{"id":"F2009B00182","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Temperature of 20°C","slug":"f2009b00182","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":326821,"registerId":"commonwealth-F2009B00182-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"National Measurement Act 1960 - Determination by the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 of 20°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\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 of 20°C shall be a recognised-value standard of measurement having the exact value of 0.001 002 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 at a temperature of not less than 10°C and not more than 30°C in air at a pressure in the range 80 000 to 120 000 Pa, and shall have been maintained subsequently in contact with air within that temperature range and pressure range.  The water shall be free from bubbles and its electrical resistivity at 20°C shall be not less than 3 000 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":1272},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The determination maintains its original narrow technical purpose of establishing a single recognized-value standard for the dynamic viscosity of specifically prepared water at 20°C."},"complexity_factors":["Technical scientific terminology requiring domain knowledge (viscosity, Pascal-seconds, electrical resistivity)","Specific chemical preparation protocol with precise concentration thresholds (potassium permanganate at 1:10,000)","Multiple physical parameter constraints with ranges (temperature 10-30°C, pressure 80,000-120,000 Pa, resistivity minimum)","No conditional logic, exceptions, or cross-references to other legislation"],"plain_english_summary":"This determination fixes the national reference value for the dynamic viscosity of specially prepared pure water at 20°C as 0.001002 Pa·s.  \n\nIt’s used to calibrate viscosity instruments and ensure consistent, comparable measurements across Australian labs and industries (e.g., oils, paints, pharmaceuticals) by specifying precise preparation and handling conditions for the reference water."}},"importantCases":[],"_links":{"self":"/api/acts/f2009b00182","history":"/api/acts/f2009b00182/history","analysis":"/api/acts/f2009b00182/analysis","conflicts":"/api/acts/f2009b00182/conflicts","importantCases":"/api/acts/f2009b00182/important-cases","documents":"/api/acts/f2009b00182/documents"}}