What is the method of sealing required for a category 3 weighing device?

The method of sealing required for a category 3 weighing device is an event logger that includes event details and new parameter values. This choice reflects the advanced level of verification and security necessary for category 3 devices, which are often used in applications where precise measurement and integrity of data are critical.

An event logger provides a comprehensive record of activities and modifications made to the weighing device, which helps ensure accountability and traceability. This level of detail is essential for maintaining regulatory compliance, as it helps verify that all operations performed on the device are documented and can be reviewed for accuracy.

In contrast, the other methods of sealing—such as a security seal with a unique code, a simple physical lock mechanism, or a tape seal with a serial number—may not provide the same level of detail and accountability. While these methods can serve as basic locks to prevent tampering, they do not offer the robust data tracking and monitoring capabilities that an event logger provides, making them unsuitable for category 3 devices that require stringent verification processes.