1.UV-400 correcting knob

2.UV-400 test point

3.UV-400 display position of data

4.correcting button for transmittance's perentage

5.test point of lens transmittance

6.index display position of lens transmittance

7.test button for transmittance's percentage

8.correcting knob of transmittance data

9.radiation-resistant pilot lamp

10.radiation-resistant test point