Yokogawa YVP20S - Manual (Page 94)

9-17
IM 21B04C50-01E
<Toc> <Ind> <9. CONFIGURATION SERVICES>
9.6 Configuration - Options
This is the setup page for other configuration settings including characterization, pressure
range and units, bumpless transfer, display language, and temperature units.
Figure 9.8 Configuration - Options
9.6.1 Characterization Frame
The positioner is supplied with a choice of characteristics that modify the characteristic built
into the plug and actuator. Choose a characteristic that works with the control valve’s
inherent characteristic to provide a desired overall installed characteristic. Avoid the
common mistake of choosing an Equal Percent characteristic in the positioner if the valve
has an Equal Percent characteristic built into the plug.
Possible choices are: linear, equal percent (50:1), equal percent (30:1), quick open, camflex
percentage or (custom) define.
● Linear
The valve position is proportional to the input to YVP positioner.
● Equal Percent (50)
Equal percentage with rangeability of 50 to 1. For equal increments of the input, the valve
position has equal percentage changes of current valve position.
● Equal Percent (30)
Equal percentage with rangeability of 30 to 1. For equal increments of the input, the valve
position has equal percentage changes of current valve position.
● Quick Opening
The quick opening characterization is the inverse to the Equal Percentage (50)
characterization curve.