Smart Positioner
YT-2500 / 2550 / 2501 Series
Product manual
Ver. 1.04
38
8.5
Manual Mode (MANUAL)
Manual mode is used to maneuver valve stem manually. In Manual mode, the positioner
does not control the valve by the signal received from outside, but it could be controlled to
move up and down by pressing <UP> and <DOWN> button.
<ENTER>
3 seconds
<ENTER>
<UP>/<DOWN>
Press <UP> or
<DOWN> button
if the above is not
displayed.
<ESC>
<ESC>
8.6
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.
8.6.1
Dead-Zone (dEAdZONE)
Dead-Zone indicates the percentage of error allowance. In case of high level of packing
friction, which may cause hunting, increasing the value of Dead-Zone can stable the valve
operation.
<ENTER>
3 seconds
<ENTER>
<ENTER>
Press <UP> or
<DOWN> button
if the above is not
displayed.
Press <UP> or
<DOWN> button
if the above is not
displayed.
<UP>/<DOWN>
<ENTER>
<ESC>
3 times
