Flowserve Logix MD+ ValveSight - Manual (Page 49)

ValveSight™ Diagnostics DTM Manual for Logix MD+ Positioner with HART®
FCD- LGENSF0014-00
© Flowserve Corporation
49
Position Range Small
•
Definition: During calibration, the range of motion of the position
feedback arm was too small for optimum performance.
•
Possible Solutions: Check for loose linkages and/or adjust the
feedback pin to a position closer to the follower arm pivot to create a
larger angle of rotation and recalibrate. The minimum angle of rotation
should be greater than 15 degrees. Briefly pressing the QUICK-
CAL/ACCEPT button acknowledges this condition and the positioner
will operate using the short stroke calibration if otherwise a good
calibration.
Position < ADC Range
•
Definition: During calibration, the feedback sensor moved beyond its
range of operation at the 0% (closed) position.
•
Possible Solutions: Adjust the positioner mounting, linkage or
feedback potentiometer to move the position sensor back into range
then restart the calibration.
Position > ADC Range
•
Definition: During calibration, the feedback sensor moved beyond its
range of operation at the 100% (open) position.
•
Possible Solutions: To correct the condition, adjust the positioner
mounting, linkage or feedback potentiometer to move the position
sensor back into range then restart the calibration.
No Motion Time Out
•
Definition: During a stroke calibration, there was no valve motion
detected. Because some valves are quite large, this indicator can take
up to 9 minutes to detect an error.