The constant temperature and humidity weighing room provides a constant temperature and humidity environment for weighing and monitoring low concentration particulate matter (PM2.5). The equipment adopts special shock absorption and noise reduction measures, and can fully ensure the steady-state requirements of the precision balance even when a precision electronic balance is placed inside the box.
Below, the editor will briefly introduce the reasons why the constant temperature and humidity weighing room does not cool down? as shown below
Reasons for not cooling:
1. As the temperature cannot be maintained, observe whether the refrigeration compressor can start during the operation of the test chamber. If the compressor can start during the operation of the environmental testing equipment, it indicates that the electrical circuit from the main power supply to each compressor is normal and there are no problems with the electrical system.
2. There is no problem with the electrical system, continue to check the refrigeration system. Firstly, check that the discharge and suction pressures of the low-temperature (R23) stage compressors of the two refrigeration units are both lower than normal, and the suction pressure is in an evacuated state, indicating that the refrigerant capacity of the main refrigeration unit is insufficient.
3. Touching the exhaust and suction pipelines of the R23 compressor in the main unit, it was found that the temperature of the exhaust pipeline was not high, and the temperature of the suction pipeline was also not low (without frosting), which also indicates a lack of R23 refrigerant in the main unit.