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The self‐diagnostic capability of the DVC7K

Value

• Hardware Savings — When installed in an integrated

control system, significant hardware and installation cost

savings can be achieved. Valve accessories such as limit

switches and position transmitters can be eliminated due

to the integrated position transmitter and switch option.

Solenoid valves can also be eliminated with the On/Off

application mode capabilities

• Increased Uptime — The self‐diagnostic capability

of the DVC7K provides valve performance and health

evaluation without shutting down the process or pulling

the valve assembly from the line.

• Improved Maintenance Decisions — Digital

communication provides easy access to the condition

of the valve. Sound decisions can be made by analysis

of valve information through any HART communicating

asset management software

The DVC7K is a HART®communicating device

Ease of Use

• Enhanced Safety — The DVC7K is a HART®

communicating device; information can be accessed

anywhere along the loop. This flexibility can reduce

exposure to hazardous environments and make it easier

to evaluate valves in hard-to-reach locations.

• Local User Interface (LUI) — The full text display in

the local interface is easy to navigate due to the six

button LUI (Figure 2). Each unit can be configured to

display Arabic, Chinese, Czech, English, French, German,

Italian, Japanese, Korean, Polish, Portuguese, Russian or

Spanish. View the Travel vs. Travel Setpoint, Instrument

Mode and Valve Health instantly from the home screen.

• Valve Health — Identify the health status of the valve

assembly at a distance with the NE 107 LED indicator.

Quickly troubleshoot issues and identify recommended

actions with Advice at the Device. Additionally, use the

LUI to view primary variables like supply pressure and

input current.

• Faster Commissioning — HART communications allow

the user to quickly commission loops with a variety

of tools from a remote location or locally at the valve

assembly with the LUI.

• Flexible Connectivity — Emerson’s secure Bluetooth®

wireless technology implementation (future release)

enables ability to see health across multiple valves.

• Easy Maintenance — The DVC7K is modular in design.

Critical working components can be replaced without

removing field wiring or pneumatic tubing.

Emerson DVC7K-H Linkage‐Less Non‐Contact Position Feedback

Features

Reliability

• Linkage‐Less Non‐Contact Position Feedback — The

high performance, linkage-less feedback system, shown

in Figure 1. eliminates physical contact between the valve

stem and the instrument. There is no wearing of parts

so cycle life is maximized. Additionally, the elimination

of levers and linkages reduces the number of mounting

parts and mounting complexity. Instrument replacement

and maintenance is simplified because the feedback

parts stay connected to the actuator stem.

• Built to Survive — The DVC7K’s field-proven conformal

coated electronics resist the effects of vibration,

temperature and corrosive atmospheres per the

ISA.75.13 standard. A weather‐tight housing construction

protects the wiring terminal box and critical components

from harsh environmental conditions.

• Eliminate Solenoids  — DVC7Ks in the On/Off

Application Mode provide a more reliable solution over

traditional solenoid valves. They also provide diagnostic

alerts to support early identification of problems

Emerson FIELDVUE DVC7K digital valve controller

The FIELDVUE DVC7K digital valve controller is reliable

and intuitive, featuring diagnostics that are targeted for

your On/Off applications. It converts a 4-20 mA or 24 V DC

input signal into a pneumatic output signal that controls

the actuator on the valve. Perform setup and configuration

procedures, check the valve health, and get Advice at the

Device™ using the simple-to-use Local User Interface

(LUI). The interface can be configured to support multiple

languages with a few button pushes.

Performance

• Accurate and Responsive — The two‐stage instrument

design provides quick response. Additionally, the DVC7K

allows users to customize the performance of their valve,

with a configurable ramp open rate and ramp closed rate.

CT/VT modules with enhanced diagnostics

Conclusion

CT/VT modules with enhanced diagnostics, released on 23 October 2006 with firmware 5.2.

offer much higher security for internal CT/VT module error detection and prevent undesired operations of URs.

Every UR firmware released since version 5.2 supports CT/VT modules with enhanced diagnostics,

which greatly improves the security and reliability of the protection system.

To take advantage of this feature, a relay hardware and possibly firmware upgrade is required.

If the existing relay has a firmware version below 4.0. GE recommends purchasing a

UR Upgrade Kit that allows modernization of the obsolete relay hardware

while taking advantage of the relay modularity.

The UR Upgrade Kit contains a new CPU and CT/VT modules that can be

inserted in an existing relay case (case is fully backwards compatible).

If the relay currently has firmware version 4.0 to 5.0. the latest firmware

can be downloaded from the GE Multilin website, and Enhanced Diagnostic

CT/VT modules (8L, 8M, 8N, 8R, 8S, 8V) can be purchased from the GE Online Store.

Consult with your local GE representative if you have any questions on the upgrade process.

