How to calibrate an electronic balance to reduce errors

How to calibrate an electronic balance to reduce errors


2009-1-5

In the verification (test), we found that the first measurement test of the balance has a large error. The reason is that a considerable part of the instrument has not been calibrated in a long time interval, and it is considered that the balance can be directly weighed by displaying the zero position. . (It should be pointed out that the electronic balance starts to display zero point. It cannot be said that the accuracy of the balance weighing data meets the test standard, and only the balance zero stability is qualified. Because it is necessary to consider the other technology when measuring whether a balance is qualified or not. Compliance of indicators). Due to long storage times, positional movements, environmental changes or for accurate measurements, the balance should generally be calibrated prior to use. The calibration method is divided into internal calibration and external calibration. It is easy to ignore the “calibration” operation, which leads to a large weighing error, when the German-produced Sitlis, the Swiss-made METTLER, does not read the instructions carefully before use.

How to externally calibrate the balance. Method: Press the CAL button when the CAL- appears on the display, the display will appear CAL-100, where “100” is the flashing code, indicating that the calibration weight requires a standard weight of 100g. At this point, put the "100g" calibration weight on the weighing plate, and the display will appear "----" waiting state.

After a long time, the display will appear 100.000g, and the calibration weight will be taken. The display should appear 0.000g. If it is not zero, then clear it again and repeat the above calibration operation. (Note: In order to get accurate calibration results, repeat the above calibration steps twice.)

How to calibrate in the balance. Methods as below:

Set the balance to zero and then hold down the “CAL” key until CALint appears. The following conditions will be displayed during calibration:

Balance zero

Internal calibration weight loaded

Balance rechecking zero

Balance report calibration process

The balance report is calibrated

The balance automatically returns to the weighing state

1. Some people think that the heavier the object weighed within the range of the electronic balance, the greater the damage to the balance. This understanding is not entirely correct. The general safety weapon zui large safety load is the large static load that it can withstand without causing permanent changes in its metering performance. Due to the principle of automatic compensation of electromagnetic force, 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 is balanced with the gravity of the object, as long as The effect of the weighing range within the allowable range on the balance is small and does not affect the accuracy of the electronic balance due to long-term weighing.

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