MRK-D-0048 V4
Aeroqual Dust Sentry / AQS User Guide
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Replace gas sample inlet filter (AQS only)
The gas inlet filter is held inside the enclosure at the top left. This must be changed to ensure
accurate readings. The filter is disposable and can be thrown away.
The filter should be changed when it becomes dirty as shown in Figure 6-6. The frequency of filer
changes depends upon local environmental conditions.
Tools required
None
Parts required
AQS R12 (bag of 25 filters)
Service interval
Recommended
Monthly
(depends on local conditions)
See Section 6.1 for further discussion on filter change frequencies.
Do not turn off the monitor, this procedure can be done with the monitor turned on.
NOTE: It is very important to check the monitor inlet flow rate is correct after changing the filter to
ensure there are no leaks
Figure 6-6 The particle filter on the gas inlet can be easily replaced, it should be replaced when it gets
dirty as shown in the image on the right (a new filter is shown on the left, dirty filter on the right).
Measure and adjust monitor inlet flowrate and module flow rate
Maintaining a consistent flow rate is very important for ensuring accurate measurements. Leaks, or an
aging pump may lead to reduced flow. Regularly measuring the flow rate will ensure any changes to
flow rate are identified as soon as possible.
Tools required
AQM R7, Inlet flow adaptor (comes with monitor accessories box) Small
Philips head screwdriver
Parts required
None
Service interval
Recommended
Monthly
.
Online reference
training.aeroqual.com: Dust Monitor technical Training Section 4.2
Online video
YouTube Channel: Aeroqual Service and Maintenance playlist