... in production line DR series Digital Resistance Meter with auto judgement(0.01-100 Ohm) The principle ... 0-500M can be built when indicated, with NG OK or HI LO GO output control ... as electrical ruler.3, Output:4 lines output,with various output mode selectable:UPPER/LOW or intevals ... 4-20mA,with output range adjusted by software.5, RS232 OR RS485 Modbus RTU protocol,connectable with various equipment, ...