Hukseflux - Model SR300-D1 -Industrial Class A Pyranometer with Heating and Tilt Sensor

• designed for IEC 61724-1 Class A compliant PV system performance monitoring
• internal heating for dew and frost mitigation in all climates
• integrated surge protection, designed to withstand the extreme conditions encountered on PV power plants, upgradable to 4 kV with optional SPD01 Surge Protection Device
• RS-485 isolation: Galvanic isolation, for reliable operation and flexibility in system design
• compliant with IEC 61326-1 “Industrial equipment” – rated for Industrial Electromagnetic Environments
• enables system designers to comply with local safety regulations
• supported by a worldwide calibration organisation for the lowest total cost of ownership

Hukseflux introduces “industrial-grade” solar radiation monitoring! The all-digital heated SR300-D1 pyranometer is engineered to measure solar radiation with the utmost reliability and measurement accuracy. SR300-D1 is the successor to our SR30-M2-D1 pyranometer, renowned worldwide as the ideal instrument for use in PV system performance monitoring.

SR300-D1 continues to provide the measurement accuracy of the SR30. It may look like it as well, but in many ways the SR300-D1 is a completely new instrument, tailored for use in PV monitoring systems.

SR300-D1 complies with – Industrial-grade – Immunity, Emission, Electrical, Environmental and Safety requirements for use in outdoor industrial environments, greatly improving measurement reliability.

Ease of operation is further enhanced through extended functionality and diagnostics.

PV system performance monitoring: IEC 61724-1 Class A compliant

SR300-D1 complies with IEC requirements for “Class A” PV system performance monitoring, without the need for additional accessories. It includes: 

• onboard heating for dew and frost mitigation
• accredited pyranometer calibration within the required uncertainty limit
• calibrated tilt sensor accurate within ± 1 ° as required for single axis tracker fault detection and pyranometer tilt measurement

Immunity to high voltages and currents - surges

SR300-D1 is tested and classified for Industrial Environments according to IEC 61326-1 and IEC 61000-6-2. When designing a measuring system, SR300-D1 users may reach several levels of immunity.

With the optional Surge Protection Device SPD01 this immunity can be increased to 4 kV. Up to 3 pyranometers can be protected with a single SPD01. A third-party SPD with similar specifications may be used instead.

To attain the required level of immunity for a given installation, some general system components should be included, such as:

• lightning protection system
• earthing and grounding network
• external surge protection in addition to the native on-board sensor protection

RS-485 isolation

The RS-485 interface of the industrial pyranometers is galvanically isolated from the internal electronics as well as from the instrument body. Both isolation barriers are rated at 1.5 kV. This contributes to reliable operation, flexibility in system design and reduced integration costs for all industrial pyranometers. 

Electrical safety in the workplace

A PV power plant is a potentially hazardous workplace environment. To comply with safety regulations, SR300-D1 features a dedicated earthing terminal for connection to protective earth. When the pyranometer is isolated from the mounting platform, it should still be properly earthed via this terminal. SR300-D1 allows system designers to comply with safety regulations. These are often based on EU and US electrical safety standards such as:

• EN-50110 Operation of Electrical Installations
• NFPA 70 National Electrical Code (NEC)