Troubleshooting matrix

Table 14.1 is a troubleshooting matrix that shows trends in normalized performance and possible causes. The table lists different sets of performance parameters and possible causes for each. Some symptoms are the same, such as items one through three in the table, but each occurs in a different place in the RO system, and thus, each has a different cause. 

Insufficient vacuum flow leads to hole wall quality problems such as gouging, nail heading, and excessive smearing. Table 25.1 provides a hole-quaUty troubleshooting matrix that addresses these problems. The minimum industry standard for vacuum strength is approximately 20 in. of water measured at the pressure foot. 

We followed with a discussion of one of the most common troubleshooting tasks in the computer industry— troubleshooting printer problems. We discussed dot matrix, bubble-jet, and laser printers—their components and some of the most common problems with each technology. 

An understanding of the mechanisms of solid-phase extraction (SPE) are crucial for effective methods development. The four mechanisms outlined in Chapter 2 are sufficient for the majority of SPE and are an effective set of tools for methods development. The molecule s structure and the sample matrix are the main features used to choose a mechanism of isolation and separation. This chapter will discuss a six-step approach to methods development, how to execute the SPE recovery experiment, troubleshooting and optimizing conditions for the SPE recovery experiment, and how to critically evaluate previously published methods. 

PLASTEC is one of 20 information analysis centers sponsored by the Department of Defense to provide the defense community with a variety of technical information services applicable to plastics, adhesives, and organic matrix composites. For the last 21 years, PLASTEC has served the defense community with authoritative information and advice in such forms as engineering assistance, responses to technical inquiries, special investigations, field troubleshooting, failure analysis, literature searches, state-of-the-art reports, data compilations, and handbooks. 

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