Replacing The Main Electronics; Replacing The Secondary Electronics - Emerson Fisher FIELDVUE DVC2000 Instruction Manual

DVC2000 Digital Valve Controller
When replacing components, proper
means of electrostatic discharge
protection is required. Failure to use a
grounding strap, or other means of
electrostatic discharge protection can
result in damage to the electronics.

Replacing the Main Electronics

The main electronics contains the liquid crystal
display, pushbuttons, and microprocessor with
firmware. Calibration and configuration data is stored
on the main electronics board.
6
Note
After replacing the main electronics
board, recalibrate and configure 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 (refer to figure 6-1).
4. Pull the main electronics straight off of the
mounting frame. The board is electrically connected to
an interconnecting board with a rigid connector.
Installation
When installing a new board, follow the reverse
procedure as outlined above and recalibrate the
instrument. Take care to align the rigid connector
properly, and install the pressure sensor O-ring before
installing the three fasteners.
6-4
CAUTION

Replacing the Secondary Electronics

The secondary electronics contains the wiring
terminations and the feedback sensor circuitry.
Additionally, any optional electronics (limit switches
and position transmitter) reside on the secondary
electronics.
Note
After secondary electronics
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 (refer to figure 6-1).
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).
6. Pull the mounting frame straight out. The
interconnecting board is electrically connected to the
termination board with a rigid connector.
7. Remove the small board from the I/P converter
pins.
8. Remove the interconnect board from the mounting
frame.
9. Remove the three screws holding the terminal
board to the housing (refer to figure 6-1).
10. Pull the terminal board straight out of the
housing.
July 2009