Instrument Operation 4-13
Figure 4-9
Status Screen
Information provided in the Status screen is described below.
Saturator Temperature
Saturator temperature is 39°C when the instrument warm up is
complete and the instrument has stabilized. The saturator provides
saturated butanol vapor that mixes with aerosol particles.
Condenser Temperature
Particle growth occurs in the condenser as butanol vapor from the
saturator is cooled and condenses on sampled aerosol particles.
The condenser temperature is maintained at 14°C.
Optics Temperature
The optics temperature is maintained at 40°C. This is higher than
the saturation temperature and prevents butanol from condensing
on the lenses and other internal components in the particle
detection optics.
Pressures (kPa)
Pressures from three transducers are labeled A, O, N and displayed
on the Status Screen. A: is the barometric air pressure in kPa. Inlet
air pressure is very close to the barometric pressure when sampling
directly from the ambient environment. A restriction at the inlet will
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