Terminology, approval route and the range change by market.

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Research

Research and reference

Maintained because we use it to specify units, and published because the people buying them need the same material.

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14 pages. Every one of them cites the instrument or the regulator it came from, with the date it was read, and carries no sales route.

What the law requires

Read from the instrument, with the paragraph named

Before a unit can be used

The questions answered before a specification is frozen

Method and record

How the reference is kept