There are a small amount of impurities in the liquid medium of the high-precision cryogenic constant temperature bath. Even if the medium is made from distilled water, there is no guarantee that it will be free from impurities when added to the tank. The water circulation of the cryostat usually sets the temperature at 20°C. This temperature promotes the growth of microorganisms in the tank. In the long run, a large number of microorganisms will be produced in the Water Tank, causing the filter to clog, the liquid medium cannot circulate well, and the constant temperature Water Tank is running. There will be noise. In addition, there are cases where microorganisms are attached to the surface of the heat exchanger, resulting in a poor heat transfer effect and a small cooling capacity of the heat exchanger.
Therefore, the way to solve the noise problem is to not use the high-precision low-temperature constant temperature bath for a long time to keep the water circulation of the warm Water Bath clean, clean the filter and heat exchanger regularly, and keep the Water Tank dry to reduce the growth of microorganisms. time.
First of all, the high-precision low temperature constant temperature bath unit should be turned on to see if the fan is turning correctly. If the forward rotation can be turned on, the reverse rotation means that the power wiring is reversed, and the phase sequence needs to be replaced before starting. The setting values of the various protection devices of this machine have been set by the factory, and the user should not change them arbitrarily.
Secondly, when the high-precision low-temperature constant temperature tank group fails to alarm and stop, please press the stop button of the equipment first, and then check the cause of the failure, and do not force the machine to run before troubleshooting. Unless it is an emergency, the unit should not be shut down by cutting main power to the cryostat. If the unit is out of operation for an extended period of time during winter, switch off the unit, then switch off the mains power and drain the cold bath.
Keep the machine room clean and well ventilated, and regularly clean and disassemble the condenser to ensure the normal and stable operation of the unit. The low temperature constant temperature tank should keep the cooling tower clean, keep the air circulation around the cooling tower, and keep the temperature low to prevent debris from entering the cooling tower, thereby reducing the heat dissipation efficiency. This is also very necessary.
