ASME PTC 19.1:1998 pdf download

12-12-2022 comment

ASME PTC 19.1:1998 pdf download Test Uncertainty
3.2 GLOSSARY
accuracy: the closeness of agreement between a mea-sured vaiue and the true vaiue.
calibration: the process of comparing the response ofan instrument to a standard instrument over somemeasurement range.
calibration hierarchy: the chain f calibrations whichinks or traces a measuring instrument to a primarystandard.
confidence ievel: the probability that the true valuefalls within the specified limits.
degrees of freedomm (v): a sammple of N vajues is saidto have N degrees of freedom, and the first statisticcalculated from it also is said to have N degrees offreedom. The degrees of freedom are reduced by. onefor each previously calculated statistic used to calcu-late a new statistic.
elemental error; the systematic or random error associ-ated with a single error source.
elermenlal uncerlainly: the systematic or random un-certainty associated with a single uncertainty source
estimnale: a value calculated from a sampie which isused to estimate the true value of an entire populationFor example, the sample standard deviation, S, is anestimate of the population standard deviation, o.influence coefficient: see sensitivity.
mcan (X): the arithmetic average of N readings
measurement error (8): the true, unknown differencebetween the measured value and the true value.
paramefer; a measured quantity, such as temperaturepressure, or stress, used in deriving a result. The definition differs from that used in statistics.
population: the set of all possible measurements of aparameter.
random error (e): sometimes called precision; the truerandom error which characterizes a member of a setof measurements. e varies in a randum, GaussianNormnai manner, from measurement to measurement
resu/t (R): a value calculated from a number of param-eters.
sample size (N): the number of individual measurements in a sample or used to calculate a mean.
sensitivity: the ratio of the change in a result to a unitchange in a parameter.
population standard deviation (o): a value whichquantifies the dispersion of a population.
standard crror of cstimatc (SEE): the measure of dispersion of the dependent variable about a least squaresregression or curve.
statistic: any numerical quantity dcrivcd from the sample data. X and S are statistics.
Student’s t: a value used herein to estimate the uncertainty for a given confidence level, obtained from tables entered with degrees of freedom at the chosenconfidence leve!.
systematic error (B): sometimes called bias; the truesystematic or fixed error which characterizes ever)member of any set of measurements from the population. The constant component of the total measurement error, 8.
systematic uncertainty (B): the 95% confidence levelestimate of the limits of a true systematic error, Boften determined by judgment.
traceability: the ability to trace the calibration of ameasuring device through a chain of calibrations toa primary standard. Traceability does not guaranteeaccuracy,it only indicates documented calibrationhicrarchy.
true value: the actua! value of the parameter beingmeasured.

                                           Related Information                                             Download
PS:Thank you for your support!
ASME B107.100:2002 pdf download ASME Standards

ASME B107.100:2002 pdf download

ASME B107.100:2002 pdf download WKENGHLD INCORPORATING ASME B107.6, ASME B107.9, ASME B107.39, and ASME B107.40 4.5 Proof Torque When tested as specified, wrenches shall withstand the proof torque specified in the applicable tables without failure or permanent...
Read More
ASME BPE:2002 pdf download ASME Standards

ASME BPE:2002 pdf download

ASME BPE:2002 pdf download BIOPROCESSING EOUIPMENT GR-1 INTRODUCTION This Standard provides the requirements applicableto the design of bioprocessing equipment inciudingaspects related to sterilily and cleanability,dimensionsand tolcranccs, surfacc finish, material joining, andscals. Thcsc apply to: (a) componcnts that...
Read More
ASME N509:2002 pdf download ASME Standards

ASME N509:2002 pdf download

ASME N509:2002 pdf download NUCLEAR POWER PLANT UNITS AID CDMPONENTS 1 SCOPE This Standard covers requirements for the designconstruction, and qualification and acceptance testingof the air-cleaning units and components which makeup Engineered Safety Feature (ESF) and other...
Read More

LEAVE A REPLY

Anonymous netizen Fill in information