IS 15181 : Part 1 : 2024/ISO 9110-1 : 2020 Hydraulic Fluid Power - Measurement Techniques - Part 1 General Measurement Principles

ICS 23.100.01

PGD 36

NATIONAL FOREWORD

This Indian Standard (Part 1) (First Revision) which is identical to ISO 9110-1 : 2020 'Hydraulic fluid power - Measurement techniques - Part 1: General measurement principles' issued by the International Organization for Standardization was adopted by the Bureau of Indian Standards on the recommendation of the Fluid Power Systems Sectional Committee and approval of the Production and General Engineering Division Council.

This standard was first published in 2002. The first revision of this standard has been undertaken to align it with the latest version of ISO 9110-1.

The major changes in this revision are as follows:

a) New normative and informative references have been added;

b) New definitions have been added;

c) Classes of accuracy to measurement have been renamed;

d) Assessment of uncertainties has been revised and expanded and general measurement considerations and requirements have been renamed;

e) Guidance on gravity correction has been added;

f) Clause on 'Readability uncertainty evaluation' has been added;

g) Determination of uncertainty limits and classification of uncertainties has been combined and uncertainty limit specifications have been renamed;

h) Frequency of calibration has been revised and assurance control techniques have been renamed;

j) Clause on 'Total measurement uncertainty' has been added;

k) Original Annex A has been deleted;

m) New Annex A on 'Measurement system acceptance designated information sheet', has been added;

n) New Annex B on 'Uncertainty propagation', has been added; and

p) New Annex C on 'Best practices tutorial', has been added.

This standard is published in two parts. Other part in this series is:

Part 2 Measurement of average steady-state pressure in a closed conduit