... in production line DR series Digital Resistance Meter with auto judgement(0.01-100 Ohm) The ... indicated, with NG OK or HI LO GO output control,OK means auto reset,NG means handly reset, ... electrical ruler.3, Output:4 lines output,with various output mode selectable:UPPER/LOW or intevals ... 5, RS232 OR RS485 Modbus RTU protocol,connectable with various equipment,computer or PLC directly.6, Dimemsions ...