Data Quality Reports for Session: 138228 User: dream1kuan Completed: 10/21/2011

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D081022.9FKB/MET/M1 - Wind Speed data contain offset due to induced voltagefkbmetM1.b1


DQRID : D081022.9
Start DateStart TimeEnd DateEnd Time
03/01/2007000001/01/20082359
Subject:
FKB/MET/M1 - Wind Speed data contain offset due to induced voltage
DataStreams:fkbmetM1.b1
Description:
The marine model of the RM Young wind sensor needs twisted pair shielded cable.  The 
manufacturer did not originally supply the pigtail with twisted pair shielded cable.  Use of 
twisted pair shielded cable for the rest of the cable run to the logger was also not 
specified.  This caused an induced voltage in the wind speed line from the wind direction 
excitation.  The induced voltage varied from sensor to sensor and probably changed anytime 
the cable was replaced or parts of the wind sensor were repaired or replaced. The induced 
voltage has been seen to vary from 0.15 m/s to as much as 1.08 m/s.
Measurements:fkbmetM1.b1:
  • Wind speed vector mean(wspd_vec_mean)
  • Wind speed, lower, 1-min avg(wspd_arith_mean)

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