Module temperature sensor with temperature converter
This sensor measures the temperature of photovoltaic modules. To do this, the self-adhesive temperature sensor is attached to the rear of a module. A PT 100 thin film temperature sensor that is supplied with a 2 m long connection cable (wire: 7 × 0.2) is located in the silicon rubber plaster.
The signal for the Powador-proLOG is produced by the temperature converter PXT 10. The line resistances between the temperature sensor and converter are compensated. We also recommend a 230 V AC supply for the Powador-proLOG to relieve the internal power supply of the data logger.
Insolation sensor
The insolation sensor is used for the professional monitoring of a photovoltaic system. Based on the measured insolation, the anticipated yield of a photovoltaic system can be calculated and subsequently compared with the actual yield.
The short-circuit current of a silicon solar cell is proportional to the extent of insolation. Our insolation sensors use a monocrystalline solar cell, which is operated via a low-impedance resistance, thus creating a virtual short circuit. The positive temperature coefficient of the short-circuit current leads to a minor measurement error. Therefore, the silicon sensors incorporate active temperature compensation, which reduces these errors by a factor of 20. For this purpose, a special temperature sensor is laminated onto the rear side of the solar cell. All sensors are calibrated against sunlight using a pyranometer (Kipp & Zonen, type CM11).
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