Casella CEL Microdust Pro real time dust monitor - Manual (Page 5)

MicroDust Pro Aerosol Monitoring System
5 Casella CEL
Figure 1. Sampling probe
1. Infra-red emitter
2. Sample volume
3. Infra-red detector
4. Light stop
Under clean-air conditions, all light is prevented from reaching the received by
a light stop (4). When dust particles enter the sample volume (2), the beam of
infra-red light is scattered within a narrow angle (12° to 20°) to the receiver (4).
By using a narrow angle of scatter, the instrument is made less sensitive to
variations in the refractive index and colour of measured particulate.
1.1 Structure of this User Manual
The structure of this User Manual is designed to help you find the information
and instructions you need to complete a task easily. Refer to section 3 “
Using
the instrument ” on page 12 for instructions to use the MicroDust Pro
instrument.
To help you find the information you need quickly in the electronic version of
this User Manual, it includes ‘clickable’ links. The links appear as blue
underlined text. You can also click the names of chapters and sections in the
bookmark panel, and in the
table of contents , to jump to that part of the
manual.