Zircon SL-AC プリント

Replace the clip.
Battery will last

approximately two years
under normal conditions.

With StudSensor Pro SL-AC
turned off, position the unit

flat against the wall.

Without moving unit, squeeze
and hold On/Off button.

TruCal

®

LED should be lit.

Squeeze sides of
clip to help

release clip end.

Slide 9-V battery
into compartment,

terminal side first,
matching (+) and (–) 
terminals from battery to case.

Continue to hold 
in the On/Off 

button then slowly slide
unit horizontally across
the wall, right or left.

As you begin to approach a stud, the red LEDs
will light successively, from bottom to top.

Continue scanning
beyond marked

spot until green LED goes
out. Slide unit in reverse
direction to locate other
edge of stud.

Mark this second
spot. Middle of stud

is centered between the
two marks.

The StudSensor Pro
SL-AC detects from

90 to 250 V at 50 to 60 Hz
AC in a hot electrical wire.
The voltage detection 
feature works continuously
in both Stud Scan and
DeepScan modes. When
sensing voltage, the small
AC light comes on.

The Zircon StudSensor

™

Pro SL-AC

detects wood and metal studs 
and joists in walls, floors, and 
ceilings. It features two scanning
modes, recessed LEDs, a durable 
high-impact case, and the 
patented SpotLite

®

Pointing System.

It also has WireWarning

™

to continuously detect hot 
AC voltage in both modes.

Depending on the proximity of electrical wiring
or pipes to the wall surface, the scanner may

detect them in the same manner as studs. Caution
should always be used when nailing, cutting, or
drilling in walls, floors, and ceilings that may contain
these items.

To avoid surprises, remember that studs or joists are
normally spaced 16 in. (406 mm) or 24 in. (610 mm)
apart and are 1

1

⁄

2

in. (38 mm) in width. Anything

closer together or a different width may not be a
stud, joist, or firebreak. Always turn off the power
when working near electrical wires.

Lights start flashing and
unit starts beeping.

Center green LED doesn’t
light in Stud Scan mode.

The green TruCal LED
lights but, when scan-
ning, unit doesn't do
anything else.

All three red LEDs and
green LED light at the
same time and unit
beeps continuously.

Working in DeepScan
mode and can’t detect
studs.

Detects other objects
besides studs.

You suspect electrical
wires, but do not 
detect any.

Area of voltage detection
is too large.

• Scan began on dense part of

wall or over a stud.

• Unit not flat against wall.
• Unit tilted or lifted during scan.

(All these factors affect proper
calibration.)

• Wall is particularly thick or

dense.

• Unit may not be flat against

the wall.

• If it is in the DeepScan mode

(the DeepScan LED is lit), you
may have calibrated over a stud.

• Scanning surface is too dense

or too wet for unit to operate.

• You may have calibrated over 

a stud. (The error condition is 
disabled in DeepScan mode
because it is twice as sensitive
as Stud Scan.) 

• You may be holding the unit

like a TV remote, aiming it at
the wall.

• Electrical wiring and metal or

plastic pipes may be near or
touching back surface of wall.

• Wires may be shielded behind

metallic wall coverings,
plywood shearwall or other
dense material, or in conduit;
StudSensor Pro SL-AC may not
be able to find them.

• The wires may not be hot.
• Wires may be too deep to sense.

• Static charge may develop on

drywall, spreading voltage
detection as much as 12 in.
(305 mm) from each side of 
an actual electrical wire.

• Turn unit off, move over a few inches, press On/Off button,

and start again.

• On rough surfaces, place piece of paper on wall, scanning

through it to help slide unit more smoothly.

• Keep hand at least 6 in.(152 mm) from StudSensor 

Pro SL-AC while you calibrate and scan. Hold unit with 
thumb and index finger no higher than handgrips. Be 
careful not to move your fingers after calibration.

• Always hold unit parallel to and move perpendicular to 

object you’re trying to locate.

• Interpret red LED closest to center as stud edge.
• Switch to DeepScan to locate the stud.

• Hold unit so two Velcro

™

strips on the back make 

contact with wall.

• Recalibrate unit in a different place and rescan area.

• If you are using unit on a recently taped, painted, or 

wallpapered wall, allow time to dry and try again.

• Move StudSensor Pro SL-AC over a few inches 

and recalibrate.

• Hold unit so two Velcro

™

strips on the back make 

contact with wall.

• Remember that studs or joists are normally spaced 16 in.

(406 mm) or 24 in. (610 mm) apart and are 1

1

⁄

2

in.

(38 mm) wide.

• Always turn off power when cutting, nailing, or drilling 

near electrical wires.

• See above solution.
• Use extra caution if the area has plywood, thick wood 

backing behind drywall, or thicker-than-normal walls.

• If a switch controls an outlet, make sure it is ON for 

detection, but turned off when working near electrical wires.

• To narrow detection, turn unit off and on again at the edge

of where wire was detected and scan again.

StudSensor Pro SL-AC is for use on dry, interior walls only. Although StudSensor Pro
SL-AC can scan through up to 
1

1

⁄

2

in. (38 mm) of common construction materials in DeepScan mode, three pri-

mary factors can affect sensing depth: thickness, density, and moisture content.
StudSensor Pro SL-AC can scan effectively through most sheet materials, including:
• Bare wood flooring (in DeepScan mode)
• Linoleum on wood base 
• Gypsum drywall over plywood sheathing 
• Wallpapered walls (if dry)
• Textured ceilings if uniform thickness (Place a thin piece of cardboard on ceiling

and scan through it to avoid damage 
to texturing.) 

StudSensor Pro SL-AC is not designed to scan materials with inconsistent density
such as:
• Ceramic floor tile
• Carpeting and padding
• Wallpaper with metallic fibers
• Freshly painted walls that are still damp (must dry at least 

a week)

• Lath and plaster walls 
• Foil covered insulation board

FCC Part 15 Class B Registration Warning
This equipment has been tested and found to comply with the limits for a Class B digital device, pur-
suant to Part 15 of FCC Rules. These limits are designed to provide reasonable protection against
harmful interference when the 
equipment is operated in a residential installation. This equipment generates, uses, and can radiate
radio frequency energy and, if not installed and used in accordance with 
the instructions, may cause harmful interference to radio communications. However, there is no guar-
antee that 
interference will not occur in a particular installation. If 
this equipment does cause harmful interference to radio or television reception, which can be deter-
mined by turning the equipment off and on, the user is encouraged to try to correct the interference
by one or more of the following measures:
(1) Reorient or relocate the receiving antenna.
(2) Increase the separation between the equipment and receiver.
(3) Connect the equipment into an outlet on a circuit,

different from that which the receiver is connected 
(if applicable).

(4) Consult the dealer or an experienced radio/TV 

technician for help.

When the top green
LED is lit, a steady

tone sounds, and the
SpotLite

®

shines, you

have located the edge of
the stud. Mark this spot.

Slide the Mode Selector
switch to the desired

scanning mode. The mode can
be selected with the unit on
or off.