ISO 48-9:2018
Rubber, vulcanized or thermoplastic — Determination of hardness — Part 9: Calibration and verification of hardness testers
This document specifies procedures for the calibration and verification of durometers of types A, D, AO and AM (see ISO 48-4), IRHD pocket meters (see ISO 48-5), IRHD dead-load instruments (see ISO 48-2) and dead-load instruments using the very low rubber hardness scale (see ISO 48-3).
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Measurands and metrological requirements for calibration and verification
4.1 Environmental conditions
4.2 Metrological requirements
5 Calibration and verification methods
5.1 Requirements to be met by the measuring instruments used for the calibration and verification methods
5.2 Outline of the calibration and verification methods to be used
5.2.1 Indentors
5.2.2 Geometry of the pressure foot
5.2.3 Depth of indentation
5.2.4 Contact force of the pressure foot
5.2.5 Spring force
5.2.6 Contact and total force of IRHD dead-load instruments
5.2.7 Duration of force application
6 Calibration and verification certificate
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Measurands and metrological requirements for calibration and verification
4.1 Environmental conditions
4.2 Metrological requirements
5 Calibration and verification methods
5.1 Requirements to be met by the measuring instruments used for the calibration and verification methods
5.2 Outline of the calibration and verification methods to be used
5.2.1 Indentors
5.2.2 Geometry of the pressure foot
5.2.3 Depth of indentation
5.2.4 Contact force of the pressure foot
5.2.5 Spring force
5.2.6 Contact and total force of IRHD dead-load instruments
5.2.7 Duration of force application
6 Calibration and verification certificate