The whole system was calibrated by standard lamp with the standard transferred from the national primary photometric and colorimetric standard.
系统量值传递是通过国家色度和亮度基准标准灯来完成的。
2
Infrared photometric method, the standard method to determine oil quality in China, is the only method which is not only qualitative but also quantitative.
The main contents of standard "Nighttime Photometric Performance and Test Methods of Retro-reflective Pedestrian Markings", are the test principium, points and steps of the retro-reflective markings.