LPPYRA13
- 5 -
V2.3
Fig. 2.2: : percentage change of LPPYRA13 pyranometer sensitivity in the
temperature range -20…50 °C compared to the sensitivity at 20 °C
The shadow ring prevents the direct solar radiation to reach the sensor the whole day
long, so that only the diffuse solar radiation will be measured. Because the elevation
of the sun changes day by day, it is necessary to change the height of the shad-
ow ring at least every two days.
To prevent internal condensation forming on the internal side of the dome under cer-
tain climatic conditions, silica gel tablets are inserted inside the pyranometer to ab-
sorb humidity.
Fig. 2.3: scheme of principle LPPYRA13 (version with mV output)
Thermopile
Surge
Protector
Connector pins
Housing
To cable shield
Temperature (°C)
%
c
ha
ng
e of
s
en
sitiv
ity
Thermopile
Temperature
compensation
Summary of Contents for Delta OHM LPPYRA13
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