The MI-530 Pyranometer Selector (MTI.AWS.EK.530) is used to help monitor and assess PV modules with varying positions and orientations. Up to x5 pyranometers can be used to measure irradiance in the plane of the PV module. The irradiance measurements of the sensor in the plane of array are then synchronised with the I-V measurement, using an I-V Tracer like the MP-160.