The accuracy test of mechanical scales is an important part of evaluating their weighing accuracy. It aims to verify whether the weighing results of mechanical scales in actual applications meet their nominal accuracy and analyze their weighing stability under different conditions. Accuracy tests are usually divided into two methods: static test and dynamic test, each with its own characteristics and suitable for different testing needs.

Static test is carried out under fixed conditions. By weighing the mechanical scale multiple times and comparing the differences in the weighing results, its accuracy and repeatability are evaluated. During the test, standard weights that meet national or industry standards need to be selected and placed on the mechanical scale for weighing. The readings of each weighing need to be recorded in detail. By comparing the differences in the weighing results, the error range of the mechanical scale is calculated to evaluate its accuracy performance. In addition, repeating the weighing operation of the same weight can effectively observe the repeatability of the mechanical scale and ensure its consistency in multiple weighings.

Dynamic test is carried out under changing conditions, aiming to evaluate the weighing accuracy and stability of the mechanical scale under different load, speed or direction conditions. This test method is closer to the actual application scenario and can fully reflect the performance of the mechanical scale. For example, weights of different weights can be placed and removed continuously on a mechanical scale to observe the changes in weighing to evaluate its response speed and stability. This test is particularly important for applications that require frequent changes in load.

When conducting a mechanical scale accuracy test, a series of standardized steps must be followed. First, ensure that the mechanical scale is in a horizontal and stable working state to avoid the influence of external interference on the test results. Second, use standard weights that meet national standards or industry standards to ensure the accuracy and comparability of the test results. During the test, strictly follow the established method, record the readings of each weighing, and pay attention to the response of the mechanical scale and the changes in the indicator. Finally, analyze and process the test results, calculate the error range and repeatability index of the mechanical scale, and comprehensively evaluate its accuracy performance.

Mechanical scale accuracy testing should follow industry standards, which are usually formulated by countries or industry associations to standardize test methods and evaluation indicators. For example, in international trade, the accuracy test of mechanical scales usually follows the relevant standards formulated by the International Organization of Legal Metrology (OIML). These standards specify in detail the test conditions, test methods, error ranges and result processing methods to ensure the accuracy and comparability of the test results.