| Date: |
2025-01-17 |
| From: |
Lab - none |
| To: |
Loaned - none |
| Title: |
Calibration |
| Notes: |
Last calibration: 2024-09-03
AGC=103 SDM= DAC1= DAC2=
AIU sn AIU-1866, Presure A0=58.31, A1=15.48
Ambient P=101.2kPa, Tair=19.1C, Tdew=7.6C
Zero Air at 850psi, AMP FB04319 514.07 at 300 Tdewspan=18.00
CO2 zero 0.9026 -> .9030 Offset: 1.92ppm
CO2 span 1.0162 -> 1.0214 Offset: -3.77ppm
H2O zero 0.8716 -> .874 Offset: 17.1ppm
H2O span 1.0188 -> 1.0188 Offset: 0ppm
Notes: Used 514.0 as CO2 span point in the software. I didn't end up setting the H2O span point because I wasn't happy with the stabilization. I originally set the dew point at 20.00 C, which didn't stabilize because the room temperature was around 19 C. Then I tried to set the dew point generator to 16.00 C, but the sensor was reading consistently around 18 C (handheld Vaisala dewpoint reading ~17 C). Then I set the dewpoint generator to 18.00 C, and the sensor drifted 18->18.65->18.54->18.5>18.65. I plugged in another 7500A and it was also reading a dew point ~18 C. I'll calibrate more 7500As and see how they respond to the dewpoint generator. Installed on the BWW tower with a new 7550 temperature sensor. I also confirmed the HMP fan was working.
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