DQRID : D141211.1
Start DateStart TimeEnd DateEnd Time
05/22/2007220010/23/20071515
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Subject:
SGP/CCN/C1 - Incorrect temperature gains or settings
DataStreams:sgpaosccnavgC1.c1, sgpaosccn100C1.a1, sgpaosccnavgC1.c2, sgpaosccnC1.a1, sgpaosccnC1.00
Description:
New software was installed with instrument and temperature gains didn't transfer 
correctly. Super saturation values are incorrect and instrument tended to overheat in an attempt 
to reach set point values.
Suggestions: 
Do not use data
Measurements:sgpaosccnC1.a1:
  • First stage monitor voltage(CCN_FirstStageMonitorVoltage)
  • CCN Propotional valve voltage(CCN_ProportionalValveVoltage)
  • AOS CCN sample saturation setpoint value reported by instrument(CCN_ss_set)
  • AOS CCN standard deviation of difference (CCN_T_TEM1 - CCN_T_TEC3)(CCN_dT_TEC3_TEC1_StdDev)
  • AOS CCN temperature of sample air entering the column(CCN_T_sample)
  • AOS CCN sample pressure(CCN_P_sample)
  • AOS CCN volumetric flowrate of sample air(CCN_Q_sample)
  • AOS CCN number concentration by bin(N_CCN_dN)
  • 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)
  • CCN temperature gradient(CCN_Temperature_Gradient)
  • Bin number of lowest channel of OPC include in summation of N_CCN(N_CCN_bin_number)
  • AOS CCN temperature at top of column(CCN_T_TEC1)
  • AOS CCN temperature at middle of column(CCN_T_TEC2)
  • AOS CCN temperature at bottom of column(CCN_T_TEC3)
  • Cloud condensation nuclei number density(N_CCN)
  • AOS CCN sample supersaturation calculated by model)(CCN_ss_calc)
  • AOS CCN temperature of the optical particle counter(CCN_T_OPC)
  • AOS CCN OPC laser current(CCN_laser_current)
  • AOS CCN volumetric flowrate of sheath air(CCN_Q_sheath)
  • AOS CCN temperature of sample air at entrance to instrument(CCN_T_inlet)
  • Size of upper limit of each CCN bin(CCN_UpperSizeLimit)
  • AOS CCN temperature of the nafion humidifier(CCN_T_nafion)
more
sgpaosccnC1.00:
  • (Raw data stream - documentation not supported)
more
sgpaosccn100C1.a1:
  • AOS CCN temperature of the nafion humidifier(CCN_T_nafion)
  • Temperature difference between CCN_t_set_TEC3 and CCN_t_set_TEC1(CCN_temperature_gradient)
  • AOS CCN temperature of sample air entering the column(CCN_T_sample)
  • AOS CCN super saturation (calculated)(CCN_super_saturation_calculated)
  • First stage monitor voltage(CCN_first_stage_monitor_voltage)
  • AOS CCN number concentration by bin(N_CCN_dN)
  • AOS CCN sample pressure(CCN_P_sample)
  • Bin number of lowest channel of OPC include in summation of N_CCN(N_CCN_bin_number)
  • AOS CCN (read) temperature at bottom of column(CCN_t_read_TEC3)
  • AOS CCN observed temperature at middle of column(CCN_t_read_TEC2)
  • AOS CCN observed temperature at top of column(CCN_t_read_TEC1)
  • 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 temperature of sample air at entrance to instrument(CCN_T_inlet)
  • AOS CCN sample saturation setpoint value reported by instrument(CCN_ss_set)
  • Cloud condensation nuclei number density(N_CCN)
  • Standard deviation of CCN temperature gradient (CCN_t_read_TEC3 -
    CCN_t_read_TEC1)(CCN_temperature_std)
  • AOS CCN volumetric flowrate of sample air(CCN_Q_sample)
  • CCN Proportional valve voltage(CCN_proportional_valve_voltage)
  • AOS CCN volumetric flowrate of sheath air(CCN_Q_sheath)
  • AOS CCN OPC laser current(CCN_laser_current)
  • AOS CCN temperature of the optical particle counter(CCN_T_OPC)
more
sgpaosccnavgC1.c2:
  • AOS CCN number concentration by bin(N_CCN_dN)
  • Cloud condensation nuclei number density(N_CCN)
  • Standard deviation of number concentration of CCN(N_CCN_std)
  • Condensation particle concentration number(N_CPC)
  • Sample supersaturation calculated via Lance/Rose method(supersaturation_calculated)
  • Standard deviation of measured temperature difference between top and bottom of
    column(column_temperature_gradient_measured_std)
  • Supersaturation set point(supersaturation_setpoint)
  • Size bins for CCN droplet count(droplet_size)
  • Gradient between column top and bottom temperature settings(column_temperature_gradient_setting)
  • Standard deviation of Condensation Particle Concentration Number(N_CPC_std)
  • Measured temperature difference between top and bottom of column(column_temperature_gradient_measured)
more
sgpaosccnavgC1.c1:
  • Standard deviation of Condensation Particle Concentration Number(N_CPC_std)
  • Gradient between column top and bottom temperature settings(column_temperature_gradient_setting)
  • Supersaturation set point(supersaturation_setpoint)
  • Standard deviation of number concentration of CCN(N_CCN_std)
  • Standard deviation of measured temperature difference between top and bottom of
    column(column_temperature_gradient_measured_std)
  • AOS CCN number concentration by bin(N_CCN_dN)
  • Measured temperature difference between top and bottom of column(column_temperature_gradient_measured)
  • Cloud condensation nuclei number density(N_CCN)
  • Sample supersaturation calculated via Lance/Rose method(supersaturation_calculated)
  • Condensation particle concentration number(N_CPC)
  • Size bins for CCN droplet count(droplet_size)
more

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