... is integrated with digital display of DC voltage, current signal source and digital multimeter functions. The instrument uses large liquid crystal ... with backlight reading hold and auto power-off. The instrument can be fed by DC or AC power source, which delivers more convenience.Signal ... working power supply for two-wire instrument.• 0-10V, 0-100mV, 0-20mV, 0-20mA and 0-22mA DC signal source, which ...