Top Quality Photochromic Coating UV Lens Tester Detector Measurer Lens Testing Machine 3 Function in 1 Set UP-400A

2, Put our stardard lens into the testing point, then adjust the golden konb to keep the UV value on the screen be the same with our stardard lens.

3,Take out our stardard lens and then put on the lens you want to test,now the value on the screen is the UV value for your lens. 【HOW TO TEST TEST COATING LENS】 1,Find the two black convex rubber on the right side of machine.Let the lens you want to test touch the two rubber, if you could hear'Bleep''Bleep'from the machine, it means the lens is the coating lens, otherwise, it is not 【PHOTOCHROMIC LENS TESTING】 1,Put the lens you want to test into the central of sivery bowl  which is on the left side.

2,Then press the small red button, the LED lamp will be on, 15seconds later, the LED lamp will turn off automatically.By then take out the lens to check whether the lens is darken or not.