When changing the thermal meter chart, which details are mandatory to include?

The correct answer emphasizes the importance of documenting key details when changing a thermal meter chart. This process requires comprehensive information to ensure accurate tracking and accountability.

Including the date and time is essential for historical accuracy and helps establish a clear timeline of when the changes were made. The license number is crucial for regulatory compliance, as it identifies the individual or organization responsible for the meter's operation. The product number is equally important, as it specifies what is being measured, ensuring that the data relates to the correct product and can be audited or traced back if needed.

When all of these elements are recorded together, they provide a complete record that can be referenced for regulatory reviews, audits, or operational analysis. This enhances transparency, minimizes errors, and maintains the integrity of thermal measurement processes.