What types of test levels are there?

What types of test levels are there?

The test levels are set according to the intensity of electrostatic discharge. Specifically, they are as follows: Level 1: Contact discharge 2 kV, air discharge 2 kV Level 2: Contact discharge 4 kV, air discharge 4 kV Level 3: Contact discharge 6 kV, air discharge 8 kV Level 4: Contact discharge 8 kV, air discharge 15 kV Level X: Special conditions (custom settings according to specific applications or environments)