LP PYRA 05_1
LP PYRA 05_2LP PYRA 06_3LP PYRA 06_4

LP PYRA 05, LP PYRA 06 – Albedometers

Delta Ohm manufactures two different models of albedometers:
LP PYRA 05 is constructed starting from two 1st class pyranometers and
the LP PYRA 06 starting from two 2nd class pyranometers (according to ISO
9060 standards and to specifi cations published by the World Meteorological
Organization). An albedometer basically consists of two pyranometers, mounted
back-to-back, one looking upward (sky) and one downward (earth). The upward
pyranometer measures the incident global radiation (direct radiation + diffuse
radiation) striking the ground, while the downward one, measures the global
radiation refl ected from the ground. The outputs of the two pyranometers
electric signals can be directly sent to a data logger or to an automatic data
processor.

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Product Description

Delta Ohm manufactures two different models of albedometers:
LP PYRA 05 is constructed starting from two 1st class pyranometers and
the LP PYRA 06 starting from two 2nd class pyranometers (according to ISO
9060 standards and to specifi cations published by the World Meteorological
Organization). An albedometer basically consists of two pyranometers, mounted
back-to-back, one looking upward (sky) and one downward (earth). The upward
pyranometer measures the incident global radiation (direct radiation + diffuse
radiation) striking the ground, while the downward one, measures the global
radiation refl ected from the ground. The outputs of the two pyranometers
electric signals can be directly sent to a data logger or to an automatic data
processor. The two pyranometers which made up of the LP PYRA 05 are coupled
in order to have the same sensitivity. Albedo is the fraction of solar radiation that
is refl ected from the ground, with respect to incident radiation:
ALBEDO =
Reflected Global Radiation
Incident Global Radiation

By using albedometers, we can calculate the net radiation obtained
through the difference between incident global radiation and refl ected
global radiation.
Delta Ohm albedometers operate within 0.3 μm ÷3 μm spectral range. No power
supply is needed, as the two pyranometers generate a voltage which is usually
equal to:
10
mV
kW • m-2
Every pyranometer composing the albedometer is calibrated separately as
per the WRR (World Radiometric Reference) standard and is supplied with the
relevant Report of Calibration.
These are strong and reliable ground-based instruments, especially designed
to be used under all weather conditions. They are suitable for installation of the
fi eld.
Recommended use: climatological research, weather stations, road weather
stations, agriculture stations, etc…

Technical Specifi cation LP PYRA 05* LP PYRA 06*
Typical sensitivity 10 μV/(W/m2)
Typical Impedance 33 Ω ÷ 45 Ω
Irradiance range 0 ÷ 2000 W/m2
Viewing angle 2π sr
Spectral range 305 nm ÷ 2800 nm W/m2 (50%)
Operating Temperature -40 °C ÷ 80 °C
Weight (pyranometer only) 1.35 Kg 1.1 Kg
ISO 9060 Specifi cations
Response time (95 %) < 28 sec < 30sec
Zero off-set
3a) thermal radiation (200 Wm-2) 15 W/m2 25 W/m2
3b) temperature change 5K/h <|± 4|W/m2 <|± 6|W/m2
3a) Long term stability 1 year <|± 1.5|% <|±2.5|%
3b) Non linearity <|± 1|% <|± 2|%
3c) Cosine response <|±18|W/m2 <|±22|W/m2
3d) Spectral selectivity <|±5|% <±7|%
3e) Temperature response < 4 % < 8 %
3f) Tilt response <|±2|% <|±4|%
* All technical data, excluding weight, are referred to one of the two pyranometers
composing the albedometer.
ORDERING CODES
LP PYRA 05: Albedometer made up of two 1st Class pyranometers, according
to ISO 9060. Complete with: top shade disk and bottom shade disc, drying
cartridge with silicagel crystals, 2 silica gel cartridges, spirit level, Ø
16×500 rod for attachment to a mast, M12 8-pole connector and Report of
Calibration. Typical sensitivity 10μV/(W/m2). The connection cable has to
be ordered separately.
LP SP1: Top shade disc for albedometer LP PYRA 05 (upward pyranometer).
LP SP3: Bottom shade disk for albedometer LP PYRA 05 (downward
pyranometer).
LP SG: Drying cartridge with silicagel crystals, complete with O-ring.
LP G: Pack of 5 cartridges of silicagel.
LP PYRA 06: Albedometer made up of two 2nd Class pyranometers, according
to ISO 9060. Complete with: top shade disk and bottom shade disc, spirit
level, Ø 16×500 rod for attachment to a mast, M12 8-pole connector and
Report of Calibration. Typical sensitivity 10μW/(W/m2). The connection
cable has to be ordered separately.

CPM12 AA8.2: 8-pole M12 connector with UV resistant cable L= 2m, for LP
PYRA 05 – LP PYRA 06.
CPM12 AA8.5: 8-pole M12 connector with UV resistant cable L= 5m, for LP
PYRA 05 – LP PYRA 06.
CPM12 AA8.10 : 8-pole M12 connector with UV resistant cable L= 2m, for LP
PYRA 05 – LP PYRA 06.
HD978TR3: Configurable signal converter amplifier with 4÷20mA
(20÷4mA) output. Input measuring range -10..+60mV. Default setting
0÷20mV. Minimum measuring range 2mV. DIN rail 2-module housing.
58mmx65mmx35mm height.
HD978TR5: Wall configurable, signal converter amplifier with 4÷20mA
(20÷4mA) output. Input measuring range –10…+60mV. Default settings
0÷20mV. Minimum measuring range 2mV. Wall mouting, dimensions:
58mmx65mmx35mm height.
HD978TR4: Configurable signal converter amplifier with 0÷10 Vdc (10÷0 Vdc)
output. DIN rail 2-module housing. Input measuring range -10..+60mV.
Default setting 0÷20mV. Minimum measuring range 2mV.
HD978TR6: Wall configurable, signal converter amplifier with 0÷10 Vdc
(10÷0Vdc) output. Input measuring range –10…+60mV. Default settings
0÷20mV. Minimum measuring range

 

Download

Manuals and Brochures here.  

LPPYRA05.pdf

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