Accessories And Consumables - Aethlabs microAeth MA200 Operating Manual

3.4. Accessories and Consumables

MA200 Filter Tape Cartridge
MA300 / MA350 Filter Tape Cartridge
MA Flow Calibration Kit
microCyclone™ PM2.5 Size-selective inlet at 50 ml/min, 1.6 micron cut point at 100 ml/min
MA200 / MA300 / MA350 Serial data cable to bare leads cable
MA200 / MA300 / MA350 Serial data cable to USB converter cable
MA350 circular connector to DC barrel jack and USB converter cable
MA350 circular connector to bare leads cable
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4. Measurements
4.1. Particles
The microAeth MA Series instruments make real-time five wavelength optical analyses by measuring the
rate of decrease in transmitted light through the sample filter, due to continuous particle deposition on the
filter. Measurement at 880 nm is interpreted as the concentration of Black Carbon ('BC'). Measurement at
375 nm is interpreted as Ultraviolet Particulate Matter ('UVPM') indicative of woodsmoke, tobacco, and or
biomass burning. Measurements at 625 nm, 528 nm, and 470 nm wavelengths provide additional information
about the aerosol, and allow for the calculation of the angstrom exponent which can be used for source
apportionment and other atmospheric investigations.
4.2. Temperature
A temperature measurement of the sample air stream is made every Timebase. The sensor value for this
measurement is very close to both the filter sampling locations and the internal mass flowmeters. The
datastream from this sensor is representative of the internal temperature of the sample air and while it may
track changes in external air temperature, it may have a temperature offset compared with actual external
ambient air temperature due to internal heating or cooling of the instrument. This sensor value is always
recorded. In the data output, this value is recorded in the column labeled "Sample temp (C)." The accuracy of
the temperature measurement is typically ± 0.2 °C.
A temperature measurement of the internal chassis of the instrument is made every Timebase. This sensor
value is always recorded. In the data output, this value is recorded in the column labeled "Internal temp
(C)." The accuracy of the temperature measurement is typically ± 1 °C at 25 °C and typically ± 3 °C over the
temperature measurement range of -40 to +85 °C.
4.3. Relative Humidity
A relative humidity measurement of the sample air stream is made every Timebase. This sensor value is
always recorded. In the data output, this value is recorded in the column labeled "Sample RH (%)." The
accuracy of the relative humidity measurement is typically ± 1.8 %RH between 10-90 %RH at 25 °C.
A dewpoint calculation is made by the instrument every Timebase. This value is always calculated and
recorded using the temperature and relative humidity senors measurements. In the data output, this value is
recorded in the column labeled "Sample dewpoint (C)."
4.4. Altimeter/Barometer
A pressure measurement of the internal chassis of the instrument is made every Timebase. This sensor is
always recorded. In the data output, this value is recorded in the column labeled "Internal pressure (Pa)" The
accuracy of the absolute pressure measurement is typically ± 0.4 kPa at test conditions of 50 to 110 kPa over
−10 °C to 70 °C.
4.5. Accelerometer
A 3-axis acceleration measurement of the internal chassis of the instrument is made every Timebase. This
sensor is always recorded. In the data output, this value is recorded in the columns labeled "Accel X," "Accel
Y," and "Accel Z."
AethLabs AethLabs microAeth MA Series MA200, MA300, MA350 Operating Manual
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