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1. US4760539 - Method of calibrating a weighing apparatus

Office
United States of America
Application Number 06868925
Application Date 27.05.1986
Publication Number 4760539
Publication Date 26.07.1988
Grant Number 4760539
Grant Date 26.07.1988
Publication Kind A
IPC
G01G 19/04
GPHYSICS
01MEASURING; TESTING
GWEIGHING
19Weighing apparatus or methods adapted for special purposes not provided for in groups G01G11/-G01G17/138
02for weighing wheeled or rolling bodies, e.g. vehicles
04for weighing railway vehicles
G01C 25/00
GPHYSICS
01MEASURING; TESTING
CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
25Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
G01G 23/00
GPHYSICS
01MEASURING; TESTING
GWEIGHING
23Auxiliary devices for weighing apparatus
G01G 23/01
GPHYSICS
01MEASURING; TESTING
GWEIGHING
23Auxiliary devices for weighing apparatus
01Testing or calibrating of weighing apparatus
G01G 23/18
GPHYSICS
01MEASURING; TESTING
GWEIGHING
23Auxiliary devices for weighing apparatus
18Indicating devices, e.g. for remote indication; Recording devices; Scales, e.g. graduated
G01G 23/37
GPHYSICS
01MEASURING; TESTING
GWEIGHING
23Auxiliary devices for weighing apparatus
18Indicating devices, e.g. for remote indication; Recording devices; Scales, e.g. graduated
36Indicating the weight by electrical means, e.g. using photoelectric cells
37involving digital counting
CPC
G01G 23/3707
GPHYSICS
01MEASURING; TESTING
GWEIGHING
23Auxiliary devices for weighing apparatus
18Indicating devices, e.g. for remote indication; Recording devices; Scales, e.g. graduated
36Indicating the weight by electrical means, e.g. using photoelectric cells
37involving digital counting
3707using a microprocessor
G01G 23/01
GPHYSICS
01MEASURING; TESTING
GWEIGHING
23Auxiliary devices for weighing apparatus
01Testing or calibrating of weighing apparatus
Applicants NCR Corporation
Inventors Amacher Gene L.
Mathes Gene R.
Paugstat John F.
Agents Hawk Wilbert
Sessler Albert L.
Lavin Richard W.
Title
(EN) Method of calibrating a weighing apparatus
Abstract
(EN)

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.