sparkfun
Strange behavior on results of common lamps and comparing with Sekonic
Hi. I've been trying to make the sensor work, tried 2 libraries, many tests, comparison with Sekonic C-800, and this is the spectrum I get when an incandescent lamp shines on the diffuser (I previously checked that it just attenuates a bit the same way in every wavelength) and then to the sensor, which is close.
I also tried with other lamps, and they work better, it's only when it should be very little amplitude that there is some more, but it could be light from the side of the box.
I also uploaded the same firmware (of the sensor) to it, but nothing really changed. I'm sure it uploaded because the program read the data that was sent as well. I'm waiting for Osram to respond with the firmwares to try once again.
This is the LED lamp I also test on. Just the channel 9 is very far away from the point it should be.
(Orange is what the theory said using Sekonic C-800, and blue is what I measured).
Does anyone know what could be? If I try to manually calibrate and put gains outside of the library, it's impossible to obtain a reasonable calibration, because one channel requires gain for one lamp, and attenuation for the other lamp, few channels require both attenuation or gain (which is doable).
Thank you in advance for your attention.
Hi, Could you please provide the code you use to obtain these values? What happens to your value 9 is hard to say could be noise could be a led somewhere. The Sensor has 18 channels total you show 14 could you label channels with what nm they are? What kind of diffuser are you using? Are you using a window of some sort? Is there a reflecting material nearby that happens to reflect channel 9 type light?
