Calibration of electronic balance
2014/10/27 Viewers:
(be sure to read the instructions carefully before use), in the test (test) we found, for the first time measurement on scales larger errors, investigate its reason, a considerable part of instrument, was not calibrated in a longer time interval, and that balance zero can be directly weighing. (to be pointed out is that the electronic balance, boot display zero, can not explain the balance data accuracy can meet thetest standard, only shows that qualified balance zero stability. Because the measure of a balance is qualified or not, also should be considered compliance other technicalindicators). For longer storage time, position, changes in the environment or to obtain the accurate measurement, the balance in the use of generally shall be calibrated operation. Calibration method for internal calibration and external calibration two.German production sartorius, Swiss Mettler, Shanghai produced "JA" series ofelectronic day average calibration device. If you don't read the instructions carefullybefore use, it is easy to overlook the "calibration" operation, resulting in a larger weighing error. Here in Shanghai balance instrument factory JA1203 electronic balance as an example to illustrate how to external calibration of msbs. Methods:press CAL button slightly when the display CAL-, namely, let go, the display will appear CAL-100 the "100" is flashing code, said standard weight calibration weightswith 100g. This time the ready to "100g" calibration weights placed on said disc,appears in the display of "--" wait state, after a long time after the emergence of 100.000g to display, calibration weights, display should appear 0.000g, if not zero,then cleared, repeat the calibration operation. (Note: in order to get the accurate calibration results best repeat the calibration steps two times.) In Swiss MettlerToledoAG series electronic balance as an example to illustrate how to balance calibration.The method is as follows: balance zero position, and then press and hold the "CAL"button until the CAL int appears, the following will be at school on time display: balance to zero, the completion of the loading of internal calibration weight, balance,balance report re check the zero calibration process, balance calibration is completed,the balance report automatically revert to the weighing state. 1, some people think that the electronic balance weighing in the range object more weight to balance the damage is greater. This kind of understanding is not entirely correct. The general weighing maximum safe load it can bear, resulting in its measurement performance of maximum static load permanent change. Because the electronic balance usingelectromagnetic force compensation circuit principle, when the scale loading (be careful not to exceed the weighing range), the electromagnetic force will scale backthe original balance position, so that the electromagnetic force and the gravity of the weighed object phase equilibrium, as long as the effects of the allowed rangeweighing big small on balance is very small not because of the long-term effects, the weighing accuracy of electronic balance.
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