In my mind, they're synonymous. But “measurements” is a different beast altogether. To my knowledge, I don't believe it's set out in the Weights and Measures Act as an obligation in terms of inspection. Initial inspection, approval, calibration, and certification of standards would be in there, but while it deals with measurements, the notion of measurements as an obligation is not explicitly set out. That's why I think “inspection” or “examination” would be the way to go.
On October 19th, 2010. See this statement in context.