DQRID : D951127.4
Start DateStart TimeEnd DateEnd Time Data Quality Metric
11/14/1995144011/14/19951445Does not affect quality
more
Subject:
SGP/TWR21x/C1 - RH Offset removed
DataStreams:sgp30twr21xC1.a1, sgp1twr21xC1.a0
Description:
Since installation in September, the RH probe at the 60 meter level of the tower at the 
Central Facility has indicated more than 1% high for saturated conditions.  Therefore, the 
1% offset in the datalogger program was removed.  The offset was included to make up for 
typical line voltage losses.  Those losses may be present, but the offset of the RH probe 
itself more than makes up for them (the probe specifications would allow it to have a 
potential +/- 3% offset).  The offset was removed on November 14, 1995 between 1440 and 
1445 GMT, with no loss or corruption of data.  The corrected offset should bring the RH at 
saturated conditions to within 1% of 100% and will result in more accurate measurements 
throughout the measurement range.

Vapor pressure is correspondingly reduced slightly.
Suggestions: 
Measurements:sgp1twr21xC1.a0:
  • vap_pres
  • rh
more
sgp30twr21xC1.a1:
  • sd_vap_pres
  • sd_rh
  • rh
  • vap_pres
more

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