Overview
ISO 14605:2013 specifies the light source and radiometric measurement requirements for laboratory evaluation of semiconducting photocatalytic materials (fine/advanced ceramics) under an indoor lighting environment. The standard defines suitable fluorescent lamps, UV sharp cut‑off filters, measurement instruments and test/reporting conditions for assessing performance of indoor light‑active photocatalysts (artificial‑light driven photocatalysts). Note: “indoor lighting environment” excludes direct sunlight through windows.
Key topics and technical requirements
- Lamp types and colour properties
- Use halophosphate or triphosphor fluorescent lamps with correlated colour temperature ~3800–4500 K (F4000).
- Triphosphor lamps should have CIE Ra > 80; halophosphate typical Ra ≈ 60.
- Typical spectral power distributions are specified for reproducible testing.
- UV sharp cut‑off filters
- Two filter types defined:
- Type A: TLT ≈ 416 nm ± 5 nm; transmittance ≤ 0.1% at 400 nm; RoS ≈ 14 nm ± 5 nm; average transmittance 450–780 nm > 80%.
- Type B: TLT ≈ 392 nm ± 5 nm; transmittance ≤ 0.1% at 380 nm; RoS ≈ 14 nm ± 5 nm; average transmittance 420–780 nm > 80%.
- If non‑standard filters are used, report spectral transmittance, product name/number, manufacturer and thickness.
- Measurement instruments and units
- Illuminance measured in lux (lx) using a calibrated illuminance meter traceable to national standards.
- UV irradiance measured in W/m² or mW/cm² with a UV radiometer specified in ISO 10677.
- Test conditions and procedures
- Stabilize lamps for ≥15 minutes before measurement.
- Measure illuminance and UV irradiance with and without UV filter; set test illuminance per the relevant material test standard.
- Replace lamps when illuminance falls to 70% of initial value.
- Monitor filter transmittance and replace or re‑measure periodically (filters can degrade under irradiation).
- Reporting
- Test reports must reference ISO 14605:2013 and include lamp/filter instrument details, transmission/emission data and measured illuminance/UV irradiance at the sample surface.
Applications and users
- Intended for laboratories, materials scientists and manufacturers of fine/advanced ceramics who develop or certify indoor light‑active photocatalytic surfaces (self‑cleaning, antibacterial, deodorizing, pollutant removal).
- Useful for quality assurance, product development, comparative performance testing and regulatory or certification testing where controlled indoor‑lighting photocatalytic performance must be demonstrated.
Related standards
- ISO 10677 - Ultraviolet light source for photocatalyst testing
- IEC 60081 - Fluorescent lamp performance specifications
- CIE 13.3 - Colour rendering measurement methods
Keywords: ISO 14605:2013, light source, photocatalytic materials, indoor lighting, UV sharp cut‑off filter, illuminance meter, UV radiometer, fine ceramics, performance evaluation.
Open preview (PDF)Fine ceramics (advanced ceramics, advanced technical ceramics) — Light source for testing semiconducting photocatalytic materials used under indoor lighting environment
