ISO/TC 108/SC 5/WG 11 - Thermal imaging

This document provides specific guidance on the interpretation of infrared thermograms as part of a programme for condition monitoring and diagnostics of machine systems. In addition, IR applications pertaining to machinery performance are addressed. This document is intended to: — provide guidance on establishing severity assessment criteria for anomalies identified by IRT; — outline methods and requirements for carrying out thermography of machine systems, including safety recommendations; — provide information on image interpretation, assessment criteria and reporting requirements.

ISO 18436-7:2014 specifies the requirements for qualification and assessment of personnel who perform machinery condition monitoring and diagnostics using infrared thermography. A certificate or declaration of conformity to ISO 18436-7:2014 will provide recognition of the qualifications and competence of individuals to perform thermal measurements and analysis for machinery condition monitoring using portable thermal imaging equipment. This procedure might not apply to specialized equipment or other specific situations. ISO 18436-7:2014 specifies a three-category classification programme that is based on the technical areas delineated herein.

ISO 18434-1:2008 provides an introduction to the application of infrared thermography (IRT) to machinery condition monitoring and diagnostics, where "machinery" includes machine auxiliaries such as valves, fluid and electrically powered machines, and machinery-related heat exchanger equipment. In addition, IR applications pertaining to machinery performance assessment are addressed. ISO 18434-1:2008: introduces the terminology of IRT as it pertains to condition monitoring and diagnostics of machines; describes the types of IRT procedures and their merits; provides guidance on establishing severity assessment criteria for anomalies identified by IRT; outlines methods and requirements for carrying out IRT of machines, including safety recommendations; provides information on data interpretation, and assessment criteria and reporting requirements; provides procedures for determining and compensating for reflected apparent temperature, emissivity, and attenuating media. ISO 18434-1:2008 also encompasses testing procedures for determining and compensating for reflected apparent temperature, emissivity, and attenuating media when measuring the surface temperature of a target with a quantitative IRT camera.

ISO 18436-7:2008 specifies the requirements for qualification and assessment of personnel who perform machinery condition monitoring and diagnostics using infrared thermography. A certificate or declaration of conformity to ISO 18436-7:2008 will provide recognition of the qualifications and competence of individuals to perform thermal measurements and analysis for machinery condition monitoring using portable thermal imaging equipment. This procedure may not apply to specialized equipment or other specific situations. ISO 18436-7:2008 specifies a three-category classification programme.