# Search Results for: Pressure switch

## Direct level measuring techniques

Introduction There are several methods to measure the level.There are Direct and Indirect methods.example for Indirect methods areÂ Â Ultrasonic Level SwitchesÂ ,Interface Level MeasurementÂ ,Radiation level measurement techniques etc .in this session we are gonna discuss about some of the Direct level measuring techniques Simple Sight Glasses A visual indication of the level can be obtained when part …

## How to select a control valve Actuator ?

In this session we are gonna discuss about how to select a control valve actuators and we will briefly talk about it’s criteria What is a control valve actuator? The control valve regulates the rate of fluid flow as the position of the valve plug or disk is changed by force from the actuator. How …

## Distributed Control System (DCS) basics

Â Concept of Distributed Control System: DCSÂ refers to aÂ control system usually of a manufacturing system, process or any kind of dynamic system. In DCS controllers are not central in location, but which are distributed throughout the system with each component sub-system controlled by one or more controllers. The entire system is connected by a communication network …

## What are pneumatic controllersÂ ?

Â Introduction A controller is a device that senses differences between a desired condition and measured condition in a process. .The controller will reduce this difference with the help of final control elements in the process.If the final control element is control valve the controller will send signal to open or close the valve to reduce …

## PROGRAMMING LOGIC DEVICES (PLC)

Introduction A digitally operating electronic apparatus which uses a programming memory for the internal storage of instructions for implementing specific functions such as logic, sequencing, timing, counting and arithmetic to control through digital or analog modules, various types of machines or process.In this session we are gonna discuss about basics of programming logic devices (PLC) …

## Calibration of P/I converter.

Introduction Pressure to current (P/I) converters are  two-wire precision instrument designed to convert standard pneumatic input signals into proportional output electrical signal. They are compact robust instruments suitable for panel or field mounting applications.In this session we are going to discuss the calibration of P/I converter.  Input signal: 3-15 psig.  Output signal: 4-20 mA  DC …

## Displacer type level transmitter calibration / Leveltroll Calibration

Introduction Leveltroll is a combination of torque chamber, torque arm, torque tube, displacer and with this mechanism we can measure the level.A Leveltroll in and instrument used for measuring the liquid level between two known points. The Leveltroll works on the buoyancy principal. Leveltroll has a float, which submerses proportionately with liquid level raise in …

## Direct Acting Solenoid – How it works? Applications

What is Direct Acting ? Â  Direct acting means that valves uses a power supply to open and close. Power is transformed into magnetic force,in a plunger type valve,forces a plunger to move and open or close the valve seats. Other direct acting valve operate without a plunger but with same principle of direct power …

## Common Control Loops

Â  Common Control LoopÂ  1.Flow   Liquid flow processes are fast, Â typically 0.5 sec response or less. Gas flow is slightly slower because of the compressibility of the gas. Control components – transmitter, valve and transmission lines – Â are the main dynamic elements. Â The most common measuring means is the orifice plate and differential pressure …

## How to calibrate flow transmitter for Capillary type

Calibrate flow transmitter for Capillary type Material Data sheet Pressure calibrator (std) Multimeter (std) Hart communicator Step *Ask panel man to put the controller in manual mode for control loop and to put it on MOS for ESD loop. *Hook up HART Communicator and verify some parameters by refer to data sheet. Typical parameters are, …

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