UVP UVX Radiometer - Manual (Page 26)

UVX Radiometer 26
Safety Precautions
It is essential that adequate precautions be taken in applications using ultra-violet light sources.
Prolonged exposures to high intensities can cause painful inflammation of the conjunctiva (the outer
membrane of the eye) as well as histological effects in the cornea, iris, and lens of the eye. Reddening or
even burning of the skin (erythema), similar to sunburn, will be caused by excessive exposure to ultra-
violet energy. In extreme cases, permanent harmful effects can occur.
Individuals vary greatly in their sensitivity to ultra-violet radiation. Children, for example, are much more
sensitive to ultra-violet than are adults. Prolonged exposure of the unprotected skin and eyes should
always be avoided, and people with fair skins should avoid even occasional exposures. The effects of
ultra-violet exposure may not be felt immediately. Normally, several hours will elapse before over
exposure is detected.
Recommended reading: "Criteria for a Recommended Standard -Occupational Exposure to Ultra-Violet
Radiation", published by U.S. Department of Health, Education and Welfare, Public Health Service
Document HSM-73-11009, and "Practice for Occupational and Educational Eye and Face Protection",
published by the United States of America Standards Institute, Document USAS Z 87.1-1968.
These publications provide guidelines for maximum exposure to ultra-violet radiation in terms of time
intensity, and wavelength. The type of protection required to prevent over exposure to the eyes and skin
will vary depending on each of these parameters and each individual's susceptibility.
The wearing of protective eyewear, which greatly attenuates the transmission of ultra-violet radiation, is
always recommended when working in such environments. For low exposures, this preventive method
may be the only protection necessary.
The UVX Radiometer system is capable of measuring radiant incidence levels which are extremely
hazardous to unprotected personnel. In these cases (see recommended reading above), full face shields
and protective clothing over all exposed areas of the body are required.