This automation industry quiz question comes from the ISA Certified Control Systems Technician (CCST) program. Certified Control System Technicians calibrate, document, troubleshoot, and repair/replace instrumentation for systems that measure and control level, temperature, pressure, flow, and other process variables. Click this link for more information about the CCST program.
An instrument location plan shows the _________ of each instrument.
a) location and wiring plan
b) location, elevation, and tag number
c) specification number and tag number
d) location, specification number, and elevation
e) none of the above
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Specification numbers (part of answers C and D) are usually indicated on instrument lists and instrument installation details. Wiring plans (part of answer A) are typically shown on conduit and wiring schedules or cabling diagrams. Although these details are useful in the installation of a plant, they are not part of the instrument installation plans.
The correct answer is B, “location, elevation, and tag number.” Instrument location plans are most often used to support new plant installations and give the installer information about the actual physical location of the installation of an instrument, the elevation of installation (at grade, on a platform, at what height on a process line, etc.), and the tag number of the instrument to be installed.
Reference: Goettsche, L.D. (Editor), Maintenance of Instruments and Systems, 2nd Edition