What are the steps involved in lightning grounding inspection ? Can you briefly explain?

Before the lightning protection grounding test, first of all to understand the permissible value of the grounding resistance of the building to be inspected, for example, the permissible value of the grounding of the electronic information room should be less than 4 ohms, the grounding resistance of the gas station is less than or equal to 10 ohms. Specific testing steps can refer to the "building lightning protection device testing technical specifications" of the relevant requirements, testing requirements are as follows:

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