Installation Of The Instrument In A Measurement Station - MAGEE Scientific Aethalometer AE33 User Manual

Aethalometer
Model AE33

7.4 Installation of the instrument in a measurement station

a) The Aethalometer can be connected to a common sample air inlet manifold together with
other instruments. Make sure that all other instruments draw constant flow and do not inject
"reverse flow" into the manifold at any time. Make sure that the gauge pressure in the
manifold is neither greater nor lesser than the ambient atmospheric pressure by more than
0.01 atm. The Aethalometer draws a constant air flow rate during all phases of measurement,
tape advance and clean air tests.
b) The Aethalometer may draw from its own dedicated air sample inlet connection. This inlet
must be protected from rain.
c) Size-selective inlets, such as PM1, PM2.5, and PM10 cyclones or impactors, may be used to
exclude aerosol particles of large aerodynamic diameters.
d) The insect and water trap should always be installed in the sample inlet line, at a point close
to the instrument and clearly visible. This will prevent the entry of contamination (which will
compromise the data); or entry of water (either rain or condensation), which can lead to
serious damage of the flow sensors.
e) If the indoor environment of the measurement station is air-conditioned, the inlet tubing
lines should be insulated to avoid the condensation of water. If the sample stream dew point is
high, we strongly recommend the use of our Sample Stream Dryer (PN M5610) to remove
water vapor from the sample air stream.
ATTENTION: Any water intake into the instrument can permanently damage the
flow sensors. Damage due to water intake is not covered by the warranty!
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User's manual – Ver. 1.55 July 2017 40/146