Automatic Adjustment (X.tune) - Burkert 8750 Quick Start Manual

ENTER MENU
INPUT
EXIT
MENU
Fig. 15: Operating structure INPUT (select input signal)
You must exit the main menu by pressing the left selection
key before the modified data is saved to the
MENU EXIT
memory (EEPROM). During the save process, the save symbol
is indicated on the display.
28
SELEC MENU
4-20 mA
0-20 mA
0-10 V
0- 5 V
english
Typ 8750
Start-up24VDC
11.3 Automatic adjustment (X.TUNE)
WARNING!
Danger of injury due to the valve position changing when the
X.TUNE function is run at operating pressure.
▶ Never run X.TUNE while the process is running.
▶ Secure system against unintentional activation.
NOTE!
An incorrect control pressure or incorrectly connected oper-
ating pressure at the valve seat may cause the controller to
be wrongly adjusted.
▶ X.TUNE must always be run at the control pressure available
during subsequent operation (= pneumatic auxiliary energy).
▶ Run the X.TUNE function preferably without operating medium
pressure to exclude interference caused by flow forces.
The following functions are actuated automatically:
• Adjustment of the sensor signal to the (physical) stroke of the
actuating element used.
• Determination of parameters of the PWM signals to control the
control valves integrated in Type 8693.
• Setting the controller parameters of the process controller. Opti-
mization occurs according to the criteria of the shortest possible
correction time with simultaneous freedom from overshoot.
To stop X.TUNE, press the left or right selection key
STOP