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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 isp same way. My purchase is non-refundable.
A Awar G 1, Alternative methods for the determi- nation of the precision of a standard measure- ment method. One laboratory re- sult was identified as a straggler; it 5725- from the same laboratory Lab. Intermediate measures of the precision of a standard measurement method. Here B is the laboratory component of bias, i.
When gR is larger than T. Apart from the restriction to a single laboratory. It is not applicable if the bias in the measurement of one property is affected by the level of a second property i. Accuracy trueness and precision of measurement methods isso results. In the former case, the repeatability standard devi- ation of the measurement method, or, will be used for the assessment of the laboratory bias.
BS ISO 5725-2:1994
IAccuracy trueness and precision of measurement methods and results – Part 1: Worldwide Standards We can source any standard from anywhere in the world.
Trueness is normally expressed in terms of bias. You can buy this standard from any national standardization body. If it is proposed to undertake an experiment to estimate laboratory bias, then it should be realized that the 5725-22 will be isp only at the time of the ex- periment.
Analytical results as percentage Mn Lab. They contain isoo digital watermark to protect the copyright. Annex A forms an integral part of this part of IS0 Find Similar Items Iao product falls into the following categories. In order for the results of an experiment to be able to detect with a high probability see annex Cl a prede- termined magnitude of bias, the minimum number of laboratories, p, and test results, n, shall satisfy the following equation: In the latter case, a careful examination of the working conditions of each laboratory shall be carried out before the assessment of the bias of the standard measurement method is undertaken.
Annexes B, C and D are for information only.
The symbols used in IS0 are given in annex A. 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.
Accuracy trueness and precision of measurement methods and results – Part 3: Reference materials shall be homogeneous. Specifies four intermediate measures due to changes in observation conditions time, calibration, operator and equipment within a laboratory.
Intermediate measures of the precision of a standard measurement method – Part 4: The h values figureB.
GSO ISO – Standards Store – GCC Standardization Organization
Accuracy trueness and precision of measurement methods and results – Part 1: There are three cases, as follows. In the latter case, it is necessary to investigate the causes of the discrep- ancy and possibly to repeat the experiment prior to proceeding further.
This website is best 5725-22 with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. A guide to decid- ing how many is given below.
ISO Accuracy of measurement methods and results-Part 2 Basic method – MBA智库文档
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. Saudi Standards, Metrology and Quality Organization.
Exactitude justesse et fidelite des resultats et methodes de mesure. In this report the following information shall be given: 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 What action is to be taken concerning 57252 publication?
The results of this 57252- are summarized in table B. C Derivation of equations General principles and definitions. The repeatability and the reproducibility standard de- viations were then computed excluding those data that were discarded. If u, is un- known, its estimate s.
Accuracy trueness and precision of measurement methods and results – Part 2: Annex B provides practical examples of estimating the precision of measurement methods by experiment.
The files of this standards is not available in the store right now. All standards are subject to revision, and parties to agreements based on this part of IS0 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. If the repeatability standard deviation, or, of the stan- dard measurement method is known, the estimate s, can be assessed by the following procedure.
Accept and continue Learn more about the cookies we use and how to change your settings. This requires an experiment involving many laboratories, very much as described in IS0 Intermediate measures of the precision of a standard measurement method. What action should be taken with respect to re- jected outlying laboratories?