Kipp&Zonen BSRN Scientific Solar Monitoring System - Manual (Page 116)

104
Com pact size and light weight
W indow is optical sapphire for chem ical and scratch resistance
Marine-grade alum inium , hard anodised, for corrosion rsistance
The DN5 pyrheliom eter has a twin-therm opile sensor em bedded in a therm al-m ass that is isolated from
the instrum ent body. Optical geom etry, and baffling, is set by four precisely located apertures. The instrum ent
is easy to dism antle, and the window is sim ple to replace.
Specification
Response Tim e < 10s
tim e for 95% response
Zero off-set
response to 5 C/hour change
< ± 1 W m o -2
in am bient tem perature
Non-stability < ± 1%
Percentage change in
responsivity per year
Non-linearity < ± 0.5 %
100 W m to 1000 W m -2 -2
Spectral Selectivity ± 0.5 %
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 (at 1000 W m ) None -2
Tem perature response ± 1 %
percentage deviation due to change
in am bient tem perature within an
interval of 50 C (-10 to +40°C)
o
Full opening angle 5 o
Slope angle 1 o
Lim it angle 4 o
Irradiance 0 - 4000 W m -2
Spectral Range (nom inal) 200 - 5000 nm
Sensitivity (typical) 7 :V/W m (DN5) -2
1 m V/W m (DN5-E) -2
Calibration Accuracy ± 2 % (factory certificate); traceable NATA
Certificate available as extra cost option
Operating tem perature -30 to +60 C o
Output Im pedence (DN5) 45 - 50 S
Power supply requirem ent (DN5-E) 5.5 to 14.5 VDC, 6m A
Standby m ode (optional on DN5-E) Shutdown input: 2 to 14.5 V