H. Maintaining and Troubleshooting the AQSync
Model AQSync Air Quality Monitoring Station Manual Rev. A-1
43
4. Undo the two black thumbscrews on the back of the housing, shown by the 2
red arrows.
5. Remove the cover of the housing.
6. Remove the scrubber by pulling the tubing off the barbed fittings. Note that the
smooth end of the scrubber is on the bottom as shown in the picture.
7. Install the new scrubber, being sure to orient the smooth end as shown in #6.
Reverse the steps to reassemble and reinstall the housing in the AQSync.
H.1.2
Replacement of Ozone Measurement Scrubber
It is recommended that the ozone instrument
’s internal measurement scrubber/filter
assembly be replaced periodically, preferably every 6 months but at least annually. A
replacement scrubber/filter assembly is available for purchase from 2B Technologies.
In Section I of this manual, see Figure I.4 for its location on the ozone module. Contact
2B Technologies for information on accessing this scrubber/filter assembly.
H.1.3
Replacement of NOx and Ozone Inlet Filters
The inlet filters of the NOx and ozone modules should be replaced if the flow rate is
declining or if visible contamination is present. Frequency will depend on conditions of use
(general recommendation: every 3 months).
The NOx and ozone instrument flow rates can be used as a check on the filter
performance, in that reduced flow rates (below ~1 L/min) would indicate a need to
replace the filter(s).
NOx filter check:
The flow rate for the NOx
instrument can be viewed on
the NOx Parameters screen
(cell flow).
Ozone filter check: The pump for the CO
2
module
and CO sensor is used also
for the ozone module. There
is no flowmeter in this path.
The ozone module’s cell pressure
4
5
6
Smooth
end of
scrubber
Ridged,
wider end of
scrubber
