Kipp&Zonen BSRN Scientific Solar Monitoring System - Manual (Page 107)

95
Directional response 5 W m -2
for beam radiation
Quartz dom es Infrasil II
B 2.5 Carter-Scott Middleton EP09 Pyranom eter
The EP09 sensor has an upwards facing black receiver disk with a radial heat conduction path for rapid
response. An identical (reference) disk faces into the instrum ent body. The tem perature difference between
the disks is a direct function of the intensity of radiation absorbed by the receiver disk. The disk tem perature
is precisely determ ined with m iniature thin-film Platinum Resistance Elem ents which give the instrum ent
exceptional linearity and stability. Zero offset and signal gain can be externally trim m ed via access holes
in the base.
Specifications
Response Tim e < 10s
tim e for 95% response
Zero off-set
a) response to 200 W m
+ 6 W m -2 -2
net therm al radiation (Ventilated)
b) response to 5 C/hour change
< 2 W m o -2
in am bient tem perature
Non-stability < -0.6 %
Percentage change in
responsivity per year
Non-linearity < ± 0.25 %
percentage deviation from the
responsivity at 500 W m due
-2
to change in irradiance
within 100 W m to 1000 W m
-2 -2
Directional response for
beam radiation from 0 to 85
< ± 10 W m o -2
Spectral Selectivity +0.5 %, -1.5 %
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
Tilt response < ± 0.1 %
percentage deviation from the
responsivity at 00 tilt (horizontal)
due to change in tilt from 0° to 90°
at 1000 W m irradiance
-2
Tem perature response < 1 %
percentage deviation due to change
in am bient tem perature within an
interval of 50 C
o
Field of view 2 B sr
Irradiance 0 - 2000 W m -2
Spectral range 300 - 3000 nm (nom inal)