The first moving coil galvanometer was invented in 1820 by Danish physicist Hans Christian Oersted as an improved version of the astatic galvanometer he had created a few years earlier. Since then, the design has been modified and improved to become smaller, more accurate, and more sensitive. The instrument is still widely used today in laboratories and factories all over the world for all types of electrical measurements. This article discusses an … [Read more...]
What is PMMC Instrument : Construction, Working & Its Uses
There are various kinds of electrical panels and instruments which are mounted on board that allows sailing of ship easily between two ports in a more efficient and easy manner. This requires arranged maintenance and assessments to stay away from any kind of breakdown at the time of sailing. So, for onboarding purposes, there exist various devices and to measure multiple electrical factors. One of the instruments is the PMMC instrument (Permanent Magnet … [Read more...]
What is Flux Meter : Construction, Working & Its Uses
In the field of physics, particularly in electromagnetism, the concept of magnetic flux across the surface is defined as the surface integral of the general factor of the magnetic field which is represented with ФB. In order to measure the magnetic flux, there has to be a device, and it is the flux meter. Even though the development of flux meters started many years back, the usage of these devices started a few decades back. Now, with the advancement, … [Read more...]
What is Eddy Current Dynamometer : Working & Its Applications
Initially in the period 1931, the eddy current dynamometers were invented by Martin and Anthony Winther. From the year 2002, these dynamometers are manufactured with a license under Dynamatic and Eaton production line. But these instruments were not so popular because DC generators and motors were more in popularity and implementation. Being so suitable for modern-day frameworks, these devices are implemented in sophisticated applications too. Basically, a … [Read more...]
What is a Megger Test? Working Principle, Types and Applications
The name Megaohm meter is classified further into the name Megger. This test is useful for the testing of internal cable resistance. This is one of the famous methods used for the testing of resistance and it was first introduced in 1903. This test is intended for use to detect the condition of the winding inside the instrument. By knowing the resistance value, we can opt for suitable safety precautions to be taken for the device in order not to get … [Read more...]