State system for ensuring the uniformity of measurements. State verification schedule for variable pressure measuring instruments in the range from 1·10 2 to 2,5·10 7 Pa for frequencies from 5·10 -1 to 1·10 4 Hz and durations from 1·10 -5 to 10 s under constant pressure up 5·10 6 Pa
State system for ensuring the uniformity of measurements. State service of standard reference data on physical constants and properties of substances and materials. Standard reference data for atomic energy service. Basic principles
Vacuum equipment. Vapour vacuum pumps. Measurement of performance characteristics. Part 2. Measurement of ultimate pressure and critical backing pressure
