Note: The unit cannot be moved before calibration is complete.
• When the red LED goes off, the unit is calibrated.
• Keep holding the activation button during all of the following procedures.
Note: Once the Activation button is released, the unit shuts off.
• If the red LED stays lit, move the Stud Sensor 100 to a different location
and try again. Releasing the activation button will turn off the sensor.
Note: While calibrating, the Stud Sensor 100 must not be placed directly
over a stud, dense material such as metal, or over a wet or newly painted
area, or it will not properly calibrate.
• Slide the Stud Sensor 100 slowly across the surface in a straight line.
As it detects a stud, the red LED's will go on.
2) When it detects the stud's edge, the top LED will go on and an audible
tone will sound. Use the marking notch located at the top of the unit to
mark the stud edge.
3-4) Repeat the above steps from the other side of the stud. Coming from
the opposite direction, mark the other edge of the stud.
• The midpoint of the two marks indicates the stud's center.
Detecting Live AC Wires
The live wire red LED will illuminate and the Stud Sensor 100 sounds an
audible tone, warning when in the proximity (typically within 4" (10 cm) to
18" (46 cm) along the surface) of a live wire.
Warning! This tool is not a measuring device and should not be used
as a substitute for a voltmeter.
Warning! The live wire red LED on the display is just an indicator
and in some situations the voltage detection option may not accurately
indicate the presence of voltage in the event of internal device failure or
improper operation, and therefore should not be relied upon for
identification of the presence of hazardous voltages. Other evidence such
as construction blueprints or visual identification of wiring or conduit entry
points should also be utilized.
Always turn off AC power when working near wiring.
Always follow proper safety practices and use a separate detection
method to verify a de-energized condition prior to commencing work.
Note: Static electrical charges that can develop on drywall and other
surfaces will spread the voltage detection area many inches on each
side of the actual electrical wire. To aid in locating the wire position, scan
holding the unit ½" (12 mm) away from the wall surface or place your
other hand on the surface approximately 12" (30 cm) from sensor.
Warning!: Shielded wires or wires in metal conduits, casings,
metallized walls or thick, dense walls will not be detected.
Cautions on Operating
You should always use caution when nailing, cutting and drilling in walls,
ceilings and floor that may contain wiring and pipes near the surface.
Always remember that studs or joists are normally spaced 16" (41 cm)
or 24" (61 cm) apart and are 1½ " (38 mm) in width. To avoid surprises,
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