Control if negligible weight magnetic effect

The magnetic force of the weight in the measurement process will have a negative effect. This is because this force cannot be distinguished from gravity in mass measurement. Magnetism can not only cause the interaction between two quality standards, but also the interaction between quality standards or measuring instruments used in measurement and other magnetic objects nearby.

Before weight conversion quality verification, the magnetic properties (magnetization and susceptibility) of the quality standard should be measured to ensure that the magnetic effect can be ignored. Weights that fail the magnetic test shall not be verified for the converted quality

What is weight and magnetism: Electronic balances use high-precision sensors to achieve balance with electromagnetic force compensation, and through powerful microprocessors and high-performance A/D converters to achieve fast and accurate measurement. Because it is in the process of weighing The principle of electromagnetic balance is adopted, that is, when the balance is unbalanced, the balance is rebalanced through the change of the current in the internal coil, so a strong electromagnetic field will be generated around the balance. The weights are mostly made of stainless steel. If the electromagnetic shielding of the electronic balance is not good, and the remanence of the weight is too large, it will cause the weight in the electromagnetic field to be magnetized. The magnetized weight will not only directly affect the subsequent mass value transfer, but also Interfere with the normal use of the balance. In order to avoid and reduce the influence of the magnetism of the weight on the mass value, there are currently two solutions: one is to do a good job of electromagnetic shielding of the electronic balance to reduce magnetic leakage, but this solution will increase the balance The manufacturing cost of the weight; the second is to improve the diamagnetic performance of the weight, and the stainless steel material with lower magnetic susceptibility is used to produce the weight.

The electronic balance uses a high-precision sensor to achieve balance with the help of electromagnetic force compensation, and through a powerful microprocessor and high-performance A/D converter to achieve fast and accurate measurement. Because it uses electromagnetic balance in the measurement process The principle is that when the balance is unbalanced, the balance is rebalanced by the change of the current in the internal coil, so a strong electromagnetic field will be generated around the balance. The weights are mostly made of stainless steel, if the electromagnetic of the electronic balance If the shielding is not good, and the remanence of the weight is too large, it will cause the weight in the electromagnetic field to be magnetized.The magnetized weight not only directly affects the subsequent mass value transfer, but also interferes with the normal use of the balance. In order to avoid and reduce the influence of the magnetism of the weight on the mass value, there are currently two solutions: one is to do electromagnetic shielding of the electronic balance to reduce magnetic leakage, but this solution will increase the manufacturing cost of the balance; the other is Improve the anti-magnetic performance of the weights, and use stainless steel materials with lower magnetic susceptibility to produce weights.