CMP6, CMP10, CMP11, and CMP21 Pyranometers
7
Heating power:
5.5 W
Heater induced offset:
<1 W
•
m
–2
(with CMP10/CMP11
pyranometer)
Weight without cable:
1.6 kg (3.5 lb)
Height:
12.95 cm (5.1 in)
Length:
35.5 cm (14.0 in)
Width:
23.0 cm (9.1 in)
EU Declaration of
Conformity:
View at:
7. Installation
If you are programming the data logger with
Short Cut
(p. 11)
(p. 13)
.
Short Cut
does this work for
, for a tutorial.
7.1 Siting
The pyranometer is usually installed horizontally for global horizontal
measurements. However, the pyranometer can be installed at any angle for
POA measurements and in the inverted position for reflected measurements. In
all cases it will measure the solar flux incident on the sensor surface.
Site the pyranometer to allow easy access for maintenance while ideally
avoiding any obstructions or reflections above the plane of the sensing element.
It is important to mount the pyranometer such that a shadow or reflection will
not be cast on it at any time.
If this is not possible, try to choose a site where any obstruction over the
azimuth range between earliest sunrise and latest sunset has an elevation not
exceeding 5°. Diffuse solar radiation is less influenced by obstructions near the
horizon. For instance, an obstruction with an elevation of 5° over the whole
azimuth range of 360° decreases the downward diffuse solar radiation by only
0.8%.
The sensor should be mounted with the cable pointing towards the nearest
magnetic pole. For example, in the Northern Hemisphere, point the cable
toward the North Pole (FIGURE
through FIGURE
).
(p. C-1)
, provides the mounting
information for the CVF4 ventilation unit.
NOTE
