DVC6000 Digital Valve Controllers
September 2013
3-4
If after completing the Setup Wizard the valve seems
slightly unstable or unresponsive, you can improve
operation by selecting either Performance Tuner or
Stabilize/Optimize from the Guided Setup menu. For
additional information on using the Performance
Tuner, refer to Using the Performance Tuner in this
section. For additional information on stabilizing or
optimizing valve response, refer to Stabilize/Optimize
at the end of this section.
Using the Performance Tuner (1-1-2)
Note
Performance Tuner is not available for
instrument level AC or HC.
WARNING
During performance tuning the valve
may move, causing process fluid or
pressure to be released. To avoid
personal injury and property damage
caused by the release of process fluid
or pressure, isolate the valve from the
process and equalize pressure on
both sides of the valve or bleed off
the process fluid.
The Performance Tuner is used to optimize digital
valve controller tuning. It can be used with digital valve
controllers mounted on most sliding-stem and rotary
actuators, including Fisher and other manufacturers’
products. Moreover, because the Performance Tuner
can detect internal instabilities before they become
apparent in the travel response, it can generally
optimize tuning more effectively than manual tuning.
Typically, the Performance Tuner takes 3 to 5 minutes
to tune an instrument, although tuning instruments
mounted on larger actuators may take longer.
Access Performance Tuner by selecting Performance
Tuner from the Guided Setup menu. Follow the
prompts on the Field Communicator display to
optimize digital valve controller tuning.
Stabilizing/Optimizing
or (1-1-2)
Valve Response
Note
Stabilize/Optimize is only available
through the Guided Setup menu for
instrument level HC.
WARNING
During Stabilize/Optimize the valve
may move, causing process fluid or
pressure to be released. To avoid
personal injury and property damage
caused by the release of process fluid
or pressure, isolate the valve from the
process and equalize pressure on
both sides of the valve or bleed off
the process fluid.
If after completing setup and calibration the valve
seems slightly unstable or unresponsive, you can
improve operation by pressing the Hot Key and
selecting Stabilize/Optimize, or select
Stabilize/Optimize from the Guided Setup menu.
Stabilize/Optimize permits you to adjust valve
response by changing the digital valve controller
If the valve is unstable, select Decrease Response to
stabilize valve operation,. This selects the next lower
tuning set (e.g., F to E). If the valve response is
sluggish, select Increase Response to make the valve
more responsive. This selects the next higher tuning
set (e.g., F to G).
If after selecting Decrease Response or Increase
Response the valve travel overshoot is excessive
select Decrease Damping to select a damping value
that allows more overshoot. Select Increase Damping
to select a damping value that will decrease the
overshoot. When finished, select done.
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