Table 7-3: Spectral errors for PPFD and YPFD measurements
Radiation source (error calculated
relative to sun, clear sky)
PPFD error [%]
Green LED
(524 nm peak, 30 nm full-width half-maximum)
5.2
Red LED
(635 nm peak, 20 nm full-width half-maximum)
0.2
Red LED
(668 nm peak, 20 nm full-width half-maximum)
–1.9
Red, blue LED mixture (84% red, 16% blue)
–1.2
Red, white LED mixture (79% red, 21% white)
–0.8
Cool white fluorescent LED
2.2
Quantum sensors can be a very practical means of measuring PPFD and YPFD from multiple
radiation sources, but spectral errors must be considered. The spectral errors in the table above
can be used as correction factors for individual radiation sources.
8. Troubleshooting,
maintenance, and calibration
NOTE:
All factory repairs and recalibrations require a returned material authorization (RMA) number
and completion of the “Declaration of Hazardous Material and Decontamination” form. Refer
to the
page at the back of this document for more information.
8.1 Troubleshooting
Symptom: –9999 or NAN or radiation values around 0
1. Check that the sensor is wired to the single-ended terminal specified by the measurement
instruction.
2. Verify that the range code is correct for the data logger type.
CS310 Quantum Sensor
12
