Operation manual of ZBL-R800, ZBL-R630, ZBL-C310AHotline: (86)010-51290405 Fax: (86)010-5129040611U-disk through Data Output and then analyze the data in U-disk withcomputer software.2.1.1.5 Sensor portIt is used for connecting with sensor signal wire.2.1.1.6 NameplateOn the back of instrument and sensor, nameplate consists of companyname, manufacture date, instrument serial number etc.2.1.2 Sensor and electrode2.1.2.1 Rebar sensorWith an integrative design, rebar sensor as shown in fig.2-2 can scanrebar and record displacement of sensor in real time accurately. Whilegoing forward, sensor scans rebar and backward, scrubs it.Figure2.2 Rebar sensorSensor is directive. When sensor axis parallels with the direction ofrebar, it is most sensitive, conversely, when sensor axis isperpendicular to the direction of rebar, the signal is weakest. Therefore,while measuring, sensor axis should be parallel with the direction ofrebar and scans in the vertical direction.