Emerson Fisher FIELDVUE DVC6000f Instruction Manual page 41

DVC6035
FEEDBACK ARM
MOVEMENT
E0989
49B7988 / Doc
ACTUATOR SHAFT MOVEMENT
STARTING POSITION OF THE TRAVEL
INDICATOR ASSEMBLY IF INCREASING
PRESSURE FROM OUTPUT A DRIVES
THE INDICATOR CLOCKWISE. THE
POTENTIOMETER SHAFT WILL ROTATE
COUNTERCLOCKWISE AS VIEWED
FROM THE BACK OF THE INSTRUMENT.
NOTE: DVC6035 TRAVEL COUNTS
(COUNTERCLOCKWISE) = 3100 $ 700
Figure 2-14. FIELDVUE DVC6035 Travel Indicator Installation
Note
Refer to DVC6005f Base Unit mounting
guidelines on page 2-14 when when
installing a DVC6035 remote feedback
unit.
Figure 2-7 shows an example of mounting on on a
quarter-turn actuator. Refer to figure 2-7 for parts
locations. Also, where a key number is referenced,
refer to figure 8-9. Refer to the following guidelines
when mounting on quarter-turn actuators:
Note
While the housing differs on the
DVC6035 and the DVC6030f, feedback
parts are the same.
1. Isolate the control valve from the process line
pressure and release pressure from both sides of the
valve body. Shut off all pressure lines to the pneumatic
actuator, releasing all pressure from the actuator. Use
December 2009
DVC6035
FEEDBACK ARM
MOVEMENT
ACTUATOR SHAFT MOVEMENT
STARTING POSITION OF THE TRAVEL
INDICATOR ASSEMBLY IF INCREASING
PRESSURE FROM OUTPUT A DRIVES THE
INDICATOR COUNTERCLOCKWISE. THE
POTENTIOMETER SHAFT WILL ROTATE
CLOCKWISE AS VIEWED FROM THE
BACK OF THE INSTRUMENT
NOTE: DVC6035 TRAVEL COUNTS
(CLOCKWISE) = 13400 $ 700
lock-out procedures to be sure that the above
measures stay in effect while working on the
equipment.
2. If necessary, remove the existing hub from the
actuator shaft.
3. If a positioner plate is required, attach the
positioner plate to the actuator as described in the
mounting kit instructions.
4. If required, attach the spacer to the actuator shaft.
Refer to figure 2-14. The travel indicator assembly can
have a starting position of 7:30 or 10:30. Determine
the desired starting position then proceed with the next
step. Considering the top of the remote travel sensor
as the 12 o'clock position, in the next step attach the
travel indicator, so that the pin is positioned as follows:
D If increasing pressure from the digital valve
controller output A rotates the digital valve
controllers potentiometer shaft counterclockwise
(as viewed from the back of the instrument), mount
the travel indicator assembly such that the arrow is in
the 7:30 position, as shown in figures 2-10 and 2-14.
D If increasing pressure from the digital valve
controller output A rotates the digital valve
controllers potentiometer shaft clockwise (as
viewed from the back of the instrument), mount the
travel indicator assembly such that the arrow is in the
10:30 position, as shown in figures 2-9 and 2-14.
Note
ValveLink software and the Field
Communicator use the convention of
clockwise (figure 2-9) and
counterclockwise (figure 2-10) when
viewing the potentiometer shaft from
the back of the FIELDVUE instrument.
5. Attach the travel indicator, to the shaft connector or
spacer as described in the mounting kit instructions.
6. Attach the mounting bracket to the digital valve
controller.
7. Position the digital valve controller so that the pin
on the travel indicator, engages the slot in the
feedback arm and that the bias spring loads the pin as
shown in figure 2-11. Attach the digital valve controller
to the actuator or positioner plate.
8. If a travel indicator scale is included in the
mounting kit, attach the scale as described in the
mounting kit instructions.
Installation
2-17
2