Partial Stroke - Fisher FIELDVUE DVC6200 Instruction Manual

Instruction Manual
D103409X012
SIS/Partial Stroke (Instrument Level ODV)
Field Communicator Configure / Setup > Detailed Setup > SIS/Partial Stroke (1‐2‐7)
Note
Partial Stroke is only available for instrument level ODV.
Follow the prompts on the Field Communicator display to configure the following partial stroke parameters: PST
Enable, and View/Edit PST Variables.
PST Enable—Yes or No. Enables or disables the Partial Stroke Test.
PST Vars View/Edit—Follow the prompts on the Field Communicator display to enter or view information for following
PST Variables: Max Travel Movement, Stroke Speed, Pause Time, PST Press Limit, PST Mode Enable, Pressure Set Point, and
End Pt Control Enable.
Max Travel Movement—The default value for Max Travel Movement is 10%. It may be set to a value between 1 and 30%
in 0.1% increments.
Note
The Max Travel Movement is the percentage of total span that the valve moves away from its operating state towards its fail state
during a Partial Stroke Test.
Stroke Speed—The stroke speed can be set for 1%/second, 0.5%/second, 0.25%/second, 0.12%/second, or
0.06%/second. The default value for Partial Stroke Speed is 0.25%/second.
Pause Time—The Setup Wizard sets the Partial Stroke Pause Time to 5 seconds. This is the pause time between the up
and down strokes of the test. It can be set for 5, 10, 15, 20 or 30 seconds.
PST Press Limit (single acting actuators)—During the Setup Wizard, or Auto Calibration, the Partial Stroke Pressure Limit
value will be set to a positive value. For single acting actuators that vent from the test starting point, the pressure limit
will be a minimum value. For those actuators that fill from the test starting point, the pressure limit will be a maximum
value. The pressure signal used for this threshold depends on relay type and is summarized below.
Relay Type
A or C
B
B Special App.
C Special App.
PST Press Limit (double-acting actuators)— During the Setup Wizard or Auto Calibration, the Partial Stroke Pressure Limit
value will be set to a negative value for actuators where the Partial Stroke Start Point is opposite of the Zero Power
Condition (e.g., Partial Stroke Start Point= Open and Zero Power Condition = Closed) and to a positive valve for
actuators where the Partial Stroke Start Point is the same as the Zero Power Condition.
Pressure Signal
Port A - Port B
Port B - Port A
Port B
Port A
Detailed Setup
May 2013
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