The media gateway is controlled by a media gateway controller, which provides call control and signaling functions. Regarding the environmental test method of media gateway equipment, there is a relevant introduction in the standard YD/T 1387.4-2008. The following is the content compiled by Xiaobian for your...
Electric vehicle DC/DC converter, as a very important part of electric vehicle power system, its relevant ambient temperature test method refers to GB/T 24347-2009, which needs to be completed by constant temperature and humidity test chamber. The specific test steps are as follows. Test steps for...
1. Ball screw: The screw currently used in the tensile testing machine includes a ball screw and a trapezoidal screw. Generally, the lead screw has large clearance, large friction and short life. There are some manufacturers on the market now, in order to save cost and obtain greater benefits, use lead screws...
1. Is the high and low temperature test chamber running normally? When the temperature is too high, the setting parameters of the PID need to be sorted out. If the temperature of the high and low temperature test chamber rises directly, the over-temperature protection occurs, and the controller fails, the...
1. The difference between static and dynamic tensile testing machines 1. Structural level. The dynamic structure of the tensile testing machine is slightly more complicated than the static tensile testing machine. 2. Action level. In general, static racks cannot run at...
1. Observe whether the shock absorber spring is deformed, if the deformation will affect the pressure regulation stability, resulting in noise. 2. Look at the wear degree of the needle valve, whether the cone surface and the valve seat can be closely combined, if not, it will cause unstable...
1. The tensile machine should be placed in a clean, dry, vibration-free room with a room temperature of 20°C ± 10°C. Pay attention to beam bending tests, extensometer tests, and equipment maintenance, leaving enough space around the testing machine. In the specific steps of setting, the main body and dynamometer...
1. The shallow water area is humidified. The chamber has a shallow water area and an electric heating tube. According to the heating water, the evaporated water is humidified. The characteristic is that the humidification speed is slow, but the environmental humidity does not change much after...
1. The dust in the condenser of the constant temperature and humidity test chamber needs to be removed, and the condenser should be maintained regularly and once a month. 2. The wet ball tape of the constant temperature and humidity test chamber should be tested and replaced once a...
First, cooling capacity. An important part of the constant temperature and humidity test chamber is also an important parameter for judging the performance of the test chamber. It includes four major components: compressor, condenser, throttling device and evaporator. The compressor is the heart of the...
1. The relative humidity reading of the test chamber is based on the difference in temperature and humidity, and strictly speaking, it is also related to the local atmospheric pressure and wind speed at that time. This is directly and closely related to the quality of the gauze. 2....
In the process of production and functional improvement of automobile interior accessories, it is likely that small molecular substances will be introduced into it, and these introduced substances are volatile, which is that when the temperature inside the car is high, these substances are more volatile. Molecular...
