is the European harmonized standard for "Electrical equipment for measurement, control and laboratory use – EMC requirements – Part 1: General requirements."

Websites offering a free are almost always:

It is the standard used to demonstrate conformity with the EU Electromagnetic Compatibility (EMC) Directive (2014/30/EU). If you manufacture scientific instruments, industrial sensors, or laboratory gear, this is likely the primary standard you must meet to get the .

| Phenomenon | Test Standard | Test level | |------------|--------------|-------------| | Electrostatic Discharge (ESD) | IEC 61000-4-2 | ±8 kV air / ±4 kV contact | | Radiated RF | IEC 61000-4-3 | 10 V/m (80 MHz – 1 GHz) | | Electrical Fast Transients (Burst) | IEC 61000-4-4 | ±2 kV (I/O), ±4 kV (power) | | Surge (Lightning) | IEC 61000-4-5 | ±1 kV (L-L), ±2 kV (L-PE) | | Conducted RF | IEC 61000-4-6 | 10 V (0.15 – 80 MHz) | | Voltage dips & interruptions | IEC 61000-4-11 | 0% for 1 cycle, 70% for 25 cycles |