System Selection

The majority of the systems purchased for existing utility boilers are the dilution-extractive type. Beyond the utility industry, the dry-extractive, wet-extractive, and dilution-extractive systems are all viable choices. The accuracy, reliability, and cost differences must be considered in the selection of a system for a specific application. The CEM system selection process can also be limited by local regulatory agencies. These restrictions can include preap-proval procedures that limit the type of system an agency accepts. For example, with some types of emission monitors, some states require that only dedicated, continuous measurement are used; that is no time-sharing. They can also define such terms as "continuous." This factor directly defines the requirements for a data acquisition system.

Regulator

FIG. 5.12.4 Dilution-extractive system schematic. (Reprinted, with permission, from Lear Siegler.) ©1999 CRC Press LLC

Regulator

FIG. 5.12.4 Dilution-extractive system schematic. (Reprinted, with permission, from Lear Siegler.) ©1999 CRC Press LLC

FIG. 5.12.5 Dilution probe.
FIG. 5.12.6 Decision chain. (Reprinted, with permission, from J. Schwartz, S. Sample, and R. Mcllvaine, 1994, Continuous emission monitors—Issues and predictions, Air & Waste, Vol. 44 [January].)
DIY Battery Repair

DIY Battery Repair

You can now recondition your old batteries at home and bring them back to 100 percent of their working condition. This guide will enable you to revive All NiCd batteries regardless of brand and battery volt. It will give you the required information on how to re-energize and revive your NiCd batteries through the RVD process, charging method and charging guidelines.

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