Lightning protection standards establish certain periods for the verification and maintenance of the installed systems, which may vary depending on the normative. However, one point is the same in all of them: a complete verification is necessary every time the installation has been stroke by lightning. Mechanical or electrical lightning event counters record these strikes with one account every time a lightning current passes trough them.

Lightning protection systems shall work correctly for many years.  Therefore it is essential to assure the immutability of their components under different environments and extreme conditions.

End of the 18th Century. Discovery of the electrical nature of lightning and the possibility of avoiding its damages by giving the lightning current a path to ground. This led to the installation of air terminals, down-conductors and earthing on the highest and most important existing buildings, thus avoiding many of the personal and economical damages caused by fires and breaks due to lightning.