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Aeroqual AQM60 User Guide
Exhaust
adjustment
Afterwards replace the inlet components with care making sure there is no leak.
7.5.2. Sheath Flow Check
The sheath flow is a constant stream of air which ensures
the optics remains clean. It is important this is working
correctly to maintain the accuracy of the measurement. In
order to check the flow, a volumetric flow meter needs to be
connected between the purge flow adjuster and particle
engine as seen in the diagram.
Note 1: The flow should be approximately 1-1.5LPM
7.5.3. Leak Check
If the correct sample or sheath flow cannot be achieved,
there may be a leak in the pump module or engine. First check the entire flow system:
Remove the purge connection from the module and plug the end of the purge line
Remove the TSP head and block the PM inlet.
Connected the pressure end of a flow meter to the exhaust port of the module.
If there is no leak the flow should drop to zero.
Sample connection
(remove to check
module)
Purge connection
(remove to check
whole flow system)
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