Emerson Fisher FIELDVUE DVC6000f, Instruction Manual

Page: 279 / 384

Maintenance and Troubleshooting
December 2009 7-13
potentiometer resistance, or if you have a Field
Communicator, you can use the procedure in the
Calibration section. To use the multimeter, perform
steps 5 through 17. To use the Field Communicator,
skip to step 18.
Travel Sensor Adjustment with a Multimeter
5. 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.
6. Multiply the result in step 5 by 0.142 to get a
calculated resistance. The calculated resistance
should be in the range of 5680 to 7100 ohms.
7. Re-range the multimeter to a resistance of 7000
ohms between pins 2 and 3 of the travel sensor
connector. Refer to figure 7-6 for pin location.
8. Hold the arm assembly (key 91) in a fixed position
so that the arm is parallel to the housing back plane
and pointing toward the terminal box. Position the arm
assembly so that the outer surface is flush with the
end of the travel sensor shaft.
9. Adjust the travel sensor shaft to obtain the
calculated resistance determined in step 6,
$
100
ohms.
Note
In the next step, be sure the arm
assembly outer surface remains flush
with the end of the travel sensor shaft.
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 or equivalent) 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).
Figure 7-7. FIELDVUE DVC6020f Digital Valve Controller, Bias
Spring (key 82) Installation
BIAS SPRING
(KEY 82)
ARM ASSEMBLY
(KEY 91)
FEEDBACK
ARM
ASSEMBLY
(KEY 84)
NOTE:
INSTALL BIAS SPRING WITH SMALLER DIAMETER HOOK
CONNECTED TO ARM ASSEMBLY (KEY 91) AND WITH BOTH HOOK
OPENINGS TOWARD CENTER OF BRACKET.
15. Install the bias spring (key 82) as shown in
figure 7-7.
16. For the DVC6020f 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 DVC6020f only, connect the travel sensor
connector to the PWB as described in Replacing the
Module Base.
19. For both the DVC6020f and the DVC6025,
perform the appropriate Travel Sensor Adjust
procedure in the Calibration section.
DVC6030f Digital Valve Controller and
DVC6035 Remote Feedback Unit
Refer to figure 8-4 for DVC6030f 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 DVC6030f digital valve controller, use
step 3a. If assembling a DVC6035 remote feedback
unit, use step 3b.
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