Vapour vacuum pumps — Measurement of performance characteristics — Part 2: Measurement of critical backing pressure
NORMA vydaná dňa 30.11.1989
Označenie normy: ISO 1608-2:1989-ed.2.0
Dátum vydania normy: 30.11.1989
Počet strán: 3
Približná hmotnosť: 9 g (0.02 libier)
Krajina: Medzinárodná technická norma
Kategória: Technické normy ISO
Description / Abstract: 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.