fraunhofer solar sensor certificationIndeed, after months of working, we have developed a reference PV cell dedicated to the calibrations and sent it to  FRAUNHOFER CalLab, (laboratory for PV cells and PV module measures, internationally accredited  ilac-MRA).

The reference PV cell has undergo to two-stage process, that has allowed to achieve a measure with an uncertainty of only 1.3%.

A Reference PV cell calibrated with that accuracy is a distinctive factor: it decreases the uncertainty during our adjustments operations.  On the market, usually, a PV Cell pyranometer  is adjusted with an uncertainty much greater than only 1.3%!

By  September 2015 also the calibration of other manufacturer sensor’s will be done by using that reference PV cell.

Glossary of metrology terms:

Uncertainty = is the mathematical notation of margin of error  of a measurement.  When explicitly stated, express the range of values that enclose the true value. Tipical denotation is:

                        measured value (±uncertainty)

Accuracy = of a measurement system,  is the degree of closeness of values measurated of a magnitude to that magnitude’s true value

Calibration = “operation that, underspecified conditions, in a first step, establishes a relation between the  quantity values with measurement uncertainties provided by measurement standards and corresponding indications with associated measurement uncertainties and, in a second step, uses this information to establish a relation for obtaining a measurement result from an indication” (←  JCGM 200:2008 International vocabulary of metrology )

Adjustment= “set of operations carried out on a measuring systemso that it provides prescribed  indications corresponding to given values of a quantity to be measured” (←  JCGM 200:2008 International vocabulary of metrology )

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