A Practical Guide to Particle Counting for Drinking Water Treatment - Chapter 6 doc

... detected and measured if it produces a signal with a minimum 2 to 1 signal -to- noise ratio. B. SIGNAL -TO- NOISE RATIO All electronic instruments are subject to various forms of “noise,” or random, meaningless ... mentioned is Section A, the smallest particle that can be reliably measured must produce a signal amplitude at least twice that of the noise, or a 2 to 1 signa...

Ngày tải lên: 18/06/2014, 19:20

... floppy disks are available in several proprietary formats, providing storage capacities up to a gigabyte or more. They are most useful for manual data backup and transport. Data can be accessed more ... device. They are most useful for small-scale distribution of large amounts of data. Some can only be recorded once, unlike magnetic disks, and are not as practical for day -to- day...

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... counting was boosted further when Georgia began strongly encouraging many of its plants to install particle counters. Plants in Cali- fornia and a few other states also began to investigate particle ... Royco was still a major supplier of particle counters, and a second firm named Met One was also situated to provide particle counters for water treatment application...

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... optomux protocol. While the standard optomux protocol is supported by many SCADA packages, not all of the commands are included. The standard optomux protocol provides for minimums, maximums, and ... of four-conductor cabling. B. PROTOCOLS Each of the available units communicates data by way of a unique protocol. When a standard turnkey system is installed, the protocol is not impo...

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... Several other options are available, such as manual or automatic scaling for the data (vertical) axis. Vertical and horizontal grids can be added, and a graph title and label for the vertical axis can ... display for the affected particle counter. The left-hand indicator is for commu- nication alarm, and the right-hand indicator denotes a data alarm. The combination of the main...

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... Data Broadwell, Mike A practical guide to particle counting for drinking water treatment/ Mike Broadwell. p. cm. Includes index. ISBN 1-5 66 7 0-3 0 6- 9 (alk. paper) 1. Particle counting (Water treatment ... Serial Communications A. Interface 163 B. Protocols 164 Chapter 20 Manufacturer’s Software A. Overview of Available Software 166 1. MetOne 166...

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... 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 ... briefly at some of the potential applications for particle counters in wastewater treatment. Standard wastewater is too high in concentration for particle counters, but special- L...

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... calibration will never be practical. 2. Particle Counter Calibration Verification Verifying calibration is an easier and more practical step for the water plant operator. Only a couple of particle ... 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 calibrat...

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... 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...

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... alters the approach to particle counter application. There are many ways in which grab samplers make particle counting more difficult to apply, and a few areas where they are advantageous. Again, ... 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...

Ngày tải lên: 18/06/2014, 19:20