Common Sense of Medical Testing Equipment Maintenance

Medical testing instruments are modern laboratory instruments used for disease diagnosis, disease research, and drug analysis. Their main characteristics are as follows:

1. Complex Structure

Medical testing instruments are mostly integrated instruments combining optics, mechanics, and electronics, using a wide variety of components. With the improvement of instrument automation, miniaturization, and enhanced functionality, the addition of various automatic detection and control functions makes the instruments more compact and structurally more complex.

2. Wide Range of Technologies Involved

Medical testing instruments often involve optics, mechanics, electronics, computers, materials science, sensors, biochemistry, and radiation technologies, representing the interpenetration and combination of multidisciplinary technologies.

3. Advanced Technology

Medical testing instruments consistently track the forefront of relevant disciplines. Developments in electronics, the application of electronic computers, the use of new materials and components, and new analytical methods are all reflected in medical testing instruments.

4. High Precision

Medical testing instruments are specifically used to measure the presence, composition, structure, and properties of certain substances, providing qualitative or quantitative analytical results; therefore, very high precision is required. Medical testing instruments are mostly considered precision instruments.

5. High Environmental Requirements

Due to the characteristics mentioned above and the special properties of some key components, medical testing instruments have very high environmental requirements.

The purpose of instrument maintenance is to reduce or avoid accidental failures, delay inevitable failures, and ensure the stability and reliability of performance. Instrument maintenance is a long-term task that permeates the entire process. Therefore, specific maintenance measures must be developed based on the characteristics, structure, and usage process of each instrument, targeting aspects prone to failure, and assigned to a dedicated person for implementation.

1. General Maintenance

General maintenance includes issues common to almost all instruments, mainly including the following:

(1) Instrument Grounding: Grounding not only affects the performance and reliability of the instrument but is also crucial for the personal safety of the user. Therefore, all instruments connected to the mains power grid must be connected to a reliable ground wire.

(2) Power Voltage: Because mains voltage fluctuations are significant, often exceeding the required range, an AC voltage stabilizer must be used to ensure stable power supply. Instruments with high requirements are best equipped with a dedicated voltage stabilizer. Additionally, ensure good wire connections in the plug and avoid incorrect insertion, which could damage the instrument.

(3) Instrument Operating Environment: The environment significantly impacts the performance, reliability, measurement results, and lifespan of precision testing instruments. The following requirements apply:

① Dust Prevention:Various optical components and switches, contacts, etc., in the instrument should be kept clean regularly. However, since optical components have very high precision, special requirements apply to cleaning methods and cleaning solutions. Carefully read the instrument's maintenance instructions before cleaning to avoid scratching or damaging the optical surfaces.

② Moisture Prevention:Optical components, optoelectronic components, and electronic components in the instrument are susceptible to mildew and damage when exposed to moisture. Regular inspection and timely replacement of desiccant are necessary; when not in use for extended periods, the instrument should be turned on periodically to expel moisture and prevent moisture damage.

③ Heat Prevention:Testing instruments generally require a suitable working and storage environment with minimal temperature fluctuations. Therefore, temperature regulators (air conditioners) are usually installed, with a temperature of 20-25℃ generally being most suitable. Instruments should also be kept away from heat sources and direct sunlight.

④ Vibration Prevention:Vibration not only affects the performance and measurement results of the testing instrument but can also damage some precision components. Therefore, place the instrument on a cement worktable or anti-vibration table away from the vibration source.

⑤ Corrosion Prevention:During use and storage, avoid contact with acidic, alkaline, or other corrosive gases and liquids to prevent component corrosion and damage.

The above are the main aspects of general instrument maintenance. In addition, when all instruments are shut down and not in use, the main power supply must be turned off, and the power plug unplugged to ensure safety.

2. Special Maintenance

This section focuses on the characteristics of testing instruments. Since each testing instrument has its unique characteristics, only a few typical and representative aspects are introduced here.

In addition, instrument maintenance includes many other special aspects. For example, components made of plexiglass should avoid contact with organic solvents; gas chromatographs should avoid flammable gases during use, and their hydrogen source should be kept away from fire sources, etc. These details are usually described in detail in the instrument's instruction manual. Personnel responsible for maintenance should carefully read the relevant content in the instruction manual to perform correct maintenance.

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