In the verification (test), we found that the first measurement of the balance had a large error, and the reason was investigated.

A considerable part of the instrument has not been calibrated for a long time interval, and it is believed that the balance can be weighed directly after displaying the zero position. (It should be pointed out that the electronic balance displays zero when it is turned on.

It does not mean that the accuracy of the weighing data of the balance meets the test standard, but only that the stability of the zero position of the balance is qualified. Because to measure whether a balance is qualified or not, it is necessary to comprehensively consider other technical indicators

Target compliance). Due to long storage time, location movement, environmental changes or in order to obtain accurate measurements, the balance should generally be calibrated before use. Calibration method is divided into internal calibration

And external calibration. If you do not read the instructions carefully before use

It is easy to ignore the "calibration" operation, resulting in larger weighing errors.

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