| Date: |
2025-01-28 |
| From: |
Lab - |
| To: |
Lab - |
| Title: |
Calibration |
| Notes: |
Last calibration: 2024-10-22
AGC=99.0 SDM= DAC1= DAC2=
AIU sn AIU-1866, Presure A0=58.31, A1=15.48
Ambient P=100.8kPa, Tair=21.1C, Tdew=6.72C
Zero Air at 800psi, AMP FB04319 514.07 at 300 Tdewspan=16.00
CO2 zero 0.9089 -> .9083 Offset: -2.75ppm
CO2 span 0.9962 -> .9983 Offset: -1.45ppm
H2O zero 0.8476 -> .8498 Offset: 15.4ppm
H2O span 0.9936 -> .97 Offset: .53ppm
Notes: Set dew point generator to 20.00C initially which led to a dew point reading of ~20.5C, seemed like a big offset. I thought the set point was too close to the room temp (then at 23.4C), so I reset the generator to 16.00C. While it stabilized, I saved the config file w/ CO2 zero/span and H2O zero only and started calibrating the zero for the next 7500A in the queue. After coming back to this sensor and reloading the partial config file, the H2O dew point was still ~0.5C above the set point of 16.00C so I decided the H2O span was just that far off.
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