Electronic balance use precautions

Electronic balances are divided into precision balances, analytical balances, ordinary balances, imported balances, and one-tenth of a day. Shanghai Hengto engineers here to introduce you to the use of electronic balances:

First, preheating in advance:

Electronic balances usually require preheating before use, and the handheld electronic scales of each balance often have different warm-up times. Generally speaking, the higher the accuracy level of the balance, the longer the warm-up time required, according to the balance instructions. The requirement is to preheat and extend the warm-up time if necessary (usually the lower the ambient temperature, the longer the warm-up time). In fact, many users are ready to use when using the balance, which does not guarantee the metering performance of the balance. Therefore, electronic balance warm-up is the focus of accuracy.

Second, environmental conditions:

Environmental conditions are also an important factor affecting the metering performance of electronic balances. If no special temperature limit is specified in the operating instructions of the electronic balance, the balance shall work normally at temperatures between -10 ° C and 40 ° C; if a special temperature limit is specified, the balance shall be operated under the specified temperature conditions; The balance also has requirements for the humidity of the environment. For example, a level I balance requires a relative humidity of no more than 80%.

Third, the level:

Generally, high-precision electronic balances are equipped with leveling devices and leveling devices. During use, the level of the balance should be checked frequently. In fact, some users often neglect the inspection of the level of the balance (the electronic balance often causes unevenness or unevenness due to movement or other reasons), which is also the main reason for the inaccurate data of the balance.

Fourth, calibration at any time:

Some people think that after the periodical verification, the electronic balance is accurate within the validity period, and often ignores the importance of calibration, even without calibration. As everyone knows, electronic balances often change slightly in measurement performance due to environmental conditions, human factors, etc., which requires us to calibrate them in daily use. So, how do we calibrate our portable electronic scales? The electronic balance should be calibrated daily or before each use, increasing the frequency of calibration if necessary. The weight used for calibration is theoretically the higher the level, the better. Generally, the weight error should be no more than 1/3 of the allowable error of the balance, and should be sent to the quality supervision department for regular inspection. If the error is found to exceed the standard, It is necessary to promptly send it to the quality supervision department for testing, so as to avoid the loss and the phenomenon of pitfalling consumers.

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