Data Sheet

DVC6200f Digital Valve Controller
D103399X012
Product Bulletin
62.1:DVC6200f
July 2013
2
Figure 1. Condition Indicators
RED CONDITION INDICATOR
SIGNIFIES ALERT IS ACTIVE
RED CONDITION
INDICATOR INDICATES
POSSIBLE CAUSE
HIGH SPEED TRIGGERED DATA-STORED INSIDE
THE DVC6200f DIGITAL VALVE CONTROLLER
PD INSIDE PROVIDES POSSIBLE CAUSES AND
RECOMMENDED CORRECTIVE ACTIONS
Valve Diagnostics
The DVC6200f digital valve controller provides a broad
and deep portfolio of valve diagnostic capabilities.
Whether the 475 Field Communicator is used to check
for valve alerts and operational status, or ValveLink
software is used for comprehensive diagnostic test and
analysis, the tools are easy to use. Because the F
OUNDATION
fieldbus system provides continuous digital
communication to field devices, the DVC6200f delivers
prompt notification of current or potential equipment
issues.
Performance Diagnostics enable condition and
performance monitoring of the entire valve assembly
(not just the digital valve controller) while the valve is
actively controlling the process. When conducting
Performance Diagnostics tests, the valve does NOT move
beyond the normal setpoint changes driven by the
process controller. The DVC6200f uses statistical
algorithms to determine condition and performance
related issues based on live readings from the many
on‐board sensors. Results are then displayed graphically,
with severity indicated. A detailed description of the
identified issue as well as suggestions for recommended
actions are provided, as shown in figure 1.
Examples of identifiable issues are:
n Low air supply or pressure droop
n Incorrect regulator setting
n Dirty air supply
n External air leak (actuator diaphragm or tubing)
n Calibration shift
n Valve stuck
n Piston actuator O‐ring failure
n Excessive valve assembly friction
n Excessive valve assembly deadband
n Elastomer failure in the DVC6200f
n Broken actuator spring
Performance Diagnostics also provide access to
full‐stroke dynamic testing of the valve assembly
including; valve signature, dynamic error band, step
response, and stroke check. These tests change the
instrument setpoint at a controlled rate and are
performed while the valve assembly is isolated from the
process.
For additional information on FIELDVUE diagnostics and
ValveLink software refer to Fisher bulletin 62.1:ValveLink
(D102227X012).