Use electronic balance to pay attention to four points

One is to warm up in advance. Electronic balances usually need to be warmed up before use, and the warm-up time of each balance is often different. In general, the higher the level of accuracy of the balance, the longer the required warm-up time, according to the requirements in the manual of the balance. Preheating, if necessary, can increase the warm-up time (usually the lower the ambient temperature, the longer the warm-up time). In fact, many users are ready to use when they use the balance. This does not guarantee the measurement performance of the balance. Therefore, the electronic balance warm-up is the key to accuracy.

The second is environmental conditions. Environmental conditions are also an important factor affecting the metrological performance of electronic balances. If no special temperature limit is specified in the operating instructions of the electronic balance, the balance should work normally at a temperature of -10°C to 40°C; if a special temperature limit is specified, the balance should work at the specified temperature; electronic Balances also have requirements on the humidity of the environment. For example, a class I balance requires a relative humidity of no more than 80%.

The third is the horizontal state. Generally, high-precision electronic balances have level adjustment devices and levelers. During use, the level of the balance should always be checked. In fact, some users often overlook the check on the level of the balance (the electronic balance is often uneven or not horizontal due to movement or other reasons). This is also the main reason why the balance data is not accurate.

The fourth is to calibrate at any time. Some people think that after passing the periodic verification, the electronic balance is accurate within the validity period, and often neglects the importance of calibration, and even does not perform calibration. As everyone knows, in the use of electronic balances due to changes in environmental conditions, human factors and other factors, measurement performance from time to time will be subtle changes, which requires our daily use in the calibration. So, how do we calibrate? Electronic balances should be calibrated daily or before each use, and the frequency of calibrations can be increased if necessary. Calibration weights, in theory, the higher the level the better, generally should use the weight error is not greater than 1/3 of the maximum allowable error of the scale, and should be regularly sent to the quality supervision department to check, if found that the error exceeds the standard, It is necessary to send timely inspections to the quality supervision department so as to avoid losses and the phenomenon of harming consumers. China Quality News