DQRID : D140723.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
06/29/2012150006/20/20131100Incorrect
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Subject:
PVC/IMPACTOR/S1 - Reprocess: Incorrect impactor state
DataStreams:pvcaosimpactorS1.a1
Description:
The reported state of the impactor is reversed so that when the data says the state is 1um 
it is actually 10um and when it says 10um it is actually 1um.
Suggestions: 
There are 2 options to work around this problem.  
1. Since all the data is 
rever
sed it can be reversed back so that it will then be correct.
2. Another way to correct the impactor data is use the dry nephelometer pressure.  The dry nephelometer varies between 2 pressures.  The nephelometer pressure is higher when the impactor is 10um and lower when it is 1um.


There are 2 options to work around this problem.  
1. Since all the data is 
revers
ed it can be reversed back so that it will then be correct.
2. Another way to correct the 
impactor data is use the dry nephelometer pressure.  The dry nephelometer varies between 2 pressures.  The nephelometer pressure is higher when the impactor is 10um and lower when it is 1um.
Measurements:pvcaosimpactorS1.a1:
  • impactor_state
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