Operation manual of ZBL-R800, ZBL-R630, ZBL-C310AHotline: (86)010-51290405 Fax: (86)010-5129040648and it will go back to main menu interface automatically.In the data deletion interface as shown in figure 3-35, pressing【BACK】to go back to main menu directly.Attention: This function will delete all the data, pleasemake sure to transmit data to computer before deletion.3.4.6 On-site test3.4.6.1 Parameters setting1. To select the method of test in main menu and press【ENTER】to enter into parameter setting interface2. To set default diameter3. To set minimum value of thickness to 0.4. To set object No.(optional)5. To hold sensor in the air without moving and keep away fromferromagnet6. To press 【BACK】to enter into test interface7. After nearly 3 seconds, the current thickness value will be 0,then resetting is completed, entering into test state.Attention: before displaying 0 for current thickness value,keep sensor away from rebar and other ferromagnet.Attention: During the measurement, resetting operationshould be done about every 10 minutes.3.4.6.2 To locate rebarGenerally, upper bars (or stirrups) should be located at first, and thenlocates the lower bars (or stirrups) through measuring the centralposition of the two upper bars, see fig.3-36.Moving sensor in a uniform speed along one direction on the surfaceof concrete, observing scroll bar, current thickness value, thickness ofcover and buzzer sounds. By any of the following method, you can