Flowserve PMV D3 User Instructions page 30

Close time
Open time
Deadband
Expert
Control
Togglestep
Self test
Leakage
Undo
P,I,D and K,Ti,Td parameters
If one of the gains is changed, the correspon-
ding value in the other gain set is changed
accordingly.
Min Pulse
The minimum pulse lengths (the "minpul-
ses") are displayed in the menu, and can be
changed.
Normal values are:
DN1, DN2: 2750 to 4300
UP1, UP2: 3750 to 5220
Reduction of pulses
This function monitors the number of pulses
vs time. In case of an excessive number
of pulses vs. time, an automatic reduction
of pulses is enabled in order to extend the
service life.
This function is enabled as default.
Minimum time (Min 0.005) from fully open to closed.
Minimum time (Min 0.05) from closed to fully open.
Setting deadband. Min. 0.2%.
Advanced settings.
See explanations below.
Test tool for checking functions. Overlays a square wave on the
set value.
Internal test of processor, potentiometer, etc.
Air leakage in actuator/tubing can be compensated by settings.
You can read last 20 changes.
PMV D3 Digital Positioner
FULL MENU
TUNING
Spring adjust
The spring adjust function compensates the
airflow linearly with the actuator C+ chamber
volume (for a constant position error), so that
low volumes get less flow. This is needed for
linear single-acting actuators, where a low
C+ volume means that the actuator spring is
extended, its force is reduced, and less flow
is needed for stable position changes.
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FCD PMENIM0001-06 A5 09/16