Stanley Fatmax Stud Finder 400 Manual Here

To get accurate results, you have to follow a specific sequence. Most errors with electronic stud finders come from rushing the calibration phase. Check the Battery : The unit requires a 9V alkaline battery

Maintaining firm pressure against the wall, slide the stud finder slowly and horizontally across the surface. The LCD screen will show signals as you approach the stud. stanley fatmax stud finder 400 manual