MRK-D-0048 V4
Aeroqual Dust Sentry / AQS User Guide
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If this error occurs contact the Aeroqual distributor in your local country for technical support.
Symptom
Possible cause
Fault isolation /
Solution
Reference
Gas module troubleshooting
Negative readings
Flow leak or incorrect
flow
Section 6.5.4
Dirty inlet gas filter
Change filter
Section 6.5.5
Incorrect zero
calibration
Perform zero
calibration
Section 2
Gas readings noisy or
unstable
Flow leak or incorrect
flow
Section 6.5.11
Module is aging
Replace module
Section 6.5.12
Gas readings
significantly different
than expected
Incorrect gain or
offset applied
Check the correct
gain has been applied
correctly
Section 7.2
Incorrect calibration
performed
Incorrect gas cylinder
used or gain
calculated incorrectly
Redo calibration or
identify error and correct
it
Particle Monitor and Particle Profiler troubleshooting
PM 2.5 > PM 10.0
Cyclones fitted on the
wrong side
Swap cyclones to
correct side
Section 0
Auto zero calibration
failing on the PM10.0
Check baseline
calibration of PM10.
Section 6.5.8
Incorrect gain applied
Check gain on
module
Section 6
Leak in flow system
Check for leaks
Section 6.5.7
Negative numbers
Auto zero calibration
failing...
Check baseline
calibration of PM10.0
Section 6.5.8.2
Readings lower than
expected
Flow rate too low
Check flow rate
change pump if
required
Section
Section 6.5.10
Dirty optics
Have optical module
serviced
Section 6.6
Failed laser
Have optical module
serviced
Section 6.6
Dirty sample filters
Change filter
Section 6.5.5
Table 8-1 Common troubleshooting tasks and how to solve them