Voith WSR-D16212, Инструкция по эксплуатации

Страница: 16 / 25

Instruction Manual
Voith Turbo Way Valve WSR-D16212
2003 / 07 aie Voith Turbo GmbH & Co. KG Page: 16 / 24
918 3626 018870 en D – 74564 Crailsheim Version: 3.0
Potentiometer: Parameter description:
FM
Setting of hydraulic center of control piston
X0 Setting of position s at setpoint w = 4 mA
X1 Setting of position s at setpoint w = 20 mA
KP Setting of proportional gain of positioner
TD Setting of actual value difference of positioner
X0 must be adjusted before adjusting X1.
Potentiometers F0 and F1 are set at the factory and must not be adjusted.
For position of potentiometer, see Chapter 10.
6.2.1 Setting the hydraulic center of control piston
To avoid a deviation between the setpoint and the actual value remote indication, a
magnetic force offset is adjusted by potentiometer FM.
This offset is selected so that the control deviation is zero at setpoint w = 12 mA and the
control piston is in the hydraulic center. For setpoints of w ¹ 12 mA, minor deviations to
the actual value remote indication may occur.
•
Run the way valve until it has reached operating temperature and check the feed
pressure.
•
Predefine setpoint w = 12.00 mA with a power source.
•
Measure the actual value remote indication and set to 12 +/- 0.05 mA
with potentiometer FM.
Effective direction of FM:
The magnetic force or actual position remote indication increases by turning the
potentiometer clockwise.
Stroke setting
Fig. 3
Stroke setting
0
4 20
100
X1
mech. Anschlag
im Zylinder
mech. Anschlag
im Zylinder
Hubeinstellung
Sollwert
[
mA
]
Hub
[
%
]
X0