Faithfull FAI DET31 User manual

This advanced electronic detector can detect and
locate wooden studwork, metal and AC voltage,
providing a clear indication of concealed objects
prior to drilling, nailing or screwdriving.
1. Find wood and metal studs.
2. Find and identify a stud centre
3. Find AC voltage and scan to trace live cables.
4. Metal scanning to find, nails, pipes, rebar and
other hidden metal objects.
This detector may be used to carry out the
following operations:
1. Find metal pipes in concrete.
2. Find wooden studwork
3. Find electrical box, exhaust vent, conduit,
rebar, and ducting.
4. Find and trace live cable behind ceiling, floors
and walls.
2
INTRODUCTION
FEATURES
APPLICATION

3. Bottom Signal LED
There are 2 bottom signal LEDs.
In most situations, the two bottom signal LEDs turn
on first when the detector approaches the target
object.
4. Power LED
It lights as a power indicator when the TEST button
is pressed.
5. TEST button
Use to turn the detector on. You must depress and
hold this switch down to calibrate the detector or
when you wish to perform detection operation.
6. Selector switch
A three position switch used to select the required
scan mode. Available scanning modes are:
STUD -
------ Stud scan mode
METAL ------ Metal scan mode
AC WIRE --- AC voltage scan mode
7. MARK button
In some conditions it is not suitable to make marks
with pencil. You can press this button to mark dots
on the wall surface.
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Stud Detection Procedure
1. Set the selector switch to "STUD" position.
2. Calibration:
Place the unit against wall. Depress and hold the
TEST button down, the detector will begin calibration.
When it sounds two beeps, the calibration is
complete. Always keep the TEST button depressed
throughout all the following procedures.
3. Detection:
a. Place the detector on the surface and slowly move
the unit sideways (fig 1). When the detector moves
closer and closer to the stud, the signal LEDs will
light sequentially from bottom to the top. When the
top signal LED lights and the built-in buzzer
sounds continuously, the unit has detected the
stud's edge. Stop moving and mark a spot in the
detectors groove on the walls surface (fig 2).
5
OPERATING INSTRUCTIONS
Fig.1 Fig.2 Fig.3

b. Continue moving sideways across wall until all the
signal LEDs and the buzzer turn off, then reverse
direction and locate opposing edge by using the
same procedure. When the LED lights and buzzer
sounds continuously stop moving and mark a spot in
the detectors groove on the walls surface (fig 3), the
midpoint between two marks is the centre of the stud.
Note
1. Stud detection can be carried out on standard
plasterboard walls. However, it may not function on
some types of foil backed or metallic fabric surfaces.
2. If the detector is placed over a wall batten or stud when
performing a calibration, the detector will not work correctly.
3. The surface of wall along which you want to detect
should be flat and dry.
4. We recommend that you also carry out a metal detection
scan to ensure that the detected batten or stud is not a
metal pipe. Please note that some small securing
screws or nails or metal objects may be detected.
5. Keep your other hand away from the detector when
carrying out a scan.
6. Wall studs will be approximately 40cm to 60cm apart
with a width of about 3.8cm.
7. If two studs are adjacent the unit may not detect them
accurately.
8. After you release the TEST button, the detector must
perform a calibration sequence again before use.
9. Do not move the detector too quickly as the RED
signal LEDs will not light sequentially.
6

Metal Detection Procedure
1. Set the selector switch to the "METAL" position.
2. Calibration:
Hold this detector in air away from any metal object,
Depress and hold the TEST button down, the
detector will begin calibration. When it sounds two
beeps, the calibration is complete.
Always keep the TEST button depressed throughout
all the following procedures.
3. Detection:
a.
Place the detector on the surface and slowly move
the unit sideways. When the unit moves closer and
closer to a metallic object, the signal LEDs will light
sequentially (fig 1). When the top signal LED lights
and the buzzer sounds continuously, the unit detects
the metallic object's edge, stop moving and mark a
spot in the groove (fig 2).
b. Continue moving sideways across wall until all the
signal LEDs and the buzzer turn off, then reverse
direction and locate the opposing edge by using the
same procedure. When the LED lights and buzzer
sounds continuously stop moving and mark a spot
in the detectors groove on the walls surface(fig 3), the
midpoint between two marks is the centre metal object.
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Fig.1 Fig.2 Fig.3

