超微压力测量装置是基于称重法来测量超微压力的,其计算精确度为万分之四。该装置具有可移动、测试方便、灵敏度高等优点。文中对其作用原理及其误差均作了介绍和分析。 Micro-pressure measurement device is based on the weight method to measure the super-micro-pressure, the calculation accuracy of four ten thousandths. The device has a mobile, easy to test, high sensitivity and so on. In this paper, its principle of action and its errors are introduced and analyzed.