Maintenance of high and low temperature test chamber

Repair: 1 The temperature and humidity of the high and low temperature laboratory are important factors affecting the performance of the device, which may cause the corrosion of mechanical parts, and the mechanical parts of the high and low temperature may cause errors or end of performance degradation; the grating of the optical elements such as the test under the high and low temperature may cause the corrosion of the constant temperature electron microscope, focus lens, aluminum, etc., which may cause light shortage, stray light, noise, or even stop working, Therefore, the high and low temperature are affected, and the maintenance life should be corrected regularly 2 There will be dust when using at high and low temperature for a period of time The radiator shall be retightened with heating elements, the sealed optical frame window shall be cleaned, if necessary, calibrated, the mechanical parts shall be cleaned and necessary lubrication shall be carried out, after which, the original state shall be restored, and then necessary inspection, adjustment and record shall be carried out 3 High and low temperature working environment, dust and corrosive gas can also affect the flexibility of mechanical system, reducing limit switches and buttons The reliability of optical coupling is one of the reasons for the research caused by the corrosion of aluminum components High temperature, low temperature fast, usually try not to add water, in order to avoid the impact on the machine Maintenance: the high and low temperature series of test equipment we are talking about here include: high and low temperature test chamber, high and low temperature alternating test chamber, constant temperature and humidity test chamber, high and low temperature damp heat test chamber, etc the same refrigeration core of these equipment - compressor The quality of the equipment test system is directly related to the control performance of the compressor As the core part of the temperature testing machine, the maintenance of the refrigeration compressor is particularly important Next, Donglu on the high and low temperature series of test equipment compressor maintenance, summed up the following experience First of all, in the laboratory environment, it is necessary to choose a good installation site, which means that the compressor of the high and low temperature series test equipment is the prerequisite for the correct use of the air system If the test environment of the test equipment is not planned in advance, the reasons for the difficulty of compressor maintenance and the poor quality of compressed air will be formed in the future 1 Since the compressor has an air circulation system, if there is much dust in the air around the equipment, a filter device shall be added Meanwhile, combustible gas and corrosive gas are not allowed in the air to avoid explosion or internal corrosion Generally speaking, it is necessary to ensure that the relative humidity of the air is low, the dust is small and the ventilation is good 2 The compression performance should not be subject to high temperature, and the ambient temperature should be lower than 30 ℃ If the temperature is too high, the output air volume of the compressor will be reduced 3 The equipment shall be placed in a spacious place, and the narrow space is not conducive to the later maintenance, especially the radiator (condenser) of the compressor's freezer shall be maintained regularly and kept clean 4 The voltage at the working site of the test box shall be kept stable, which will lead to excessive or too small current, and the compressor will be damaged if it works under this condition 5 The test chamber shall be built on a hard floor, and the foundation plane shall be leveled before installation to avoid noise caused by vibration of the compressor In the test process of high and low temperature test equipment, correct operation and reasonable troubleshooting are conducive to the maintenance of the compressor and prolong its service life 1 The compressor should not be started frequently during the test, and the interval time of compressor starting is 15 minutes 2 During the test run of the equipment, the running direction of the compressor shall be strictly checked In case of reverse rotation, the equipment shall be shut down immediately, the power supply shall be cut off, and any two three-phase lines shall be switched on again, otherwise the compressor will be damaged 3 During the operation of the test equipment, the compressor safety valve and other protection systems shall be inspected regularly to ensure its sensitivity and reliability.