MRK-D-0048 V4
Aeroqual Dust Sentry / AQS User Guide
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6.7 Scheduled maintenance
The service frequencies should be considered conservative. Monitor operators are encouraged to
develop a service schedule suitable for their local conditions and data quality objectives.
Service activity
Section
Service frequencies
Gas inlet filter change
4-12 weeks
Initially 4 weeks
. Later this can be modified to
suit local conditions and data quality objectives
PM inlet filter change
4-12 weeks
Initially 4 weeks
. Later this can be modified to
suit local conditions and data quality objectives
Gas inlet flow check
4-12 weeks
Initially 4 weeks
. Later this can be modified to
suit local conditions and data quality objectives
PM inlet flow check
4-12 weeks
Initially 4 weeks
. Later this can be modified to
suit local conditions and data quality objectives
Gas inlet flow
adjustment
Adjust as required following gas inlet flow check
PM inlet flow
adjustment
Adjust as required following PM inlet flow check
PM leak check
Every
3 months
(Quarterly)
PM zero calibration
check
Every
3 months
(Quarterly)
PM zero calibration flow
check
Every
3 months
(Quarterly)
PM inlet cleaning
Every
3 months
(Quarterly)
Change gas flow pump
Every
12 to 18 months
or if flow rate cannot be set correctly
Change Particle Monitor
flow pumps
Every
12 to 18 months
or if flow rate cannot be set correctly
Factory calibration of
Particle Monitor
Every
24 months
(2 years)
Factory calibration of
Particle Profiler
Every
12 months
(1 year)
Gas module calibration
5.1
See section 7.1
Unscheduled maintenance
Service activity
Section
Service frequencies
Measure flow rate of
gas modules
As required following gas inlet flow check
Leak check a gas
module
As required following module flow check
Add, remove, replace
gas module
As required
Table 6-1 Service frequency guidelines for various service activities