hole and apparatus. The volume of the apparatus is then subtracted to determine the volume of the test hole. A1.2.4.2 Determine the mass of sand required to fill the apparatus funnel and base plate in accordance with A1.2.3, following steps A1.2.3.1-A1.2.3.6 for each batch of sand. A1.2.4.3 Calculate the volume of the funnel and base plate by dividing the bulk-density of the sand (as determined in Annex A2) by the mass of sand found in A1.2.3.6. Perform a minimum of three determinations and calculate an average
value. The maximum volume variation between any one determination and the average will not exceed 1 %. Use the average of the values when performing test calculations.
NOTE A1.1—The sand-cone apparatus should be routinely inspected for damage that may affect the volume of the cone. Dings, out-of-round, or other damage will affect the volume and will necessitate a redetermination of the volume (if repairable).