Learn about the do's and don'ts of illuminance meters
1. The illuminance meter probe is made of glass, which is easy to fall and break, and at the same time the waterproof effect is very poor when used.
2. Use requirements:
① photocell application of good linearity of selenium (Se) photocells or silicon (Si) photocells; long working hours can still maintain good stability, and high sensitivity; high E when the choice of high-resistance photocells, its sensitivity is low and good linearity, by the bright light is not easy to be damaged
② paid within the V (λ) correction filter, suitable for illuminance with a different color temperature light source, the error is small
③ photocell before the addition of a cosine angle compensator (opal glass or white plastic) because the incident angle is large, the photocell deviates from the cosine rule
④ illuminance meter should work at room temperature or near room temperature (photocell drift with the temperature change and change) The above is the use of the instrument maintenance.
Illuminance has a close relationship with people's lives. Adequate light can prevent people from accidents. On the contrary, too dark light can cause human fatigue far more than the eyes themselves. Unsuitable or poor lighting conditions are therefore one of the main causes of accidents and fatigue. Available statistics show that about 30% of all accidents in occupational labor are directly or indirectly caused by insufficient light. To the stadium (hall) of the light to ** very strict, too strong or too dark light will affect the effect of the game.
So, people live indoors on the illumination of hygiene to ** how? Illumination is a very important indicator in hygiene. Light refers to electromagnetic radiation that can cause the human eye light sensation, when the light into the eye can produce the perception called vision. The light that people see is visible light, which has a wavelength range between 380 and 760 nm (nanometers).
