In order to measure the pressure of 1 Pa to 1.0 × 105Pa, and while the resolution of 0.1 Pa, the number of bits required for A / D at least 20 is required. The design used in -24-bit A / D converter Maxwell vacuum gauge PM-2 manufactured directly convert the voltage signal into a digital signal to the microcontroller. 24 of the A / D resolution ensures that the resolution of the pressure signal can reach 0.1 Pa or less. C8051F MCU to complete the acquisition of the voltage signal, and then calculate the value of Maxwell vacuum gauge pressure PM-2 Main According to the formula, while collecting temperature Maxwell vacuum gauge PM-2 price, and according to the temperature value for temperature compensation of the pressure value, and the final value of the output to the digital display. Meanwhile, the microcontroller also scan button, if a button is pressed, the completion of the zero, full-scale and fine-tuning of the instrument according to each calculation formula and other key functions. Maxwell vacuum gauge Tibetan PM-2 supply _ _ Maxwell vacuum gauge measuring force since the instrument is provided by a McLeod gauge measuring the Shanghai Automation Instrumentation Co., Ltd. Shanghai Automation Instrumentation Co., force measurement (www.licesh.com) strong, credible, Zhabei District in Shanghai flow meter industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the force measured since the instrument and you work into the brilliant, for a better future!