What are the main factors that affect the accuracy of checkweighers?
What are the main factors that affect the accuracy of checkweighers? The degree of a checkweigher machine can be defined as: a single object is weighed several times on the checkweigher, the standard error of its weight value (premise: average error u003d 0). The mean and standard deviation are important evaluation indicators for the accuracy of the checkweigher. Average: The numerical value of a set of data and the numerical value divided by the set of data. Standard Deviation: A measure of how spread out the data distribution is, used to measure how far the data values u200bu200bdeviate from the arithmetic mean. Typically, we use ±3 times the standard deviation to define the dynamic accuracy of the scale. For a given product, under certain detection conditions, the smaller the standard deviation value, the higher the dynamic accuracy of the equipment. It needs to be clear that the dynamic accuracy must be the accuracy under the premise of a given product, a given inspection condition and a given accuracy definition method. The main factors affecting the accuracy of automatic checkweighers are: (1) Product factors. ① Product category (such as shape, solid or bottled liquid, etc.); ② Product weight; ③ Throughput (belt speed, weighing time, length of weighing table); ④ Product passing stability (weight position, bottom surface flatness, surface reflectance, etc.). (2) Environmental factors. ① temperature, humidity, etc.; ② factors such as airflow, ground vibration, and belt scratches. (3) Human factors. ① Improper use and incorrect settings; ② Machine level, etc.
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