Apparatus and method for mixing a plurality of substances.

摘要

A transportable apparatus for controlling the production of a mixture of a fluid (supplied at 32) and a plurality of additives (from tanks e.g. 44, 46) utilizes a unified control panel (on an operator's platform 54) having all of the necessary controls compactly contained in a single housing (56) for providing both automatic and manual control of each of the additive channels through which the additives are mixed with the primary fluid, for flow into a holding tank (16). The control of each additive channel is achieved through a software controlled algorithm by which errors are only incrementally, rather than totally, applied to prior drive signals at any one time.