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14 results for “Instrument bias”
The average of replicate indications minus a reference quantity value — the instrument-level counterpart of measurement bias. VIM (JCGM 200:2012) 4.20 Instruments
…by calculating control limits and process bias using the control measurements obtained when calibration standards and measurement instruments are calibrated. These limits are to…
…Becauseofthestrongevidenceforthiswavelength biasandconfidenceinthewavelengthaccuracyof theNBSReferencespectrophotometer, andthe Table5,Acomparisonofthedataforreflectanceminimanum- bers7,14,and23asdeterminedontheVarian-Caryspec- trophotometerandtheNBSReferencespectrophotometer. ReflectanceMinima Varian-Cary Reference Difference BandSBW Instrument Instrument No. (nm) (1) (2) (2…
…photodiode,vsdthaccesstothebiascurrent,combinedwithanrfpowersensor overthefrequencyrangeof300kHzto55GHzat1319nm.Typical measurementuncertaintiesareabout0.05dB,whichincludesmeasurement repeatability,rfpowermeterscalingaccuracyandofifeet,opticalpowerdrift,bias currentmeasurement,andpowersensornoise.Themeasurementtechnique,based ontheheterodynebeatnotebetweentwosingle-frequencyNd:YAGlasers operatingat1319nm,isreviewedanditsimplementation isdescribed.Adetailed analysisofsourcesoferrorandestimatesofuncertaintyarepresented…
…E.Uncertainties 1.Instrumental Bias BecauseofthespecialdesignoftheRTS,thecombinedsystematicerror introducedbythespectrophotometer itselfintomeasurements ofthetrue regulartransmittance definedinSectionII.Ahasbeenminimized. The individualcomponentsofthiserrorarediscussed inReference[1]andare heresummarized asfollows. Beam-displacement anddefocusingeffects: Theseareundetectable…
…The check standard data will incorporate repeatability, bias, and resolution influence data; therefore, the laboratory should consider what uncertainty components could be double counted…
…3 For a measuring instrument, see “bias” ([VIM] 5.25). TN 1297 Comments: 1 As pointed out in the Guide, the error of the…
…The QED-200hadalimitedspectralrange(usually400nmto750nm)whereitoperatedwith100% QE,andsufferedfromlimiteddynamicrangeduetotherelativelyhighreverse-biasvoltage used.ThespectralpowerresponsivitywastransferredtocustomersatthistimebytheDetector ResponseTransferandIntercomparisonProgram(DRTIP).Customerswouldrentaradiometer fromNISTandtransferthedetectorscaletotheirworkingstandard(s). Thescalerelative uncertaintyrangedfrom0.6%to4%'overthespectralrangefrom250nmto1100nm[14]. Asecondgenerationtrapdetector(verysimilartothethencommercially availableGraseby…
…in order to cancel the effects of voltage bias offsets and thermal voltages. Commercial DCC instruments optimized for thermometry are available [21]. The distinction…
…Verify that all standards and instruments (e.g., mass standards, thermometer, barometer, and hygrometer) have sufficiently small standard uncertainties for the level of calibration…
Questions post under a public pseudonym. Be specific — instrument, method, standard.