When repairing electronic analytical balances, it's essential to be aware of some maintenance precautions.
1. The new product to be launched includes the heart of the electronic balance, the gravity electromagnetic sensor leaf spring (usually consisting of 618 leaves), which is thin and fragile. The thinner the leaf spring, the higher the precision of the balance. Therefore, extreme caution should be taken to protect the sensor during use. Avoid weighing objects beyond the balance's capacity, and never apply pressure to the weighing pan by hand or drop the balance to prevent damage or alter the performance of the gravity sensor. Additionally, when handling particularly heavy objects, the weighing pan and its tray should be removed. Generally, the handling and transportation of an object should not exceed 30 seconds.
2. An electronic balance is an instrument that measures the gravitational force exerted by the Earth on an object placed on the weighing pan, and due to the varying latitude and longitude of the Earth, the local gravitational acceleration (ranging from 9 to 9.8 m²/s) is not uniform. The accuracy of the measurement in a particular location depends on whether a proper calibration has been performed and the precision of the calibration weights. If you find that there is some error in the weight measurement on a well-calibrated balance in your local area, it does not indicate a fault with the balance. Please follow the instructions in the user manual for your specific model and use standard weights approved by the metrological department for calibration to ensure accurate weighing.
3. Calibration mechanisms for electronic balances are generally divided into three main categories:
Fully Automatic Calibration: With integrated standard weight and motorized servo mechanism, calibration can be completed in just a few seconds by pressing a single function key. Generally, modern electronic balances with precision above one part per million (ppm) commonly use fully automatic calibration systems.
Semi-Automatic Calibration: Equipped with standard weights but without a servo mechanism, the calibration process requires manual loading and unloading of calibration weights after entering the calibration program.
Manual Calibration: Scales without standard weights and servo mechanisms require manual entry into the calibration program and the addition of standard weights for calibration. Generally, scales with lower precision use manual calibration.
4. An electronic balance is a highly sensitive precision electronic measuring instrument to the environment. It should be handled with care; the installation surface should not have any obvious vibration, and it should not be placed near an air conditioning vent. If these conditions cannot be met, some improvement measures should be taken, such as changing the location of use and installing windproof ink. At the same time, attention should be paid to adjusting the bottom angle screws to center the bubble of the level indicator. An unadjusted level on the balance is also one of the causes of weighing errors.
