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required for a PV system (DC section) and controls of the functionality of modules / strings
in accordance with IEC/EN62446 guideline
PVCHECK: safety checks
PVCHECK verifies the continuity of the protective conductors (and associated
connections) and measures the insulation resistance of the active conductors on a
module, a string, or a photovoltaic field in accordance to IEC/EN62446 guideline, without
the need of any external switch to short-circuit the positive and negative terminals.
PVCHECK: functionality checks
PVCHECK verifies the functionality of a PV string in accordance to the IEC/EN62446
guideline by measuring the open circuit voltage and the short-circuit current at operating
conditions and extrapolating the results to the STC (by measuring the solar radiation).
Finally, it displays the measurements and a comparison to the PV strings previously
tested
