Main functions
High precision A/D conversion with readability 1/30000;AC/DC power supply,with inside rechargeable 6V/4AH battery;Able to setup zero-tracking range;Able to setup Hi-Lo alarm function;Able to setup hold function;Muti-range calibration;Able to setup print function;can add built-in clock;Standard RS232 communication interface with select-able baud rate and communication method