Repair :
1. The temperature and humidity of the high and low temperature test chambers are important factors affecting the performance of the device, which may cause corrosion of mechanical parts, high and low temperature mechanical parts lead to errors or end of performance degradation; optical components such as tests for high and low temperature conditions, Constant temperature electron microscopy, focusing lens, aluminum and other corrosion, resulting in insufficient light, stray light, noise, and even stop working, thus affecting high and low temperatures, maintenance life should be corrected regularly.
2. Use high temperature and low temperature for a period of time. The radiator should be re-fastened to the heating element, the sealed optical frame window is cleaned, if necessary, calibrated, cleaned mechanical parts and necessary lubrication, and finally, restored to its original shape, then subjected to necessary inspection, adjustment and recording.
3 , high and low temperature working environment, dust and corrosive gases can also affect the flexibility of mechanical systems, reduce limit switches, buttons are all kinds, the reliability of optical coupling is one of the reasons for the study caused by corrosion of aluminum parts.
High temperature, low temperature, usually try not to add water to avoid the impact on the machine.
Maintenance :
The high and low temperature series test equipment we talked about here includes: high and low temperature test chambers, high and low temperature alternating test chambers, constant temperature and humidity test chambers, high and low temperature humid heat test chambers, etc., the same refrigeration core of these equipments - the compressor. The quality of the equipment test system is directly related to the control performance of the compressor. The refrigeration compressor is the core component of the temperature tester, and the maintenance of the compressor is particularly important. Below, Dongpu summarizes the following experiences on the compressor maintenance of high and low temperature series test equipment.
The first is in the laboratory environment, the need to choose a good installation site, which is the prerequisite for the correct use of the air system for the compressor of the high and low temperature series test equipment. If the test environment of the test equipment is not planned in advance, the cause of difficulty in repairing the compressor and the quality of the compressed air may be formed in the future.
1. Since the compressor has an air circulation system, if there is much dust in the environment around the equipment, a filtering device is needed. At the same time, it is absolutely not allowed to contain flammable gas and corrosive gas in the air, so as to avoid explosion or internal corrosion. On the whole, 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 performance of compression should not be affected by high temperature, and the ambient temperature is lower than 30 °C. If the temperature is too high, the output air volume of the compressor will decrease.
3. The equipment should be placed in a spacious place. The narrow space is not conducive to the later maintenance and maintenance. In particular, the radiator ( condenser ) of the compressor's freezer should be regularly maintained and kept clean.
4. The voltage at the working site of the test box should be stable, otherwise the current will be too large or too small. Working under these conditions will cause damage to the compressor.
5. The test box should be built on a hard floor. The foundation plane should be leveled before installation to avoid noise caused by vibration of the compressor.
High and low temperature test equipment during the test, correct operation and reasonable handling of faults, is conducive to the maintenance of the compressor and extend the service life.
1. It is not advisable to start the compressor frequently during the test. The interval between compressor start-up is 15 minutes.
2. When the equipment is in trial operation, strictly check the running direction of the compressor. When it is found that the reversal should be stopped immediately, cut off the power supply, and then re-start any two of the three-phase lines, otherwise the compressor will be damaged.
3. During the operation of the test equipment, the protection system of the compressor safety valve is regularly checked to ensure its sensitivity and reliability.
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