... inspection for qualified products in production line DR series Digital Resistance Meter with auto judgement(0.01-100 Ohm) The principle: When ... for control of auto inspection, simple to operate, and practical.2, Signal input can select data or peak value holding fuction ... by software.5, RS232 OR RS485 Modbus RTU protocol,connectable with various equipment,computer or PLC directly.6, Dimemsions: DR4:48 ...