jlp02 is a solar radiation sensor that is applied in generalobservations. it measures the solar radiation received by a planesurface from a 180
introduction
o field of view angle. this , expressed in w/m2
, is called “hemispherical” solar radiation. jlp02 pyranometer canbe employed outdoors under the sun, as well as indoors withlamp-based solar simulators. its orientation depends on theapplication and may be horizontal, tilted (for plane of arrayradiation) or inverted (for reflected radiation).
jlp02 pyranometer is a very good alternative to silicon cell(photodiode-based) pyranometers, which do not comply to the iso9060 standard.
operation
using jlp02 is easy. the pyranometer can be connected directly tocommonly used data logging systems.
the irradiance in w/m2
is calculated by dividing the jlp02 output, a small voltage, by thesensitivity. this sensitivity is provided with jlp02 on itscalibration certificate.
uncertainty evaluation
the uncertainty of a measurement under outdoor conditions dependson many factors. guidelines for uncertainty evaluation according tothe “guide to expression of uncertainty in measurement” (gum) canbe found in our manuals. we provide spreadsheets to assist in theprocess of uncertainty evaluation of your measurement.
jlp02 specifications
measurand hemispherical solar radiation
iso classification second class pyranometer
calibration uncertainty < 1.8 % (k = 2)
calibration traceability to wrr
spectral range 285 to 3000 x 10-9 m
sensitivity (nominal) 15 x 10-6 v/(w/m2)
rated operating temperature -40 to +80 oc
range
temperature response < ± 3 % (-10 to +40 °c)
standard cable length 5 m
options
• longer cable, in multiples of 5 metres
• sun screen
• jlp02-li19, including read-out unit / datalogger li19
see also
• jlp02-tr with 4-20 ma transmitter
figure 3
(1) cable, (2) cable gland, (3) thermal sensor with black coating,(4) glass dome, (5) sensor body, overview of jlp02:
(6) levelling feet, (7) mounting hole, (8) bubble level
use as sunshine duration sensor
wmo has approved the “pyranometric method” to calculate sunshineduration from pyranometer measurements in wmo-no. 8, guide tometeorological instruments and methods of observation. this impliesthat jlp02 may be used, in combination with appropriate software,to estimate sunshine duration. this is much more cost-effectivethan using a dedicated sunshine duration sensor. ask for ourapplication note.
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