LPPYRA-Lite
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V1.2
1
INTRODUCTION
LPPYRA-Lite pyranometer measures the irradiance on a flat surface (W/m
2
). The
measured irradiance (Global Irradiance) is the sum of direct solar irradiance and dif-
fuse irradiance.
LPPYRA-Lite is a Spectrally Flat Class C (Second Class) pyranometer in accordance
with ISO 9060:2018 and with the criteria of the WMO “Guide to Meteorological In-
struments and Methods of Observation’”.
The pyranometer is available in the following versions:
•
LPPYRA-Lite
:
PASSIVE.
The passive version can be connected to the instruments
D09847 and HD31 by using VP472 SICRAM module.
•
LPPYRA-LiteAC
: ACTIVE with 2-wire (current loop) 4..20 mA output (0…2000
W/m
2
).
The pyranometer is supplied factory calibrated. The calibration is carried out in
accordance with the ISO 9847:1992 (type IIc) standard: ”Calibration of field
pyranometers by comparison to a reference pyranometer”. The pyranometer is
calibrated by comparison with the reference sample calibrated annually at WRC (World
Radiation Center).
An optional fixing base integrating a levelling device is available as an accessory, for
installations where horizontal positioning is required.
