| 摘要 |
FIELD: electrical engineering. SUBSTANCE: triode operating under mode of thermal emission of electrons from cathode is used in proposed ohmmeter in the capacity of converter of measured parameter to current through pointer device. The latter device is graduated in Ohms and measures current in grid circuit which depends on value of determined resistor connected to anode and cathode of tube. Negative bias from separate rectifier is fed to anode of triode to expand range of measured resistances and to enlarge working section of instrument scale. This ohmmeter makes it possible to measure resistance within range from 10to 10Ohm. EFFECT: expanded range of measured resistances. |
