Instrument - LI-1800 with Cosine Receptor
LI-1800 with Cosine Receptor
What is being measured:
Light intensity and wavelength dependence
Data recording software:
Data analysis software:
Raw data time resolution:
Analysis data averaging:
3 sets of 5 scans averaged
Sensitivity to temperature (and correction method, if applicable):
There is a temperature sensitivity (see the manual), but all calculations were performed at 25C
Sensitivity to relative humidity (and correction method, if applicable):
Sample preparation method:
Sample residence time (chamber to instrument) (seconds):
Length of tubing (cm):
Instrument flow rate:
Tubing inner diameter:
Chemical identification method:
Data analysis method:
Use jpl data for quantum efficiency and absorbance of no2 and h2o2 (assume the quantum efficiency of h2o2 is 1).
Based on industry calibration that is dated 3/17/2011. LI-COR no longer supports this instrument. The calibration files are no longer on the instrument, so you must ask someone for the calibration file.
Calibration drift estimate:
Uncertainty estimation method:
Place the LICOR at various locations throughout the chamber and use that to estimate a reasonable uncertainty. I found that in between the two chambers on a stool was the largest available light strength (though this may be because it was difficult to get any higher to calculate). On the ground and in a corner of the enclosure was the smallest irradiance.
Link to supplemental information:
This is in Paul's lab underneath the table on the far side from the door. Use the windows laptop and the cords on top of it. Ask Sophia Charan or John Crounse for the calibration file.