DEVICE FOR AUTOMATIC MEASUREMENT OF PRESSURE IN TUBES Russian patent published in 1994 - IPC

FIELD: vacuum measurements. SUBSTANCE: device includes source of accelerating voltage, source of filament voltage, two switches, controlled unit of automatic compensation of background current, controlled inverter of ion current, source of voltage of cathode bias, controlled integrator of electron current, electron current comparator, ion charge comparator, logic matrix, timer, control unit, time interval meter, current source, three terminals to connect electrodes of tube with proper couplings. EFFECT: enhanced reliability and speed of measurements. 3 dwg