Introduction Core Balance Current Transformer or CBCT is a ring-type current transformer through the center of which a three core cable or three single core cables (forms the primary winding) of three phase system passes. This type of current transformer is normally used for earth fault protection for low and medium voltage system. A typical … Read more
Power electronics is a combination of two main branches of engineering i.e. power and electronics engineering. Power engineering deals with the generation, transmission, distribution, and utilization of electric energy at high power level whereas electronic engineering deals with the production, transmission, and reception of signals & data at the low power level. Power engineering machines/apparatus … Read more
Static Sensitivity Static Sensitivity of an instrument or an instrumentation system is defined as the ratio of the magnitude of the output signal or response to the magnitude of an input signal or the quantity being measured. The reciprocal of sensitivity is defined as inverse sensitivity or deflection factor. The sensitivity of an instrument should … Read more
In this article, we will see the difference between accuracy and precision terms. They are also most confusing terms in measurements regarding instruments. What is Accuracy? Accuracy is the closeness with which the instrument reading reaches the true value of the quantity being measured. 1. The accuracy of measurement means conformity to truth. 2. The … Read more
Soft Magnetic Materials These materials are easy to magnetise and demagnetise. These materials favour rapid switching (it means high frequency) of magnetism to applied ac field. These materials have low retentivity. Low coercivity. High permeability High magnetic saturation Low hysteresis losses because of the lesser area of the hysteresis loop. These materials are used for … Read more
Scale Range and Scale Span are two most confusing terms in measurement. Many a times students get confused with these two terms. Here I have clarified both these terms in the easy language. In analog instruments, the value of measurand is indicated by the pointer on a scale. A scale has some values mentioned on … Read more
In this article, we will learn about two important terms Reproducibility and Drift. These two terms are important for instruments in measurements. Reproducibility Reproducibility is defined as the degree of closeness with which a given value may be repeatedly measured. Drift Drift is the gradual shift in the indication or record of the instrument over … Read more
In this article, we will understand the concept of errors in measurement, types of errors in measurement in detail. This is most important and starting topic in measurements. True Value It is defined as the average value of an infinite number of measured values when average deviation due to various contributing factor approaches to zero. It … Read more
Data loggers are nowadays used by Environmental consultants, energy auditors, building managers, research scientists, engineers for recording data in many applications. We will know in detail about data loggers, its anatomy, working principle, advantages and applications. Data Logger It is an electronic instrument that records measurements at set intervals over a period of time. Data … Read more
Blood Flowmeters Blood flow-meters are the devices that monitor the blood flow in various blood vessels and measure the cardiac output. In the blood vessels, the blood flow rate is maximum along the axis of the vessel and decreases with the square of the distance from the axis, reaching zero at the wall … Read more