SR15-A1 Analogue "first class" Pyranometer with heater

SR15-A1 is a high-accuracy solar radiation sensor. It is” First Class” according to the ISO 9060:1990 standard and “Spectrally Flat Class B” in the 2018 revision. With its on-board heater, it is compliant in its standard configuration with the requirements for “Class B” PV monitoring systems of the new IEC 61724-1:2017 standard. SR15-A1 measures the solar radiation received by a plane surface from a 180 ^o field of view angle. This quantity, expressed in W/m² , is called “hemispherical” solar radiation. SR15-A1 pyranometer can be employed outdoors under the sun, as well as indoors with lamp-based solar simulators. Its orientation depends on the application and may be horizontal, tilted (for plane of array radiation) or inverted (for reflected radiation).

PV system performance monitoring: compliant with IEC class B

IEC 61724-1: Photovoltaic System Performance Monitoring - Guidelines for Measurement, Data Exchange and Analysis - requires heating for Class B monitoring. SR15-A1, with its on-board heater, offers Class B compliance without the need for additional accessories.

Measure: hemispherical solar radiation

ISO classification: first class pyranometer; spectrally flat class B pyranometer (2018)

IEC 61724-1 compliance: meets Class B PV monitoring system requirements

Calibration uncertainty: < 1.8 % (k = 2)

Calibration traceability: to WRR

Spectral range: 285 to 3000 x 10^-9 m

Sensitivity (nominal): 10 x 10^-6 V/(W/m²)

Analogue output: millivolt

Response time: < 10 s

Zero offset a: 5 W/m² unventilated

Rated operating temperature range: -40 to +80 °C

Temperature response: < ± 2 % (-10 to +40 °C)

Heater: 1.5 W at 12 VDC

Standard cable length: 5 m

Levelling: optional spring-loaded levelling, with / without tube mount