ACCURATEWT| How To Choose Necessary Calibration Weight You Need

In the scale weighing, The selection and use of weights are key steps to ensure the accuracy of measurements. In the purchase of weights, the first step is to confirm whether the weights will be used for balance calibration or measurement. Different weights should be chosen depending on whether they are for balance calibration or measurement, for example, different accuracy of the balance need to choose different levels of weights to ensure that the measurement of the accuracy of the calibration weights should be higher than the accuracy of the balance in principle, etc. For the same range, several can share a set of weights, such as the E2 grade set you buy, then the same range of 100,000 parts, 10,000 parts, thousand parts, thousand parts.For the same range of the balance, several can share a set of weights, such as the weights you buy is the E2 grade set, then the same range of the 100,000, 10,000, thousand, percent \ tenths of the balance can be calibrated with this set!

The number of calibration divisions is an important parameter for measuring the resolution of a balance.Different precision balances should be selected according to their resolution of the corresponding weights level.

The magnetization rate and maximum polarization strength of weights are also important parameters when selecting weights. Since most balances use the principle of electromagnetic balancing, the magnetic interaction between weights and electronic balances will affect the weighing results.According to OIML-R111-1 (2004), the magnetization rate M of a weights is expressed by the polarization strength μ0M, which must not exceed the maximum values in Table 2, given in Table 1, which must not be exceeded.

If all measured values of the polarization strength and magnetization of the weights are less than these limit values, the uncertainty components due to the magnetic properties of the weights can be considered negligible.

The density of weights materials and their uncertainty have a significant impact on measurement accuracy. Weights made from different materials have different densities, which can lead to variations in volume and characteristics. For example, stainless steel weights have good corrosion resistance and can maintain long-term stability to ensure measurement accuracy. Cast iron weights are more suitable for large mass weighing scenarios, are not easily damaged, and are cost-effective. The choice of weights material should be determined based on specific needs and budget.

The density ranges of the different classes of weights should comply with the appropriate standards:

Finally, weights are selected according to the tolerance tables of the OIML and ASTM standards（ASTM weights）These standards ensure that the tolerance ranges of the weights comply with international metrological requirements, thus guaranteeing the accuracy and reliability of the measurements 

Finally, weights are selected according to the tolerance tables of the OIML and ASTM standards（ASTM weights）These standards ensure that the tolerance ranges of the weights comply with international metrological requirements, thus guaranteeing the accuracy and reliability of the measurements  

In conclusion, when selecting weights, it is essential to choose based on the actual use scenario and budget. If you have any further questions, please feel free to contact us through our website. Accrete is a professional weights manufacturing company with 14 years of experience in the metrology industry. We can help you choose the appropriate weights or provide custom solutions based on your needs.