Process control is extensively used in industry and enables mass production of consistent products from continuously operated processes such as oil refining, paper manufacturing, chemicals, power plants and many others. Process control enables automation, by which a small staff of operating personnel can operate a complex process from a central control room.
In reality, the controller is just a partner. A process will respond to a controller’s commands only in the manner which it can. To understand process control you must understand the other partners as well: sensors, final control elements and the process itself. All of these determine what type of response the controller is capable of extracting out of the process.
It is not the other way around Process control is an engineering discipline that deals with architectures, mechanisms and algorithms for maintaining the output of Specific process within a desired range. For instance, the temperature of a chemical reactor may be controlled to maintain a consistent product output. Process control is extensively used in industry and enables mass production of consistent products from continuously operated processes such as oil refining, paper manufacturing, chemicals, power plants and many others. Process control enables automation, by which a small staff of operating personnel can operate a complex process from a central control room.
Components of Process Control
A controller seeks to maintain the measured process variable (PV) at set point (SP) in spite of unmeasured disturbances (D). The major components of a control system include a sensor, a controller and a final control element. To design and implement a controller, we must:
Have identified a process variable we seek to regulate, be able to measure it(or something directly related to it) with a sensor, and be able to transmit that measurement as an electrical signal back to our controller, and
Have a final control element (FCE) that can receive the controller output (CO) signal, react in some fashion to impact the process (e.g., a valve moves), and as a result cause the process variable to respond in a consistent and predictable fashion.
Local Visual Display Indication Entirely Corrosion Resistant PVDF Transducer Push Button Programming Narrow Beam Technology Small Deadband (maximizes filling capacity of the tank) Cost Effective General Purpose / XP Explosion Proof 2 Wire (4-20mA) + (HAR T) Output Signal Measuring Range / - 4”- 66 Ft Accuracy 0.2 % of set measuring range Temperature Compensated / -40 C -70 C / (-40 F -176 F) NPT / G / Flanged Connection Calibration without filling / discharging ULTRAPRO 500 SERIES ULTRASONIC TRANSMITTER (RELIABLE NON CONTACT CONTINUOUS LIQUID LEVEL) All Plastic Enclosure – NEMA 4X Entirely Corrosion Resistant PVDF Transducer Push Button Programming Narrow Beam Technology Small Deadband (maximizes filling capacity of the tank) Cost Effective General Purpose / XP Explosion Proof 2 Wire (4-20mA) + (HAR T) Output Signal Measuring Range - 4”- 66 Ft Accuracy 0.2 % of set measuring range Temperature Compensated -40 C -70 C / (-40 F -176 F) NPT / G / Flange Connection Point Level Calibration.
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