PCE Health and Fitness PCE-675, Руководство пользователя

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9.6 UV light
The UV light could be used for fluorescent leak detection to find
all system leaks quickly and easily.
Fluorescent leak detection
：
Add or inject the fluorescent agent
into the system and let it circulate with host fluid. Once circulation
is completed, use UV light to inspect for leak sites. The agent will
be fluorescent by the UV light, so that we can locate the leak sites.
10. Emissivity
The emissivity of the surface of a material is its effectiveness in
emitting energy as thermal radiation. It is the ratio of the thermal
radiation from a surface to the radiation from an ideal black
surface at the same temperature. The ratio varies from 0 to 1. The
bigger the ratio, the stronger the thermal radiation is from the
surface. The emissivity of surface of most materials is between
0.85~0.98. The default emissivity of this unit is set at 0.95;
however, it can be adjustable. Before measuring, please adjust it
to the suitable emissivity according to below table.