Kipp&Zonen CM 4 Pyranometer - Manual (Page 28)

27
4 OPERATION
After completing the installation the pyranometer will be ready for
operation.
The irradiance value (E) can be simply computed by dividing the
output signal (U
emf
) of the pyranometer by its sensitivity (S
ensitivity
) as
shown in formula 1, or by multiplication of the voltage value with the
reciprocal of the sensitivity, often called the calibration factor. The
CM 4 pyranometer sensitivity is given in the supplied calibration
certificate.
For calculation of the solar irradiance the following formula must be
applied:
ensitivity
emf
S
U
E
=
(Formula 1)
E
= Global radiation [W/m
2
]
U
emf
= Output of pyranometer [
μV]
S
ensitivity
= Sensitivity of pyranometer [
μV/W/m 2
]
4. OPERATION