... and mA, mV measurement functions of this instrument are mainly for field calibration, service in industrial automation site. Besides, this ... has general functions of multimeter, which is an ideal tool for field metermen, distributed control system maintainers and instrument installers. It ... , which can be used as 24V.DC working power supply for two-wire instrument.• 0-10V, 0-100mV, 0-20mV, 0-20mA ...