Overview
ISO 18436-7:2014 - "Condition monitoring and diagnostics of machines - Requirements for qualification and assessment of personnel - Part 7: Thermography" defines the requirements to qualify and assess personnel who use infrared thermography for machinery condition monitoring and diagnostics. The standard establishes a three-category classification (Category I, II and III) and specifies minimum training, eligibility, and assessment criteria to demonstrate competence in thermal measurement, analysis and reporting using portable thermal imaging equipment.
Key technical topics and requirements
- Three-category classification:
- Category I - competent to perform thermographic surveys and basic fault detection, set up/operate cameras, basic image post‑processing, database maintenance and calibration verification.
- Category II - adds selection of techniques/hardware, advanced fault diagnosis, advanced post‑processing, report preparation, and supervision of Category I personnel.
- Category III - develops thermography programmes, defines procedures/acceptance criteria, performs prognostics, recommends corrective actions and manages condition monitoring programmes; supervises Cat I & II.
- Training and minimum hours (Annex A & Table 1):
- Category I: 32 hours
- Category II: 64 hours
- Category III: 96 hours
- Eligibility: combination of education, training and experience; colour vision screening (Ishihara 24-plate test) is advised and documented where required.
- Assessment: examination content and conduct are defined (see Clause 6); candidates must show required knowledge and practical skills for their category.
- Referenced normative documents: aligns with ISO 18436‑1, ISO 18436‑3 and other ISO condition monitoring standards (e.g., ISO 13372, ISO 18434‑1).
Practical applications and who uses this standard
- Maintenance and reliability engineers implement predictive maintenance programmes using thermography to detect electrical and mechanical anomalies (e.g., overheating bearings, loose electrical connections).
- Thermographers and inspection technicians use the standard to verify competence, meet employer requirements and obtain certification.
- Training and assessment bodies design courses and exams compliant with Annex A/B and ISO 18436‑3 requirements.
- Plant managers and asset owners rely on certified personnel to ensure accurate thermal surveys, correct diagnosis and effective corrective actions, reducing downtime and maintenance costs.
- Consultants and condition monitoring programme managers use Category III guidance to create monitoring strategies, acceptance criteria and programme governance.
Related standards
ISO 18436-7:2014 is essential for organisations seeking standardized, auditable competence in infrared thermography for machinery condition monitoring and predictive maintenance.
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