Campbell CMP3-L, Инструкция по эксплуатации

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CMP3-L Pyranometer
1. General Description
This manual provides information for interfacing the CMP3-L Pyranometer to
various models of Campbell Scientific dataloggers. The CMP3-L is
manufactured by Kipp & Zonen and then cabled by Campbell Scientific.
Cable length is user specified.
The CMP3-L is shipped with an instruction manual provided by Kipp & Zonen
that contains information concerning the CMP3-L’s construction, spectral
sensitivity, cosine response, and a simple sensor check out procedure.
Included with the sensor and manual is a calibration certificate with the sensor
calibration constant and serial number. Cross check this serial number against
the serial number on your CMP3-L to ensure that the given calibration constant
corresponds to your sensor.
The CMP3-L pyranometer is designed for continuous outdoor use. Due to its
flat spectral sensitivity from 300 to 3000 nm, it can be used in natural sunlight,
under plant canopies, in green houses or buildings, and inverted to measure
reflected solar radiation. Two CMP3-Ls can be used in combination to
measure albedo. The CMP3-L can also be used to measure most types of
artificial light (Xenon lamps, Halogen lamps, etc.).
The CMP3-L pyranometer consists of a thermopile sensor, housing, dome, and
cable. The thermopile is coated with a black absorbent coating. The paint
absorbs the radiation and converts it to heat. The resultant temperature
difference is converted to a voltage by the copper-constantan thermopile. The
thermopile is encapsulated in the housing in such a way that it has a field of
view of 180 degrees and the angular characteristics needed to fulfill the cosine
response requirements.
2. Specifications
The CMP3-L is an ISO Second Class pyranometer. While the worst case
accuracy for daily sums given by Kipp & Zonen is +10%, the typical accuracy
is +5%.
ISO SPECIFICATIONS:
Response Time 95%: 18 seconds
Zero offset due to 200 W/m
2
thermal
radiation:
< 15 W m
-2
Zero offset due to temperature change
of 5ºK / hr:
< +4 W m
-2
Non stability (% change/year): < + 1%
Non linearity (0 to 1000 W/m
2
):
< + 2.5%
Directional error (at 80º with
1000 W/m
2
beam):
< + 20 W m
-2
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