DQRID : D100715.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/02/2010180007/13/20101600Incorrect
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Subject:
GRW/AOS/M1 - CCN Detector misalignment
DataStreams:grwaosccnM1.a1
Description:
The CCN signal was unusually low about 100 particles/cc. The %SS growth curves were 
asymmetrical. Upon consultation with the manufacturer, DMT, it was predicted that the OPC 
detector was clogged or misaligned. I had the tech, Carlos, remove the detector and ship it 
back to Boulder. The detector was cleaned. An o-ring for a lens wasn't properly seated. The 
OPC was sent back to GRW and installed. Data looks normal after the reinstallation on 
July 13th.
Suggestions: 
Don't use the data during this time.
Measurements:grwaosccnM1.a1:
  • N_CCN
  • N_CCN_bin_number
  • N_CCN_dN
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