Fisher FIELDVUE DVC6200 Instruction Manual page 74

Detailed Setup
May 2013
To set the partial stroke pressure limit manually for single acting actuators select min pressure. Select min diff press for
double acting actuators.
Note
In order to manually set the partial stroke pressure limit with the correct value, you must be able to run a valve signature test using
ValveLink software. It is then possible to set the partial stroke pressure limit with the Field Communicator, using the information
generated by the valve signature test.
To manually set the partial stroke pressure limit, disable the travel deviation alert by setting Travel Dev Alert Pt to
125%. Also disable "end point pressure control" and disable the partial stroke pressure limit by setting the values
shown in table 4‐9.
Table 4‐9. Values for Disabling Partial Stroke Pressure Limit
Actuator Type Relay Type
A or C
Single Acting
B
Double Acting A
Run the partial stroke test using the Field Communicator. Once the test is completed download the partial stroke test
results using ValveLink software.
Select the Press/Time radio button from the partial stroke valve signature graph. If actuator pressure starts high and
moves low, find the minimum actuator pressure, Pmin. Otherwise, find the maximum actuator pressure, Pmax. Use
table 4‐10 to estimate the partial stroke pressure limit.
The default value is 0.
For double acting valves, the differential pressure is used.
74
Zero Power Condition Partial Stroke Start Point
Closed
Open
Closed
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Closed
Open
Partial Stroke Pressure Limit (Disabled)
Open
Closed
Open
Closed
Open
Closed
Open
Closed
Open
Closed
Open
Closed
Instruction Manual
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