25
YT-3300/3301 series
6.3.2
Manual Mode (MANUAL)
Manual mode is used to maneuver valve stem manually. During “MANUAL”, the positioner
bypasses supply air to the actuator. The movement of the stroke does not affect the
positioner’s save data valves.
6.3.3
Parameter Mode (PARAM)
AUTO CAL optimizes most of the valve actuator control values. However, in some
instances, hunting or oscillation may occur when the valve actuator control values are not
optimized. Hunting or oscillation can be prevented by adjusting parameter values.
Once parameter values have been changed, the changed values are being affected as
soon as you save the value. To save the changes, please ensure to press “ENTER”
button. There is no need to go back to “RUN” mode after changes are being made to
observe the changes.
6.3.3.1 Dead-Zone
(dEAdZONE)
Dead-Zone indicates the percentage of error allowance. In case of high level of packing
friction, which may cause hunting, creating Dead-Zone can stable the valve operation.
⇨
<ENTER>
6 seconds
⇨
<DOWN>
⇨
<ENTER>
<UP>
⇨
<DOWN>
⇨
<ESC>
⇨
<ENTER>
6 seconds
⇨
<DOWN>
2 times
⇨
<ENTER>
⇨
<ENTER>
⇨
<UP>/<DOWN>
⇨
<ESC>
3 times
<ENTER>
