Stanley Fatmax Stud Finder 400 Manual Verified ((full)) < 99% Best >

The Stanley FatMax Stud Finder 400 (often referred to interchangeably with the S300 or related multi-depth models) is designed to locate the center of wood and metal studs through various wall thicknesses. Quick Setup & Calibration

Proper calibration is critical; if done incorrectly, the device will either beep constantly or fail to find anything. Insert Battery: Use a fresh 9-volt alkaline battery.

Position: Place the device flat against the wall in a vertical orientation.

Calibrate: Press and hold the Activation Button on the side. The LCD will display "CALIBRATING" and then "READY" after 1–3 seconds. stanley fatmax stud finder 400 manual verified

Crucial: Do not move the device until you hear the completion beep.

Error: If the unit beeps intermittently or the lights flash immediately, you may be over a stud. Move it a few inches and try again. Operating Modes

The FatMax series typically offers multiple scanning depths and detection types: 1/2" (12mm) Mode: Standard for most drywall. The Stanley FatMax Stud Finder 400 (often referred

1" (25mm) Mode: Double-click the activation button for thicker walls. 1-1/2" (38mm) Mode: Triple-click for deep scanning.

AC/Metal Tracking: Some models require a "double-click" on a dedicated AC button to track live wires or metal pipes. stanley - fatmax. - Motek AS

The Gravity Test (Physical Verification)

Open your manual to the "Calibration" page. A verified manual will explicitly state: "Do not calibrate over a stud." If your manual omits this, it is a generic copy. The Gravity Test (Physical Verification) Open your manual

7. MAINTENANCE

What’s in the Box (Verified):

  1. Stanley FatMax Stud Finder 400 unit.
  2. Quick-start guide (full manual is digital).
  3. Marking pencil clip (integrated, but often overlooked).

Verification Note: If your device did not come with a printed manual, don’t panic. Stanley Black & Decker has moved to digital manuals. You can verify authenticity by checking the holographic sticker near the battery door.

The Warranty Clause

The verified manual includes a Limited Lifetime Warranty statement for the tool (excluding battery). Counterfeit manuals often list a 90-day warranty.

The LCD Display Icons