Encyclopedia Knowledge

What is an Ohmmeter? Ohmmeter Definition An ohmmeter is defined as a device that measures electrical resistance, indicating how much a material opposes electric current. Ohmmeters types Series Type Ohmmeter The ohmmeter connects a battery, a series adjustable resistor, and a meter for readings. The

What is a Flow Meter? Flow Meter Definition A flow meter is defined as a device that measures the flow rate of solids, liquids, or gases. Types of Flow Meters Mechanical Flow Meters Optical Flow Meters Open Channel Flow Meters Mechanical Flow Meters Positive Displacement Flow Meters These meters mea

What is a Water Meter? Water Meter Definition A water meter is a type of flow meter which is used to monitor the flow rate of water through a pipe. There are two common approaches to water flow measurement – displacement and velocity. Common displacement designs include oscillating piston and nutati

Digital Voltmeter Definition A digital voltmeter is an electronic device that measures voltage by converting the analog signal into digital data and displaying it numerically. Working Principle The block diagram of a simple digital voltmeter is shown in the figure. Input Signal: This is the voltage

How to Use a Digital Multimeter? Digital Multimeter Definition A digital multimeter is defined as a device that measures electrical parameters like voltage, current, and resistance, displaying the results digitally. Main Parts The main parts of a digital multimeter include the display, selection swi

What is a Digital Frequency Meter? Digital Frequency Meter Definition A digital frequency meter is defined as an instrument that accurately measures and displays the frequency of periodic electrical signals. Function It counts and displays the number of events occurring within a set time interval, r

Low Power Factor Wattmeter Definition A low power factor wattmeter is an instrument used to measure low values of power factor accurately. Why Standard Wattmeters Fail The value of deflecting torque is very low even though we fully excite the current and pressure coils. Errors due to pressure coil i

Electrodynamometer Wattmeter Definition An electrodynamometer type wattmeter measures electrical power by using the interaction between magnetic fields and electric currents. Working Principle Now let us look at constructional details of electrodynamometer. It consists of following parts. There are

Three Phase Power Measurement Definition Three phase power measurement involves using different methods to determine the total power in a three-phase circuit, depending on the number of wattmeters used. Three Wattmeters Method Uses three wattmeters connected to each phase and neutral line in a four-

What is LVDT? Definition of LVDT The LVDT, or Linear Variable Differential Transformer, is an inductive transducer that converts linear motion into an electrical signal. It is highly valued for its precision and reliability. The output across secondary of this transformer is the differential thus it

What is Tan Delta Test? Tan Delta Test Definition Tan delta is defined as the ratio of the resistive to capacitive components of electrical leakage current, indicating insulation health. Principle of Tan Delta Test When a pure insulator is connected between the line and earth, it acts like a capacit

What is an Oscillator Transducer? Oscillator Transducer Definition An oscillator transducer is a device that converts force, pressure, or displacement into a measurable voltage. Working Principle The quantity to be measured like pressure is applied to the force summing device which transfers this pr