BS EN ISO 17828:2015 pdf download – Solid biofuels — Determination of bulk density

BS EN ISO 17828:2015 pdf download – Solid biofuels — Determination of bulk density 5.2 Balances 5.2.1 Balance 1 A balance shall be capable of reading to the nearest 10 g. This balance shall be used for measurements with the large container. 5.2.2 Balance 2 A balance shall be capable of reading to the nearest 1 g. This balance shall be used for measurements with the small container. 5.3 Scantlings A rigid scantling with a length exceeding the diameter of the container in 5.1.1 shall be used for levelling the material in the measuring container by lateral movements of the scantling across the rim of the measuring container. NOTE It is advisable to use a second scantling or other device for spacing the dropping height of 150 mm between the measuring container and the wooden board in 5.4. 5.4 Wooden board A flat wooden board [e.g. oriented strand board (OSB)] with a thickness of approximately 15 mm and sufficient in size for dropping the container during shock exposure. 6 Sample preparation Sampling shall be carried out in accordance with ISO 18135. If necessary, the sample can be divided in to test portions in accordance with ISO 14780. The test portion volume shall exceed the volume of the container measures by minimum of 30 %. NOTE Precautions should be taken to ensure that the moisture is evenly distributed within the sample. 7 Procedure 7.1 Determination of the container volume Before use, the mass and filling volume of the container shall be determined. Weigh the empty, clean, and dry container on the balance (5.2.1 or 5.2.2). Then fill the container with water and a few drops of wetting agent (e.g. liquid soap) until maximum capacity; then weigh it again. The water should be at a temperature between 10 °C and 20 °C. Calculate the volume (V) of the container from the net weight of water and the density of the water (1 kg/dm 3 ) and record the result rounded to the nearest 0,01 l (0,000 01 m 3 ) for the large container or 0,001 l (0,000 001 m 3 ) for the small container. NOTE 1 The effect of temperature on the density of water is negligible. NOTE 2 The container should be cleaned regularly and its volume should be checked regularly. 7.2 Container selection The large container (5.2.1) can be used for larger materials within the scope of this...