What is a Process Variable?

A process variable is the physical and chemical  properties of a process that is being controlled. common examples of PV or process variable are the temperature of a room, pressure and flow of fluid passing through a pipe, level of water in a tank and more.   These parameters are subject to changes depending on the requirements of the process. Click ( The Process Control Loop ) to understand more about the process variable and how it is controlled in a process control.

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The Process Control Loop

Hi, its me again and I am about to tackle a very important framework in the field of Instrumentation. Assuming you already have read my post regarding what a process control is and what are the parameters involved in this process. We are now going to learn how these parameters are meet in a process control loop. A Process control loop is a system that is designed to maintain a process on its desired set point. Each step in the loop works together to manage the system. Once the set point is reached, the process control loop operates in four steps. First, it will measure the current condition […]

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What is Process Control?

First we need to understand what process control is and what are the important technical terms and parameters involve in this process. Process control is a statistics and engineering discipline that deals with architectures, mechanisms and algorithms for maintaining the output of a specific process within a desired range as per wikipedia. Wiki sited an example about heating up of a room temperature which is a process that has the specific, desired outcome to reach and maintain a temperature (e.g. 20°C) defined by you or a person inside the room and should be kept constant over time. You can always […]

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