There are several ways to correctly maintain the low-temperature thermostatic bath.

Low-temperature thermostatic bath is a common temperature control equipment in the laboratory, which is mainly used for constant temperature or low temperature treatment of experimental samples. In order to ensure the normal use of equipment and prolong its service life, regular maintenance is essential. The following is a detailed description of the maintenance mode of low-temperature thermostatic bath:

1. Safety inspection and operation preparation

-Equipment inspection: Before each use, it is necessary to conduct a comprehensive equipment inspection, including confirming that there is no fire source, inflammable and explosive materials around the equipment, checking whether the power plug is in good contact, and whether there are impurities or damage on the instrument surface. At the same time, check whether the thermometers inside and outside the equipment are working normally, whether the components such as water pump, cooling tower and refrigerator are working normally, and whether there is rust or failure.

-Operation preparation: read the instruction manual and safety regulations carefully to ensure the correct operation specifications. Do not touch or change the internal components of the instrument at will to avoid electric shock and other dangers.

2. Daily use and precautions

-Selection and replacement of liquid medium: select suitable low-temperature coolant according to the experimental requirements, such as ethylene glycol and methanol, and ensure its purity meets the standards. Different experiments have different requirements for the medium in the tank, so it is necessary to check the state of the cooling liquid regularly. If turbidity, discoloration or sediment are found, it should be replaced in time.

-Avoid severe vibration and impact: During operation, care should be taken to avoid severe vibration or impact on the tank body, so as not to damage the internal mechanical structure and electronic components. When moving or transporting the low-temperature thermostatic bath, be sure to handle it with care and take necessary earthquake-proof measures.

3. Maintenance and cleaning

-Clean the condenser regularly: If the low-temperature thermostat has been used for more than six months, or the high-voltage and low-voltage switches often fail, or the refrigeration capacity is reduced, arrange staff to clean the condenser. Dust and dirt on the condenser will affect its heat dissipation effect, resulting in a decline in refrigeration efficiency.

-Cleaning the radiator coil: both the electric power circulating itself and the heat taken by the refrigerant from the load need to be discharged from the radiator at the front ventilation hood, and the surface of the radiator coil in the low-temperature thermostatic bath needs to be kept clean to ensure the circulation of surrounding air and low temperature. Regularly clean the scale on the coil to ensure good heat exchange effect.

-Cleaning the inner tank: when it is not used for a long time, keep the tank dry and clean the inner tank regularly. When cleaning, you can gently wipe the inside and outside of the tank with a soft cloth to remove residues and dirt. Be careful not to use sharp or hard tools to avoid scratching the surface of the tank body.

4. Troubleshooting and emergency treatment

-Fault alarm shutdown: When the unit is stopped by fault alarm, press the stop button of the unit first (the alarm light will go out), and then check the cause of the fault. It is forbidden to forcibly start the machine before the fault is eliminated.

-Emergency treatment: the unit shall not be shut down by cutting off the main power supply unless it is an emergency; If the unit is not used for a long time in winter, the unit should be turned off first, then the main power supply should be turned off, and the water in the system should be drained.