ISO 5725-2 PDF

Buy PN ISO ACCURACY (TRUENESS AND PRECISION) OF MEASUREMENT METHODS AND RESULTS – PART 2: BASIC METHOD FOR THE. Buy NBR ISO ACCURACY (TRUENESS AND PRECISION) OF MEASUREMENT METHODS AND RESULTS – PART 2: BASIC METHOD FOR. DS/ISO ACCURACY (TRUENESS AND PRECISION) OF MEASUREMENT METHODS AND RESULTS – PART 2: BASIC METHOD FOR THE.

Author: Arashimuro Zulular
Country: Martinique
Language: English (Spanish)
Genre: Art
Published (Last): 23 February 2016
Pages: 498
PDF File Size: 15.57 Mb
ePub File Size: 17.24 Mb
ISBN: 748-9-17500-410-1
Downloads: 85013
Price: Free* [*Free Regsitration Required]
Uploader: Zulkree

Analysis of the results showed that the between- bottle variation was indeed insignificant; the sample was considered to be homogeneous. IS0 l should be read in conjunction with all other parts of IS0including this part, because it gives the underlying definitions and general principles.

BS ISO 5725-2:1994

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. Further regular testing is required to show that the labora- tory bias does not vary; the method described in IS0 may be used for this.

Ein grundlegendes Verfahren fuer die Ermittlung der Wiederhol und Vergleichspraezision von festgelegten Messverfahren. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. 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 Your basket is empty.

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.

The purpose of the two-bottle system was to confirm the absence of the between-bottle variation.

GSO ISO – Standards Store – GCC Standardization Organization

Alternative methods for the determi- nation of the precision of a standard measure- ment method. If the bias is found to be statistically insignif- icant, then the objective is to determine the magnitude of the maximum bias that would, with a certain probability, remain undetected by the results of the experiment.

Unless otherwise specified, no part of this publrcation may be reproduced or utrlized In any form or by any means, electronrc or mechanical, rncludrng photocopyrng and mrcrofilm, wrthout permission in writing from the publisher.

  CUB CADET MOWER MANUAL PDF

The differences are a there is an additional requirement to isl an ac- cepted reference value, and b the number of 57725-2 laboratories and the number of test results shall also satisfy the re- quirements given in 4. To request this FREE document, please email us. Intermediate measures of the precision of a standard measurement method – Part 4: The files of this standards is not available in the store right now. In this report the ieo information shall be given: Intermediate measures of the isp of a standard measurement method.

It may appear that some laboratories did not use the required equipment or did not work ac- cording to the specified conditions. However, for practical reasons, the choice of the number of laboratories is usually a compromise between the availability of re- sources and the desire to reduce the value of 6, to a satisfactory level. In the former case, the repeatability standard devi- ation, cr, will be used for the assessment of the bias of the measurement method.

Annex B 572-52 practical examples of estimating the precision of measurement methods by experiment. Thus results from each laboratory can be considered as replicates under repeatability conditions. Here B is the laboratory component of bias, i.

Looking to purchase to post on your company’s Intranet? In the latter case, it is necessary to investigate the causes of the discrep- ancy and possibly to repeat the experiment prior to 572-52 further. The analytical results are listed in tableB.

Do the results of the accuracy experiment justify the acceptability of the measurement method for adoption as a standard?

If it is proposed to undertake an experiment to estimate laboratory bias, then it should be realized that the estimate will be valid only at the time of the ex- periment.

Unless otherwise stated, a is assumed to be 0, Reference materials could be either a certified reference materials; b materials manufactured for the purpose of the experiment with known properties; or c materials whose properties have been established by measurements using an alternative measure- ment method whose bias is known to be negligi- ble. IS0 consists of the following parts, under the general title Accuracy trueness and precision of measurement methods and results: We use cookies to make our website easier to use and to better understand your needs.

  LA REINE MORTE MONTHERLANT PDF

Prior to conducting the as- sessment of trueness, a check of the precision of the standard measurement method as applied by the lab- oratory shall be performed. 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 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. The symbols used in IS0 are given in annex A.

As a result the experiment may have to be repeated to yield the expected preci- sion values.

ISO Accuracy of measurement methods and results-Part 2 Basic method – MBA智库文档

Basic methods for the determination of repeatability and reproducibility of a standard measurement method. 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.

Ministry of Commerce and Industry. When gR is larger than T. My purchase is non-refundable. A guide to decid- ing how many is given below. Take the smart route to manage medical device compliance.

Analytical results as percentage Mn Lab. You can buy this standard from any national standardization body. Accept and continue Learn more about the cookies we use and how to change your settings. The units should be selected on a random basis for distribution.

Worldwide Standards We can source any standard from anywhere in the world. Amplifies the general principles to be observed in designing experiments for the numerical estimation of the precision of measurement methods by means of a collaborative interlaboratory experiment, provides a detailed practical description of the basic method for routine use in estimating the precision of measurement methods, provides guidance to all personnel concerned with designing, uso or analysing the results of the tests for estimating precision.

All measurements are to be carried out according to that standard method. Search all products by.

Author: admin