DQRID : D080826.3
Start DateStart TimeEnd DateEnd Time
08/14/2008020008/18/20080545
more
Subject:
TWP/SKYRAD/C1 - PIR2 ventilator fan failure
DataStreams:twpskyrad20sC1.a0, twpskyrad60sC1.b1
Description:
During the time range specified the PIR2 output is questionable due to ventilator fan 
failure. Although the PIR is temperature compensated, data review indicates that the PIR2 
didn't compare as well with PIR1. Typical differences during full sun are approximately 10 
w/m2. During this time period differences of 10-14 W/m2 were noted.
Suggestions: 
Use data with caution or use only PIR1 during this time period
Measurements:twpskyrad60sC1.b1:
  • Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Standard Deviation(down_long_hemisp2_std)
  • Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2(down_long_hemisp2)
  • Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Minima(down_long_hemisp2_min)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Pyrgeometer2(inst_down_long_hemisp2_case_temp)
  • Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Maxima(down_long_hemisp2_max)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Pyrgeometer2(inst_down_long_hemisp2_dome_temp)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Pyrgeometer2(inst_down_long_hemisp2_tp)
more
twpskyrad20sC1.a0:
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Pyrgeometer2(inst_down_long_hemisp2_case_resist)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Pyrgeometer2(inst_down_long_hemisp2_tp)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Pyrgeometer2(inst_down_long_hemisp2_dome_resist)
more

Close this window