Fisher FIELDVUE DVC6200 Instruction Manual page 60

DVC6200 Digital Valve Controller
Actuator Style Relay Type
Spring and
Diaphragm
4
Single Acting Piston
Double Acting
Piston
52
Table 4-10. Estimates for Partial Stroke Pressure Limits
Zero Power
Condition
Closed
A or C
Open
Closed
B
Open
Closed
A or C
Open
Closed
B
Open
Closed
A
Open
PST Starting Point
Pmin − 0.25 * (Bench Set High − Bench Set Low)
Open
Pmax + 0.25 * (Bench Set High − Bench Set Low)
Closed
Pmax + 0.25 * (Bench Set High − Bench Set Low)
Open
Pmin − 0.25 * (Bench Set High − Bench Set Low)
Closed
Pmax + 0.25 * (Bench Set High − Bench Set Low)
Open
Pmin − 0.25 * (Bench Set High − Bench Set Low)
Closed
Pmin − 0.25 * (Bench Set High − Bench Set Low)
Open
Pmax + 0.25 * (Bench Set High − Bench Set Low)
Closed
Open 0.5 * Pmin
Pmax + 0.5 * (Psupply − Pmax)
Closed
Pmax + 0.5 * (Psupply − Pmax)
Open
Closed 0.5 * Pmin
Pmax + 0.5 * (Psupply − Pmax)
Open
Closed 0.5 * Pmin
Open 0.5 * Pmin
Pmax + 0.5 * (Psupply − Pmax)
Closed
Pmin − 0.5 * (Psupply + Pmin)
Open
Pmax + 0.5 * (Psupply − Pmax)
Closed
Pmax + 0.5 * (Psupply − Pmax)
Open
Pmin − 0.5 * (Psupply + Pmin)
Closed
(1)
Partial Stroke Pressure Limit
September 2010