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9. Information to be borne by and to accompany the instrument

A measuring instrument shall bear the following inscriptions: manufacturer’s name, registered trade name or registered trade mark; information in respect of its accuracy; and, where applicable: information in respect of the conditions of use; measuring capacity; measuring range; identity marking; number of the EU-type examination certificate or the EU design examination certificate; information whether or not additional devices providing metrological results comply with the provisions of this Directive on legal metrological control. An instrument of dimensions too small or of too sensitive a composition to allow it to bear the relevant information shall have its packaging, if any, and the accompanying documents required by the provisions of this Directive suitably marked. The instrument shall be accompanied by information on its operation, unless the simplicity of the measuring instrument makes this unnecessary. Information shall be easily understandable and shall include where relevant: rated operating conditions; mechanical and electromagnetic environment classes; the upper and lower temperature limit, whether condensation is possible or not, open or closed location; instructions for installation, maintenance, repairs, permissible adjustments; instructions for correct operation and any special conditions of use; conditions for compatibility with interfaces, sub-assemblies or measuring instruments. Groups of identical measuring instruments used in the same location or used for utility measurements do not necessarily require individual instruction manuals. Unless specified otherwise in an instrument-specific annex, the scale interval for a measured value shall be in the form 1 × 10^(n), 2 × 10^(n), or 5 × 10^(n), where n is any integer or zero. The unit of measurement or its symbol shall be shown close to the numerical value. A material measure shall be marked with a nominal value or a scale, accompanied by the unit of measurement used. The units of measurement used and their symbols shall be in accordance with the provisions of Union legislation on units of measurement and their symbols. All marks and inscriptions required under any requirement shall be clear, non-erasable, unambiguous and non-transferable.

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Source: EUR-Lex (Cellar) · retrieved 2026-11-06 · Text as adopted (Official Journal); later amendments are not incorporated in this text.