Management of Change Guide: Replacing Fisher FIELDVUE DVC6000 Instruments with DVC6200 and DVC6200f Instruments
Table of contents
Loading...Fisher Management of Change Guide: Replacing Fisher FIELDVUE DVC6000 Instruments with DVC6200 and DVC6200f Instruments Manuals & Guides
Management of Change Guide
December 2019 / D351904X012
Fisher™ FIELDVUE™ DVC6200 and DVC6200f
Digital Valve Controllers
Table of Contents
Management of Change ..................................2
Background ....................................................2
Question & Answer Checklist ..........................2
Comparison of DVC6000 and DVC6200
Instruments ...................................................4
DVC6000 to DVC6200 Instrument Transition
Design Comparison .........................................7
Electrical ............................................................................. 7
Position Control Capabilities ............................................... 8
Diagnostic Capabilities ....................................................... 9
Operating Ambient Temperature Limits .............................. 9
Steady-State Air Consumption ............................................ 9
Maximum Output Capacity ................................................. 9
Connections ....................................................................... 9
Available Congurations .................................................... 10
Conclusion .....................................................10
Additional Resources .....................................11
MOC: DVC6200 and DVC6200f Digital Valve Controllers
Management of Change
Management of Change (MOC) is a procedure used to proactively manage changes
that have the potential to impact safety or the process within a plant. Evaluating
new techniques for improving MOC approval procedures can have an impact on
plant efciency. Historically, upgrading obsolete products or replacing existing
process control equipment had been delayed or abandoned due to the extensive
paperwork involved in completing a complex MOC approval sheet.
Background
The Fisher FIELDVUE DVC6000 series of digital valve controllers have proven to be
the most reliable digital valve controllers produced. Today, the introduction of the
DVC6200 and DVC6200f marks a step change in the technology, which will further
improve the reliability of these instruments in the harshest environments. This step
change in technology was made possible by utilizing the proven modular technology
of the one million and counting existing DVC6000 units in the eld today.
December 2019 / D351904X012
The design philosophy of the DVC6200 and DVC6200f allows the user the exibility
to transition from legacy FIELDVUE products to the current DVC6200, avoiding
lengthy management of change approval documents. This document will highlight
the design of the DVC6200 and DVC6200f, which incorporates linkage-less, non-
contact feedback technology into an intrinsically safe and explosion-proof package.
This feedback technology has been eld-proven in the DVC2000 since 2004 in high
vibration and corrosive environments. Over 73,000 FIELDVUE DVC2000 instruments
have been installed with no failures of this feedback technology.
Displayed in the following sections are design comparisons between the current
DVC6200 and legacy DVC6000 products. These comparisons demonstrate how
the design of Fisher technologies allows users to efciently transition to new, more
reliable FIELDVUE products.
Question & Answer Checklist
Q: Does the proposed modication cause any changes to the piping and
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instrumentation diagram (P&ID)?
A: Only the instrument name changes from DVC6000 to DVC6200.
Q: Does the proposed modication change process chemistry,
technology, or operating and control philosophies?
A: No.
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Q: Have the operating and design limits of the proposed modication
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changed?
A: No.
Q: Have the codes and standards to which the new equipment has been
designed changed?
A: No.
Q: Does the proposed modication change the Hazardous Electrical Area
classication?
A: No.
Q: Does the proposed modication change existing or create new
demands for battery back-up or other power supply redundancy or
reliability?
A: No.
MOC: DVC6200 and DVC6200f Digital Valve Controllers
December 2019 / D351904X012
Q: Does the proposed modication introduce new equipment that needs
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to be operated and, has a new operations list been stated?
A: Yes. The DVC6200 and DVC6200f are operated the same as the
DVC6000 and DVC600f.
Q: Does the proposed modication introduce new equipment items
that require spare parts, training manuals, maintenance procedures
or training to teach the maintenance department how to maintain
them?
A: Yes. The standard components that maintenance may be required
on are the same between the old and new equipment, except for
the differing feedback technology. The mounting methodology also
varies between the old and new technology.
Q: Does the proposed modication change the spares for existing pieces
of equipment?
A: No.
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MOC: DVC6200 and DVC6200f Digital Valve Controllers
Q: Does the proposed modication introduce new equipment items that
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require periodic predictive maintenance?
A: No. The new equipment items that may require periodic maintenance
are the same as the old equipment items, except for the position
feedback element. The new position feedback element (magnet /
hall effect sensor) requires no maintenance where the old feedback
element was a potentiometer that required periodic evaluation to
conrm no mechanical issues were present.
Comparison of DVC6000 and DVC6200 Instruments
The DV6200 with HART® communication uses the same internal components,
electronics and covers as the DVC6000. This is detailed below in Table 1. The
DVC6000 uses a potentiometer to obtain position feedback, whereas the DVC6200
position feedback utilizes a Hall effect sensor and magnetic array. This is the same
technology as used in the DVC2000. The DVC2000 was the rst Fisher instrument
released by Emerson that used a Hall effect sensor and a magnet array to measure
valve travel. The Hall effect sensor is located in the DVC6200 housing between
two “pole pieces” that are used to sense the magnet ux eld of a magnetic array.
The magnet array is mounted to the valve stem. As the valve stem moves, the
magnet array also moves (relative to the sensor). The magnet array is composed of
a series of magnets of different strengths, so the sensor can measure the changing
magnetic eld. Since there are no touching parts, this feedback is completely non-
contact and does not rely on linkages.
December 2019 / D351904X012
DVC6000 or DVC6000f Component DVC6200 and DVC6000 DVC6200f and DVC6000f
I/P
Relay
Printed Wiring Board
Ter m Box
Cover
Mod Base
Back Housing
Mounting
Position Feedback
Firmware
Table 1. FIELDVUE DVC6000 and DVC6200 Instrument Component Comparison
No change No change
No change No change
No change New
No change No change
No change No change
No change No change
New New
New New
DVC2000 Technology DVC2000 Technology
No change New
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