Campbell CMP6-L, Instruction Manual, Page: 9 / 42

CMP6-L, CMP10-L, CMP11-L, and CMP21-L Pyranometers
2
3.1 Ships With
(2) Bolts for mounting from original manufacturer
(1) Sun Shield from original manufacturer
(2) Nylon washers from original manufacturer
3.2 Calibration Certificate
Each pyranometer is shipped with an instruction manual provided by Kipp &
Zonen that contains information concerning its 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
sensitivity value and serial number.
Cross check this serial number against the serial number on your
pyranometer to ensure that the given sensitivity value corresponds
to your sensor.
4. Quickstart
Appendix A, CVF3, CVF4 Heater/Ventilator, provides the
installation procedure for both ventilation units.
4.1 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 above the plane of the sensing element. It is
important to mount the pyranometer such that a shadow 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
q
. Diffuse solar radiation is less influenced by obstructions near
the horizon. For instance, an obstruction with an elevation of 5
q
over the
whole azimuth range of 360
q
decreases the downward diffuse solar radiation
by only 0.8%.
The sensor should be mounted with the cable pointing towards the nearest
magnetic pole (e.g., in the Northern Hemisphere point the cable toward the
North Pole); see Figures 4-1 to 4-4.
Note
Note