Maintenance
March 2006
10-3
Maintenance
The DVC6000f Series digital valve controller enclosure
is rated NEMA 4X and IP66, therefore periodic
cleaning of internal components is not required. If the
DVC6000f is installed in an area where the exterior
surfaces tend to get heavily coated or layered with
industrial or atmospheric contaminants, however, it is
recommended that the vent (key 52) be periodically
inspected to ensure it is fully open. If the vent appears
to be clogged, the vent can be removed, cleaned and
replaced. Lightly brush the exterior of the vent to
remove contaminant and run a mild water/detergent
solution through the vent to ensure it is fully open.
WARNING
Personal injury or property damage
can occur from cover failure due to
overpressure.
Ensure that the housing vent opening
is open and free of debris to prevent
pressure buildup under the cover.
WARNING
Avoid personal injury or property
damage from sudden release of
process pressure or bursting of parts.
Before performing any maintenance
procedures on the DVC6000f Series
digital valve controller:
Always wear protective clothing,
gloves, and eyewear to prevent
personal injury.
Disconnect any operating lines
providing air pressure, electric power,
or a control signal to the actuator. Be
sure the actuator cannot suddenly
open or close the valve.
Use bypass valves or completely
shut off the process to isolate the valve
from process pressure. Relieve process
pressure from both sides of the valve.
Vent the pneumatic actuator
loading pressure and relieve any
actuator spring precompression.
Use lock-out procedures to be sure
that the above measures stay in effect
while you work on the equipment.
Check with your process or safety
engineer for any additional measures
that must be taken to protect against
process media.
Note
If the feedback arm or feedback
arm assembly is removed from
the digital valve controller, the
travel sensor must be
recalibrated.
Because of the diagnostic capability of the DVC6000f
Series digital valve controllers, predictive maintenance
is available through the use of AMS ValveLink
Software. Using the digital valve controller, valve and
instrument maintenance can be enhanced, thus
avoiding unnecessary maintenance. For information
on using AMS ValveLink Software, refer to the AMS
ValveLink Software help.
Module Base Maintenance
WARNING
To avoid personal injury or property
damage caused by fire or explosion,
remove power to the instrument
before replacing the module base in
an area which contains a potentially
explosive atmosphere or has been
classified as hazardous.
The digital valve controller contains a module base
consisting of the I/P converter, printed wiring board
assembly, and pneumatic relay. The module base may
be easily replaced in the field without disconnecting
field wiring or tubing.
Tools Required
Table 10-1 lists the tools required for maintaining the
DVC6000f Series digital valve controller.
10
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