Project background:

In the precision weighing process of medical laboratories, the one-in-ten-thousandth precision electronic balance is often "inaccurate" due to electrostatic interference ". Especially in the dry season, when the ambient humidity is lower than 40%, the medical test tube is easy to carry static electricity due to high insulation and friction during handling, resulting in continuous drift and beating of the balance reading, and the milligram weighing error significantly exceeds the standard, seriously affecting the reliability of experimental data.

Cause analysis:

The electrostatic charge creates an additional electrostatic field between the test tube and the balance, creating a non-gravitational interference that makes the weighing result difficult to repeat stably. In order to completely crack these 1 bottlenecks, the laboratory introduced space static eliminator as the core countermeasure, and cooperated with systematic auxiliary measures to build a comprehensive anti-static system.

Solution:

The space static eliminator relies on high-voltage electric field to ionize the air, continuously generates a large number of positive and negative ions, covers the weighing area through Coulomb force, quickly neutralizes static electricity on the surface of the test tube, and creates a stable static-free weighing environment. At the same time, the laboratory strictly controls the environmental humidity at 45%-60% RH to ensure the effective grounding of the electronic balance and standardize the operation process. Personnel are required to wear anti-static wrist straps and cotton work clothes, and release static electricity from the human body before contacting the equipment.

Implementation effect:

Under the comprehensive management, the static electricity on the test tube surface can be quickly eliminated, the balance reading is immediately stable, and the weighing repeatability and accuracy are greatly improved. This not only ensures the accuracy of the experimental data, but also significantly reduces the sample waste and experimental rework caused by weighing deviation, laying a solid foundation for high-quality scientific research and testing work.