{"id":"F2009B00181","name":"National Measurement Act 1960 - Determination by the National Standards Commission - Recognized-Value Standard of Measurement of Viscosity - Dynamic Viscosity of Water at a Temperature in the Range 19.98°C to 20.02°C","slug":"f2009b00181","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":326818,"registerId":"commonwealth-F2009B00181-current","compilationNumber":null,"startDate":"2026-04-08","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"National Measurement Act 1960 - Determination by the National Standards Commission - Recognized-Value Standard of Measurement of Viscosity - Dynamic Viscosity of Water at a Temperature in the Range 19.98°C to 20.02°C","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 20.2\ntitle: NATIONAL MEASUREMENT ACT 1960\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nnational measurement act 1960\n\n \n\ndetermination by the national standards commission\n\n \n\n \n\nRecognized-Value Standard of Measurement\n\nof Viscosity\n\n \n\n \n\nIn pursuance of paragraph 8A(1)(a) of the National Measurement Act 1960, the National Standards Commission hereby determines that the magnitude of the dynamic viscosity of water prepared as in the Schedule and at a temperature in the range 19.98°C to 20.02°C shall be a recognised-value standard of measurement having the value of 0.001 002 Pa.s.\n\n \n\nFor the purposes of this Determination the chance is not more than one in one hundred that the viscosity of the water differs from the designated value by more than 0.000 001 Pa.s.\n\n \n\n## The Schedule\n\n \n\nThe water shall have been prepared by being distilled at least twice, the final distillation having been performed after addition to the water of potassium permanganate to a concentration of not less than one part in ten thousand by mass. In the final distillation the distillate shall have been collected in silica or borosilicate glass. The water shall have been maintained subsequently in contact with air at a pressure in the range 80 000 to 120 000 Pa, and shall be free from bubbles. The electrical resistivity of the water at 20°C shall be not less than 1 000 Ω.m.\n\n \n\n \n\nDated this 21st day of March 1985\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\nThe common seal of the national     T.J. PETRY\n\nstandards commission was hereto\n\naffixed by authority of the Commission\n\nin the presence of\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1840},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This determination maintains its original narrow technical scope of establishing a single recognized-value standard for the dynamic viscosity of specially prepared water at approximately 20°C. It has not expanded beyond this specific metrological purpose."},"complexity_factors":["Highly technical scientific specifications requiring chemistry expertise (double distillation with potassium permanganate, electrical resistivity requirements)","Precise physical parameters with tight tolerances (temperature window of only 0.04°C)","Statistical uncertainty statement requiring scientific interpretation (99% confidence interval expressed as 'not more than one in one hundred' chance)","Single-purpose instrument with no conditional exceptions or nested logic"],"plain_english_summary":"This determination defines Australia’s national reference for the dynamic viscosity of specially prepared water at 20.00°C as exactly 0.001002 Pa·s, with a measurement uncertainty limiting the chance of deviation beyond 0.000001 Pa·s to under 1%. It applies to labs, calibration services, viscometer manufacturers and industries needing traceable viscosity measurements, ensuring consistent, nationally comparable results."}},"importantCases":[],"_links":{"self":"/api/acts/f2009b00181","history":"/api/acts/f2009b00181/history","analysis":"/api/acts/f2009b00181/analysis","conflicts":"/api/acts/f2009b00181/conflicts","importantCases":"/api/acts/f2009b00181/important-cases","documents":"/api/acts/f2009b00181/documents"}}