Millipore Cleanliness Testing Nylon Mesh Filter Membrane

Millipore Cleanliness Testing Nylon Mesh Filter Membrane

Different industries and substances have different standards for cleanliness. The air cleanliness level is a classification standard based on the maximum concentration limit of particles with a particle size greater than or equal to the considered particle size per unit volume of air in a clean space.

Method for measuring cleanliness

Method for measuring cleanliness

The cleanliness measurement method is very important for process control, * and failure analysis, and is used to obtain information about the measurement subject such as various machines

The detailed process of cleanliness data for mechanical equipment, electronic components, etc.

When testing cleanliness, there are requirements for sampling, and the basic requirements for sampling depend on the quantity and location of the samples. The larger the volume and surface area of the component

The larger and lower the cleanliness, the corresponding reduction in sample quantity. Parts should be randomly selected from production, and the sampling process and subsequent inspection process should be carried out

Cannot cause contamination of parts in the middle

When testing cleanliness, the environment must be clean, and its cleanliness level should be suitable for the testing requirements; Secondly, it is necessary to check the cleanliness of personnel's clothing, hats, and hands;

The equipment used for the three requirements must also be clean.

At present, in the industry standards and specific requirements that have been approved by the Ministry of Aeronautics and Astronautics, the Ministry of Machinery, the Ministry of Railways, and other departments in China, the commonly used matching symmetry is

Heavy law. The complete set of equipment introduced by our company is a complete set of testing equipment using the weight method

Method for measuring cleanliness

There are many, mainly including the following:

Visual inspection method

The visual inspection method involves manually inspecting the visible outer or inner surface of a component under a microscope using the eyes. Adjusting microscope

The illumination brightness and magnification of the mirror can manually determine whether the pollutant particles are metal, non-metal, or fiber, as well as their size. Visual inspection method can be used to check

Check for relatively large and obvious particles, spots, rust stains, and other contaminants remaining on the surface of the parts, but the results of the inspection are closely related to human factors

Millipore Cleanliness Testing Nylon Mesh Filter Membrane