Equipment and Calibration History

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View history entry 5706 for Licor LI-7500A sn: 75H-2514

Date: 2022-03-03
From: Lab -
To: Lab -
Title: Calibration
Notes: Last calibration: 2022-01-11 AGC=100 SDM= DAC1= DAC2= Ambient P=99.99kPa, Tair=23.1C, Tdew=9.47C Zero Air at 925psi, AMP CA04119 524.77 at 1600 Tdewspan=20.00 CO2 zero 0.9049 -> .9044 Offset: -2.15ppm CO2 span 1.0047 -> 1.0101 Offset: -3.55ppm H2O zero 0.8391 -> .8433 Offset: 30.2ppm H2O span 1.0087 -> 1.0199 Offset: -.25ppm Notes: Large positive H2O zero. Not really sure why it's difficult to get a good calibration. Is the sensor changing that much between calibrations (even though it's just been sitting in the lab)? Or is there something inconsistent about my calibration method?
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