Emerson Fisher FIELDVUE DVC6000, Инструкция по эксплуатации

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DVC6000 Digital Valve Controllers
September 2013 5-10
9. Apply lubricant (key 63) to the pin portion of the
arm assembly (key 91).
10. Replace the mounting bracket on the back of the
instrument and reconnect the bias spring between the
feedback arm assembly and the arm assembly on the
travel sensor shaft.
11. Install the digital valve controller on the actuator.
Analog Input (1-3-2-3)
To calibrate the analog input sensor, connect a
variable current source to the instrument LOOP+ and
LOOP
−
terminals. The current source should be
capable of generating an output of 4 to 20 mA. From
the Configure menu select Calibrate, Sensor
Calibration, and Analog In. Follow the prompts on the
Field Communicator display to calibrate the analog
input sensor.
1. Set the current source to the target value shown on
the display. The target value is the Input Range Low
value. Press OK.
2. The following message appears:
Use Increase and
Decrease selections
until the displayed
current matches the
current source.
Press OK when you have read this message.
3. The value of the Analog Input appears on the
display.
4. From the adjustment menu, select the direction and
size of adjustment to the displayed value. Selecting
large, medium, and small adjustments causes
changes of approximately 0.4 mA, 0.04 mA, and 0.004
mA, respectively. Adjust the displayed value until it
matches the current source, select Done and go to
step 5.
5. Set the current source to the target value shown on
the display. The target value is the Input Range High
value. Press OK.
6. The following message appears:
Use Increase and
Decrease selections
until the displayed
current matches the
current source.
Press OK when you have read this message.
7. The value of the Analog Input appears on the
display.
8. From the adjustment menu, select the direction and
size of adjustment to the displayed value. Selecting
large, medium, and small adjustments causes
changes of approximately 0.4 mA, 0.04 mA, and 0.004
mA, respectively. Adjust the displayed value until it
matches the current source, select Done and go to
step 9.
9. Place the instrument In Service and verify that the
analog input displayed matches the current source.
Relay Adjust (1-3-3)
Before beginning travel calibration, check the relay
adjustment. To check relay adjustment, select Relay
from the Calibrate menu, then follow the prompts on
the Field Communicator display. Replace the digital
valve controller cover when finished.
Note
Relay B and C are not user-adjustable.
Double-Acting Relay
The double-acting relay is designated by “Relay A” on
a label affixed to the relay itself. For double-acting
actuators, the valve must be near mid-travel to
properly adjust the relay. The Field Communicator will
automatically position the valve when Relay is
selected.
Rotate the adjustment disc, shown in figure 5-5, until
the output pressure displayed on the Field
Communicator is between 50 and 70% of supply
pressure. This adjustment is very sensitive. Be sure to
allow the pressure reading to stabilize before making
another adjustment (stabilization may take up to 30
seconds or more for large actuators).
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