Measurement method of micro-weighing electronic scale

Abstract

The invention belongs to the technical field of measurement, and particularly relates to a measurement method of a micro-weighing electronic scale. The method comprises the steps that: an electronic scale is placed in a special measurement laboratory, after the electronic scale is placed horizontally, and air in the measurement laboratory is humidified by an air humidifier, so that it is guaranteed that the humidity of the air ranges from 45% to 60%; a sample is put into a standard container by using tweezers, and the container is immediately sealed by using a sealing cover; then the standardcontainer is placed on a weighing platform of the electronic scale by using special tweezers within 0-3 minutes, so that it is ensured that hands are not in direct contact with the sample and the surface of the weighing platform of the electronic scale in the taking and placing process; and finally, the sample is measured for three to five times, and an average value of multiple times of data is taken as final measurement data. According to the measuring method, the stability of the sample is ensured by weakening the magnetic force and static electricity of the sample, and a baffle arranged onthe electronic scale is matched to block airflow to a certain extent, so that the accuracy of a micro-weighing result is ensured.

Description

technical field [0001] The invention belongs to the technical field of measurement, in particular to a method for measuring a micro-weighing electronic balance. Background technique [0002] An electronic scale is a kind of weighing instrument, which is a tool for measuring the mass of an object by using Hooke's law or the principle of lever balance of force. According to the structural principle, it can be divided into three categories: mechanical scales, electronic scales, and electromechanical combination scales. The electronic scale is mainly composed of three parts: a load-bearing system (such as a weighing pan and a scale body), a force transmission conversion system (such as a lever force transmission system, a sensor) and an indication system. The working process of the electronic scale is as follows: when the object is placed on the weighing pan, the pressure is applied to the sensor, and the sensor undergoes elastic deformation, so that the impedance changes, and ...

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Problems solved by technology

[0003] In the existing experimental process, it is necessary to accurately weigh a small amount of substances, and the accuracy of the weighing results greatly affects the results of chemical experiments or physical experiments. When measuring with an electronic scale, the following factors often appear to affect the accuracy of the measurement;

[0004] 1. Magnetic force; in the article "The Influence of Object Magnetism on the Weighing Accuracy of Electronic Balance" published by Liu Wei of Zhejiang Institute of Metrology in 2011, it is clearly stated that magnetic objects will affect the measuring instrument and affect the accuracy of the measured object. the accuracy of the weighing results;

[0005] 2. Static electricity; small amount of powder samples, weighing paper, and glass containers are very easy to generate static electricity due to friction

[0007] However, the measurement method of the micro-weighing electronic scale in the prior art fails to solve the influencing factors in the above-mentioned problem well, causing the accuracy of the measurement result to be greatly affected; in view of this, the present invention proposes a micro-weighing scale for the above-mentioned problem A measurement method for measuring electronic scales, using different standard containers and electronic scales in this measurement method, solves the above-mentioned problems

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