| Date: |
2023-12-01 |
| From: |
Lab - none |
| To: |
Lab - none |
| Title: |
Calibration |
| Notes: |
Last calibration: 2023-08-22
Zero Air at ???psi, AMP CA04119 4223.8 ppb CH4 at ???psi
CO2 zero Offset: -0.024ppm
H2O zero Offset: -10.52ppm
CH4 zero Offset: 0.129ppb
CH4 span Offset: -1ppb
Notes: Calibration in the lab before Kuno's field campaign next week. Ran zero and span gases at our usual flow rate of 2 SCFH and plumbed the system with the recommended 30cm vent before the air inlet to vent excess air pressure and to prevent diffusion of ambient air into the gas stream. I waited until the slope of H2O was <0.002ppm to set the zero. I waited until the slope of CH4 was <0.002ppb to set the span. Plan 45min+ for H2O zero to stabilize. I forgot to write down the exact CH4 span offset, but I saved a screenshot and estimated the offset based on the graph. |
| Entered by: |
Daphne Szutu |
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