标准摘要
[中文适用范围]： 所考虑的测量方法涉及蒸汽喷射真空泵、扩散泵和扩散喷射泵。 这些泵的性能对前级压力的依赖性只能通过在工作范围内将入口压力和前级压力关联起来的曲线来完整地描述。 说明了推荐的测试圆顶和测试设备的原理。 [外文原描述]： The considered method of measurement deals with vapours jet vacuum pumps, diffusions pumps and diffusion-ejector pumps. The dependence of the performance of these pumps on the backing pressure can only be completely described be means of a curve relating the inlet and backing pressure over the range of operation. The recommended test dome and the principle of the test equipment are illustrated.
英文名称Vapour vacuum pumps — Measurement of performance characteristics — Part 2: Measurement of critical backing pressure