Replacing The Pneumatic Relay - Emerson Fisher FIELDVUE DVC2000 Instruction Manual

DVC2000 Digital Valve Controller
TERMINAL
BARRIER
6
W8844
Figure 6-3. Installation of Conductive Gasket
Note
After I/P converter replacement,
calibrate the digital valve controller to
maintain accuracy specifications.
Removal
1. Remove the main cover.
2. Remove three screws that hold the EMI shield and
remove the shield (refer to figure 6-1).
3. Remove the three screws holding the electronics
board to the mounting frame.
4. Pull the main electronics straight off of the
mounting frame. The board is electrically connected to
an interconnecting board with a rigid connector.
5. Remove the two screws holding the mounting
frame to the instrument housing (refer to figure 6-2 for
location of screws).
6. Pull the manifold assembly straight out. The
interconnecting board is electrically connected to the
termination board with a rigid connector.
7. Remove the interconnect board from the mounting
frame.
6-6
8. Remove the four screws holding the I/P converter
to the mounting frame (refer to figure 6-2 for location
of screws).
9. Pull the I/P converter straight out taking care to
capture the two o-rings (one has a screen).
CONDUCTIVE
GASKET
Assembly
When installing a new I/P converter, follow the reverse
procedure as outlined above and recalibrate the
instrument.
1. Install the I/P converter, making sure the screen
O-ring is installed on the I/P supply port (the circular
port on the mounting frame), and that the two manifold
O-rings are in place.
2. Install the interconnect board on the mounting
frame. Do not tighten the self-tapping screw on on the
interconnect board (key 42) at this time.
3. Replace the manifold assembly.
4. Install the mounting frame to the housing, making
sure that the o-rings (keys 45 and 51) are in place.
5. Install the main electronics to the mounting frame,
making sure that the pressure sensor seal (key 16) is
in place.
6. Tighten the self-tapping screw (key 42) on the
Interconnect Board.
7. Install the primary shield (key 37) with three
screws.
8. Recalibrate the instrument and install the cover.

Replacing the Pneumatic Relay

The pneumatic relay is fastened to the mounting
frame. There are two versions, 0 to 3.4 bar (0 to 49
psig), indicated by a white label, and 3.5 to 7 bar (50
to 100 psig), indicated by a green label.
After pneumatic relay replacement,
calibrate the digital valve controller to
maintain accuracy specifications.
Removal
1. Remove the main cover.
2. Remove three screws that hold the EMI shield and
remove the shield (refer to figure 6-1).
3. Remove the three screws holding the electronics
board to the mounting frame.
Note
July 2009