Kipp&Zonen CMA 6 Albedometers - Manual (Page 41)

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Instruction Manual - CMP/CMA series
Response time (95%)
Zero offsets
(a) Response to 200 W/m² net thermal radiation (ventilated)
(b) Response 5 K/hr change in ambient temperature
Non-stability
percentage change in responsivity per year
Non-linearity
percentage deviation from the responsivity at 500 W/m² due to the change of irradiance within the range 100 W/m² to 1000 W/m²
Directional response (for beam radiation)
the range of errors caused by assuming that the normal incidence responsivity is valid for all directions when measuring from any
direction a beam of radiation whose normal incidence irradiance is 1000 W/m²
Spectral selectivity
percentage deviation of the product of spectral absorptance and spectral transmittance from the corresponding mean within 0.35 µm
and 1.5 µm
Temperature response
percentage deviation due to change in ambient temperature within an interval of 50 K
Tilt response
percentage deviation from the responsivity at 0° tilt (horizontal) due to change in tilt from 0° to 90° at 1000 W/m² irradiance
1
2
3a
3b
3c
3d
3e
3f
Response time (95%)
Zero offsets
(a)
(b)
Non-stability
Non-linearity
Directional response
(for beam radiation)
Spectral selectivity
Temperature response
Tilt response
Second Class
< 60 s
± 30 W/m²
± 8 W/m²
± 3.0%
± 3%
± 30 W/m²
± 10%
8%
± 5%
First Class
< 30 s
± 15 W/m²
± 4 W/m²
± 1.5%
± 1%
± 20 W/m²
± 5%
4%
± 2%
Second Class
< 18 s
< 15 W/m² (1)
< 5 W/m²
< 1%
< 1%
< 20 W/m²
up to 80° zenith angle
< 3%
< 5%
(-10°C to +40°C)
interval of 50 K
< 1%
Secondary Standard
< 5 s
< 7 W/m² (1)
< 2 W/m²
< 0.5%
< 0.2%
< 10 W/m²
up to 80° zenith angle
< 3%
< 1%
(-10°C to +40°C)
interval of 50 K
< 0.2%
Secondary Standard
< 5 s
< 7 W/m² (1)
< 2 W/m²
< 0.5%
< 0.2%
< 10 W/m²
up to 80° zenith angle
< 3%
< 1%
(-20°C to +50°C)
interval of 70 K
< 0.2%
Secondary Standard
< 5 s
< 3 W/m² (1)
< 1 W/m²
< 0.5%
< 0.2%
< 5 W/m²
up to 80° zenith angle
< 2%
< 0.5%
(-20°C to +50°C)
interval of 70 K
< 0.2%
First Class
< 18 s
< 15 W/m² (1)
< 4 W/m²
< 1%
< 1%
< 20 W/m²
up to 80° zenith angle
< 3%
< 4%
(-10°C to +40°C)
interval of 50 K
< 1%
Secondary Standard
< 15 s
± 7 W/m²
± 2 W/m²
± 0.8%
± 0.5%
± 10 W/m²
± 3%
2%
± 0.5%
1
2
3a
3b
3c
3d
3e
3f
Reference number ISO Pyranometer Categories
Reference number and Specification
CMP10, 11/CMA 11 CMP 22 CMP 21 CMP 6/CMA 6 CMP 3
ISO 9060:1990 classification
Appendix B. Pyranometer classification to ISO 9060:1990(E)
(1) without ventilation