First of all, ensure that the laser power supply can work normally, then turn on the chiller, the test tube is filled with water and there are no bubbles, then the laser can be used for testing.
Press the laser power test button (TEST)
If the laser tube does not emit light, but there is a “pop” fire, it means that the laser tube has leaked.
There is light in the laser tube, but there is no trace of laser burning when the laser is used to hit the test cardboard, it means that the laser tube has leaked (the laser tube has light in the laser tube and the light outlet cardboard test spot is normal).
Determine whether the laser tube is leaking by color (as shown in the figure below).