1. There is no problem with the electrical system. Continue to check the refrigeration system. First, check whether the discharge and suction pressures of the low-temperature (R23) compressors of the two sets of refrigeration units are lower than the normal values, and whether the suction pressure is in the...
1. Insufficient refrigerant in the refrigeration system of the constant temperature and humidity test chamber. 2. There is too much cooling water in the water cooling system and too little amount of refrigerant. Therefore, the flow of cooling water and refrigerant must be...
What is the "cold" main knowledge of the constant temperature and humidity test chamber, in fact, constant temperature and humidity is the refrigeration system studied, we know its characteristics, structure and content, we can better use it. Below I will take you to understand it. Refrigeration...
What is the "cold" main knowledge of the constant temperature and humidity test chamber, in fact, constant temperature and humidity is the refrigeration system studied, we know its characteristics, structure and content, we can better use it. Below I will take you to understand it. Refrigeration...
1. The sample to be tested should be uniform. For example, the length of the width and thickness of the board is 50 mm longer than the fixed length. The nominal width of the sample should not exceed 5 mm and not exceed 25.4 mm. The ratio of width to thickness is less than 8. The narrow sample increases the strain...
1. After the test, if the tensile testing machine is not used for a long time, the computer should be turned off and the measurement and control card should be removed. 2. Regularly check whether the connection line of the measuring and control card and the tensile testing machine is in good contact....
1. Temperature system 1. Sample overheating protection. When the temperature of the sample area exceeds the protection temperature set by the controller, it will stop working and alarm at the same time. Over-temperature protection is divided into upper and lower levels of protection, and can be set according...
1. For the high and low temperature alternating damp heat test chamber that has been used for many years, when the silicone rubber is aging, new sealing strips should be replaced in time. 2. When the seal of the door of the test chamber is slightly deformed and the surface is not parallel,...
The sealing system of high and low temperature test chamber generally adopts silicon rubber sealing strip for double heat insulation and airtight tightness. Its function is mainly to seal the door of the test box, prevent outside air from intruding into the test box, prevent the gas in the...
1. Observe whether the refrigeration compressor of the high and low temperature test chamber can be started during the operation of the test chamber, and whether the compressor can be started during the operation of the environmental test equipment, indicating that the circuit from the main power supply to each...
1. constant temperature and humidity test box Calibration under load conditions: The advantage of this method is that it can accurately assess the impact of the sample on the performance of the constant temperature and humidity test chamber, and it is easy to obtain detailed information about the key...
Tensile testing machine is used to test the mechanical properties of various materials such as tearing and stretching. Different materials correspond to different fixtures during the test. The strength and speed of the tensile testing machine are two indicators that need to be paid special attention to...
