DQRID : D061207.3
Start DateStart TimeEnd DateEnd Time
09/04/2006015509/07/20060950
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Subject:
NIM/AOS/M1 - CCN failure
DataStreams:nimaosccnM1.a1
Description:
The tech noticed that the CCN temperature wasn't stepping correctly and that there wasn't 
much signal. He was able to find and correct the problem by 9/7.
Suggestions: 
Measurements:nimaosccnM1.a1:
  • AOS CCN OPC laser current(CCN_laser_current)
  • AOS CCN volumetric flowrate of sheath air(CCN_Q_sheath)
  • AOS CCN sample saturation setpoint value reported by instrument(CCN_ss_set)
  • AOS CCN volumetric flowrate of sample air(CCN_Q_sample)
  • AOS CCN logical value, indicating whether the instrument has reached thermal
    gradient stabilization and is within 0.4 degrees C of the set point(CCN_temp_unstable_flag)
  • AOS CCN number concentration by bin(N_CCN_dN)
  • AOS CCN sample pressure(CCN_P_sample)
  • AOS CCN temperature of sample air at entrance to instrument(CCN_T_inlet)
  • AOS CCN temperature of sample air entering the column(CCN_T_sample)
  • AOS CCN sample supersaturation calculated by model)(CCN_ss_calc)
  • Size of upper limit of each CCN bin(CCN_UpperSizeLimit)
  • Bin number of lowest channel of OPC include in summation of N_CCN(N_CCN_bin_number)
  • AOS CCN temperature of the nafion humidifier(CCN_T_nafion)
  • AOS CCN temperature at top of column(CCN_T_TEC1)
  • Cloud condensation nuclei number density(N_CCN)
  • AOS CCN temperature at middle of column(CCN_T_TEC2)
  • AOS CCN temperature at bottom of column(CCN_T_TEC3)
  • AOS CCN standard deviation of difference (CCN_T_TEM1 - CCN_T_TEC3)(CCN_dT_TEC3_TEC1_StdDev)
  • AOS CCN temperature of the optical particle counter(CCN_T_OPC)
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