Emerson Fisher FIELDVUE DVC6000, Инструкция по эксплуатации

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DVC6000 Digital Valve Controllers
September 2013 7-10
7. Remove the screw (key 72) that fastens the travel
sensor assembly to the housing.
8. Pull the travel sensor assembly (key 223) straight
out of the housing.
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. Remove piping and fittings from the instrument.
2. Remove the digital valve controller from the
actuator. Loosen the screw (key 80) that secures the
feedback arm (key 79) to the travel sensor shaft.
Remove the feedback arm from the travel sensor
shaft.
If disassembling a DVC6030 digital valve controller
use step 3a. If disassembling a DVC6035 remote
feedback unit use step 3b.
3. a. Separate the module base from the housing by
performing the Removing the Module Base procedure.
b. Disconnect the three potentiometer assembly
wires from the terminals.
4. From within the housing, unscrew the travel sensor
assembly (key 223) from the housing.
Assembly
Note
If the feedback arm (key 79) or
feedback arm assembly (key 84) is
removed from the digital valve
controller, the travel sensor (key 77)
must be recalibrated.
DVC6010 Digital Valve Controller and
DVC6015 Remote Feedback Unit
Refer to figure 8-2 for DVC6010 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 DVC6010 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.
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