The CT/VT input modules with enhanced diagnostics

Internal CT secondary monitoring

The CT/VT input modules with enhanced diagnostics are monitoring internal CT circuitry integrity.

This is done to eliminate relay erroneous operation in case of CT secondary winding failure.

The secondary winding of CT is divided into two equal parts with a central tap in the middle.

CT current values from both halves of the CT secondary windings are run through

a differential amplifier to get a true current sample for the phasor calculations.

It also compares between each other by simply summing two samples together.

(Note that due to CT central tap, samples have different polarity.)

In case that values from different halves of the same CT accumulated over

one protection pass per adaptable per signal level do exceed the fixed error boundary,

failure is declared and protection is blocked.

CT secondary monitoring is performed at all four CT channels (A, B, C, and N) individually at each CT

bank.

GE CT/VT Modules with Enhanced Diagnostics INTRODUCTION

INTRODUCTION

The performance of a microprocessor-based relay is highly dependent

on the performance of the analog channels measurement of the relay,

as protection functions operate on these values.

The failure of an analog measurement channel, 

either due to a failure in the external measurement circuit,

or due to an internal failure inside a UR CT/VT module, 

can cause incorrect operation of protection functions.

The UR CT/VT modules with Enhanced Diagnostics (module types 8L, 8M, 8N, 8R, 8S, 8V)

can detect the failure of an analog channel measurement due to internal

failures of the CT/VT module, alarm for failure of the module,

and block tripping from any protection function associated with this module.

This feature is available when using firmware 5.20 or later within

the UR family and therefore field-proven since 2006.

The integrated firmware of the FB2000-Series Flow Computer

Interactive Display

Access locally while maintaining safety.

The backlit liquid crystal display provides a local operator direct access

to the device, without removing the front cover. The display provides

four infrared ‘buttons’ that allow you to securely sign in and then

interact with the flow computer in the hazardous environment without

compromising safety. Four LEDs on the display provide you alarms and

status information.

FBxWifi™

Easily connect through a secure wireless network.

FBxWifi enables you to connect your laptop or tablet to the flow

computer through a secure wireless connection. Once connected, you

can use FBxConnect configuration software to view process values, edit

configuration parameters, update set-points and collect logs stored in the

flow computer — all while never stepping foot in the hazardous area.

Integrated Firmware

Everything you need, already there.

The integrated firmware of the FB2000-Series Flow Computer

contains all the functionality you’re looking for. A full set of global

calculations including support for Orifice, Cone, Venturi, Nozzle &

Rosemount Conditioning plate DP meters as well as Turbine, Coriolis

and Auto Adjust linear meters are embedded in the unit. Simply

select the software you plan to use and audit without the need for

extra user programs and licenses.

Emerson FBxConnect Tool Guided workflow simplifies configuration


Multivariable Sensor

Superior technology, unparalleled precision.

Equipped with the latest Rosemount™ multivariable measurement sensor

(MVS) technology and engineered for optimal flow performance, the MVS

delivers unparalleled accuracy over a wide range of operating conditions.

Pressure inputs on the sensor are used to measure both differential (DP)

and static (absolute or gauge) pressure with an operating range up to

3600 psia and a five year stability.

FBxConnect Tool

Guided workflow simplifies configuration.

FBxConnext provides a guided configuration process that takes you

through a step-by-step process to fully configure your flow computer.

This wizard-driven approach simplifies configuration and ensures that you

only need to enter required data once. Whether it’s you or your newest

technician, you can be confident that it is done the right way.

Interactive Display

Access locally while maintaining safety.

The backlit liquid crystal display provides a local operator direct access

to the device, without removing the front cover. The display provides

four infrared ‘buttons’ that allow you to securely sign in and then

interact with the flow computer in the hazardous environment without

compromising safety. Four LEDs on the display provide you alarms and

status information.

Emerson Operate more effectively with simplified configuration and support

Limited Time and Resources?

Operate more effectively with simplified configuration and support.

Simplified configuration and support of devices make every aspect of your operation more

effective. The new family of flow computers offers a variety of features that reduce the time

required to configure devices, reduce the likelihood of configuration errors, and reduce the

amount of training required to be effective.

Concerned with Operator Safety?

Access data locally without compromising safety.

Maintaining a safe operation is your top priority, and yet technicians are typically required to

compromise hazardous area approvals to access flow computers. No longer. With FBxWifi or the

Local Interactive Display, the FB2000-Series Flow Computers can be accessed for data collection, set

point and configuration changes, easily without opening the enclosure – which makes your people,

equipment, and operation safer than ever.

Enhanced Metrology Platform Minimized measurement risk.

With an industry-leading global suite of metrology calculations –

validated by third parties – you can be confident that no matter where

you are you’ll find what you need. Add in enhanced fallback mode, global

compliance, and role-based security and you can be confident that

measurement risk has been minimized with all your calculations in the

base firmware and your audit risks are contained.

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