Kipp&Zonen CGR 4 Pyrgeometers - Manual (Page 23)

CGR 4 Manual
4.16. Environmental
The CGR series are intended for outdoor use under all expected weather conditions. The radiometers
comply with IP 67 and their solid mechanical construction is suitable to be used under all environmental
conditions within the specified ranges.
4.17. Uncertainty
The measurement uncertainty can be described as the maximum expected hourly or daily uncertainty
with respect to the ‘absolute truth’. The confidence level is 95%, which means that 95% of the
datapoints lie within the given uncertainty interval representing the absolute value. Kipp & Zonen
empirically determine uncertainty figures based on many years of field measurements.
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