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MRK-D-0048 V4
Aeroqual Dust Sentry / AQS User Guide
Page | 40
Leak check Particle Monitor and Particle Profiler
If the aluminium inlet is not correctly installed (see Section 0) or if the tubing is split then the PM can
have a leak. The vacuum gauge (AQS R23) is used to check for leaks in the Particle Monitor system
and should be performed as part of regular service.
Tools required
AQS R23
Parts required
None
Service Interval
Recommended
Every three months
(See Section 6.1)
Online reference
training.aeroqual.com: Dust Monitor technical Training Section 4.2
Online video
None
6.5.7.1
Leak check a Particle Monitor
1.
Remove the TSP head and install the R23 vacuum gauge above the sharp cut cyclone
2.
Fully close the purge valve and fully open the exhaust valve
3.
The vacuum gauge should reach at least -60 kPa
4.
Then remove power (pull out black and red cable) to the electronics module to turn off the pump.
5.
Count how long it takes for the pressure to change by 10 kPa.
Figure 6-15 Fit the vacuum gauge, adjust the valves. Then stop the pump by removing power from the
module, observe the change in pressure. If the leak rate is greater than 10 kPa in 10 seconds then there
may be a leak in the system. Check all the tube connections.
NOTE:
The pressure change (leak rate) should be no more than 10 kPa in 10 seconds.