scale error electronic scale calibration, gravity acceleration.
HENGQUASI:2017-02-25 17:13:49

Electronic scales are not allowed to adjust the weight of electronic scale error electronic scale calibration, gravity acceleration.
China's vast territory, latitude span, geological structure is complex, the acceleration of gravity increases with latitude, with the increase in altitude and reduce the land in the north-south latitude between the span of about 32. , The change of gravity acceleration dg / g can reach about 0.27%; altitude difference of 4000m, gravity acceleration change dg / g about 0.34%. The influence of the weaker weighing accuracy of the electronic weighing area
For example, in Shanghai produced 30kg electronic scale in Beijing display value: 30kg standard weight display 29.980kg, is in Beijing electronic scale display value than the standard weight of less than 20g, the average error of -0.7045 / 1kg. Such a large amount of change can not be ignored. As the accuracy of China's electronic weighing instrument for the III level, this 30kg electronic scale in the Shanghai area is qualified in the Beijing area on the tolerance, so that the accuracy of the instrument can not be guaranteed.