Instrument - LI-1800 with Cosine Receptor

Short name:

Full name:
LI-1800 with Cosine Receptor

What is being measured:
Light intensity and wavelength dependence

Sampling Protocol:



Instrument year :
None specified

Data recording software:

Data analysis software:

Raw data time resolution:
2 nm

Analysis data averaging:
3 sets of 5 scans averaged

Detection limit:
300-850 nm

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): :

Sampling method:

Sample preparation method:

Sample residence time (chamber to instrument) (seconds):

Length of tubing (cm):

Instrument flow rate:

Tubing inner diameter:

Tubing material:

Chemical identification method:

Data analysis method:

Quantification method:
Use jpl data for quantum efficiency and absorbance of no2 and h2o2 (assume the quantum efficiency of h2o2 is 1).

Calibration method:
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:
No estimate

Calibration schedule:

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.

Known interferences:

Link to supplemental information:

Additional notes:
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.

Measurement uncertainty:
40% (based on 7/28/20 calibration)

Measurement units: