Codes, Standards, and Specifications
Key Standards
Infrared testing is governed by various standards. ASTM E1934 covers examination of electrical and mechanical equipment; ASTM E1186 for building diagnostics; ISO 18434-1 for machinery condition monitoring; NFPA 70B for electrical maintenance. These standards provide guidelines for procedures, qualifications, and reporting. For temperature measurement, ASTM E2847 covers calibration and accuracy. Specifications often define acceptance criteria, such as maximum allowable temperature rise or ΔT.
Traps in Questions
- Confusing the scope of different standards; e.g., ASTM E1934 is for equipment, not buildings.
- Assuming all standards are mandatory; some are guidelines.
- Overlooking the need to follow specific acceptance criteria defined in contracts or codes.
- Forgetting that standards are updated; always use the latest version unless specified.
Worked Example / Rule of Thumb
When in doubt, refer to the standard that matches the application. For electrical inspections, NFPA 70B recommends annual infrared inspections for critical equipment. Acceptance criteria are often based on ΔT; for example, a ΔT of 15°C may be acceptable for some components but not others. Always check the specific standard for exact thresholds.