4. Measuring device immunity

4.1 General information on immunity testing

The aim of immunity testing is to guarantee reasonable immunity to various environmental disturbances, however infrequent (static electricity discharge (ESD), lightning), in order to avoid more or less pronounced damage resulting from malfunction. These consequences can range from simple inconvenience to serious material damage or even bodily injury.

For this reason, while until the early 1990s, manufacturers had no legal obligation to guarantee the electromagnetic immunity of their equipment, some countries, notably the European Community, have introduced a legal compliance requirement. In contrast, the legal obligation not to emit interfering signals (§ ) was in force long before.

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