35: Display P.Q’LIN
english
Type 8692, 8693