1. Standardisation of “methods for testing” characteristics of pyranometers and pyrheliometers

2. Main points Classification standard ISO 9060
Missing: Standard for testing instrument characteristics
Problem: confusion (freedom)
Problem: solar energy industry!!
Solution: Maintenance

3. Conclusion List of points of attention Indoor & “worst case” testing
Reactivation of ISO TC180
Volunteers

4. Myself Kees VAN DEN BOS Engineer Physics
Director / owner Hukseflux Thermal Sensors
Last 20 years sensor design

5. Hukseflux 2010

6. Hukseflux international

7. Hukseflux SR11 pyranometer
Founded 1993
Thermal sensors
15 employees
5 radiometry
compensation pyrheliometer
Hukseflux SR11 pyranometer

8. Urban Climate monitoring

9. Hukseflux solar concentrator sensors

10. ISO 9060

11. ISO 9060

12. Background Error function of: Characterisation / class Calibration
Measurement & maintenance conditions
Environmental conditions

13. ISO 9060

14. ISO 9060

15. Background Consultation of manufacturers Consultation of ISO TC180
New “testing” (of characteristics) standard
Revision of ISO 9060

16. New testing standard Based on indoor experiments
Connection with ISO 98-3 GUM:
“Worst case” as found in real outdoor conditions
Under non-ventilated conditions for non-ventilated instruments (heated conditions for heated instruments etc)

17. Revision ISO 9060 Reference conditions: Horizontal 500 W/m2
Normal Incidence
20 degrees C

18. Revision ISO 9060 Zero-offset A (larger!!, ventilated/ heated)
Non-Linearity (horizontal)
Sprectral selectivity (larger!!)
Directional error (separation from non-linearity)

19. Revision ISO 9060 Requirements for secondary standard
Now: comply on all specifications
Future: Non-linearity, tilt response, spectral by group compliance
Future: Non-Stability: not included

20. Miscellaneous
WMO mistake: confuses characterisation and errors due to calibration & conditions
WMO mistake: enters resolution
Ignore WMO?
Maintenance of ISO standards covering calibration.

21. Conclusion List of points of attention (new standard + ISO9060)
Indoor & “worst case” testing (GUM / ventilation)
Reactivation of ISO TC180
Volunteers

22. P. S. Memo available via server
Possible cooperation with EU sponsoring