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Selection And Use Of Electronic Balance

December 09, 2020

Selection And Use Of Electronic Balance

Because many users do not properly select and use electronic balances, the electronic balances do not meet the actual requirements, which affects normal inspection work and causes waste. This article combines the technical characteristics of electronic balances and briefly introduces the selection and use requirements of electronic balances.

Weighing requirements

Choosing an electronic balance depends on whether the range of the balance meets the weighing requirements. Generally, the maximum load in common use plus an insurance factor of about 20%. The larger the range is not the better, because the larger the range of a balance with the same accuracy, the higher the requirements on the balance sensor and auxiliary equipment, and the more expensive it is.

Accuracy requirements

To choose an electronic balance, you should first consider whether the scale of the corresponding balance meets the accuracy requirements of weighing. When selecting the division value of the electronic balance, you should refer to the verification division value e given by the manufacturer instead of the actual division value d. The current national metrological verification regulations stipulate that whether a balance is qualified is measured by the verification graduation value, and the allowable error range is (0.5~1.5)e.

Environmental requirements

for the use of electronic balances Electronic balances are easy to use. Most electronic balances have calibration functions, so the environmental requirements are not very demanding, and the following conditions are sufficient:

1. The temperature in the working room should be constant, preferably around 20℃, and try to avoid direct sunlight to the balance.

2. The humidity in the working room should be within (45~75)%.

3. There is no vibration or air current around the balance that affects the performance of the balance.

4. The balance should be far away from heat sources and magnetic fields.

5. The workbench should be firm and level. 6. The working room should be clean and free from corrosive gas.

Precautions for using electronic balance

1. The external power supply of the electronic balance should be consistent with the local voltage, such as 220V or 110V.

2. When installing or transporting the balance for the first time, pay attention to removing or installing the transportation protection parts of the balance. (Some balances do not have this device).

3. After the balance host and various accessories are installed, pay attention to observe whether the various components are in place. Especially the dust-proof board and wind-proof ring cannot rub against the balance. Otherwise it will affect the accuracy of the balance indication.

4. Adjust the leveling foot of the balance to adjust the balance to a level state. (You can observe the horizontal device on the balance)

5. Turn on the power supply to warm up the balance for at least half an hour or longer according to the instructions.

6. Start the balance calibration program (self-calibration or external calibration) according to the manual method, and calibrate the balance regularly. (The electronic balance will lose its original accuracy due to changes in temperature and other conditions, so it needs to be calibrated frequently, especially after it is newly installed or not used for a period of time)

7. Do not use overload when operating the balance to avoid damage to the balance.

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