The calibration of the Electric Field Meter EFM51 is an essential service to ensure the accuracy and reliability of the measuring device. This service includes the inspection and adjustment of the device, which must be sent in for calibration. Upon completion of the calibration, customers receive a certificate confirming the conformity and precision of the device. The need for regular calibration arises from various factors, such as the frequency of use and specific operating conditions. Additionally, the requirements of relevant standards and manufacturer specifications must be considered. For the Electric Field Meter EFM51, it is recommended to plan calibration intervals according to the internal test equipment list, which typically range between one and three years. This regular maintenance ensures the precise function of the device in all application areas.