DQRID : D120820.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
04/27/2009000009/08/20090825Incorrect
more
Subject:
GRW/AOS/M1 - CPC undercounting
DataStreams:grwnoaaaosM1.b1, grwaosM1.a1, grwnoaaaosavgM1.b1
Description:
The CPC was undercounting by about 10-20 percent relative to the CCN. After cleaning the 
CPC and replacing the butanol, the signal increased to above that of the CCN.

Increase CPC signal so that it equals the CCN signal at the maximum SS value. The 
corrected signal will represent relative and not an absolute particle concentration.
Suggestions: 
Measurements:grwnoaaaosM1.b1:
  • N_CPC_1
more
grwnoaaaosavgM1.b1:
  • N_CPC_1
more
grwaosM1.a1:
  • N_CPC_1
more

Close this window