DQRID : D151019.5
Start DateStart TimeEnd DateEnd Time
10/04/2015215910/13/20152002
more
Subject:
MAO/ACSM/S1 - critical orifice clog and resulting noise issues
DataStreams:maoaosacsmS1.b1, maoaosacsmS1.01, maoaosacsmS1.a1
Description:
The critical orifice clogged at the beginning of the specified period and there was a 
substantial drop in the inlet pressure.  the orifice was cleaned and reinstalled, but there 
was significant instrument noise.  A second cleaning and reinstallation solved the 
problem.
Suggestions: 
Do not use the data from the specified period.
Measurements:maoaosacsmS1.b1:
  • time_in_seconds_since_volume_start(time)
  • Time offset from base_time(time_offset)
  • Mass to charge ratios of ion fragments(amus)
  • -180.0 - +180.0(alt)
  • base time in epoch(base_time)
  • Mass concentration of ammonium, ambient aerosol in air(ammonium)
  • Mass concentration of sulfate, ambient aerosol in air.(sulfate)
  • Mass concentration of nitrate, ambient aerosol in air(nitrate)
  • Quality check results on field: Mass concentration of sulfate, ambient aerosol
    in air(qc_sulfate)
  • lon(lon)
  • Quality check results on field: Mass concentration of total organics, ambient
    aerosol in air(qc_total_organics)
  • Quality check results on field: Organic mass spectral matrix(qc_org_mx)
  • Quality check results on field: Mass concentration of nitrate, ambient aerosol
    in air(qc_nitrate)
  • Organic mass spectral error matrix(org_mx_err)
  • Mass concentration of chloride, ambient aerosol in air.(chloride)
  • Quality check results on field: Mass concentration of ammonium, ambient aerosol
    in air(qc_ammonium)
  • Quality check results on field: Organic mass spectral error matrix(qc_org_mx_err)
  • North Latitude(lat)
  • Time range for the hourly averages, in time offset from midnight(time_bounds)
  • Organic mass spectral matrix(org_mx)
  • Mass concentration of total organics, ambient aerosol in air(total_organics)
  • Quality check results on field: Mass concentration of chloride, ambient aerosol
    in air(qc_chloride)
more
maoaosacsmS1.a1:
  • Emission current(emission_current)
  • Time offset from base_time(time_offset)
  • Vaporizer(vaporizer)
  • Mass concentration of chloride, ambient aerosol in air.(chloride)
  • North Latitude(lat)
  • flow rate measured by the mass flow controller(flow_rate)
  • Inlet closed(inlet_closed)
  • Mass concentration of total organics, ambient aerosol in air(total_organics)
  • base time in epoch(base_time)
  • lon(lon)
  • time_in_seconds_since_volume_start(time)
  • Inlet open(inlet_open)
  • Mass concentration of ammonium, ambient aerosol in air(ammonium)
  • -180.0 - +180.0(alt)
  • Mass concentration of sulfate, ambient aerosol in air.(sulfate)
  • Mass concentration of nitrate, ambient aerosol in air(nitrate)
  • Time range for the hourly averages, in time offset from midnight(time_bounds)
more
maoaosacsmS1.01:
  • (Raw data stream - documentation not supported)
more

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