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IS0 consists of the following parts, under the general title Accuracy trueness and precision of measurement methods and results: In particular, if outlying values are de- tected, all necessary steps shall be taken to investi- gate the reasons why they have been obtained, including re-appraisal of the suitability of the accepted reference value. You may find similar items within these categories by selecting from the choices below:. Ministry of Commerce and Industry.
These intermediate measures can be established by an experiment within a specific laboratory or by an inter It is not applicable if the bias in the measurement of one property is affected by the level of a second property i. Annex A forms an integral part of this part of IS0 In the former case, the repeatability standard devi- ation, cr, will be used for the assessment of the bias of the measurement method.
The laboratory means and vari- ances for each of the five test materials are listed in table 8. The faster, easier way to work with standards. Methode de base pour la determination de la repetabilite et de la reproductibilite d’une methode de mesure normalisee.
ISO Accuracy of measurement methods and results-Part 2 Basic method – MBA智库文档
The k values figure B-7 show that laboratories If the repeatability of the measurement method is poor, then it will not be practical to achieve a high degree of certainty in the estimate of the bias of the laboratory. The reference material should have a matrix as close as possible to the matrix of the material to be subjected to the standard measurement method, e.
Ein grundlegendes Verfahren fuer die Ermittlung der Wiederhol und Vergleichspraezision von festgelegten Messverfahren. Basic method for the determination of repeatability and re- producibility of a standard measurement method – Part 3: Accuracy trueness and precision of measurement methods and results – Part 3: Intermediate measures of the precision of oso standard measurement method – Part 4: Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
BS ISO 5725-2:1994
The results of this computation are summarized in table B. Calibration-different Equipment-different Identifier for a particular laboratory Identifier for intermediate measures of precision; in brackets, identification of the type of intermediate situation ldentif ier for a particular level IS0 Methode de base pour la determination de la repetabilite et de la reproductibilite d’une methode de mesure normalisee Title in German Genauigkeit Richtigkeit und Praezision von Messverfahren und Messergebnissen.
Specifies four intermediate measures due to changes in observation conditions time, calibration, operator and equipment within a laboratory. A technical corrigendum was issued for this standard after its publication. Accuracy trueness and precision of measurement methods and results – Part 1: Al- though, for some measurement methods, the true value cannot be known exactly, it may be possible to have an accepted reference value for the property being measured; for example, if suitable reference materials are available, or if the accepted reference value can be established by refer- ence to another measurement method or by preparation of a known sample.
In the latter case, a careful examination of the 525-2 conditions of each laboratory shall be carried out before the assessment of the bias of the standard measurement method is undertaken. To request this FREE document, please email us.
Each laboratory re- ceived two randomly selected bottles of test sample for each level and performed duplicate analyses on each bottle. Each member body interested in a subject for which a technical committee has been established has the right isl be represented on that committee.
GSO ISO – Standards Store – GCC Standardization Organization
The work of preparing International Standards is normally carried out through IS0 technical committees. This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. All measurements are to be carried out according to that standard method. The differences are a there is an additional requirement to use an ac- cepted reference value, and b the number of participating laboratories and the number of test results shall also satisfy the re- quirements given in 4.
When a value for the bias of a measure- ment method is quoted, together with a test result obtained by that method, there is an implication that the same characteristic is being measured in exactly the same way.
General principles and definitions – Part 2: Looking to purchase to post on your company’s Intranet? Accuracy trueness and precision of measurement methods and results – Part 2: It was therefore decided to discard the results from laboratory 10 completely; isso should be the object of special attention, and the matter should be resolved.