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MRK-D-0048 V4
Aeroqual Dust Sentry / AQS User Guide
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If the correct flow rate cannot be set then it may be required to replace the gas sample pump. The
pump is part number
AQS R10.
The pump can easily be removed from the bracket for replacement.
IMPORTANT Use fresh Tygon Tube (CS Tube 10) when re-connecting the tube back on the
pump. This is because the barbs on the pump stretch the tube.
The online training website contains details on how to replace the gas sample pump.
Replace filter on Particle Monitor or Particle Profiler
The Particle Monitor and Particle Profiler have filters which need to be replaced. Disconnect the pump
module power when replacing the filter, see Figure 6-15.and Figure 6-16.
Tools required
Large flathead screwdriver
Parts required
DS R31 (Particle Monitor) DS R32 Particle Profiler
Service Interval
Recommended
Monthly
(depends on local conditions)
See Section 6.1 for further discussion on filter change frequencies.
Online reference
training.aeroqual.com: Dust Monitor technical Training, section 5.1
Online video
YouTube Channel: Aeroqual Service and Maintenance playlist
The filters for the Particle Monitor are located inside the optical module. Use a large flat head screw
driver to unscrew the filter housing on the front panel of the optical module.
The filters for the Particle Profiler are located in a filter casing outside the optical module and within
the Particle Profiler Pump Module.
Figure 6-9 The Particle Monitor (shown on the left) requires AQS R31 and the Particle Profiler (shown on
the right) requires AQS R32
Section 6.1 discusses frequencies for changing the filters on the Particle Monitor and Particle Profiler.
However if the filters look visibly blackened they should be replaced, regardless of the time elapsed.
Figure 6-10 The AQS R31 sample filter should be replaced once the filter begins to blacken