DQRID : D000801.5
Start DateStart TimeEnd DateEnd Time
06/02/2000184207/03/20001833
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Subject:
SGP/AOS/C1 - Nephelometer failure
DataStreams:sgpaosC1.a0, sgpaosauxC1.a0
Description:
An inexperienced AOS technician inadvertently closed off the flow to the dual-nephelometer 
humidograph system during a Friday Preventative Maintenance.  This resulted in liquid 
water getting into the humidified nephelometer.  Flow was restored to the system on Monday, 
but the nephelometers were producing strange data.  A number of tests were performed 
over the next few days to remotely troubleshoot the situation, to no avail.  Eventually, the 
decision was made to pull both nephelometers and return them to Boulder for repair.  
This DQR refers only to the humidified nephelometer, which was out of service for the entire 
period from 000602 through 000703.
Suggestions: 
Measurements:sgpaosauxC1.a0:  
  • TSI High RH Neph. 450 nm back scattering coefficient for zero gas(BluBScatZero_HRH)
  • TSI High RH Neph. 550 nm rayleigh scattering coefficient for zero gas(GrnRScatZero_HRH)
  • TSI High RH Neph. 700 nm total scattering coefficient for cal. gas(RedTScatSpn_HRH)
  • TSI High RH Neph. 450 nm total scattering coefficient for cal. gas(BluTScatSpn_HRH)
  • TSI High RH Neph. 550 nm total scattering coefficient for zero gas(GrnTScatZero_HRH)
  • TSI High RH Neph. 700 nm back scattering coefficient for zero gas(RedBScatZero_HRH)
  • TSI High RH Neph. 700 nm total scattering coefficient for zero gas(RedTScatZero_HRH)
  • TSI High RH Neph. 700 nm back scattering coefficient for cal. gas(RedBScatSpn_HRH)
  • TSI High RH Neph. 450 nm total scattering coefficient for zero gas(BluTScatZero_HRH)
  • CLAP reference signal(BapRef)
  • TSI High RH Neph. 450 nm rayleigh scattering coefficient for zero gas(BluRScatZero_HRH)
  • TSI High RH Neph. 550 nm back scattering coefficient for cal. gas(GrnBScatSpn_HRH)
  • CLAP Signal(BapSignal)
  • TSI High RH Neph. 550 nm back scattering coefficient for zero gas(GrnBScatZero_HRH)
  • TSI High RH Neph. 550 nm total scattering coefficient for cal. gas(GrnTScatSpn_HRH)
  • TSI High RH Neph. 700 nm rayleigh scattering coefficient for zero gas(RedRScatZero_HRH)
  • TSI High RH Neph. 450 nm back scattering coefficient for cal. gas(BluBScatSpn_HRH)
more

sgpaosC1.a0:  
  • TSI High RH Neph. 450 nm total scat. coef. at 1 um(BluTScatCoef_1um_HRH)
  • TSI High RH Neph. 700 nm backscat. coef. at 10 um(RedBScatCoef_10um_HRH)
  • TSI High RH Neph. 700 nm backscat. coef. at 1 um(RedBScatCoef_1um_HRH)
  • 1 um Absorption coefficient(Bap_I_1um)
  • TSI High RH Neph. 700 nm total scat. coef. at 10 um(RedTScatCoef_10um_HRH)
  • TSI High RH Neph. 550 nm backscat. coef. at 10 um(GrnBScatCoef_10um_HRH)
  • TSI High RH Neph. 550 nm backscat. coef. at 1 um(GrnBScatCoef_1um_HRH)
  • TSI High RH Neph. 450 nm total scat. coef. at 10 um(BluTScatCoef_10um_HRH)
  • TSI High RH Neph. 550 nm total scat. coef. at 1 um(GrnTScatCoef_1um_HRH)
  • TSI High RH Neph. 700 nm total scat. coef. at 1 um(RedTScatCoef_1um_HRH)
  • TSI High RH Neph. 450 nm backscat. coef. at 1 um(BluBScatCoef_1um_HRH)
  • 10 um Absorption coefficient(Bap_I_10um)
  • TSI High RH Neph. 550 nm total scat. coef. at 10 um(GrnTScatCoef_10um_HRH)
  • TSI High RH Neph. 450 nm backscat. coef. at 10 um(BluBScatCoef_10um_HRH)
more


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