DQRID : D170202.21
Start DateStart TimeEnd DateEnd Time Data Quality Metric
01/28/2017065602/01/20171159Incorrect
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Subject:
ASI/CPC/M1 - Instrument Thermistor Problem
DataStreams:asiaoscpcuM1.00, asiaoscpcuM1.b1, asiaoscpcuM1.a1
Description:
The thermistor on the CPCU 3776 malfunctioned during this time. Particle concentrations 
went very high, likely due to homogeneous nucleation of butanol vapor. The thermistor was 
changed and verified to be correct with a thermocouple.
Suggestions: 
Do not use data during this time period.
Measurements:asiaoscpcuM1.b1:
  • ambient_pressure
  • condensation_temp
  • orifice_pressure
  • saturation_temp
  • concentration
  • optics_temp
  • fraction_full
  • nozzle_pressure
  • liquid_level
  • cabinet_temp
  • aerosol_flow
  • laser_current
more
asiaoscpcuM1.a1:
  • dilution_valve_position
  • cabinet_temp
  • liquid_level
  • optics_temp
  • aerosol_flow
  • nozzle_pressure
  • fraction_full
  • dilution_flow_setpoint
  • condensation_temp
  • orifice_pressure
  • laser_current
  • ambient_pressure
  • saturation_temp
  • dilution_flow_reading
  • concentration
more
asiaoscpcuM1.00:
  • Raw data stream - documentation not supported
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