| Date: |
2021-09-21 |
| From: |
Lab - |
| To: |
Lab - |
| Title: |
Calibration |
| Notes: |
Last calibration: 2021-05-25
AGC=98 SDM= DAC1= DAC2=
Ambient P=100.3kPa, Tair=26.6C, Tdew=11.3C
Zero Air at 1700psi, AMP CA04119 524.77 at 1700 Tdewspan=20.00
CO2 zero 0.9966 -> .9667 Offset: .29ppm
CO2 span 1.0137 -> 1.0145 Offset: -.44ppm
H2O zero 0.8206 -> .8224 Offset: 10.9ppm
H2O span 1.0266 -> 1.0228 Offset: .09ppm
Notes: Calibrated zero and CO2 span on 9/20. There was an issue with the dew point generator where it was producing a dewpoint ~16C when the temp switch was set to 20.00C. I calibrated the H2O span the next day on 9/21. We fixed the problem by adding more water in the condenser block on the back of the machine. The water level looked ok while the cap was on and the machine was running, but once I turned the machine off and took the cap off, the water level dropped to below the "Min" line. After I added water and turned it back on, the dewpoint generator got to a reasonable dewpoint and it seemed stable.
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