SRA30-M2-D1 albedometer

SRA30-M2-D1 digital spectrally flat Class A albedometer with heating and ventilation

SRA30 digital spectrally flat Class A albedometer with heating and tilt sensor

AMF03 Albedometer mounting kit for 2 x SR30 / SR15 pyranometers

Albedometers are increasingly popular in bifacial PV modules monitoring

Digital Class A (secondary standard) albedometer with heating and tilt sensor

SRA30-M2-D1 digital spectrally flat Class A albedometer is an instrument that measures global and reflected solar radiation and the solar albedo, or solar reflectance. SRA30-M2-D1 is the most accurate albedometer available, and heated for the best data availability. It is composed of one AMF03 albedometer mounting kit and two SR30-M2-D1 spectrally flat Class A (previously "secondary standard") pyranometers. This pyranometer is compliant in its standard configuration with the requirements for Class A PV monitoring systems of the IEC 61724-1:2017 standard. Each pyranometer has a thermopile sensor, the upfacing one measuring global solar radiation, the downfacing one measuring reflected solar radiation. AMF03 includes one glare screen, one mounting fixture with rod, mounting hardware and tools. The modular design facilitates maintenance and calibration.

Specifications

Measurand

global solar radiation and reflected solar radiation

Optional measurand

albedo or solar reflectance
net solar radiation

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Specifications
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Specifications

Measurand

global solar radiation and reflected solar radiation

Optional measurand

albedo or solar reflectance
net solar radiation

SRA30-M2-D1 specifications

Included

2 x SR30-M2-D1, 1 x AMF03

IEC 61724-1 compliance

meets Class A PV monitoring system requirements

Calibration uncertainty

< 1.2 % (k = 2)

Heating

included

Ventilation

included

Mounting

mounting rod with 15 x 10⁻³ m diameter

Rated operating temperature

-40 to +80 °C range

SR30-M2-D1

Included sensors

2 x identical ISO 9060 spectrally flat Class A pyranometer SR30-M2-D1

Output

digital Modbus RTU over RS-485

Temperature response

< ± 0.4 % (-30 to +50 °C)

Temperature response test and directional response test

reports included

Power consumption

< 3 W at 12 VDC

Standard cable length

5 m (see options)

Digital output

Output

irradiance in W/m²; instrument body temperature in ° C; tilt angle in °; internal humidity in %; ventilator speed in RPM

Communication protocol

Modbus

Transmission mode

Hardware interface

2-wire (half duplex) RS-485

Rated operating voltage range

8 to 30 VDC

AMF03

Included parts

1 x glare screen; 1 x AMF03 fixture with rod; 1 x conical positioner; 2 x M5x12 socket head cap screw; 1 x M6x8 socket head cap screw, 2 x M8x12 set screw, 1 x mounting and fixation instruction sheet

Options

longer cables, in multiples of 5 m

Downloads

SRA30-M2-D1 albedometer brochure

Description

SRA30-M2-D1 design

SRA30-M2-D1 consists of two identical pyranometers model SR30-M2-D1, one facing up, one facing down. To create an SRA30-M2-D1, the two sensors are combined with one AMF03 albedometer mounting kit. AMF03 includes a fixture with rod for mounting purposes and a glare screen. The user assembles these modular components into an SRA30 albedometer. Mounting hardware, tools and a mounting and fixation instruction are part of AMF03. The modular design of SRA30 facilitates maintenance and calibration.

The best albedometer for the PV industry

SRA30-M2-D1 is the most accurate albedometer available. Its benefits:

Heating and ventilation included, complying with IEC 61724-1 Class A PV system requirements
Digital outputs: easy implementation & servicing
Best-in-class temperature response < ± 0.4 % (-30 to +50 °C), best “zero offset a” and best calibration uncertainty
Test certificates for temperature- and directional response included as required by ISO 9060
Re-calibration registers fully accessible to users
Modular; can be calibrated as separate pyranometers

Using SRA30 albedometer is easy

The instrument is composed of two SR30 spectrally flat Class A pyranometers; the upfacing one measuring global solar radiation, the downfacing one measuring reflected solar radiation. When using SR30, the irradiance in W/m² is transmitted via the Modbus protocol over 2-wire RS-485. The working principle and specifications of the pyranometers can be found in the SR30 user manual. SRA30 can be connected directly to commonly used datalogging systems.

Albedometers are used for general meteorological observations, building physics, roof reflectance studies, climate studies and solar collector testing. A common application is for outdoor solar radiation balance measurements as part of a meteorological station. Albedometers are increasingly popular in bifacial PV module performance monitoring. This application requires horizontal levelling; a bubble level and a mounting rod are included. Each SR30-M2-D1 pyranometer includes a tilt sensor.

SR30-D1 pyranometer is heated for high data availability, featuring RVH - Recirculating Ventilation and Heating - technology

Heated for high data availability, featuring RVH technology

High data availability is attained by heating of the outer dome using ventilation between the inner and outer dome. RVH - Recirculating Ventilation and Heating - technology, developed by Hukseflux, suppresses dew and frost deposition and is as effective as traditional ventilation systems, without the maintenance hassle and large footprint.