What is the typical purpose of a device tag in a HART-enabled system?

• A. To store calibration data used by master for computations.
• B. To provide a human-readable identifier that helps locate and identify the device; stored in the device and retrievable by the master.
• C. To enable high-precision time synchronization.
• D. To set the device's measurement units.

Answer: (B)

In a HART-enabled system, a device tag is a human-readable label stored in the device that the master can read. This tag lets operators quickly locate and identify a specific transmitter in a plant, map it to the correct asset, and understand its function without relying on obscure serial numbers. It’s about easy identification and asset management, and it stays with the device across power cycles. It isn’t used for storing calibration data, enabling time synchronization, or setting measurement units—those functions come from other configuration data in the device or system.