Velleman VTMVS2 Mode D'emploi page 2

edge of the stud. Mark this spot. Continue scanning beyond that spot until the LEDs start to go out. Slide in reverse
direction to locate the other edge of the stud. Mark this second spot.
2. Calibration and Detection for Metal
Hold the device firmly against the surface. Press the ON/OFF button, set the switch to the
adjust the right sensitivity knob until the two bottom green LEDs are lit. Then, carefully turn the sensitivity knob back
until the LEDs go out. The unit is now calibrated for metal.
To set the depth sensitivity of the device, place the sensor over a metal object at the desired depth and turn the
device on. Perform the same steps as above. The actual depth will vary with the type and size of metal used.
Slowly slide the device across the wall. As you begin to approach a metal object, the green LEDs will light
successively, from bottom to top. When the centre two red LEDs are lit and a steady audible sound is emitted, you
have located the edge of the metal object. Mark this spot. Continue scanning beyond that spot until the LEDs start to
go out. Slide in reverse direction to locate the other edge of the object. Mark this second spot.
When metal sensing is set to maximum depth sensitivity and the sensed metal object is close to the device (example:
metal behind 1/2 inch drywall) the apparent width of the sensed metal can be very wide. To determine the true metal
size, place the unit at the approximate centre of the indicated area and re-calibrate the unit. Then re-scan the area:
repeat this procedure until the size of the metal is determined.
3. Calibration and Detection for Live Wires
Set the function switch to the
detection: when the device detects live AC wiring, all LEDs blink and a short sound is emitted. Adjust the right
sensitivity knob until the LEDs are off, but only just. The unit is now calibrated for voltage.
Slowly slide the device across the wall. When the LEDs flash and a sound is emitted, you have located AC wiring.
Reduce the sensitivity by turning back the sensitivity knob just a little and then re-scan to get an accurate location of
the AC line.
3. Tips and Warnings
• Shielded wires or live wires in metal conduits, casings, metal walls or thick, dense walls may not be detected.
• The VTMVS2 is designed to detect 110 and 220Vac live electrical wires. Live wires >220V will also be detected.
• Always be cautious when nailing, cutting or drilling in walls, ceilings and floors that may contain wiring or pipes
near the surface. Shielded, dead, telephone, TV or non-powered wiring will not be detected as live wires.
Always turn AC power off when working near wiring to avoid exposure to high voltages.
• To ensure the best performance for VTMVS2, the unit should be held properly with the hand on the lower portion
of the unit. Keep your free hand at least 6 inches away from the unit while testing or scanning surfaces.
• There will be no difference in the function of VTMVS2 on surfaces covered with wallpaper or fabric unless the
covering used contains metallic foil or fibres.
• In concrete, metal can be detected up to 3/4 inches deep.
• When dealing with a rough surface such as a sprayed ceiling or a concrete wall, use a piece of cardboard when
scanning the surface. Run through the calibration as described above with the piece of cardboard in place. Also, it
is particularly important in this application to remember to keep your free hand away from the unit.
4. Specifications
Utilizing the procedures in this manual, the VTMVS2 will find the centre of wood or metal studs or live wires through
3/4 inch surfaces with 1/8 inch accuracy.
Water Resistance
Operating Temperature
The information in this manual is subject to change without prior notice.
VTMVS2
(voltage) position. The voltage detection signal differs from the stud or metal
Water resistant, but not waterproof.
-7°C to +49°C (+20°F to + 120°F)
2
(metal) position and
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