AC Voltage Detection Procedure
For maximum sensitivity, begin by placing the detector in a
position away from live wiring.
1. Set the selector switchtothe "AC WIRE" position.
2. Calibration:
Depress and hold the TESTbutton down , the detector
will begin calibration. When it sounds two beeps, the
calibration is complete. Always keep the TESTbutton
depressed throughout all the following procedures.
3. Detection:
a. Place the detector on the surface and slowly move the
unit sideways (fig 1). When the top signal LED lights
and buzzer sound continuously, stop moving, the
detector has located the edge of a live wire, mark a
spot in the groove on the walls surface (fig 2).
b. Continue moving sideways across wall until all the
signal LEDs and the buzzer turn off, then reverse
direction and locate the opposing edge by using the
same procedure. When the LED lights and buzzer
sounds continuously stop moving and mark a spot in
the detectors groove on the walls surface (fig 3), the
midpoint between two marks is the centre of live wire.
8
Fig.1 Fig.2 Fig.3

Note
1. Wires deeper than the detection limit from surface, in
conduit or behind plywood shear wall will not be
detected use caution when using the detector under
these circumstances.
2. Rubbing or banging the unit on the wall may generate
static electricity and cause a false indication.
3. Leakage Currents
Because of the extremely small current required to
cause a reading on the detector, an apparent false
reading may be seen in some situations, If a live wire
with poor insulation is touching a damp wall, the detector
will show a voltage on the walls surface Inthis situation,
the detector is indicating a potential hazard which should
be checked using a voltmeter.
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1. Depending on the proximity of electrical wiring or
pipes to the wall surface, the unit may detect
them in the same manner as studs.
Caution should always be used when nailing,
sawing, or drilling into walls, floors, and ceilings
that may contain wiring or pipes.
2. When working near electrical wires, always turn
off the mains power.
3. To avoid unexpected problems please be aware
that different types of material may be close
together. A stud, joist, pipe, metal object or wire
may be adjacent to each other.
4. If you do not intend to use the detector for an
extended time, please remove the battery before
storage.
5. For an accurate locating result, it is recommended
that user repeats the detection scan around the
detected object in different directions.
6. Shielded wires or live wires encased in metal
conduits, casings, metal walls or thick, dense
walls will not be detected.
10
NOTE

11
Detection
depth
SPECIFICATION
NOTE:
Detection depth and edge detection can vary due to
moisture content of materials, wall texture, paint, etc.
Operation condition -7~40°C below 75% RH
Storage condition -20~50°C below 85% RH
Battery 9V, 6F22 or equivalent
Dimension 163 x 74 x 26mm
Weight approx164g (including battery)
Stud mode
Metal mode
AC mode
Wood stud of 30x30mm: ≤14mm
Iron pipe of dia. 25mm: ≤25mm
Typical depth of 50mm for
90-250V at 50-60Hz.

If the built-in buzzer sounds 5 quick beeps after
you start depressing and holding the TEST button,
you should replace the battery immediately.
Remove the battery door, and disconnect the
depleted battery and replace with a new equivalent
9V battery. Replace the battery door correctly.
Depleted batteries should be disposed of at your
local recycling facility.
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DISPOSAL OF THIS PRODUCT
Dear Customer,
If you at some point intend to dispose of this
article, then please keep in mind that many
of its components consist of valuable
materials, which can be recycled.
Please do not dispose of it in the rubbish bin,
but check with your local council for recycling
facilities in your area.
BATTERY REPLACEMENT