What is a national traceability level chart?

Answer: The national traceability level chart is also called the same-country metrology verification system chart in my country. It refers to a traceability level chart that is valid for a given amount of metrological instruments in a country. It includes recommended (or allowed) comparison methods and means.

What is a traceability level chart?

Answer: The traceability level chart refers to a block diagram representing the order of levels, which is used to show the relationship between the metrological characteristics of the metrological instrument and the benchmark of a given amount. The purpose of establishing this chart is to minimize the measurement error and provide the greatest credibility for all measurements, including the most common measurements, in the way of tracing back to the benchmark.