Instruction Manual
D103412X012
Detailed Setup—Transducer Block
July 2013
84
pressure or process fluid, isolate the valve from the process and equalize pressure on both sides of the valve or bleed off the
process fluid.
Travel Sensor Motion (TRAVEL_SEN_MOTION [42.3]) establishes the proper valve travel sensor (feedback)
rotation/movement. For quarter‐turn actuators determine rotation by viewing the rotation of the magnet assembly
from the back of the instrument.
Note
Travel Sensor Motion in this instance refers to the motion of the magnet assembly. Note that the magnet assembly may be
referred to as a magnetic array in user interface tools.
For instruments with relay A or C If increasing air pressure at output A causes the magnet assembly to move up, or the
actuator shaft to rotate counterclockwise, enter “Towards Top of Instrument/CCW.” If it causes the magnet assembly
to move down, or the actuator shaft to rotate clockwise, enter “Away From Top of Instrument/CW.” For instruments
with relay B.
For instruments with relay B If decreasing air pressure at output B causes the magnet assembly to move up, or the
actuator shaft to rotate counterclockwise, enter “Towards Top of Instrument/CCW.” If it causes the magnet assembly
to move down, or the actuator shaft to rotate clockwise, enter “Away From Top of Instrument/CW.”
Lever Style—Enter the lever style (LEVER_STYLE [85.10]) for rotary actuators as either Pivot Point or Rack and Pinion.
Lever Arm Length—Defines the lever arm length (MOMENT_ARM [85.11]) for rotary actuators.
Effective Area—Enter the actuator effective area (EFFECTIVE_AREA [85.2]) in in
2
, cm
2
, or mm
2
.
Air—Select Opens or Closes, indicating the effect of increasing air pressure (AIR [85.3]) on the valve travel.
Upper Bench Set—Enter the upper actuator operating pressure (UPPER_BENCH_SET [85.5]).
Lower Bench Set—Enter the lower actuator operating pressure (LOWER_BENCH SET [85.4]).
Nominal Supply Pressure—Enter the nominal instrument supply pressure (NOMINAL_SUPPLY PRESSURE [85.6]).
Spring Rate—Enter the actuator spring rate (SPRING_RATE [85.7]) in lbsin or Nm.
Reference
Trim Style 1—Enter the valve trim style (TRIM_STYLE_1 [84.9]).
Trim Style 2—Enter the valve trim style (TRIM_STYLE_2 [84.10]).
Stroking Time Open—Enter the time required to stroke the valve from closed to open (STROKING_TIME_OPEN
[85.8]).
Stroking Time Close—Enter the time required to stroke the valve from open to close (STROKING_TIME_CLOSE
[85.9]).
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