MRK-D-0048 V4
Aeroqual Dust Sentry / AQS User Guide
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6.5.4.1
Measure main gas inlet flow rate
Remove the white inlet fitting containing the mesh filter and attach the inlet flow adaptor.
Attach a high quality flow meter such as the Aeroqual R7 or Bios Dry Cal. See section 6.1.
Record the inlet flow rate in the Journal by making a manual user entry.
The gas inlet rate is controlled, for a description of the expected flow rate for the module see Table
12-1.
When the monitor is new, the inlet flow rate is recorded in the monitor log book which is provided from
the Aeroqual factory. The measured flow rate should be equal to the previously measured flow rate
which is recorded in the monitor journal.
Figure 6-7 To measure the flow rate, remove the inlet filter and attach the inlet flow adaptor.
6.5.4.2
Measure the flow rate of the module
The module flow rate is measured using a high quality flow meter such as the Aeroqual R7 or the Bios
Dry Cal. See Section 6.1
Attach the flow meter to the inlet port (white ring) of the gas module
Reconnect the inlet fitting after measuring the gas module
Record the flow rate of the module in the Journal by making a manual user entry
6.5.4.3
Adjust the PM inlet flow rate
If the PM inlet flow rate is found to be lower than expected, it could be because one of the modules
has a leak or is blocked.
To check this perform a flow check on the individual modules as described in Section 6.5.11
If one of the modules is found to be blocked or has a leak then this will need to be corrected.
If all of the modules showed reduced flow, then it is likely that the gas flow pump is aging.
The flow adjustment valve can be used to provide more flow to the module inlets, and return the flow
rate to the expected flow rate.
Attach a flow meter to the inlet and begin measuring the inlet flow. Adjust pump flow adjustment valve
until the monitor inlet flow rate has returned to the expected flowrate. The valve is shown in Figure
6-8.
Figure 6-8 The flow adaptor valve is used to adjust the monitor inlet flow to the correct value.