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Reference standard of the plane angle unit in the field of small angle measurements

The standard is created and is in operation since 1996Reference standard of the plate angle unit

Standard composition:

  • terster EO-1;
  • digital indication device УЦИ Ф5246;
  • motor drive unit;
  • optical gage 01P

Tester EO-1 is installed on a special massive vibration-isolating foundation, not connected with the foundation of the building. Vibration amplitude – not more than 1 mcm.


Metrological characteristics:

  • plane angle range — 0” - 1200”;
  • non-excluded systematic error, not more than — 0,12”;
  • random error, not more than — 0,02”;
  • instability over the year — 0,10”

BelGIM calibration and measurement capabilities (СМС) in the field of geometric variables measurements are included into Attachment С of the Agreement on mutual recognition of national standards, calibration and measurement certificates (CIPM MRA) and published on International Bureau of Weights and Measures website

Sources of traceability:

Belarus, Republican unitary enterprise «BelGIM», reference standard of the unit of length-meter (RS RB 1-96)

Scope of application:

  • machinery;
  • device making;
  • construction;
  • verification and calibration laboratories;
  • creation of navigation systems;
  • geodesic and other types of research, where high precision of measurement of small angles is required


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