If you are trying to hook this to you Pc Serial port you will need a RS-232 level converter. They convert the PC RS232 (+/- 12v) to TTL (0-5V). The Arduino Serial uses TTL (0-5v).If the unit puts out 0-3 V it might be advisable to level convert 3v to 5v.Spark fun and Adafruit have level converters for these.Another issue is baud rate. Your test appear to be 4800 to 144000 baud. You need to have device and micro running at same baud rate.