what is output bias in control valve positioner ?
what is output bias in control valve positioner ?
(OP)
after installing a new control valve positioner (fisher DVC6200) & while making auto travelling
it stopped at stage "adjusting output bias" and didn't continue auto travelling .
-what is meant by "output bias" & why it stopped ??
it stopped at stage "adjusting output bias" and didn't continue auto travelling .
-what is meant by "output bias" & why it stopped ??





RE: what is output bias in control valve positioner ?
If output refers to the positioner's pneumatic output, it could be a pressure offset needed to move off the zero % point (?).
The auto-travel section of the manual (below) lists some other errors that might warrant looking at for things to check, because I'm guessing that the auto-travel calibration did not complete because of this output bias error?
is anything moving at all during the test?
Linkage alignment issue?
inadequate air supply?
RE: what is output bias in control valve positioner ?
TTFN (ta ta for now)
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RE: what is output bias in control valve positioner ?
Gunnar Englund
www.gke.org
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