5-2 Model 3750 Condensation Particle Counter
generated by light scattered from individual droplets, the CPC uses a
continuous, live-time coincidence correction to improve counting accuracy
at high particle concentrations. Coincidence occurs when the presence of
one particle obscures the presence of another particle creating an
undercounting error.
Figure 5-1
Flow Schematic of the CPC
Flow System
Refer to the flow schematic above while reviewing information on
instrument flow provided in this section.
The CPC relies on an external (user supplied) high-vacuum pump to
maintain constant flows through a critical orifice inside the CPC. The flow
rate through the sensor is always 1.0 L/min. More information on
instrument flow is provided below.
To Next Page
Loading...
Need help?
General
