TSI Instruments 3772 - Basic Instrument Functions; Concentration Measurement; Electronics Boards Inside the Model 3772;3771 CPC

3-10 Model 3772/3771 Condensation Particle Counter
Figure 3-7
Electronics Boards inside the Model 3772/3771 CPC
1. Main PC board
4. Communication connector board
2. Laser board
5. Flash memory board (3772 only)
3. Detector board
Basic I n s trume n t F uncti o n s
This section describes basic instrument functions.
Concentration Measurement
Particle concentration is presented as particles per cubic centimeter (p/cc).
For the 3772, the particle concentration is displayed on the front panel LCD
in numeric form. For both CPCs, data is collected using the Aerosol
Instrument Manager
®
software or other terminal program (such as
HyperTerminal). Particle concentration is determined from the count rate
(particles counted per tenth of a second) and the aerosol flow rate,
nominally 1000 cubic centimeters per minute (cm
3
/min). The concentration
is also live-time corrected for coincidence. Refer to Chapter 6 “Live-Time
Counting” for more information.