The accuracy level of the weighing machine is divided in this way
According to the International Proposal No. 60 of the International Legal Metrology and Inspection Agency (OIML), the weighing machine can be divided into 4 accuracy levels: a, b, c, and d according to its comprehensive performance. The upper and lower limits of each grade are required. The maximum score of a sensor with a clear accuracy level is indicated by 1000 for the company. Weighing machine. For example, C3 displays 3000 minutes of C-class weighing machine. Sensors used in general trade measurement verification must be of C3 level. In other words, 3000 points. For example, a 30t weighing machine, assuming that its measurement verification score is 3000, its measurement verification score value is 10kg. Suppose his measurement verification score is 2500, and his measurement verification score value is 12kg. Assuming that under the measurement verification result of 3000, the sensor complies with the requirements of the national industry standard, and the sensor's grade is C3. If only the metrological verification meets the requirements within 2500 minutes, the sensor is rated C2.5. If the lower score is 1000, the sensor is C1, and the measurement verification score is 30kg. Selection of the appropriate level. In the whole process of selecting a weighing machine, the accuracy level of the sensor is also a key index value, which jeopardizes the accuracy of weighing. First of all, be sure to consider the typing rules for the weighing display. Bring in the following formula to calculate whether the sensor is consistent with the instrument panel. Weighing indicator u0026 weighing display. The output sensitivity of the sensor * encourages the power supply voltage * to weigh larger, the scale's sub myopia * the number of sensors * the measuring range of the sensor. The output data signal of the sensor should not be clear about the key-in data signal specified by the instrument panel. Assuming that a certain amount is 25kg quantitative packaging machine, the scale with a larger performance of 1000 minutes uses 3 sensors, the amount is 25kg, the sensitivity is 2.0±0.008mV/V, and the scale with arc working voltage 12V uses a weighing instrument. Find out if the sensor and the dashboard are the same. Reading the materials, I found that the input data signal of the instrument panel is 2x12x25/1000x3x25u003d8μV/d>0.6μV/d. Therefore, they are the same.
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