Kipp&Zonen BSRN Scientific Solar Monitoring System - Manual (Page 104)

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Zero off-set
a)response to 200 W m net
+ 7 W m -2 -2
therm al radiation (ventilated)
b)response to 5 K h change
± 2 W m -1 -2
in am bient tem perature
Non-stability ± 0.5 %
percentage change
responsivity per year
Non-linearity ± 0.6 %
percentage deviation from the
responsivity at 500 W m due
-2
to the change in irradiance
within 100 W m to 1000 W m
-2 -2
Directional response for beam
radiation
± 10 W m -2
(The range of errors caused by
assum ing that the norm al incidence
responsivity is valid for all directions
when m easuring from any direction a
beam radiation whose norm al
incidence irradiation is 1000 W m )
-2
Spectral selectivity ± 2 %
percentage deviation of the product
of spectral absorptance and
spectral transm ittance from the
corresponding m ean within
0.35 :m and 1.5 :m
Tem perature response ±1%
percentage deviation due to
change in am bient tem perature
from -10 to +40 °C relative to 20 °C
Tilt response ±0.25%
percentage deviation from the
responsivity at 0° tilt (horizontal)
due to change in tilt from 0° to 90°
at 1000 W m irradiance
-2
Viewing angle 2 B sr
Irradiance 0 - 1400 W m (m ax.4000 W m ) -2 -2
Spectral range 305-2800 nm (50% points)
335-2200 nm (95% points)
Sensitivity between 4 and 6 :V/(W m ) -2
Im pedance 700-1500 Ohm
Receiver paint Carbon black
Glass dom es Schott K5 optical glass 2 m m thick,
30 m m and 50 m m outer diam eter
Desiccant Silicagel
Spirit level Sensitivity 0.1 degree