PIRA 1A10.30 Basic Units: Standard of Length

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Instructions / Notes:

• One meter stick is provided.
  

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Concepts Conveyed:

• The one meter bar has been compared with the National Bureau of Standards of the United States.


• The length of the bar from zero to the one meter line at 20 deg C is 1000.068 millimeters.


• The value for the length of the bar at 20 deg C is not in error by more than 0.002 mm.


• Maker of bar: Societe Genevoise.


• Date bar was tested and calibrated: November 9, 1938.

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