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17025 Accredited Solar Radiometer Calibration Services

ISO-CAL North America provides a wide range of calibration services to meet any requirement. No job is too big or small.

Calibration Services
Indoor Pyranometer Calibration

Radiometer Calibration Services

ISO-CAL North America provides a wide range of calibration services to meet any requirement, big or small. Indoors or out. Our vast calibration capability allows us to select the most appropriate calibration method best suited to meet each customer’s specific application requirement, facilitating optimal measurement certainty at the field or laboratory testing level. ISO-CAL North America maintains fully characterized primary and secondary reference radiometers, including NIST-traceable spectral irradiance standards.

When it comes to the calibration of broadband thermopile and photo-optic solar irradiance sensors, the accredited scope and capabilities of ISO-CAL North America are unmatched. Services include indoor and outdoor ISO 17025-accredited calibration services of all pyranometer, albedometer, and pyrheliometer makes and models to the ASTM or ISO calibration standard of choice: ASTM G167, ASTM E824, ASTM G207, ISO 9846, and ISO 9847 calibration standard for pyranometers and albedometers or ASTM E816 and ISO 9059 standard for the calibration or pyrheliometers.

Indoor Pyranometer Calibration
Pyranometer Accuracy
Pyranometer Accuracy

Lowest Expanded Calibration Uncertainty Estimate

All ISO-CAL North America sensor calibration returns include an ISO 17025-accredited certificate of calibration stating the before and post-calibration (sensitivity) result as well as the CMC expanded calibration uncertainty estimate on the reported calibration result, expressed as a percentage. The stated CMC expanded calibration uncertainty estimate on an ISO-CAL North America pyranometer, albedometer, or pyrheliometer calibration report is the lowest in the industry. Why does calibration uncertainty matter? The lower the CMC calibration uncertainty estimate, the lower the measurement uncertainty estimate at the field level according to the ASTM G213 standard. Calibrate with confidence, calibrate with ISO-CAL North America LLC.

Pyranometer Accuracy

Standards Compliance

Standards compliance includes calibration to all applicable ASTM and ISO solar radiometer calibration standards.

Reference Instruments

Absolute Cavity Pyrheliometers
ISO-CAL North America operates two Primary Standard Absolute Cavity Pyrheliometers, traceable to the WRR (World Radiometric Reference). The Absolute Cavity Pyrheliometer is the primary standard reference instrument to which all pyranometers and pyrheliometers are traceable.

Both Absolute Cavity Pyrheliometers employ a new state-of-the-art control system developed by Campbell Scientific Inc. The compact portable control system features Campbell Scientific’s latest CR6 model data logger. The control system fully automates cavity operation, data processing, and storage.

FEL Irradiance Standard
The FEL Standard Lamp provides absolute calibration of spectral irradiance from 250 – 1100 nm, serving as the primary reference for all spectroradiometer and UV radiometer calibrations.

Digital Multi-Meter
• ISO 17025-calibrated 8.5 digit Keithley 2002 model high-performance digital multimeter.

Multifunction Process Calibrator
• ISO 17025-calibrated 7.5 digit Datron 4708 multifunction calibration standard

First-Class Pyrheliometers
• WRR-traceable Hukseflux DR02 first-class pyrheliometer
• WRR-traceable Kipp & Zonen CH-1 first-class pyrheliometer

Secondary Standard Pyranometers
• Two WRR-traceable Hukseflux SR20 secondary standard pyranometers
• Two WRR-traceable Kipp & Zonen CMP11 secondary standard pyranometers

Note: ISO-CAL North America operates both indoor and outdoor solar radiometer calibration facilities, enabling calibration of virtually any broadband solar radiometer according to ASTM and ISO calibration practices.

IR (Infrared) Pyrgeometers
• WISG-traceable Hukseflux IR20 FIR pyrgeometer
• WISG-traceable Kipp & Zonen CG4 FIR pyrgeometer

• Optronic Laboratories (Gooch & Housego) model OL754 high-performance spectroradiometer, spectral response range from 250 – 800 nm
• EKO Instruments MS-700 precision global spectroradiometer, spectral response range from 350 – 1050 nm

Global UV-A/B Radiometers
• Kipp & Zonen dual-band UV-S-AB-T UV-A/B radiometer, spectral response range 280 – 400 nm
• Indium 1.1 dual-band UV-A/B radiometer, spectral response range from 265 – 400 nm
• Kipp & Zonen CUV4 total UV radiometer, spectral response range from 280 – 400 nm

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