107
Type 8692, 8693
english
Start-up, operation
process controller Type 8693
2.5.5 Linearisation of the process characteristic P.Q’LIN
This function automatically linearises the process characteristic of a flow control.
This function is only meaningful if a flow control is to be implemented.
The P.Q'LIN function can only be started if the menu option P.CONTROL / SETUP / PV-INPUT / frequency or
P.CONTROL / SETUP / PV-INPUT / 4-20 mA has been selected.
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
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