CELL TESTER Russian patent published in 2002 - IPC

FIELD: electrical engineering, diagnostics of technical condition of storage battery. SUBSTANCE: cell tester is supplemented with two keys, delay circuit, inverter and coincidence circuit. Inputs of both keys are connected to plus lead of tester and their outputs are connected to plus terminal of voltmeter which minus terminal is connected to minus lead of tester. Controlling inputs of keys are connected to output of inverter and to output of delay circuit, outputs of inverter and delay circuit are connected to output of coincidence circuit. One input of the latter is connected to plus terminal of tester and its another input is connected to middle point of connection of load resistor and break switch placed in series between leads of cell tester. EFFECT: increased measurement accuracy, improved operational conditions of cell. 1 dwg