... sensitivity
resolution and coincidence characteristics, while the latter impacts maintenance and
potential for damage due to leaks.
A. FLOW CELL
Most of the manufacturers except for Met One provide a standard-type ...
147
CHAPTER
16
Particle Sensor Construction
All the manufacturers of drinking water particle counters provide particle sensors
quite similar in o...
... Packaged Treatment Plants
Packaged treatment plants, as touched on above, are prefabricated plants, which
are more cost-effective than ground-up plants for smaller applications. A packaged
plant ... removal. (Courtesy of Pacific Scientific Instruments, Grants Pass, OR.)
28 A PRACTICAL GUIDE TO PARTICLE COUNTING
manufacturers of packaged treatment plants employ particle c...
... case of online particle counting, trending the grab-sample data
with other plant parameters will add to its value. If these data are available in a
usable file format that can be imported into ... prior to each
use. Certainly an acid washer and particle- free storage area would be ideal, but these
are usually not necessary for 2- m particle counting. It is a good idea to k...
...
82 A PRACTICAL GUIDE TO PARTICLE COUNTING
The cell window materials vary in optical quality. Small imperfections in the
material diffuse the light and are a source of resolution and sizing ... reflected back into
the laser, it can disrupt this process, and cause variations in the beam intensity. This
is another reason that aluminum flow cells are anodized a dark color, as the...
...
126 A PRACTICAL GUIDE TO PARTICLE COUNTING
on the same graph. In this way, various filter effluents can be compared, or auxiliary
data compared with particle count data. It is also useful to have ... important that data be easily
accessible. File structure should allow data to be imported directly into database or
spreadsheet programs.
The historical data should be availabl...
... LLC
130 A PRACTICAL GUIDE TO PARTICLE COUNTING
b. Software
Grab-sampling software may be used to upload configuration parameters as well
as to download the data collected by the grab sampler. ... downloading
at a later time. A paper printout may be useful for backup, but should not be the
primary means of data storage.
4. Computer Interface
a. Hardware
Most data communic...
... on a simple adjustable stand and stored in a rugged watertight ABS
plastic equipment case for ease of storage and portability. The 2400 PS has a local
display and a membrane touch keypad operator ... A PRACTICAL GUIDE TO PARTICLE COUNTING
All of the units operate off AC power and rechargeable DC batteries. Battery
operation provides ease of portability, as well as reduc...
... at a time. If a spare
is available it can be rotated into service. The maintenance log should be kept up-
to- date, and calibration stickers displaying the date of calibration placed on each
particle ... practical.
2. Particle Counter Calibration Verification
Verifying calibration is an easier and more practical step for the water plant
operator. Only a couple of partic...
... PRACTICAL GUIDE TO PARTICLE COUNTING
The disadvantage to this approach is that the particle counter data are collected
and displayed separately from the other plant data, requiring separate training ... second alternative is the direct interface of the particle counters to SCADA
using serial data communications. All count data, as well as status and alarm
information, are t...