Stanley Fatmax Stud Finder 400 Manual //top\\ – Reliable

Wait for the device to beep or for the green "Ready" LED to stop flashing. This indicates calibration is complete.

AC warning flashes constantly.

: For maximum accuracy, scan once from left-to-right and once from right-to-left. The center of the stud should be exactly between where the two signals peak. Avoid "Hot" Areas stanley fatmax stud finder 400 manual

: Ensure your free hand is at least 6 inches away from the sensor to prevent interference. Wait for the device to beep or for

| Problem | Likely Cause | Solution (from manual) | |--------|--------------|--------------------------| | | Calibration error or metal foil wallpaper | Re-calibrate over a known empty space. If wall has foil, use a magnet instead. | | No response / no lights | Dead battery or corroded terminals | Replace 9V battery. Clean terminals with a pencil eraser. | | Inconsistent readings | Moving too fast or tilted base | Keep the unit flat. Move slower (1-2 inches/sec). | | Finds “studs” where none exist | Dense plumbing pipes or metal corner beads | Scan vertically and horizontally. Pipes will give a narrow, single-edge reading. | | Unit won’t power off | Stuck button or internal fault | Remove battery for 10 seconds to reset. | : For maximum accuracy, scan once from left-to-right