What is the purpose of device tags in as-built documentation?

• A. Provide unique identification for devices
• B. Determine calibration values
• C. Indicate battery status
• D. Determine purchase order numbers

Answer: (A)

Device tags provide a unique identification for each instrument, which is essential for traceability in as-built documentation. When every device has a distinct tag, you can reliably link the physical asset to its corresponding drawings, specifications, calibration records, maintenance history, and location. This creates a single reference key that connects everything from installation details to future modifications, ensuring the installed system matches the design and enabling accurate updates over the asset’s life.

Calibration values, battery status, and purchase order numbers may be associated with a tagged device in records, but they are not the tag’s primary purpose. The tag itself is about identifying the device so all related data can be organized and retrieved consistently.