Fisher FIELDVUEDVC6200f Instruction Manual page 76

DVC6200f Digital Valve Controller
Detailed Setup - Transducer Block
February 2017
1. Connect the DVC6200f to a system running ValveLink software.
2. Disable Partial Stroke Outgoing Pressure Limit by ensuring it is not selected as an evaluation criteria for PST
Abnormal.
3. Run a partial stroke test.
4. Select the Press/Time radio button on the partial stroke graph (refer to the example in figure 4‐8). If the actuator
pressure starts high and moves low, find the minimum actuator pressure (Pmin). If the actuator pressure starts low
and moves high, find the maximum actuator pressure (Pmax). Double­acting actuators will display differential
pressure. Use table 4‐11 to estimate the Outgoing Pressure Threshold.
5. Enable the previously disabled Outgoing Pressure Limit - calculate the value using table 4‐11.
Table 4‐11. Estimates for Outgoing Partial Stroke Pressure Limits
Actuator Style Relay Type
A or C
Spring and
Diaphragm
A or C
Single Acting Piston
Double Acting Piston
Figure 4‐8. Example Time Series Plot; Actuator Pressure
76
Zero Power Condition
Closed
Open
Closed
B
Open
Closed
Open
Closed
B
Open
Closed
A
Open
ACTUAL TRACE FROM TEST (TYPICAL)
MINIMUM PRESSURE
(Pmin)
PST Starting Point
Open
Closed
Open
Closed
Open
Closed
Open
Closed
Open
Closed
Open
Closed
Open
Closed
Open
Closed
Open
Closed
Open
Closed
OUTGOING PRESSURE LIMIT
TIME (SEC)
Instruction Manual
Partial Stroke Pressure Limit
Pmin - 0.25 * (Bench Set High - Bench Set Low)
Pmax + 0.25 * (Bench Set High - Bench Set Low)
Pmax + 0.25 * (Bench Set High - Bench Set Low)
Pmin - 0.25 * (Bench Set High - Bench Set Low)
Pmax + 0.25 * (Bench Set High - Bench Set Low)
Pmin - 0.25 * (Bench Set High - Bench Set Low)
Pmin - 0.25 * (Bench Set High - Bench Set Low)
Pmax + 0.25 * (Bench Set High - Bench Set Low)
0.5 * Pmin
Pmax + 0.5 * (Psupply - Pmax)
Pmax + 0.5 * (Psupply - Pmax)
0.5 * Pmin
Pmax + 0.5 * (Psupply - Pmax)
0.5 * Pmin
0.5 * Pmin
Pmax + 0.5 * (Psupply - Pmax)
Pmin - 0.5 * (Psupply + Pmin)
Pmax + 0.5 * (Psupply - Pmax)
Pmax + 0.5 * (Psupply - Pmax)
Pmin - 0.5 * (Psupply + Pmin)
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