How To Maintain Experimental Instruments Part1
- Jul 26, 2018 -

The precision instruments and equipment we use need to be maintained, and the precision instrument protection work will be beneficial to the normal operation of the experiment, avoiding the occurrence of experimental accidents and prolonging the service life of the equipment. Different precision instruments have different maintenance requirements and need to be maintained according to the instructions. The following is a general knowledge of the maintenance of precision instruments and equipment.

1. Environmental requirements for precision instruments

Precision equipment usually has certain requirements for the environment. If these conditions are not met, not only the use of the equipment is not good, but also the detection performance of the equipment may be changed, affecting the correctness and reliability of the final test data, and even Cause damage to the equipment and shorten its service life.

Precision instruments and equipment have requirements for the humidity and temperature of the environment. In addition, it must be protected against dust, vibration, electromagnetic interference, direct direct sunlight, and direct airflow.

The humidity of the air is easily overlooked. Due to the lack of understanding of this aspect and the lack of necessary protective measures, the damage caused by moisture, mold and metal oxidation is quietly occurring and causes losses. According to relevant statistics, the annual loss due to moist mold and oxidative corrosion is about 3-4% of the world's total output value. In high-humidity environments, non-metallic products are prone to mildew and deliquescence, and metal products are corroded and corroded.

2. Maintenance of experimental equipment in the rainy season

At the dawn of this rainy season, pay special attention to the impact of humid environments on precision instruments and equipment. According to statistics: the equipment is placed in the bottom and high humidity laboratory, the failure rate is about 30~50% higher than the laboratory environment. In the humid and dusty environment, the metal structural parts of the instrument are easily rusted, and the friction of the moving parts is increased, which can cause permanent wear of the mechanical parts, atomization and mildew of the optical lens, and easy connection of the instrument equipment. The metal is partially oxidized, causing poor contact failure. What is more serious is that the humid environment deteriorates the insulation performance of the instrument and causes unsafe factors.

Therefore, precision instruments should be placed in an environment with good ventilation, low humidity and low dust. It is equipped with air conditioning and ventilation, and can be equipped with a dehumidifier and air purification system. On the surface, although the spending is increased, the actual return will greatly exceed your expenses.

3. Daily maintenance and maintenance methods for precision instruments and equipment:

(1) The ambient humidity is generally controlled within the range of 45 to 60%. This is because when the relative humidity of the environment is greater than 60%, the mold can start to grow. When the relative humidity is greater than 65%, the growth is accelerated, and the humidity reaches 80 to 95%, which is the optimum growth humidity of the mold, and is also the high incidence environment of the enzyme. Air conditioners can be used to control the humidity of the laboratory, and the laboratory temperature should be kept between 20 and 25 °C. If necessary, dehumidifiers should be specially equipped for 24-hour dehumidification.

(2) For equipment and equipment that are not used for a period of time, cover it with a cloth cover to prevent moisture and dust from entering.

(3) The desiccant placed in the instrument should be inspected regularly, and should be replaced in time if it fails.

(4) For devices that need to be stored in a dry environment, they should be stored in a drying dish when not in use to prevent moisture.

(5) Regularly apply oil to metal parts coated with oil layer protection.