Introduction: In a low-pressure gas, the number of positive ions generated by the ionization of gas molecules is proportional to the gas pressure. The ionization vacuum gauge is a vacuum measuring instrument based on the principle that the pressure of the gas to be measured is proportional to the ion current generated by gas ionization under certain conditions. According to the method of ion generation, the vacuum gauge that uses the hot cathode to emit electrons to ionize the gas is called the hot cathode ionization vacuum gauge; among them, the hot cathode ionization vacuum gauge is composed of a hot cathode gauge tube and a measuring instrument. The measuring instrument is composed of regulating power supply, emission current regulator, ion current measuring amplifier and other parts. The hot cathode ionization gauge is connected to the vacuum system under test. The hot cathode ionization gauge is a triode with a cathode, a grid, and a collector. The collector potential is negative relative to the cathode; the grid is positive relative to the cathode. When the ionization gauge is energized and heated, the cathode emits electrons. When the electrons reach the grid, they collide with gas molecules to produce positive ions and electrons. When the emission current is constant, the number of positive ions is proportional to the pressure of the gas being measured. After the positive ions are collected by the collector and amplified by the measuring circuit, the vacuum degree to be measured can be read by the instruction meter. Technical parameter: Equipped with regulation: ZJ-27 Measuring range: 10-1--10-5 Pa Number of measurement channels: 1 channel Number of control channels: 2 channels Control method: point control or area control Control range: 10-1-10-5 Pa Control accuracy: 1% Response time: 1S Display mode: LED digital tube 5-digit digital tube, single display Relay control capability: AC220V/3A (non-inductive load) Power supply: AC220V±10% 50Hz Power consumption: 30W Weight: 5Kg Chassis size: 320X280X88 Optional function 1. The cable can be lengthened. 2.It can be equipped with analog output such as 0-5V/10V, 0/4-10/20 mA. 3.It can be equipped with RS232 or 485 interface. 4. The regulation can be equipped with different interface methods.
Introduction: In a low-pressure gas, the number of positive ions generated by the ionization of gas molecules is proportional to the gas pressure. The ionization vacuum gauge is a vacuum measuring instrument based on the principle that the pressure of the gas to be measured is proportional to the ion current generated by gas ionization under certain conditions. According to the method of ion generation, the vacuum gauge that uses the hot cathode to emit electrons to ionize the gas is called the hot cathode ionization vacuum gauge; among them, the hot cathode ionization vacuum gauge is composed of a hot cathode gauge tube and a measuring instrument. The measuring instrument is composed of regulating power supply, emission current regulator, ion current measuring amplifier and other parts. The hot cathode ionization gauge is connected to the vacuum system under test. The hot cathode ionization gauge is a triode with a cathode, a grid, and a collector. The collector potential is negative relative to the cathode; the grid is positive relative to the cathode. When the ionization gauge is energized and heated, the cathode emits electrons. When the electrons reach the grid, they collide with gas molecules to produce positive ions and electrons. When the emission current is constant, the number of positive ions is proportional to the pressure of the gas being measured. After the positive ions are collected by the collector and amplified by the measuring circuit, the vacuum degree to be measured can be read by the instruction meter.
