Emerson Fisher FIELDVUE DVC6000, Инструкция по эксплуатации

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Maintenance and Troubleshooting
September 2013 7-13
10. While observing the resistance, tighten the screw
(key 80) to secure the feedback arm to the travel
sensor shaft. Be sure the resistance reading remains
at the calculated resistance determined in step 6,
$
100 ohms. Paint the screw to discourage tampering
with the connection.
11. Disconnect the multimeter from the travel sensor
connector.
12. Apply anti-seize (key 64) to the pin portion of the
arm assembly (key 91).
13. Position the mounting bracket over the back of the
digital valve controller. Push the feedback arm
assembly (key 84) toward the housing and engage
the pin of the arm assembly into the slot in the
feedback arm.
14. Install the mounting bracket (key 74).
15. Install the bias spring (key 82) as shown in
figure 7-7.
16. For the DVC6020 only, connect the travel sensor
connector to the PWB as described in Replacing the
Module Base.
17. Travel sensor replacement is complete. Install the
digital valve controller on the actuator.
Travel Sensor Adjustment with the Field
Communicator
The next two steps do not apply if you used a
multimeter to adjust the travel sensor. Perform these
steps only if you elected to adjust the travel sensor
using the Field Communicator.
18. For the DVC6020 only, connect the travel sensor
connector to the PWB as described in Replacing the
Module Base.
19. For both the DVC6020 and the DVC6025, perform
the appropriate Travel Sensor Adjust procedure in the
Calibration section.
DVC6030 Digital Valve Controller and
DVC6035 Remote Feedback Unit
Refer to figure 8-4 for DVC6030 and 8-9 for DVC6035
key number locations.
1. Apply lubricant (key 63) to the travel sensor
assembly threads.
2. Screw the travel sensor assembly (key 223) into
the housing until it is tight.
If assembling a DVC6030 digital valve controller, use
step 3a. If assembling a DVC6035 remote feedback
unit, use step 3b.
3. a. Connect the travel sensor connector to the PWB
as described in the Replacing the Module Base
procedure.
b. Connect the three travel sensor wires to the
terminals.
Note
For the DVC6035 feedback unit,
connect the potentiometer assembly
(key 223) wires to the terminals as
follows:
red
terminal 1
white terminal 2
black terminal 3
4. Loosely assemble the bias spring (key 78), screw
(key 80), plain washer (key 163), and nut (key 81) to
the feedback arm (key 79), if not already installed.
5. Attach the feedback arm (key 79) to the travel
sensor shaft.
Two methods are available for adjusting the travel
sensor. You can use a multimeter to measure the
potentiometer resistance, or if you have a Field
Communicator, you can use the procedure in the
Calibration section. To use the multimeter, perform
steps 6 through 14. To use the Field Communicator,
skip to step 15.
Travel Sensor Adjustment with a Multimeter
6. Align the feedback arm (key 79) to the housing
(key 1) by inserting the alignment pin (key 46) through
the hole marked “A” on the feedback arm. Fully
engage the alignment pin into the tapped hole in the
housing. Position the feedback arm so that the outer
surface is flush with the end of the travel sensor shaft.
7. Connect a multimeter set to a resistance range of
50,000 ohms. Measure the resistance between pins 1
and 3 of the travel sensor connector. Refer to figure
7-6 for pin location. The resistance should be between
40,000 and 50,000 ohms.
8. Multiply the result in step 7 by 0.042 to get a
calculated resistance. The calculated resistance
should be in the range of 1680 to 2100 ohms.
9. Re-range the multimeter to a resistance of 3000
ohms between pins 2 and 3 of the travel sensor
connector. Refer to figure 7-6 for pin location.
10. Adjust the travel sensor shaft to obtain the
calculated resistance determined in step 8,
$
100
ohms.
7