태양광
FIR 측정 시스템 - SIR 02
(SOLAR
FIR RADIATION MEASUREMENT : PYRGEOMETER)
PYRGEOMETER WITH
HEATING
SIR02 is a
sensor that can be applied for Far Infra Red (FIR) radiation observations. The
main application is in meteorological outdoor experiments. The scientific name
of this instrument is pyrgeometer. SIR02 is
heated, which improves measurement accuracy because it prevents dew
deposition.
Figure 1 SIR02 pyrgeometer: (1) heater, (2) Pt100 temperature
sensor, (3) sensor, (4) FIR window, (5) cable gland, (6) cable, standard length
5 m, (7) level, (8) screwed cable connection, (9) access for cable connection /
replacement, (10) rubber O-ring, (11) levelling feet
Figure 2 SIR02 dimensions. Standard cable length
is 5 m. Cable can be installed / replaced by the user.
INTRODUCTION
SIR02 serves to measure the FIR
radiation flux that is incident on a plane surface in W/m2. Working
completely passive, using a thermopile sensor, SIR02 generates a small output
voltage proportional to the flux between the object within the field of view,
and the SIR02 sensor. SIR02 has a spectrally flat response across the full FIR
spectrum, effectively from 4500 to 50000 nm.
A Pt100 temperature sensor is used to
estimate the sensor temperature, and makes it possible to calculate the object’s
emitted radiation or temperature (facing the sky, this is the so-called “sky
temperature”).
The instrument can directly be connected to
most commonly used datalogging systems.
SIR02 can be used for general meteorological
observations. A common application is for outdoor FIR measurements, in
combination with a pyranometer, as part of a meteorological station. This
application requires horizontal levelling; levelling feet (10) and a level (6)
are included. The SIR02 cable can easily be installed or replaced by the user.
For net-FIR measurements, see also the SNR01
net-radiometer.
SIR02 SPECIFICATIONS
General:
-
Sensitivity (nominal): 15 µV/
Wm-2
-
Temperature range: -40 to +80
oC
-
Range: -1000 to +1000
Wm-2
-
Temperature dependence: <
0.1%/°C
-
Temperature sensor: Pt100
-
Spectral
range: 4500 to 50000 nm
-
Calibration traceability: ITS
90
- Window heating offset: <15
Wm-2 @ 1000
Wm-2 solar radiation
-
Heating power: 1.6 Watt
@12VDC
OPTIONS
Additional cable length x
metres (add to 5m)
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