Instruction Manual

DVC6000 SIS
September 2013
7-12
DVC6020 SIS Digital Valve Controller and
DVC6025 Remote Feedback Unit
Refer to figure 8-2 for DVC6020 SIS and 8-7 for
DVC6025 key number locations.
1. Insert the travel sensor assembly (key 223) into the
housing. Secure the travel sensor assembly with
screw (key 72).
If assembling a DVC6020 SIS digital valve controller,
use step 2a. If assembling a DVC6025 remote
feedback unit, use step 2b.
2. a. Connect the travel sensor connector to the PWB
as described in Replacing the Module Base.
b. Connect the three travel sensor wires to the
terminals.
Note
For the DVC6025 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 screw (key 80), plain washer
(key 163), and nut (key 81) to the arm assembly
(key 91), if not already installed.
4. Attach the arm assembly (key 91) to the travel
sensor assembly (key 223) 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 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
within the range listed 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 SIS 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 SIS only, connect the travel
sensor connector to the PWB as described in
Replacing the Module Base.
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