Ammeter Error Calculation
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removed. (June 2015) (Learn how and when to remove this template message) This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (December 2009) (Learn percentage error of ammeter how and when to remove this template message) Instrument error refers to the combined accuracy ammeter shunt calculation and precision of a measuring instrument, or the difference between the actual value and the value indicated by the instrument (error). Measuring how to calculate ammeter and voltmeter instruments are usually calibrated on some regular frequency against a standard. The most rigorous standard is one maintained by a standards organization such as NIST in the United States, or the ISO in European countries. However, in
How To Calculate Ammeter Reading In A Circuit
physics—precision, accuracy, and error are computed based upon the instrument and the measurement data. Precision is to 1/2 of the granularity of the instrument's measurement capability. Precision is limited to the number of significant digits of measuring capability of the coarsest instrument or constant in a sequence of measurements and computations. Error is ± the granularity of the instrument's measurement capability. Error magnitudes are also added together when making multiple measurements for calculating a how to calculate ammeter in a parallel circuit certain quantity. When making a calculation from a measurement to a specific number of significant digits, rounding (if needed) must be done properly. Accuracy might be determined by making multiple measurements of the same thing with the same instrument, and then calculating the result with a certain type of math function, or it might mean for example, a five pound weight could be measured on a scale and then the difference between five pounds and the measured weight could be the accuracy. The second definition makes accuracy related to calibration, while the first definition does not. Removing instrument error[edit] The instrument error is not like random error, that can't be removed. Sometimes the removal of instrument errors are very easy, but it is case dependent. In Engineering instruments, like voltmeter or ammeter for example, the instrument error is very difficult to remove. Ammeter has built in resistance, which can't be removed either way. So the only way is to minimize it. On the other hand, the removal of error of a thermometer is a bit simple. Only the calibration has to be removed and then again calibrate it carefully. Sometimes, the user doesn't care for removal of error from the instrument, else he compensates it in calculation, for example, the zero error in Vernier Caliper is eliminated by proper calculation.[citat
b. Ammeter EO 1.3EXPLAIN how the following electrical test equipment and measuring devices are connected to a circuit: b. Ammeter Ammeter The ammeter measures ammeter equation electric current. It may be calibrated in amperes, milliamperes, or microamperes. In
How To Measure Ammeter
order to measure current, the ammeter must be placed in series with the circuit to be tested (Figure 6).
Internal Resistance Of Ammeter
Figure 6 Ammeter When an ammeter is placed in series with a circuit, it will increase the resistance of that circuit by an amount equal to the internal resistance of https://en.wikipedia.org/wiki/Instrument_error the meter Rm. Equation (14-3) is the mathematical representation of the current without the meter installed. Equation (14-4) is the mathematical representation of the current with the meter installed in the circuit. The accuracy of the ammeter KAis the ratio of the current when the meter is in the circuit, IW, to the current with the meter out of the circuit, http://www.tpub.com/doeelecscience/electricalscience2165.htm 10. Equation (14-5) is the mathematical representation for solving for the accuracy of the ammeter (KA). By substitution laws, Equation (14-6) is a mathematical representation of the accuracy using circuit resistance. The percent loading error is that percent of error due to loading effects that result from the added resistance of the meter. Equation (14-7) is a mathematical representation of the percent loading error. A second error which occurs in an ammeter is calibration error. Calibration error is an error that occurs due to inaccurately marked meter faces. Typical values of calibration error in terms of full scale current are about 3 percent. Figure 7 Ammeter Accuracy Example: An ammeter, with a 10 mA full scale deflection and an internal resistance of 400 , is placed in a circuit with a 20 V power source and a 2 K resistor (Figure 7). Find: 1. accuracy 2. %loading error 3. true current 4. measured current An ammeter with a full scale Im can be shunted with a resistor RSH in order to measure currents in excess of Im (Figure 8). The r
from GoogleSign inHidden fieldsBooksbooks.google.comhttps://books.google.com/books/about/Electronic_Instrumentation_3e.html?id=4Dh-cv0o8TUC&utm_source=gb-gplus-shareElectronic Instrumentation, 3eMy libraryHelpAdvanced Book SearchGet print bookNo eBook availableTata McGraw-Hill EducationAmazon.comBarnes&Noble.comBooks-A-MillionIndieBoundFind https://books.google.com/books?id=4Dh-cv0o8TUC&pg=PA14&lpg=PA14&dq=ammeter+error+calculation&source=bl&ots=1dISLrgMkk&sig=U0pkt3zSkoCd80R5TL08JRMt0h4&hl=en&sa=X&ved=0ahUKEwiCw6v_46rPAhWBrRoKHdOaCMAQ6AEIcDAQ in a libraryAll sellers»Get Textbooks on Google PlayRent and save from the world's largest eBookstore. Read, highlight, and take notes, across web, tablet, and phone.Go to Google Play Now »Electronic Instrumentation, 3eTata McGraw-Hill Education, 2010 how to - Electronic instruments - 829 pages 10 Reviewshttps://books.google.com/books/about/Electronic_Instrumentation_3e.html?id=4Dh-cv0o8TUC Preview this book » What people are saying-Write a reviewUser ratings5 stars64 stars13 stars32 stars01 star0User Review - Flag as inappropriatesattisfied..User Review - Flag as inappropriategoodAll 10 reviews»Selected how to calculate pagesTitle PageTable of ContentsIndexContentsIndicators and Display Devices 25 Ammeters 64 Voltmeters and Multimeters 79 Digital Voltmeters 128 Digital Instruments 147 Oscilloscope 176 Signal Generators 233 Wave Analyzers and Harmonic Distortion 260 Transducers 406 Signal Conditioning 493 Filters 532 Measurement Setup 605 Data Acquisition System DAS 626 Data Transmission 680 Frequency Standards 713 Control Systems 733 MoreMeasuring Instruments 278 Bridges 322 Recorders 370 Answers to Objective Type Questions 817 322 820 Copyright LessOther editions - View allElectronic InstrumentationKalsi H SLimited preview - 2004Electronic InstrumentationKalsi H SLimited preview - 2004ELECTRONIC INSTRUMENTATION, 3EKALSILimited preview - 2012View all »Common terms and phrasesA/D converter accuracy amplitude analog applied att
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