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Electronic balance weight is an important measuring instrument in daily life, widely used in industries such as medicine, chemistry, machinery, aviation, automotive, and petroleum. Electronic balance weight determines the mass of an object by measuring the force of gravity acting on it and provides digital output results. It is mainly used for mass transfer of weights, mass measurement of objects, volume measurement, and magnetic measurement. When calibrating, calibrating, and verifying the capabilities of the electronic balance weight, it is necessary to consider the uncertainty parameters introduced by different factors to ensure the accuracy of measurements, traceability of values, and value transfer of the electronic balance weight. Therefore, assessing the uncertainty of electronic balance measurements is very important.
The electronic balance scale is mainly made using the principle of electromagnetic force balancing gravity. According to relevant studies, the strain gauge sensor is an important component of the entire electronic balance scale measurement structure, and the resistance of the strain gauge has a significant impact on the measurement data. When the electronic balance scale is idle, the resistance values should remain the same to ensure that the data is zero across the entire circuit after the power is applied, transmitting different voltages from different areas to the amplifier. When the scale is loaded, the strain gauge will be stretched by the material on the scale, causing the resistance to change accordingly. This voltage will eventually be displayed on the amplifier, and its data should represent the weight of the load on the scale.
The electronic weighing scale is a non-standard scale. Due to the influence of production manufacturing processes and the performance of the weighing sensor, the accuracy of the electronic weighing scale is usually not very high, generally around 1% to 0.5%. Electronic weighing scales are suitable for internal settlement or production process control weighing measurements in factory enterprises.
Distinguished by usage, the result is "mass" for the balance, while just "weight" is for the scale.
Distinguished by different sensor structures, the electronic balance scale uses electromagnetic balance sensors, while electronic weighing scales generally use strain sensors.
According to the verification regulations. Due to the difference in the technical committees overseeing the two, there are separate verification regulations for electronic weighing scales and electronic balance scale, but in practice, the verification methods for both are basically the same. The inconsistency between the verification regulations is because the accuracy requirements for electronic balance scales are slightly higher, so the verification environment requirements are relatively stricter, making the electronic balance scales more accurate and stable than electronic scales. Electronic balance scales generally need to be preheated for a period of time before verification, while electronic weighing scales do not. Another difference is that due to the expansion of the single-digit division, electronic balance scales do not require the use of additional small weights to detect specific errors during verification and testing, making the verification of electronic balance scales much more convenient than that of electronic weighing scales. The different verification values, verification division numbers, and minimum scale quantities between electronic balance scales and electronic scales also result in some differences in their verification methods. For example, in the selection of standard weights, the standard weights selected for the verification of electronic balance scales are generally above level three, while the standard weights used for the verification of electronic weighing scales are generally above level five.
Differences in verification accuracy and scale range between the two. Electronic balance scales focus on high accuracy and small scale (small scale quantity), while electronic weighing scales focus on low accuracy and large scale (large scale quantity). Although the accuracy levels of electronic balances are divided into four levels: I, II, III, IV, the commonly used electronic balances are mainly levels I and II, while electronic weighing scales are only divided into levels III and IV.
