Method of calibrating a weighing apparatus
First Claim
1. In a system for weighing a weighted object including a scale for outputting digital signals representing the weight of the object, a processor connected to the scale, first and second sets of settable switches in which the switches are manually settable by the operator to a first or second position representing the binary bit of a digital value and a display connected to the processor, a method for calibrating the scale comprising the steps of:
- manually setting the first set of settable switches to a first position;
applying power to the system;
displaying instructions by the processor on the display for the operator to place a weighted object on the scale;
manually placing the weighted object on the scale to put the scale in a first weighted condition;
performing a first sampling operation of the output of the scale by the processor to generate first digital signals representing the weight of the weighted object;
comparing the first digital signals with the setting of the first set of settable switches;
displaying instructions by the processor on the display identifying the settings of the first set of settable switches to represent the first digital signals; and
manually setting the first set of switches in accordance with the instructions displayed.
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Accused Products
Abstract
A method for calibrating an electronic scale includes sampling the output of the scale a predetermined number of times to generate a number of average readings for the weight that is placed on the scale, comparing two successive average readings and selecting the average reading that is within a predetermined weight of the previous average reading, comparing the digital signals sampled representing the selected average reading with the setting of a plurality of settable switches in which each switch position will represent a binary bit and displaying on a display the switch settings which represents the selected average reading of the output of the scale. The operator in response to instructions displayed on the display will place a weighted object on the scale, set one of the switches of the settable switches in response to placing the weight on the scale and set the switches in response to the instructions displayed on the display to store the selected average reading in the settable switches. The method is repeated for a second weight.
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Citations
13 Claims
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1. In a system for weighing a weighted object including a scale for outputting digital signals representing the weight of the object, a processor connected to the scale, first and second sets of settable switches in which the switches are manually settable by the operator to a first or second position representing the binary bit of a digital value and a display connected to the processor, a method for calibrating the scale comprising the steps of:
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manually setting the first set of settable switches to a first position; applying power to the system; displaying instructions by the processor on the display for the operator to place a weighted object on the scale; manually placing the weighted object on the scale to put the scale in a first weighted condition; performing a first sampling operation of the output of the scale by the processor to generate first digital signals representing the weight of the weighted object; comparing the first digital signals with the setting of the first set of settable switches; displaying instructions by the processor on the display identifying the settings of the first set of settable switches to represent the first digital signals; and manually setting the first set of switches in accordance with the instructions displayed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. In a system for weighing a weighted merchandise item, including a scale for outputting digital signals representing the weight of the merchandise item placed on the scale, a processor connected to the scale, first and second sets of settable switches in which the switches are settable to a first or second position representing the binary bit of a digital value and a display connected to the processor, a method for calibrating the scale comprising the steps of:
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manually setting the first and second set of settable switches to a first position; applying power to the system; displaying instructions by the processor for the operator to place a weighted object on the scale; manually setting a switch in said set of first settable switches; sampling the output of the scale a first number of times to generate first digital signals representing the the weight of the weighted object; summing the first digital signals sampled; dividing the sum by the first number of times the scale output was sampled to obtain the first average of the first digital signals representing the weight of the weighted object; storing the first average of the first digital signals; sensing the first set of settable switches to see if a switch has been operated; displaying instructions by the processor to remove the weighted object from the scale placing the scale in a second weighted condition in response to the processor sensing that a switch in said first settable switches has been operated; manually operating a switch in said second set of settable switches; sampling the output of the scale a second number of times to identify second digital signals representing the weight of the second weighted object; summing the second digital signals sampled; dividing the sum by the second number of times the scale output was sampled to obtain a first average of the second digital signals representing the weight of the second weighted object; repeating the sampling of the output of the scale when the first and second objects have been placed on the scale to obtain a second average of the first and second digital signals representing the weight of the first and second weighted conditions of the scale respectively; comparing the second average of the first and second digital signals with the corresponding first average of the first and second digital signals to determine whether said compared second average is similar to the first average by less than a first predetermined weight; comparing the second average of the first and second digital signals with the settings of the first and second set of settable switches respectively when said second average is similar to said first average by less than said first predetermined weight; displaying instructions by the processor on the display identifying the settings of the first and second set of settable switches to represent the second average of the first and second digital signals respectively; and manually setting the first and second set of settable switches in accordance with the instructions displayed on a display. - View Dependent Claims (13)
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Specification