Flowserve PMV P3 - Manual (Page 15)

15
7. Adjustments
Gain
Default settings
The positioner is supplied from the
factory with default settings.
If the settings have been changed, the
default settings can be reset as follows:
• Apply an input signal equivalent to maxi-
mum stroke (100%).
• Screw in (clockwise) the setting screw A
for gain to its bottom position.
• Unscrew (counter clockwise) the same
screw until the actuator is at max. stroke and
then a further 1/4 of a turn.
• Press on the flapper nozzle lightly (see
arrow) to ensure that it is sealing properly.
• Adjust the input signal to approx. 50%. If
resonance occurs, turn the setting screw A
counter clockwise a little more. The
adjusting screw for damping B can also be
screwed in a little if necessary. However,
this will slow down the actuator movements.
Setting the zero position and span
If the zero position and span have been
changed, adjust them as follows:
• Apply an input signal equivalent to the zero
position.
• Turn the setting screw C for zero position
until the actuator is at its zero position.
• Apply the maximum input signal.
• Turn the adjusting screw D for range until
the actuator moves to max. stroke
• Adjust the input signal again to minimum
and check the zero position.
➞
C
D
A
B