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Calibration

Calibration

ExampleDefinitionsPurposeBenefitsQuotesOrganizationsUsageResourcesAccreditationTerminologySoftwareTypesCalibration is the act of comparing a device under test (DUT) of an unknown value with a reference standard of a known value. A person typically performs a calibration to determine the error or verify the accuracy of the DUTs unknown value. As a basic example, you could perform a calibration by measuring the temperature of a DUT thermometer in water at the known boiling point (212 degrees Fahrenheit) to learn the error of the thermometer. Because visually determining the exact moment that boiling point is achieved can be imprecise, you could achieve a more accurate result by placing a calibrated reference thermometer, of a precise known value, into the water to verify the DUT thermometer. A logical next step that can occur in a calibration process may be to adjust, or true-up, the instrument to reduce measurement error. Technically, adjustment is a separate step from calibration. It is interesting to note that the definition of some SI units has improved over time. For example, consider the historical changes to the definition of one second: Here is an example of why calibration uncertainty and measurement uncertainty are an important part of our daily lives. A typical gasoline pump in the United States can pump gas with an uncertainty of about 2 teaspoons (0.003 gallons) per gallon. Nobody is going to be upset if they are short a couple of teaspoons of gasoline, and the gas station may not lose much money by giving away two teaspoons of gasoline per gallon sold. However, if the uncertainty of the gasoline pump is 0.1 gallon, you can imagine how inappropriate this level of uncertainty would be for this measurement. You could be shorted a gallon of gas for every 10 gallons that you pump. So, the reason why uncertainty is so important in calibration and measurement is because it is needed to allow the owner of the instrument or the customer of the measurement to evaluate confidence in the instrument or the measurement. It could be an interesting experiment to ask a gasoline station manager for an estimate of uncertainty for one of their gasoline pumps! For several years, the simple 4 to 1 TUR (Test Uncertainty Ratio) has been implemented in many calibration processes. It basicSee more on us.flukecalCalibration Definition Meaning | Dictionary dictionary/browse/calibrationCalibration definition, the act or process of determining, checking, or rectifying the settings or gradations on a measuring instrument or other piece of precision equipment; the resulting condition of the equipment:I took the copter down to the beach to do the compass calibration, so as to be absolutely sure there was no metal around when I did it.

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