METHOD OF TEST OF PRESSURE OF INERT GASES IN LOW PRESSURE GASEOUS-DISCHARGE LAMPS Russian patent published in 1995 - IPC

FIELD: electrical engineering. SUBSTANCE: method of test of pressure includes firing of lamp discharge, setting of discharge current and evaluation of pressure value by calibration curve. Lamp is placed in one of arms of measurement bridge. Constant filament current within limits of 0.8-0.85 of working current of lamp is fed to cathode this mode is maintained for 3-5 s, discharge current of lamp within limits of 0.1-10.0 mA is switched on and current in diagonal of bridge is measured after time lag of 6-10 s. EFFECT: enhanced efficiency and reliability of test. 1 dwg