The maintenance of a thermal mechanical analyzer (TMA) requires a comprehensive consideration of the instrument's characteristics and usage scenarios. The following are key measures:

1、 Key points of daily maintenance

1. ‌environmental control‌

• Maintain stable laboratory temperature (recommended 20-25 ℃) and avoid strong electromagnetic interference and vibration.

• Use a dedicated regulated power supply to ensure that the voltage fluctuation range is within ± 5%
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2. ‌Cleaning and dust prevention‌

• Optical components (such as displacement sensors) need to be cleaned with mirror paper, and direct contact with the mirror surface is strictly prohibited.

• Regularly wipe mechanical components such as sample holders and furnaces with anhydrous ethanol to prevent residue from affecting accuracy.

3. ‌Maintenance of constant temperature water bath system‌

• Use distilled or deionized water, regularly replace the filter element (recommended every 2-3 months), and clean the pipeline.

• It is recommended to raise the water temperature by 2-3 ℃ (with refrigeration) or 10 ℃ (without refrigeration) above room temperature to avoid condensation.

2、 Periodic maintenance plan

1. ‌Calibration and Accuracy Verification‌

• Calibrate temperature, displacement, and force systems every 6-12 months, in accordance with ISO/ASTM standards.

• When restarting after long-term disuse, a baseline drift test should be conducted first.

2. ‌Replacement of vulnerable parts‌

• Check the sealing ring of the probe, insulation material of the heating furnace, etc. If aging is found, replace it immediately.

• When lubricating transmission components (such as lifting mechanisms), use high-temperature lubricating grease.

3. ‌Software and Data Management‌

• Update control software to the latest version and backup historical test data.

3、 Operating standards and precautions

• After testing corrosive samples, it is necessary to clean the sample chamber with a C-bottom to avoid residual contamination of the sensor.

  
  

• Cover with dust cover during non working hours, with built-in desiccant (such as silicone) to prevent moisture

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