Quality identification standards for electronic balances

      A balance that weighs based on the principle of electromagnetic force or electromagnetic torque balance is called an electronic balance. An analytical balance is an instrument for accurately weighing a certain mass of substance. Before weighing, check whether the balance is normal, whether it is in a horizontal position, whether the lifting lugs and ring codes are off, and whether the inside and outside of the glass frame are clean.

      Measure the performance parameters of an electronic balance: stability, linearity, repeatability, agility, and service life.

      Electronic balances can be divided into three categories according to the sensors used in the structure, strain sensor electronic balances, ceramic (raw materials: non-metallic minerals) sensor electronic balances, and magnetic electronic balances. The strain type electronic balance has a small range and low precision (accuracy). The ceramic sensor electronic balance has a large measuring range and low precision. The electromagnetic force balance uses the principle of electronic magnetic force, which has the characteristics of high precision and stable performance, but the measuring range is not high.

     1. Linearity correctness: refers to the correctness of each point of the electronic balance within the weighing range. Note: The electronic balance consists of several weighing points within the weighing range. For example, a 300g electronic balance consists of 0.1g, 0.11g, 0.12g, 0.13g, 0.14g, 1.00g, 1.13g, 5.00g, 10.00g, 20.01g.... to 299.99g, 300.00g and other points. The more weighing points to measure when purchasing, the better electronic balance you can buy. Electronic balances with poor quality are only correct at the weight calibration point, and other weighing points may have large differences. Each weighing point can be measured with a scale weight. The higher the accuracy level of the weight, the more accurate the weighing point can be evaluated.

     2.Stability: In the electronic balance, the stability can be divided into: instant stability and long-term stability (creep). Instantaneous stability means that the value displayed by the electronic balance is immediately displayed and maintained after the balance is placed on the measured object. constant. Long-term stability: It means that the electronic balance does not change much in the ambient temperature, and maintains a uniform difference in the weight of the measured object in different time periods for a long time after power-on. The smaller the difference between the above parameters, the better the performance of the electronic balance.
     
     3. Repeatability: In the electronic balance, it means to unify the weight of the measured object, repeat the weighing many times, and display the difference between the values each time. The smaller the difference, the better. Such as: 50.00g, 50, 01g, 49.90g, 49.99g, 50.10g, the smaller the difference between them, the better.
    
     4. Service life: The length of use refers to the expected period for the enterprise to use the fixed assets, or the number of products or services that the fixed assets can produce. Analytical balance is an indispensable important instrument in quantitative analysis work, and generally refers to a balance that can accurately weigh to 0.0001 gram (0.1 mg). Electronic balance People call the balance that uses electromagnetic force to balance the gravity of the object being called an electronic balance. It is characterized by accurate and reliable weighing, fast and clear display, automatic detection system, simple automatic calibration device and overload protection device. The longer the life span, the better. Customers can propose to the supplier the warranty period of the electronic balance and other characteristics to measure the life of the electronic balance
        
    5. Dexterity: In electronic balances, it refers to the time limit of resolution and resolution reflection. Resolution refers to the verification division value e or display resolution d. The smaller the value, the better (extremely high agility). Reflecting the time limit, the shorter the time for the value of the electronic balance to increase by one agility value after adding one agility value, the better. We think that the electronic balance responds quickly and has high agility.