PMV P-1500 - Page 5

P-1500/P-1700-manual from PMV 14321-99.6
– 5 –
The PMV Rotary Positioner
1. To zero the positioner
The zeroing screw is
accessible from the outside.
Back off the screw and move
the cover to one side. Fig 1
Adjust by means of a
screwdriver. The adjusting
screw is provided with a
friction brake and need not
therefore be locked after
adjustment. Fig 2
Air preparation
The PMV Rotary Positioner can work with supply
pressure up to 10 bar (150 psi). In order to obtain
satisfactory operation and high reliability, the
positioner should be fed with dry, clean oil free
air.
By connecting the air supply to the positioner via
a filter 25 microns which is placed as close to the
positioner as possible, the required air quality is
received.
For large pressure variations of the supply air, a
pressure regulator should be mounted between
filter and positioner in order to eliminate the
fluctuations.
Installation
The supply air shall be connected to the port S.
The control pressure shall be connected to port I
while ports C1 and C2 are connected to the
connections of the cylinder.
2. To adjust the Control
Pressure Range
2.1 General
The top end of the spring is
provided with an adjusting
nut.The effective length
of the spnng can be varied by
turning the spring relative to
the nut . For any fixed control
range the actuator will move
more if the effective length of
the spring is increased. Fig 3
A. Long travel
B. Short travel
After the spring length has
been adjusted, the spring
guide must be turned in
relation to the nut so that its
underside is not in contact
with the end of the spring.
Fig 4
A. Incorrect
B. Correct
Figure 1
Figure 2
Figure 3
Figure 4
A B
A B