Standard Guide for Use of UV-A and Visible Light Sources and Meters used in the Liquid Penetrant and Magnetic Particle Methods

Importancia y uso:

5.1 UV-A and visible light sources are used to provide adequate illumination levels for liquid penetrant and magnetic particle examination. UV-A sources, UV-A radiometers, visible light sources, and illuminance photometers are used to verify specified viewing conditions.

5.2 Fluorescence is typically produced by irradiating the fluorescent dyes/pigments with UV-A radiation. The fluorescent dyes/pigments absorb the UV-A radiation and re-emit light energy in the visible spectrum. This process allows fluorescence to be observed by the human eye.

5.3 UV-A sources may emit visible light above 400 nm (4000 Å), which may reduce the visibility of fluorescent indications. High intensity UV-A sources may cause UV fade, causing fluorescent indications to degrade or disappear.

Subcomité:

E07.03

Referida por:

E0165_E0165M-23, E1210-21, E3022-18, E3024_E3024M-22A, E1209-18, E1208-21, E1417_E1417M-21E01, E1444_E1444M-22A, E3022-18, E1209-18, E1444_E1444M-22A, E0165_E0165M-23, E0543-21, E0543-21

Volúmen:

03.03

Número ICS:

17.180.20 (Colours and measurement of light), 19.100 (Non-destructive testing)

Palabras clave:

electromagnetic spectrum; UV-A exposure limits; UV-A lamp; UV-A measurement; UV-A radiometers; UV-A sources; visible light contamination; visible light measurement; visible light meters; visible light sources;