Understanding of Introductory Concepts of Measurement and Testing and the Meaning of Related Terms and Expressions

Q1.Distinguish between measurement and testing A1.Measurement is specify as the order of data, the value of certain variables such as resistance, electric potential and online whitethorn be found at certain points in a circuit or system. These determine are obtained exploitation relevant measurement instruments and techniques. Testing is defined as manipulating the values gained during the measurement physique described above to determine whether or not a circuit or system on a lower floor test is run correctly or at supreme efficiency. Q2.Explain the meaning of reply and indicate what determines it for an elongate and for a digital measuring doodad. A2.Resolution is defined as the magnitude of signal homogeneous to one find of the least significant digit of the display. This mover the smallest signal ability that it is possible to measure. For a digital contrivance the resolution is impelled by the number of digits after the quantitative point on a particul ar range. For an analogue gubbins resolution is refractory by the width of the needle and the blank space between abutting graticules on the display. Q3.Distinguish between accuracy and sensibility of an instrument, quote examples of ordinary formulas for analogue and digital meters A3.

Accuracy is the limit, unremarkably expressed as a percentage of full measure deflection (FSD) not exceeded by errors when the instrument is under graphic symbol conditions ie if the accuracy of a certain catch is 1% of FSD between certain temperatures, if the device if used between those temperatures to measure voltages on a 10V range, the maximum difference between the voltage being measured and that displayed should be 1% of 10V (0.1V! ). The accuracy figure is required as no instrument will invariably be perfectly accurate. Typical accuracy for a digital device is +/- 0.1V + 2LSD (Least Significant Digit). Typical accuracy for an analogue device is +/- 2.5% FSD. Usually quoted... If you want to get a full essay, do it on our website: OrderEssay.net

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