Emerson Fisher FIELDVUE DVC6000f, Instruction Manual

Page: 277 / 384

Maintenance and Troubleshooting
December 2009 7-11
Assembly
DVC6010f Digital Valve Controller and
DVC6015 Remote Feedback Unit
Refer to figure 8-2 for DVC6010f and 8-7 for DVC6015
key number locations.
1. Insert the travel sensor assembly (key 223) into the
housing (key 1). Secure the travel sensor assembly
with screw (key 72).
If assembling a DVC6010f digital valve controller, use
step 2a. If assembling a DVC6015 remote feedback
unit, use step 2b.
2. 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 DVC6015 feedback unit,
connect the potentiometer assembly
(key 223) wires to the terminals as
follows:
red
terminal 1
white terminal 2
black terminal 3.
3. 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.
4. 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 5 through 13. To use the Field Communicator,
skip to step 14.
Travel Sensor Adjustment with a Multimeter
5. 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
side of the housing. Position the feedback arm so that
the surface is flush with the end of the travel sensor
shaft.
6. 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.
7. Multiply the result in step 6 by 0.046 to get a
calculated resistance. The calculated resistance
should be in the range of 1840 to 2300 ohms.
8. 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.
9. Adjust the travel sensor shaft to obtain the
calculated resistance determined in step 7,
$
100
ohms.
Note
In the next step, be sure the feedback
arm 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 7,
$
100 ohms. Paint the screw to discourage tampering
with the connection.
11. Disconnect the multimeter from the travel sensor
connector.
12. For the DVC6010f, connect the travel sensor
connector to the PWB as described in Replacing the
Module Base.
13. 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.
14. For the DVC6010f, connect the travel sensor
connector to the PWB as described in Replacing the
Module Base.
15. For both the DVC6010f and the DVC6015,
perform the appropriate Travel Sensor Adjust
procedure in the Calibration section.
7