Meter incorporating a digital fullscale setting device
AssigneeEmerson Electric Co.
InventorJohn C. Grebe, Jr.
Life of this patent
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Abstract
A fullscale setting device for a magnetic flowmeter or the like receives a frequency encoded input and divides it by a mixed number having an integral part and a fractional part to produce an output. The mixed number may represent a flow rate which is taken as the fullscale setting, thereby making the fullscale setting independent of the calibration of the flowmeter.
Claims6
In a meter producing an output in the form of a train of pulses having a frequency proportional to a quantity being measured, the improvement comprising a digital fullscale setting device for receiving said train of pulses as an input and producing a second train of pulses having a frequency equal to the frequency of said first train of pulses divided by a selectable number in the form of a mixed number having an integral part I and a fractional part F, said digital fullscale setting device comprising settable means for pre-setting a number N having an integer part I and a fractional part F, and means responsive to said settable means for alternatively producing either an output for each I inputs or an output for each (I+1) inputs through a cycle, the proportion of outputs for each (I+1) inputs in each cycle being equal to said fractional part F.
Dependencies are inferred from the claim text.