UV test step 1: Plug in the power, switch to 1st gear, the indicator light is on : Place the reference lens in the UV test center area of the lens, and then adjust the UV value adjustment knob so that the UV value of the UV value display window matches the value of the reference lens. 3: Remove the reference lens and then put the lens to be tested. The value displayed on the display window is the test value. Color changing lens test step : 1: Plug in the power, the switch is adjusted to the second gear, the indicator light is not bright 2: Place the color-changing lens in the color-changing test area, press the color-changing switch, the color-changing purple light is on, after 15 seconds, the lens is completely discolored, and the light is automatically turned off Lens radiation test step 1: Plug in the power, turn the switch to the first gear, the indicator lights up 2: Touch the lens to be tested to the test head of the anti-radiation lens. If the machine emits a drip sound, it is a radiation-resistant lens. If it does not emit, it is a non-radiation-resistant lens. Specifications: Name: Lens Anti-irradiation Tester Product weight: 0.9kg Packing list: 1 Tester 1 Manual Note:If you have any questions, please feel free to contact us, we will provide you with the best solution within 24 hours.Application:Using the detector, you will be able to judge whether the lens can easily block UV rays and anti-radiation lenses and discolored lenses. Calibration:Align the center of the standard lens with the UV test port, and adjust the knob so that the digital display value is the same as the standard value. For the accuracy of the instrument, the values ?must be calibrated with standard lenses at regular intervals. Clear Instructions:Clear test results, clear LED display, light on color change dropping sound. Conducive to the sale of discoloration lenses radiation protection lenses UV protection lenses, successfully convince customers. Multi-function:Can test Anti-ultraviolet and anti-radiation lenses and discolored lenses. LED displays the specific value, the maximum can reach 400. It can perfectly replace the UV400 tester. Versatile Testing: The Photochromic Coated Lens Tester is a versatile tool that allows you to test the UV and radiation resistance of various lenses. From sunglasses to prescription glasses, this tester provides accurate results to ensure the lenses' durability and protection.