7B
Kipp &
Zonen
14
ALBEDOMETERS
CM 14 complies with the highest level of the
standard classification. CM 7B complies with the
second highest level, first class.
The albedometer CM 7B is constructed around two
CM 6B's and the CM 14 around two CM 11 sensors.
Both are rotationally symmetrical beneath K5 glass
domes.
CM 7B / CM 14
For measuring net global radiation
There are two operating models for an albedometer:
1. Net global radiation is measured with the
sensors connected in anti-series.
2. Separate recordings of the outputs and a subsequent measurement of the ratio of one output
to the other yields the albedo calculation.
Suitable for measuring global radiation and/or
albedo over many differing types of surface.
An albedometer can be used together with a netpyrgeometer to establish net-radiation.
Dimensions
Ø150
Specifications
CM 14
CM 7B
Spectral range
(50 % points)
305 to 2800 nm
305 to 2800 nm
Sensitivity
4 ... 6 µV/W/m2
9 ... 15 µV/W/m2
Impedance
700 ... 1500 Ω
70 ... 100 Ω
Response time (95%)
12 s
18 s
Non linearity
(0 - 1000 W/m2)
± 0.6 %
± 1.5 %
Tilt error
(at 1000 W/m2)
± 0.25 %
±1 %
Operating
temperature
-40 ºC to 80 ºC
-40 ºC to 80 ºC
Temp. dependence
of sensitivity
±1%
±2%
(-10 ºC to +40 ºC) (-10 ºC to +40 ºC)
Maximum irradiance
4000 W/m2
2000 W/m2
2
± 20 W/m2
Directional error
(at 1000 W/m2)
± 10 W/m
Weight, including rod 1.9 kg
1.9 kg
Cable length
10 m
10 m
Required for
data acquisition
2 mV channels
2 mV channels
Overall classification
ISO secondary
standard
ISO first class
70
Ø50
Applications
Generally, CM 14 can be recommended for
scientific applications, for which accuracy needs to
be according to the highest standards. CM 7B is
recommended
for
routine
meteorological
applications in which the accuracy is not the most
important issue.
Ø132
Solar & Atmospheric Science
www.kippzonen.com
Kipp & Zonen B.V.
P.O. Box 507 2600 AM
Delft, The Netherlands
T +31 (0)15 2698 000
F +31 (0)15 2620 351
E [email protected]
4414-W391-41
114
A white screen prevents the body of the
albedometer from heating up. The conical lower
screen, preventing illumination of the lower glass
dome at sunrise and sunset. The albedometers are
equipped with a rod for attachment to a mast.
A drying cartridge keeps the interior free from
humidity. All albedometers are supplied with a
calibration certificate.