Fisher FIELDVUE DVC6200f Instruction Manual page 325

Instruction Manual
D103412X012
Travel Sensor Motion
Increasing or decreasing air pressure causes the
magnet assembly to move up or down or the
rotary shaft to turn clockwise or
counterclockwise. Device Setup asks if it can
move the valve to determine travel.
Tuning
The adjustment of control terms or parameter
values to produce a desired control effect.
Tuning Set
Preset values that identify gain and rate settings
for a FIELDVUE instrument. The tuning set and
supply pressure together determine an
instrument's response to input signal changes.
Watch Dog Timer
A timer that the microprocessor must pulse
periodically. If the microprocessor is unable to
pulse the timer, the instrument shuts down.
Zero Power Condition
The position of the valve (open or closed) when
the electrical segment power to the instrument is
removed. Zero Power Condition (ZPC) is
determined by relay and actuator action where:
for Relay A and C, Port A will be at atmosphere
pressure, and if double‐acting, Port B will be at
supply pressure. For Relay B, Port B will be at
supply pressure.
Glossary
July 2013
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