ISO 18898:2016
Rubber — Calibration and verification of hardness testers
ISO 18898:2016 specifies procedures for the calibration and verification of durometers of types A, D, AO and AM (see ISO 7619‑1), IRHD pocket meters (see ISO 7619‑2), IRHD dead-load instruments (see ISO 48) and dead-load instruments using the very low rubber hardness scale (see ISO 27588).
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Foreword
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
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