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BS EN ISO 5815-1:2019 pdf free

BS EN ISO 5815-1:2019 pdf free.Water quality - Determination of biochemical oxygen demand after n days (BODn). The BODn, with inhibition of nitrification is determined, using the dilution method. A batch series with different dilutions of a sample is prepared and examined. The dilution water is enriched with oxygen and seeded with adapted aerobic microorganisms. The sample is incubated at...

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BS EN ISO 2808:2019 pdf free

BS EN ISO 2808:2019 pdf free.Paints and varnishes - Determination of film thickness (ISO 2808:2019). calibration operation that, under specified conditions, in a first step, establishes a relation between the quantity values with measurement uncertainties provided by measurement standards and corresponding indications with associated measurement uncertainties and, in a second step, uses this information to establish a relation for obtaining...

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BS ISO 9113:2019 pdf free

BS ISO 9113:2019 pdf free.Plastics - Polypropylene (PP) and propylene-copolymer thermoplastics- Determination of isotactic index. 5.1.1 Reduce the propylene plastic solid matter to particles fine enough to pass through the sieve . For powder, flakes, fibres or films, grinding and screening are unnecessary if at least one dimension is less than 0,6 mm. Films shall be cut into small fragments...

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BS ISO 4037-3:2019 pdf free

BS ISO 4037-3:2019 pdf free.Radiological protection - X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy. For the tables in Clauses 6 and 8, the irradiation distance is measured from the focal spot of the X-ray tube (or from the geometrical centre of the radio nuclide source)...

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BS ISO 3384-1:2019 pdf free

BS ISO 3384-1:2019 pdf free.Rubber, vulcanized or thermoplastic -Determination of stress relaxation in compression. A test piece of vulcanized or thermoplastic rubber is compressed to a constant deformation and maintained at a predetermined test temperature. The decrease in counterforce is then measured. In method A, the compression is applied and all counterforce measurements are made at the test temperature. In...

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BS ISO 20785-4:2019 pdf free

BS ISO 20785-4:2019 pdf free.Dosimetry for exposures to cosmic radiation in civilian aircraft. standard barometric altitude pressure altitude altitude determined by a barometric altimeter calibrated with reference to the International Standard Atmosphere

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BS EN ISO 9202:2019 pdf free

BS EN ISO 9202:2019 pdf free.Jewellery and precious metals -Fineness of precious metal alloys. 1 Scope This document specifies a range of fineness of precious metal alloys (excluding solders) recommended for use in the field of jewellery. NOTE， There is a possibility that national legal requirements for the designation, marking, and stamping of finished articles exist in the respective countries....

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BS EN ISO 307:2019 pdf free

BS EN ISO 307:2019 pdf free.Plastics - Polyamides - Determination of viscosity number. Transfer 50 ml of m-cresol (5.1.3) into a weighing flask (6.4) and add with a glass pipette (6.5) 0,14 ml of orthophosphoric acid (5.1.Z). Close the flask and stir with a magnetic stirrer for 30 min at 100 °C. Add the solution to approximately 800 ml of...

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BS EN 12407:2019 pdf free

BS EN 12407:2019 pdf free.Natural stone test methods -Petrographic examination. A macroscopic description of the sample is undertaken at first. The macroscopic description may involve a visual inspection aided by a hand lens or a stereoscopic microscope. Then one or more thin sections prepared from the sample are examined using an optical polarized transmitted light microscope in order to give...

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BS EN 3645-010:2019 pdf free

BS EN 3645-010:2019 pdf free.Aerospace series - Connectors, electrical, circular, scoop-proof, triple start threaded coupling, operating temperature 175 °C or 200 °C continuous. 1 Scope This European Standard specifes the characteristics of hermetic receptacles with jam nut mounting in the family of circular, electrical connectors, with triple start threaded coupling. It applies to models in Table 3. For plugs and...

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