Controlling chemical dispense operations based on a conductivity offset
First Claim
1. In a computer system, a method for controlling conductivity of a chemical solution situated in a solution storage tank, the chemical solution being formed by combining at least one component chemical product with water in the solution storage tank, the method comprising:
- determining a conductivity measurement associated with the water;
after the chemical solution is formed in the solution storage tank, calculating a conductivity measurement for the chemical solution, wherein the conductivity measurement indicates a percent concentration of the component chemical product relative to water in the chemical solution; and
analyzing the conductivity measurement associated with the water, the conductivity measurement of the chemical solution and a conductivity setpoint specified for the chemical solution to determine whether the component chemical product should be supplied to the solution storage tank, wherein the conductivity setpoint indicates a desired percent concentration of the component chemical product relative to water in the chemical solution.
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Accused Products
Abstract
A system and method is disclosed for controlling chemical dispense operations based on a conductivity offset determined for a chemical solution. The chemical dispense operations are performed by or in conjunction with operation of a utility device, such as a warewashing machine. The chemical solution is formed in a solution tank device by combining water with at least one component chemical product. The conductivity offset, which is the conductivity of the water, is used to normalize the conductivity estimated for the chemical solution relative to the component chemical product in the solution. During various points in time during operation of the utility device, the normalized conductivity is compared to a conductivity setpoint, and if the normalized conductivity falls below the conductivity setpoint, a specified volume of the component chemical product is supplied to the solution tank.
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Citations
60 Claims
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1. In a computer system, a method for controlling conductivity of a chemical solution situated in a solution storage tank, the chemical solution being formed by combining at least one component chemical product with water in the solution storage tank, the method comprising:
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determining a conductivity measurement associated with the water;
after the chemical solution is formed in the solution storage tank, calculating a conductivity measurement for the chemical solution, wherein the conductivity measurement indicates a percent concentration of the component chemical product relative to water in the chemical solution; and
analyzing the conductivity measurement associated with the water, the conductivity measurement of the chemical solution and a conductivity setpoint specified for the chemical solution to determine whether the component chemical product should be supplied to the solution storage tank, wherein the conductivity setpoint indicates a desired percent concentration of the component chemical product relative to water in the chemical solution. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A system for controlling conductivity of a chemical solution situated in a solution storage tank, the chemical solution being formed by combining at least one component chemical product with water in the solution storage tank, the system comprising:
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a sensor sensing first information related to inherent conductivity of the water and second information related to conductivity of the chemical solution, wherein the conductivity of the chemical solution indicates percent concentration of the component chemical product relative to water in the chemical solution; and
a controller communicatively coupled to the sensor for receiving the first and second information and analyzing the first information to render a conductivity reading for the water and the second information to render a conductivity reading for the chemical solution, wherein the controller analyzes the conductivity reading for the water, the conductivity reading for the chemical solution and a conductivity setpoint specified for the chemical solution to determine whether the component chemical product should be supplied to the solution storage tank, wherein the conductivity setpoint indicates a desired percent concentration of the component chemical product relative to water in the chemical solution. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A computer program storage device accessible to a computing system and encoding a computer program for executing a computer process for controlling conductivity of a chemical solution situated in a solution storage tank, the chemical solution being formed by combining at least one component chemical product with water in the solution storage tank, the computer process comprising acts of:
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determining a conductivity measurement associated with the water;
after the chemical solution is formed in the solution storage tank, calculating a conductivity measurement for the chemical solution, wherein the conductivity measurement indicates a percent concentration of the component chemical product relative to water in the chemical solution; and
analyzing the conductivity measurement associated with the water, the conductivity measurement of the chemical solution and a conductivity setpoint specified for the chemical solution to determine whether the component chemical product should be supplied to the solution storage tank, wherein the conductivity setpoint indicates a desired percent concentration of the component chemical product relative to water in the chemical solution. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60)
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Specification