| Date: |
2021-12-09 |
| From: |
Lab - |
| To: |
Lab - |
| Title: |
Calibration |
| Notes: |
Last calibration: 2021-08-31
AGC=101 SDM= DAC1= DAC2=
Ambient P=100.5kPa, Tair=25.2C, Tdew=5.04C
Zero Air at 1100psi, AMP CA04119 524.77 at 1700 Tdewspan=20.00
CO2 zero 0.9046 -> .9048 Offset: .56ppm
CO2 span 1.0082 -> 1.0101 Offset: -1.47ppm
H2O zero 0.8399 -> .8413 Offset: 9.9ppm
H2O span 1.0133 -> 1.0349 Offset: -.46ppm
Notes: <100 psi left in the first zero air tank, but I did the zero anyways. The H2O value was climbing after I set the zeros, so I think that first tank was running out of air. I switched to a different zero air tank with psi=1700 to re-do the zero calibration. The offsets didn't change too much (<0.01 change in the calibration coefficient for CO2 Zero and H2O Zero). I then did the CO2 span and H2O span as usual.
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