ISO 18899:2013

Overview

ISO 18899:2013 - Rubber - Guide to the calibration of test equipment - provides principles and practical guidance for the calibration of rubber test equipment. The standard defines general requirements to ensure measurement traceability, to establish logical calibration intervals, and to support estimation and expression of measurement uncertainty. It briefly describes methods of calibration for many parameter types relevant to rubber testing and points to applicable reference standards.

Key Topics

• Principles of calibration: definitions and the relationship between instruments and reference standards (calibration, verification, metrological confirmation).
• Calibration systems and traceability: building a calibration system that maintains traceability to national/international standards.
• Calibration intervals: guidance and a code-letter system to help decide frequency of recalibration based on risk and historical data.
• Measurement uncertainty: applying the Guide to the Expression of Uncertainty (GUM) concepts to rubber test measurements.
• Records and documentation: requirements for calibration records, reports and long-term traceability of measurement data.
• Conditioning and procedures: preparation of instruments and standard procedures for consistent calibration results.
• Parameter-specific guidance: concise calibration methods or references for:
  • Electrical (current, voltage, resistance, frequency, wattage)
  • Dimensional (length, profiles, surfaces, sieves)
  • Fluids (flow, pressure, viscosity, density)
  • Optical (irradiance, refractometers, colour)
  • Temperature and relative humidity
  • Chemical analysis and reference materials (glassware, pH)
  • Force and mass (tensile/compression machines, transducers, balances)
  • Miscellaneous timing and speed measurements (timers, tachometers)

Applications

ISO 18899:2013 is intended for organizations that perform rubber testing or rely on rubber test data, including:

• Materials and rubber testing laboratories - to ensure test equipment is calibrated and results traceable.
• Quality assurance teams and manufacturers - for maintaining measurement confidence in production and R&D.
• Calibration laboratories - for developing calibration procedures tailored to rubber test devices.
• Accreditation bodies and auditors - as a reference when evaluating measurement management systems (ISO 9000, ISO/IEC 17025). This guide helps users reduce measurement risk, set defensible calibration intervals, and report uncertainties in compliance with measurement management requirements.

Related standards

ISO 18899 references and aligns with general metrology standards such as ISO 9000, ISO 10012, and ISO/IEC 17025, and recommends using the Guide to the Expression of Uncertainty for uncertainty evaluation.

Keywords: ISO 18899, calibration, rubber test equipment, measurement traceability, calibration intervals, measurement uncertainty, test equipment calibration guide.