Understanding the Working Process of Fisher FIELDVUE DVC2000 Digital Valve Controller

No engineer is immune to curiosity about the principles of engineering, and many technical people are surely interested in the working principle of the Fisher FIELDVUE DVC2000 Digital Valve Controller.So today, let us have a look at the complete working principle of the Fisher DVC2000 digital valve controller.

In this blog, we will explain:

● Fisher DVC2000 Positioner Basic Working Principle.

●FIELDVUE DVC2000 Detailed Work Steps.

● Emerson Fisher DVC2000 Closed-Loop Control Process.

1. Receiving The 4-20mA Input Signal:

When the instrument is switched on and the work process is started, the control system sends a current signal to the Fisher DVC2000. The DVC2000 Fisher receives the signal via the terminal block and sends it to the main electronic components.

2. Digital Signal Processing Inside The Main Board:

When the microprocessor receives the input signal, it analyses the instruction signal and calculates.

3. I/P Converter: Converting Electrical Signal Into Pneumatic Pressure:

In the DVC 2000 two stage positioner design, the I/P converter serves as a preamplifier stage. As a current-to-pressure converter, the DVC2000 sends an electrical drive signal to the I/P converter, which then generates a proportional air pressure output.

4. Pneumatic Relay Amplifies The Signal:

The I/P converter puts out a quite modest pressure signal, hence a pneumatic relay must be employed to amplify the signal. The pneumatic relay is an effective stage for power amplification, efficient in air consumption and also improves the dynamic response.

5. Actuator Moves The Control Valve:

The relay sends air pressure to the actuator and it begins to move. The DVC2000 Digital Valve Controller continually controls the actuator movement until the required valve position is obtained.

6. Valve Position Feedback Creates A Closed-Loop System:

The Emerson Fisher DVC2000 provides feedback control by using a non-contact position feedback mechanism that constantly corrects for deviation depending on the actual valve stroke.

The Fisher DVC2000 features a unique design with two-stage positioning: an I/P converter and a Pneumatic Relay. Furthermore, a core advantage of the Fisher DVC2000 lies in its automatic setup and automatic calibration.

Fisher FIELDVUE DVC2000 is a digital valve controller. It is fed with a 4-20mA control signal and then the commands are processed by means of a microcontroller. An I/P converter transforms the electrical signal to pneumatic pressure and a pneumatic relay amplifies the pneumatic pressure. Finally, the valve actuator is controlled by a closed loop feedback system.

FAQ

Q1: How Does Fisher DVC2000 Valve Positioner Control A Valve?

A1: The Fisher DVC2000 converts an electrical input signal of 4-20mA to pneumatic pressure to move the actuator to operate a valve. It checks the valve position continually with feedback and adjusts the output to maintain the appropriate position.

Q2: What Is The Function Of The I/P Converter In Fisher DVC2000 Positioner?

A2: The I/P converter transforms the electrical drive signal from the DVC2000 electronics to a proportionate pneumatic pressure signal to control the valve actuator.

Q3: Why Does The Fisher DVC2000 4-20mA Valve Positioner Need Position Feedback?

A3: The controller compares the desired valve position to the actual valve position via position feedback. This closed loop control enhances precision and eliminates positioning errors.

Q4: Does The Fisher DVC2000 Smart Valve Positioner Support HART Communication?

A4: Yes. The Fisher DVC2000 has HART connection capabilities that enable engineers to configure, monitor and diagnose the valve controller remotely.

Q5: What Is The Difference Between The Fisher DVC2000 Intelligent Valve Positioner And A Pneumatic Valve Positioner?

A5: A typical pneumatic positioner uses mostly mechanical control techniques. The Fisher DVC2000 incorporates digital processing, electronic feedback, automatic calibration, and diagnostics to enhance performance.