Patent ID: 6980914

Claim:
A method of determining a corrected weight of a batching tank, the batching tank adapted to receive one or more materials, each material having a density, the batching tank having a weight, a pressure, and a volume, wherein the batching tank initially comprises a fluid having a density, the method comprising: measuring one or more first weights of the batching tank, wherein the first weights are determined while the fluid is removed from the batching tank; measuring one or more first pressures in the batching tank, wherein each first pressure is determined substantially simultaneously with the determination of a first weight; measuring one or more second weights of the batching tank, wherein each second weight is measured while a material is transferred into the batching tank; measuring one or more second pressures in the batching tank, wherein each second pressure is measured substantially simultaneously with the measurement of each second weight; and determining a corrected weight of the batching tank based on one of the second weights, one of the second pressures, one or more first weights, one or more first pressures, the density of the material being transferred to the batching tank, and the density of the fluid, wherein the corrected weight of the batching tank does not include the weight of the fluid in the tank.