Aeroqual AQM60, User Manual, Page: 53 / 83

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Aeroqual AQM60 User Guide
7.4. Particle Monitor
7.4.1. Sample Flow Check
A constant flow is essential to ensure the sharp cut cyclone is separating out the correct particle size to be
measured e.g. PM10 or PM2.5. To measure the flow, remove the TSP head from the inlet and connect the
volumetric flow meter to the top of the sharp cut cyclone using the adaptor supplied with the instrument.
Ensure the flow meter is on a steady surface before reading the flow rate.
Note 1: The adaptor tubing should be connected to the TOP of the volumetric flow meter (negative
flow)
Note 2: The flow should be 2.0 LPM
The PM inlet flow can be adjusted via the flow adjuster on the exhaust and purge line.

If the flow is less than 2.0 LPM then close the purge flow screw (turn clockwise) until 2.0 LPM is
achieved.

If the flow is greater than 2.0 LPM then open the purge flow screw (turn anticlockwise) until the
flow is 2.0 LPM.

If you can’t adjust the flow to 2 LPM using the purge flow screw then close (clockwise) the exhaust
flow screw until 2.0 LPM is achieved.
Afterwards replace the inlet components with care making sure there is no leak.
Exhaust
adjustment
Purge
adjustment