Blog from August, 2013

  File Modified
Microsoft Excel Spreadsheet PostTRHcalinfo.xlsx Aug 30, 2013 by Steven Semmer

The TRH sensors were run through the calibration lab after SCP. Temperatures were checked over the range of -20C to 30C. RH was checked over the range of 10% to 90% at a temperature of 7C. The table below presents the mean error, Sensor - Ref, and the minimum and maximum error.

For humidity, in the cases where the range of the error is large, the errors typically increase systematically from the smallest errors around 10% RH to the largest errors around 90% RH.

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I added new "slope" coefficients to the Rpile_in.dat and Rpile_out.dat cal files to change their calibration coefficients from those measured in March 2011 in the NOAA blackbody to those determined by comparison (March 1-April 1, 2013) to two EOL CG4s calibrated at NREL  in August 2012 and traceable to the World Infrared Standards Group (WISG) at the World Radiation Center in Davos, Switzerland.

Rpile_in (SN 100225) changed from 11.28 uV per W/m^2 to 11.12 uV per W/m^2; cal file slope = 1.014

Rpile_out (SN 100226) changed from 11.81 uV per W/m^2 to 10.76 uV per W/m^2; cal file slope = 1.005