Patent ID: 9097574
Filing Date: 2015-08-04
Classification: G01G

Abstract:
1. A method for calibrating a large fixed electronic scale, said method being a verification method which applies an auxiliary verification device to calibrate said large fixed electronic scale without using a weight, characterized in that said verification method includes steps of: step 1: loading and unloading every supporting point on a scale table board of said scale by at least four self-locating loading and unloading mechanisms; step 2: applying at least four high accuracy load gauges to measure and display a load that each of said loading and unloading mechanisms applies to said scale table board; step 3: applying a constant load control device to control a size of said load that each of said loading and unloading mechanisms applies to said scale table board and further control a size of a load of each supporting point on said scale table board so that said load of each supporting point corresponds to a required load applied to each of said supporting points while calibrating said scale; and step 4: comparing a precise load displayed by said high accuracy load gauges with a gauge weighing display value of said scale to obtain a calibration error of said scale wherein in said step 2, said high accuracy load gauges are respectively disposed above said loading and unloading mechanisms so that said high accuracy load gauges and said scale table board are concurrently subjected to a load with a same force and said load is displayed when said scale table board is loaded by said loading and unloading mechanisms, an accuracy of said high accuracy load gauges is at least three times larger than an accuracy of said scale required to be verified.