| Aktuelles

Improved measurement uncertainty for all Si sensors and classification A

The measurement uncertainty of Si sensors with voltage output (Si-V-XX) is now ± 4.0 W/qm ± 1.6% from reading and with current output (Si-I-XX ± 4.5 W/qm ± 1.6% from reading.

Now all our Si sensor are class A as per IEC 61724-1.

The measurement uncertainty of each sensor type is listed in the new data sheet.

Our digital Si sensor are already classified as class A with a now improved measurement uncertainty of ± 0.4 W/qm ± 1.6% from reading.

This new improve measurement uncertainties are valid for the whole working temperature range, spectrum AM1.5 and vertical light beam. The calculation was done according to GUM (Guide to the Expression of Uncertainty in Measurement) with k=2.

We are continuously working on the improvement of our Si sensors. Achieving this high accuracy we are calibrating further on with a reference cell calibrated at the Physikalisch Technischen Bundesanstalt (PTB, National Metrology Institute of Germany).

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New digital Si Sensor with 2 Connectors for external Temperatur Sensors

We have added the type Si-RS485TC-3T-MB to our well known digital Silicon irradiance sensors. The Si-RS485TC-3T-MB has two connectors for external temperature sensors. With this you can measure beside the solar irradiance also for example the PV module (Tmodul-Si) and the ambient temperature (Tamb-Si). Alternative also two module temperature sensors Tmodul-Si could be connected. The connectors have numbers, so the measured values can easily be identified.

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| Aktuelles

Si Sensor with improved measurement uncertainty

The measurement uncertainty of every digital Si sensor Si-RS485TC-XX is now class A as per IEC 61724-1 as well as every Si-mV-85-Pt100(0) in case an external temperature compensation in the datalogging is done.

Measurement uncertainty of all other Si sensors are class B as per IEC 61724-1.

Due to continuous optimization of our production and especially of the calibration we were able to reduce the measurement uncertainty of our Si sensors significantly.

Please have a look at the attached data sheet with more information about the measurement uncertainty and a documentation regarding the standards.

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| News

DAkkS calibration of Si sensors, measurement uncertainty up to 1.2%

The solar cell calibration laboratory in the Calibration and Test Centre (CalTeC) at the Institute for Solar Energy Research (ISFH) is the first accredited calibration laboratory ...

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