Variable rotation and irradiation weathering testing machine

Details Variable rotation and irradiation weathering testing machine Variable rotation and irradiation weathering testing machine

1996-11-08

1998-12-29

Raevis, Robert

Measuring and testing

Simulated environment

73159, G01N 1700

Patent

active

058544330

ABSTRACT:
Material samples may be tested for weathering by a method which comprises securing the samples to a rack which rotates about a central radiation source, and exposing the samples to irradiation from the source at a first intensity of at least about 1.5 SUNS, while rotating the rack at a rate of at least about 6 rpm. Alternatively, a lower radiation intensity may be provided from the same apparatus, using a lower rotation rate. The method may also comprise a step of varying the inductance of a circuit supplying power to the central radiation source as one changes the intensity of the irradiation, to enhance the constancy of spectral distribution of the irradiation at the different intensities.

REFERENCES:
patent: 4329396 (1982-05-01), Kropp
patent: 4627287 (1986-12-01), Suga
patent: 4843893 (1989-07-01), Huber et al.
patent: 4874952 (1989-10-01), Arnaud et al.
patent: 5226318 (1993-07-01), Huber et al.
patent: 5477113 (1995-12-01), Christoffersson
patent: 5503032 (1996-04-01), Tikhtman et al.
patent: 5552221 (1996-09-01), So et al.

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