Instruction Manual

Maintenance and Troubleshooting
September 2013
7-13
Figure 7-7. FIELDVUE DVC6020 SIS 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.
19. For both the DVC6020 SIS and the DVC6025,
perform the appropriate Travel Sensor Adjust
procedure in the Calibration section.
DVC6030 SIS Digital Valve Controller and
DVC6035 Remote Feedback Unit
Refer to figure 8-3 for DVC6030 SIS and 8-8 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 SIS 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.
Note
In the next step, be sure the feedback
arm outer surface remains flush with
the end of the travel sensor shaft.
7