Electronics Instrumentation

Definition: Anderson’s Bridge is an AC bridge that determines the self-inductance of an inductor in the circuit. This bridge offers highly accurate output and is an advancement of Maxwell’s inductance capacitance bridge. By Anderson's bridge, one can measure inductance by utilizing other circuit components like resistors and capacitor. In Maxwell’s bridge, the inductance is calculated by comparing it with a standard variable capacitance. In this article, we will discuss the construction, … [Read more...] about Anderson’s Bridge

Definition: Potentiometer is an instrument that is used the determine the potential (voltage) between two points by performing a comparison with a known voltage. Basically, in order to do so, a manual variation in resistance is performed so as to control the current flow thereby determining the required voltage. Potentiometers are normally abbreviated as POT and are nothing but variable resistors that measures the emf between two existing points. The circuit of a potentiometer provides the … [Read more...] about Potentiometer

Definition: The instruments that are used to express the measuring quantity in numeric format is known as Digital Instruments. A digitized information is somewhat easy to be handled and transmitted thus widely preferred nowadays. Quantization is the basis of working of a digital instrument. It is an act of transforming an analog signal into its digital form. Digital instruments are composed of logic circuits that carry out measurement of the quantities. Due to several advantages of digital … [Read more...] about Digital Instruments

Definition: Wheatstone bridge is a type of dc bridge that is used for the measurement of unknown resistance. It is a series-parallel combination of 4 resistances that provides zero difference voltage at the balanced condition. The principle of null indication is the basis of working of Wheatstone bridge and thus provides high accuracy in measurements. It consists of four resistances, out of which 2 are known resistances, one is variable resistance that is used to balance the bridge and … [Read more...] about Wheatstone Bridge

Definition: Resistance thermometer is a device that is used to determine temperature by the variation in the resistance of a conductor. It is commonly known as Resistance Temperature Detector (RTD) and is an accurate temperature sensor. RTD is not used for dynamic temperature measurement. Working Principle of Resistance Thermometer As we know, in Resistance thermometer, the resistance of the conductor is dependent on the variation in temperature. When the temperature of the metal is … [Read more...] about Resistance Thermometer (Resistance Temperature Detector)

Definition: Sampling Oscilloscope is an instrument that is used to generate waveform by collecting various samples of an electrical signal. It is basically an advancement of digital oscilloscope having additional features for special purposes. It utilizes the principle of Stroboscopic light technique and is used in order to analyse fast electrical signals. In sampling oscilloscope from various portions of the waveforms, different samples are taken, over consecutive cycles and the overall … [Read more...] about Sampling Oscilloscope

Definition: AC bridges are the circuits that are used for the measurement of electrical quantities such as inductance, capacitance, resistance. Along with these an ac bridge allows us to measure storage factor, loss factor, dissipation factor etc. AC bridges operate with only AC signal. An AC bridge is used to provide phase shifting and providing a feedback path to the oscillator. AC Bridge network construction An AC bridge consists of 4 nodes with 4 arms, a source excitation and a balanced … [Read more...] about AC Bridges

Definition: Digital Voltmeter is a voltage sensitive device. It measures AC or DC voltage and displays the value directly in numeric form instead of pointer deflection. DVM is an acronym for Digital Voltmeter. DVM was first invented in 1954 by Andrew Kay. There exist many factors that affect the measurement accuracy of a digital voltmeter(DVM). These are basically temperature, input impedance, variation in power supply voltage etc. As we know that an analogue instrument provides results by … [Read more...] about Digital Voltmeter (DVM)

Definition: Strain gauge is a device which is when subjected to some force results change in resistance of the material. The change in resistance is measured in terms of either load or displacement. It basically measures strain on the application of stress. Strain gauge directly is used for the measurement of load and indirectly it is used for the measurement of displacement. The strain gauge was invented in 1938, by Edward E Simmons and Arthur C Ruge. Strain gauges are employed as … [Read more...] about Strain Gauge

Definition: Digital Storage Oscilloscope is an instrument that analyses the signal digitally and stores the data in the electronic digital memory. By examining the stored traces in memory, it can display visual as well as numerical values. It digitizes the input signal in order to have subsequent digital signals. The input is stored in digital memory in the form of 0 and 1. This stored digitized signal is then viewed on the CRT screen after the signal reconstruction in analog form. Here, … [Read more...] about Digital Storage Oscilloscope