What is DVC6200?

The DVC6200 digital valve controller is designed to directly replace standard pneumatic and electro‐pneumatic valve mounted positioners.

How does a pneumatic valve positioner work?

The pneumatic control valve positioner and its valve actuator are powered by an air supply. As the beam pivots, it shifts the flapper closer to or further from the nozzle, causing the pneumatic relay to increase or decrease the pressure on the valve actuator.

What is a Fisher DVC?

Fisher™ FIELDVUE™ is a single instrument solution that can meed your control valve reliability, performance and diagnostics needs across your facility. The instrument helps you save time and money. DVC Digital Valve Controller are all using the flapper-nozle technology for most accurate valve control.

How do I calibrate my DVC6200?

Steps to Calibrate a DVC6200 Controller

1. Hook up a HART® communicator to the DVC6200 in parallel with a 4-20 mA loop across the “loop” terminals.
2. Apply a 4 mA signal to the DVC and power up the HART communicator.
3. First, put the instrument in “not in service” mode.
4. Choose “not in service” and press enter.

How does a digital valve controller work?

In a typical digital valve controller, the control signal is read by the microprocessor, processed by a digital algorithm, and converted into a drive current signal to the I/P converter. The microprocessor performs the position control algorithm rather than a mechanical beam, cam, and flapper assembly.

What is the use of positioners?

Positioners help control valves respond faster to changes in the process variable, minimizing the amount of time the system is operating above or below the setpoint. Consistent valve position, even with varying pressures. Varying differential pressure across the valve can indicate instability in the control loop.

What does valve positioner do?

A valve Positioner is a device used to increase or decrease the air load pressure driving the actuator until the valve’s stem reaches a “POSITION” balanced to the output SIGNAL from the process variable instrument controller.

How does a digital positioner work?

A Digital Valve Positioner receives an electric signal (typically 4-20mA, HART, PROFIBUS, or Foundation Fieldbus) from a controller. It then sends a corresponding pneumatic signal to a pneumatic valve actuator.

What is PST instrumentation?

Partial stroke testing (or PST) is a technique used in a control system to allow the user to test a percentage of the possible failure modes of a shut down valve without the need to physically close the valve. PST is used to assist in determining that the safety function will operate on demand.

What is pneumatic positioner?

The Pneumatic Valve Positioner is an instrument working on force balance principle to position the Control Valve stem in accordance to a pneumatic signal received from a controller or manual loading station, regardless of packing box friction, actuator hysteresis or unbalanced forces on the valve plug.

What kind of valve controller does Fisher fieldvue use?

Fisher FIELDVUE DVC6200 Digital Valve Controller This manual applies to: Instrument Level AC, HC, AD, PD, ODV Device Type 03 Device Revision 2 Hardware Revision 1 Firmware Revision 9 DD Revision 3 6 Refer to Related Documents on page 3 for other documents containing information related to DVC6200 digital valve controllers

What do you need to know about Fisher dvc6200?

The Fisher FIELDVUE DVC6200 instrument allows for your operation to run closer to setpoint, improving product quality with more accurate control. Using FIELDVUE Performance Diagnostics, valve operation is monitored online to evaluate performance and reliability. Read more…

What is the fast key sequence on the dvc6200?

DVC6200 Digital Valve Controller ii Field Communicator Fast-Key Sequence and Menu Trees Instrument Level HC, AD, PD, and ODV Function/Variable Fast-Key Sequence Coordinates(1) Actuator Style 1-2-6-4 4-D Alert Conditions 2-1 2-E Alert Record Full Enable 1-2-3-6-2 8-F

Why is the dvc6200 a HART Communication Device?

The DVC6200 is a HART communicating device, so 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. The modular design allows critical working components to be replaced without removing field wiring or pneumatic tubing.