SIST EN ISO 3059:2013

Overview

EN ISO 3059:2012 (ISO 3059:2012) defines controlled viewing conditions for non-destructive testing (NDT) methods that rely on the human eye - specifically penetrant testing and magnetic particle testing. The standard specifies minimum requirements and measurement methods for illuminance (white light) and UV‑A irradiance (fluorescent inspection), calibration intervals, safety precautions and instrument response limits. Note: the document does not cover the use of actinic blue light sources.

Key topics and technical requirements

• Scope: Viewing-condition control when the human eye is the primary detection aid for penetrant and magnetic particle testing.
• Colour-contrast (white light) techniques
  • Inspection illuminance: ≥ 500 lx at the test surface (removal of excess penetrant: ≥ 350 lx).
  • In some situations, 1 000 lx minimum may be required.
  • Recommended light source colour temperature ≥ 2 500 K (preferably > 3 300 K).
  • Even illumination, no glare or reflections; allow light sources to stabilize.
• Fluorescent techniques (UV‑A)
  • UV‑A source: peak intensity at (365 ± 5) nm, FWHM ≈ 30 nm.
  • Removal of excess penetrant: ≥ 1 W/m² (100 μW/cm²) UV‑A and illuminance