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