Flowserve 500+ Series Logix - Manual (Page 16)

User Instructions - Logix® 500+ Series Digital Positioners FCD LGENIM0105-10 11/13
flowserve.com 16
were exceeded and the arm must be adjusted away
from the positioner’s limits. Rotate the feedback shaft
so that the full free travel of the feedback shaft is in the
range of the actuator movement. Optionally, continue
to attempt the calibration. Each calibration attempt
adjusts the acceptable limits and it should pass
eventually.
CAUTION: Remember to remove the air supply before
re-adjusting take-off arm.

NOTE: If mounted properly, the follower arm should be
horizontal when the valve is at 50% stroke and should move
approximately ±30° from horizontal over the full stroke of the
valve.

NOTE: To virtually eliminate non-linearity, use the
Linearization feature on the Custom Characterization page of
the DTM.
Figure 10: Valtek Rotary Final Orientation