EN
上一条： 
沪公网安备31011802003762
-
-
Tel:13585763546 -
扫码咨询
-
-
TOP
韦弗斯新闻动态
最新动态
SF6安全保障专家
专注于SF6气体检测的专业化
The medium density and pressure unit of the product are Mpa, and what is the difference between density detection and pressure detection? How does it work?
发布时间：2015-11-09
来源：ydlcb 浏览次数：40次
Density is a measure of the specific gravity of SF6 gas in a closed container, which is independent of pressure and temperature changes. That is, the gas in the container does not leak or add gas into it, and its density state is constant. The internal pressure will change with the change of the ambient temperature.
The pressure can be measured with a manometer. When measuring the density value, if it is a mechanical measurement, it is necessary to install a temperature compensation device on the pressure gauge. That is, when the density is certain, the displacement of the manometer pointer caused by the temperature change will be compensated by the temperature compensation device, so that the pointer will not move with the temperature change only when the temperature changes. However, when the actual inflation or leakage, because the temperature compensation device cannot be compensated, the pointer will move normally to correctly indicate the current density state (that is, the pressure state at 20 degrees) with the replenishment and leakage.
If it is digital density detection, the pressure sensor with output electrical signal is used. The pressure sensor output is the pressure detection value that changes with temperature, and the environmental temperature value is detected at the same time when the pressure is detected, and the current temperature and pressure detection value is converted into the pressure value at 20℃ through the software design, the standard density value is obtained. Therefore, the pressure and density values are converted by software in digital detection.