The multifunctional meter of electrical installation parameters Sonel MPI-540-PV is an advanced tool created in particular for measuring parameters of photovoltaic installations. With the use of one device, it is possible to carry out a whole range of tests on the DC and AC sides in accordance with the guidelines of the EN 62446 standard. In addition, the Sonel MPI-540-PV is also used to carry out all measurements to determine the safety condition of domestic as well as industrial electrical installations. The presented meter is a device with advanced capabilities, dedicated to specialists operating in the installation and electrical industry. Features The meter has above-average functionality. It combines the measuring capabilities of several devices, while ensuring equally good accuracy. - MPI-540 can record 50/60 Hz power quality parameters in accordance to S class of EN 61000-4-30: Voltage L1, L2, L3, – average values in the range up to 500 V, » L1, L2, L3 currents, – average values, current measurement in the range up to 3 kA (depending on the current probes used), Frequency in the range of 40 Hz – 70 Hz, Active (P), reactive (Q) and apparent (S) power, Power factor (PF), cosφ, Harmonics (up to 40th for voltage and current), Total harmonic distortion (THD) for current and voltage. - MPI-540 can be used for all measurements for commissioning of electrical installations in accordance with applicable regulations: Short circuit loop impedance (also in circuits secured with RCDs), RCD parameters, Insulation resistance, Earth resistance (4 measurement methods + soil resistivity measurement), Continuity of protective and equipotential bondings, Light intensity measurement, Phase sequence test, Motor rotation direction test.