Atmos Wiki

* Run 01: SMPS_20220314_Run01

• SMPS Setup:
  • 3775 High
  • Classifier Model: 3080
  • DMA: 3081
  • Sheath: 4.5, Aerosol: 1.5
  • Impactor Type: 0.071
  • Size Range: 11.1 nm - 523.3 nm
  • Scan Time: 120 Up, Retrace: 15
• Start Time: 19:22 UTC
• Adjusted Flow Rate Time: 19:33 UTC
• CPC Concentration: 9000 - 9300 #/cm3
• APS Peak: around 2.5µm at ~ 40-55 #/cm3
• Notes: CPC Concentration slightly going down, APS diameter peak slightly going up.

* Run 02: SMPS_20220314_Run02

• Filter changed: 47mm
• Start Time: 20:04 UTC
• CPC Starting Concentration: 7500 #/cm3
• Peak on APS not visible
• Concentrations dipped at 20:10 UTC. Looks like a loss of power.
• After investigation, fans overheated causing a loss of power. End of run.

* Run 03: SMPS_20220314_Run03

• Start Time: 21:39 UTC
• CPC Starting Concentration: 8000 #/cm3
• APS Starting Peak: ~ 3 μm at 6-8 #/cm3
• APS Pattern: Flat Spectrum. Minor peaks between 3-4 μm at 8 #/cm3
• CPC Concentration at 7000 #/cm3 5 mins into run.
• Temperature inside generator/wind tunnel 142-146 °F.

* Run 04: SMPS_20220314_Run04

• Start Time: 22:05 UTC
• CPC Starting Concentration: 5300 #/cm3
• APS Starting Pattern: Fairly flat, minor peak around 3.5 µm at 10-12 #/cm3
• APS pattern progressively more flat as run continued. Very minor peak remained around 3-4 µm.