Sharp wind analysis how to reduce the error of electronic balance

In the test (test), we found that the error is relatively large when the balance is first measured. The reason is that a considerable part of the instrument does not perform calibration within a long time interval, and it is considered that the balance display zero can be called directly. the amount. (It should be pointed out that the electronic balance shows a zero chance to show that the accuracy of the balance weighing data does not meet the test criteria, only that the zero stability of the balance is a good one, because it is not only qualified to measure a balance, but also It is necessary to comprehensively consider a compliance of other technical indicators). Because the storage time is long, the position is moved, the environment changes or the accurate measurement may be obtained, and the balance should generally be calibrated before use. The calibration method is divided into internal calibration and external calibration.
Most manufacturers of electronic balances will have calibration devices. If you do not read the instructions carefully before using them, it is easy to ignore the “calibration” operation, resulting in a large weighing error.
How to calibrate the balance. Method: Press the CAL key lightly. When the display shows CAL-, it will let go and the display will show CAL-100. The "100" is the flashing code, which means that the calibrated weight needs to use the standard weight of 100g. At this time, we must put the "100g" calibration weight on the plate, and the display will show "----" waiting state.
After a long period of time, the display appears 100.000g. Take the calibration weight. The display should show 0.000g. If it is not zero, clear it again and repeat the above calibration. (Note: It is best to repeat the above calibration procedure twice in order to obtain accurate calibration results.)
Methods as below:
The balance is set to zero, then hold down the "CAL" key until CALint appears. The following conditions will be displayed during calibration:
The balance is set to zero. The internal calibration weight is loaded. The balance is re-checked. The balance is reported. Calibration process. Balance report The calibrated balance automatically returns to the weighing state. Some people think that the heavier the object being weighed in the electronic balance range is, the heavier the damage will be to the balance. The bigger it is. This understanding is very incorrect. The maximum safety load of a typical weighing instrument is the maximum static load that it can withstand without causing permanent changes in its metering performance. The circuit principle of electromagnetic force automatic compensation, when the weighing pan is loaded (be careful not to exceed the weighing range), the electromagnetic force will push the weighing pan back to the original equilibrium position, so that the electromagnetic force balances with the gravity of the object being weighed. , as long as the size of the scale within the allowable range has little effect on the balance, it will not affect the accuracy of the electronic balance due to long-term weighing.
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