Introduction

For Level measurement there are lots of methods. Magnetostrictive Level Transmitter is one of the major methods that are used in industries that precision matters so much.This instrument is a two wire, loop powered smart transmitter, designed to measure and transmit an analog 4-20 mA signal and two digital outputs (optional) proportional to liquid level in a tank. In this session we will be discussing about Magnetostrictive Level Transmitter calibration

Working Principle of Magnetostrictive Level Transmitter

A low energy pulse generated by electronics travels through the length of magnetostrictive wire. When this signal encounters a magnetic float having a magnetic field a return signal is generated from the exact location where the float intersects the magnetostrictive wire. A timer measures the time of generation of electric pulse and the return signal. This time difference is used to calculate the level of the float

Calibration of magnetostrictive level transmitter

Magnetostrictive Level Transmitter calibration can be changed with the unit push buttons

Setting the 4mA point:

-Establish a tank level of 0% or move the float to the desired 0% point

-Enter the calibration mode by pressing the UP & DOWN buttons together for 1 second.

-Press the DOWN button for 1 second to set the output at 4.00mA.

Setting the 20mA point:

-Establish a tank level of 100% or move the float to the desired 100% point

-Enter the calibration mode by pressing the UP & DOWN buttons together for 1 second.

-Press the UP button for 1 second to set the output at 20.00 ma

 Note: The above steps can be repeated as many times as required

level measurement using Pressure gauge

calibration of capacitance type level transmitter