So that voltage be monitored in an electrical system, voltmeters and other electrical devices are used and are also checked in a given routine rounds.
Elevation is a location or an area of the process equipment in relation to existing ground level and structures. This provide technicians with sufficient information about the equipment location. The data is important for them as they make rounds, catch samples, check the equipment, develop checklists and also when they perform startups and shutdowns. Moreover, equipment location drawings or plot plans points out the exact location of equipment with respect to the plant's physical boundaries. It also provide information regarding neighborhood. Included in location drawings is a loop diagram which traces all instrument linkages between the control room panel and the field instrument. Instrument such as air lines, some wiring connections at particular field junction boxes as well as front and connections control room panels are also included. P 261.