C. Quick Start: Initiating Measurements
Model AQSync Air Quality Monitoring Station Manual Rev. A-1
15
C.2.1
Ozone (and Optional VOCs)
Once the instrument has been powered on, the first dozen ozone readings (requiring
about two minutes) will be spurious, with large positive and negative swings due to the
rapid warmup of the lamp and electronics of the ozone monitor. Also, ozone readings
may be noisier than expected during the initial 10-20 minutes required for the lamp,
photodiode, and internal temperature of the absorption cell to stabilize.
If the AQSync includes the VOCs option, its readout is given here along with ozone.
C.2.2
NO
2
/NO/NO
x
The instrument requires a warmup period of ~10-20 minutes. The screen will read
zeroes for NO
2
, NO, and NO
x
during this period.
C.2.3
CO
2
The CO
2
instrument requires about 30 minutes of warmup to achieve thermal stability
and to cycle through some automated zeroing checks.
C.2.4
CO
In a typical configuration of the AQSync, there are 2 identical CO sensors. The
measured value of CO shown on the touchscreen and found in the data stream is the
average of the 2 sensors. The CO sensors require an equilibration period of about 15-
20 minutes.
C.2.5
Particulate Matter (PM)
The particulate matter instrument requires only ~5 minutes of warmup.
C.2.6
Power Relay Status
This screen gives the status of
the power relays. (These can be
turned on and off in the
Settings/System Settings screen;
see Section E.7.6.)
R1 is a heater; Pump 1 is the
pump
associated
with
the
ozone/CO/VOCs/CO
2
modules,
and Pump 2 is associated with
the NOx module. Pump 3 is
currently not in use.
