Fisher FIELDVUEDVC6200f Instruction Manual page 335

Instruction Manual
D103412X012
Temperature Sensor
A device within the FIELDVUE instrument that
measures the instrument's internal temperature.
Test Start Point
The normal (not tripped) end of valve travel. The
valve must be at this end for a Partial Stroke test
to be initiated.
Travel
Movement of the valve stem or shaft which
changes the amount the valve is open or closed.
Travel Sensor
A device within the FIELDVUE instrument that
senses valve stem or shaft movement. The travel
sensor in the DVC6200f is the Hall Effect sensor
that measures the position of the magnet
assembly.
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.
DVC6200f Digital Valve Controller
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
February 2017
335