Data Quality Reports for Session: 186022 User: cirinog1 Completed: 06/06/2017

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected Data Quality Metric
D141017.4MAO/CPC/S1 - CPCU under-countingmaoaoscpcuS1.b1Incorrect


DQRID : D141017.4
Start DateStart TimeEnd DateEnd Time Data Quality Metric
02/04/2014170003/25/20141800Incorrect
09/12/2014122310/01/20141600Incorrect
10/30/2014163011/04/20141600Incorrect
08/25/2014020008/25/20142330Incorrect
08/14/2014230008/19/20142200Incorrect
08/20/2014100008/22/20141915Incorrect
05/18/2014180007/22/20141800Incorrect
01/24/2014113002/03/20140100Incorrect
Subject:
MAO/CPC/S1 - CPCU under-counting
DataStreams:maoaoscpcuS1.b1
Description:
Under normal operating conditions, the CPCU measured number concentration should be equal 
to or greater than the CPCF measured number concentration. The fact that the CPCU is 
under-counting with respect to the CPCF during this time period strongly suggests that there 
is a clog in the sampling capillary, resulting in a lower than expected sample flow rate 
and therefore a lower than expected measured number concentration.
Measurements:maoaoscpcuS1.b1:
  • Aerosol concentration averaged over times to match N_CCN(concentration)

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