What must be present on platform balance beam scales to indicate they are certified?

Certification decals are crucial on platform balance beam scales as they serve as a clear indication that the scales have been officially certified for accuracy and compliance with regulatory standards. These decals typically provide information about the certification, including the date of calibration and the authority that performed the certification. This ensures that users can trust the measurements taken with these scales, which is essential for safety and regulatory compliance in contexts like dispensing LP-gas.

While calibration marks are important for users to gauge the measurement increments on the scales, they do not indicate official certification. Similarly, license numbers and manufacturer tags might provide some useful information regarding the scale's origin and legitimacy but do not confirm its calibration status. Thus, the presence of certification decals is a definitive marker of a scale's validated accuracy and reliability.