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36 results for “Systematic measurement error”
The component of measurement error that in replicate measurements remains constant or varies predictably. Known systematic errors are compensated by correction. VIM (JCGM 200…
…D.1.1.6 systematic error [VIM 3.14] mean that would result from an infinite number of measurements of the same measurand carried…
Measured quantity value minus a reference quantity value; comprises a systematic component and a random component. VIM (JCGM 200:2012) 2.16 General
Closeness of agreement between the average of infinitely many replicate measured values and a reference value. Trueness relates inversely to systematic error, not random…
The estimate of a systematic measurement error — typically the difference between the mean of repeated indications and an accepted reference value. VIM (JCGM 200…
…PM/AM noise measurement of the noise standard Sources of Error Estimated Fractional Error, % Effect Type Distribution Divisor Standard Fractional Uncertainty (σ), % Symbol Number…
…Theformer,derivedfromthe well-defined estimatedstandarddeviationofthemeanofastatednumberof measurements andtheassumption ofanormaldistribution, wasgivenasone- halfthe99-percentconfidenceintervalofthemean. The"systematic" part wasgivenasthelinearadditionof"limits"ofotherpossibleerrorsinthe measurement system. The"systematic" partwasclearlydominantinmostradio- activitycalibrations. Ifanoveralluncertainty…
…AS AN OUTERLIMITOFTHEDISTRIBUTION OF RANDOM ERRORS, THREETIMESTHE STANDARD DEVIATION IS USED. SYSTEMATIC ERRORS DUETOTHE PROCEDURES USEDORTOENVIRON- MENTAL EFFECTS ARE LARGELY BALANCEDOUTANDCANUSUALLY BE REGARDED ASNEGLIGIBLE…
…Any particular measurement can be decomposed as the sum of the unobserved true value, a random error (with expected value 0) and a systematic…
…IV.ESTIMATEDFLOWMETERUNCERTAINTIES Thepistonflowmeterhasbeeninregularuseforvacuum gaugeandleakcalibrationssince1984andthebellowsflow- metersincelate1985.Duringthistimedatahavebeencol- lectedontheuncertaintiescontributedbyindividualcompo- nentsoftheflowmeters aswellasontheoverall performance.Thesedatacanbeusedtoassesstheprobable errorsofbothflowmetersbetween10~ 6 and10~"mol/s. Theflowmetershavebeenoperatedatlowerflows,particu- larlythebellowsflowmeter,butfurtherdataarerequiredto fullyassesstheuncertaintiesbelow10~"mol/s.Thetotal…
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