Can you just confirm that the engineering units were calibrated as micro Einsteins per meter squared per sec?
No. Calibration units are shown in SETUP\CHANNEL under the PAR section. The PAR (photosynthetically active radiation) sensor comes to me with calibration units of (umol/(s*m**2))/uA, a calibration of intensity to sensor current output. I calculate the conversion factor from uA to SCAMP’s CR based on a math model of the circuit performance. The engineering units you ultimately see expressed by the data are (umol/(s*m**2)). This seemed a weird intensity unit to me but I guess it is useful if you are a plant chemist. I guess it makes sense since the photodiode inside the PAR sensor doesn’t see the full light spectrum but rather a shaped subset. Shaping is done by filters within the sensor. PAR is usually measured (by aquatic biologists anyway) in units of u mol photons /(m**2 s) (i.e. a rate of supply of photons). An Einstein is simply a mol of photons, so the units are correct. Q. I have a query about the circuit temperature. It seems to be reading too low. In the field today the air tem
