METER ATMOS 41W, Руководство пользователя

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ATMOS 41W
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
300 400 500 600 700 800 900 1000 1100 1200
Figure 13 Spectral response estimate of Apogee silicon-cell pyranometers
Spectral response was estimated by multiplying the spectral response of the photodiode,
diffuser, and adhesive. Spectral response measurements of diffuser and adhesive were
made with a spectrometer, and spectral response data for the photodiode were obtained
from the manufacturer.
Leveling the ATMOS 41W is particularly important for accurate solar radiation
measurements. Out of level, the pyranometer will overestimate some portions of the day
while underestimating others. Ensure accurate solar radiation measurements by carefully
leveling the ATMOS 41W at installation (
Table 1 ). Bird droppings and other soiling of the
domed sensor surface will cause serious errors in pyranometer measurements. Check the
sensor regularly to make sure it is clean, and check data often to identify possible problems.
Isopropyl (rubbing) alcohol and a cotton swab work well for cleaning the sensor area
(
Section 5.4 ). Microfiber bags work well, too.
IMPORTANT
Do NOT use an abrasive cloth on the sensor surface, as it will scratch which will lead to artificially low
pyranometer measurements.
The pyranometer is factory calibrated and the sensor-specific calibration value can be
found on the interior of the funnel. This factor has already been added into the ATMOS 41W
so there is no need to do anything with it. In the event that this value is needed, it can
be found by taking the funnel off the base and checking underneath. Follow the steps in
Section 3.2.2.1 to remove the funnel.