Kohagoki Stud Finder Wall Scanner - 5 in 1 Electronic Stud Sensor Beam Joist Finder Wall Detector Edge Center Finding with LCD Display for Wood AC Wire Metal Studs Cable Joist Detection

Step 1: Calibrate the tool before every scan After choose the mode press and hold the scan button( on the side of the tool) to calibrate this tool. Wait for the reducing bars disappeared and beep to confirm calibration has completed. In stud/deep mode put it on the wall where you want to detect to calibrate it ;In AC/Metal mode put it in the air to calibrate it. Step 2: Scan the wall Hold down the button then move the stud finder along the wall slowly if shake or lift the scanner accidently the device needs to be re-calibrate. The narrow on the screen togather with the beep signal alter guides you to find the location of the stud. Step 3: Find the location of the stud When the signal bar is full and the beep alarm is loudest it means you have found the center of an object.Mark it with your pencil. Then choose the Metal Scan mode to test whether it is a metal. After you confirm that it is not a metal it means that you found the center of a stud. (More details refer to the above description of Metal Scan Detection )Then you can drill it to hang thing.