Emerson Fisher FIELDVUE DVC2000 Instruction Manual page 22

DVC2000 Digital Valve Controller
LINE UP WITH LOWER
EXTREME OF VALID
TRAVEL RANGE
2
W9219
Figure 2-11. Air-to-Close Fisher GX Magnet Array Alignment
D For air-to-open GX actuators vertically align the
magnet array so that the center line of the alignment
template is lined up as close as possible with the
upper extreme of the valid travel range on the
feedback array. See figure 2-10.
D For air-to-close GX actuators vertically align
the magnet array so that the center line of the
alignment template is lined up as close as possible
with the lower extreme of the valid travel range on the
feedback array. See figure 2-11.
5. Tighten the fasteners and remove the alignment
template. Continue on with the appropriate step 6
below.
For Air-to-Open GX Actuators
6. Remove the top plug (R1/8) from the back of the
DVC2000 housing. This pneumatic output port on the
DVC2000 lines up with the integral GX actuator
pneumatic port. See figure 2-12.
7. Install the plug (either G1/4 or 1/4NPT, included in
the mounting kit) to the external output pneumatic
port.
8. Remove the cover of the digital valve controller.
9. Using a 6 mm hex wrench, attach the digital valve
controller to the GX actuator mounting pad on the side
that has the open pneumatic port. Be sure to place the
O-ring between the digital valve controller's pneumatic
output and the actuator mounting pad. Pneumatic
tubing is not required because the air passages are
internal to the actuator.
2-8
ALIGNMENT
TEMPLATE
REMOVE THE
R1/8 PLUG
ADD THE
1/4NPT OR
G1/4 PLUG
W9019
Figure 2-12. Modifications for Fisher GX Actuator −
10. Check for clearance between the magnet
assembly and the DVC2000 feedback slot. The
magnet assembly should be positioned so that the
index mark in the feedback slot of the DVC2000
housing is between the valid range on the magnet
assembly throughout the range of travel. See figure
2-2.
11. Install a vent in the port on the upper diaphragm
casing's air supply connection on the actuator yoke
leg.
Air-to-Close GX Actuators
6. Remove the cover of the digital valve controller.
7. Using a 6 mm hex wrench, attach the digital valve
controller to the GX actuator mounting pad.
The O-ring and G1/4 or 1/4 NPT plugs
(supplied in the mounting kit) are not
used with this actuator construction.
8. Check for clearance between the magnet assembly
and the DVC2000 feedback slot. The magnet
assembly should be positioned so that the index mark
on the pole pieces (back of the positioner housing) is
between the valid range on the magnet assembly
throughout the range of travel. See figure 2-2.
9. Install tubing between the actuator casing and the
pneumatic positioner output connection that has the
arrow pointing away from the opening. See figure 2-7.
10. Install a vent in the port on the lower diaphragm
casing.
INSTALL THE O-RING BEFORE
ASSEMBLING TO THE GX ACTUATOR
M8 MOUNTING BOLTS
Air-to-Open Construction Only
Note
July 2009