New type constant temperature and humidity test chamber worth knowing about maintenance skills Regardless of the domestic or imported equipment, no matter how good the quality, the service life is closely related to our correct operation and daily maintenance. This is especially true of the constant temperature and humidity test chamber, which is used to judge the performance of the tested sample, and its stability directly determines the accuracy of the test results. Therefore, we need to pay special attention to both during operation and during shutdown. In this chapter, Shanghai Jianhu Instruments and Equipment will summarize the tips for the constant temperature and humidity test chamber during operation and daily maintenance. 1. Constant temperature and humidity test chambers are generally relatively high, we recommend placing them in a relatively benign temperature environment, our experience temperature value is 8 ℃ ~ 23 ℃, laboratories that do not have this condition must be equipped with appropriate air conditioning Or cooling tower. 2. Adhere to the professional management of special personnel, and qualified units should send special personnel to the supplier factory for training and learning from time to time to obtain more professional maintenance and repair experience and capabilities 3. The condenser is cleaned once every 3 months: for the compressor using air cooling, the condenser fan should be regularly repaired and the condenser should be decontaminated and dedusted to ensure its good ventilation and heat exchange performance; for the compressor, water cooling In addition to ensuring the inlet water pressure and inlet water temperature, the corresponding flow rate must also be ensured, and the interior of the condenser should be cleaned and descaled regularly to obtain its continuous heat exchange performance. 4. Regular cleaning of the evaporator: Due to the different cleanliness levels of the test products, a lot of small particles such as dust will condense on the evaporator under the action of forced wind circulation, and it should be cleaned regularly. 5.Cleaning and balance of circulating fan blades and condenser fans: similar to the cleaning of evaporators.Due to the different working environment of the test chamber, many small particles such as dust will condensate on the circulating fan blades and condenser fans, and should be cleaned regularly. 6. Waterway and humidifier cleaning: If the waterway is not smooth and the humidifier is fouled, it will easily cause the humidifier to dry and burn, which may damage the humidifier, so the waterway and humidifier must be cleaned regularly. 7. Insist on setting the temperature near the ambient temperature after each test, cut off the power after working for about 30 minutes, and wipe the wall of the working room clean. 8. If the equipment needs to be relocated, it is best to be carried out under the guidance of Hongzhan's technical staff to avoid unnecessary damage or damage to the equipment. 9. When the machine is not used for a long time, it should be regularly powered on every half a month, and the power-on time should not be less than 1 hour. 10. The temperature range of constant temperature and humidity test chamber is wide, the low temperature can be as low as -70 ℃; the high temperature can be as high as 150 ℃. We prohibit opening the door during the experiment. The temperature in the high-temperature laboratory is very high, and opening the door will cause harm to personnel; when the temperature is low, the temperature in the laboratory is very low. In addition to the damage to the personnel, opening the door will also cause the machine evaporator to freeze and shorten the test chamber Service life. 11. Maintenance principles: Since the constant temperature and humidity test chamber is basically composed of multiple systems of electrical, refrigeration and mechanical, once there is a problem with the equipment, the entire equipment system should be fully inspected and comprehensively analyzed. Generally speaking, the process of analysis and judgment can be "outside" after "Li" means that after eliminating external factors, the system is first decomposed according to the fault phenomenon. Then the comprehensive analysis and judgment of the system are performed. Or the backward reasoning method can be used to find the cause of the fault: first, according to the electrical wiring diagram, find out whether the electrical system If there is a problem, finally find out whether there is a problem with the refrigeration system. Before you understand the cause of the failure, you must not disassemble or replace the parts to avoid unnecessary trouble. Gloabl Sports Equipments Co.,Ltd , https://www.sandingarchery.com