SCANNING DIFFERENT SURFACES
Freshly painted walls:
May take one week or longer
to dry after application.
Wallpaper:
The StudSensor
™
L
70 functions normally
on walls covered with wallpaper or fabric, unless the
materials are metallic foil, contain metallic fibers, or are
still wet after application. Wallpaper may need to dry for
several weeks after application.
Extremely textured walls or acoustic ceilings:
When scanning a ceiling or wall with an uneven surface,
place thin cardboard on the surface to be scanned and
scan over the cardboard. Calibrate, with cardboard in
place, in DeepScan
®
mode.
Wood flooring, subflooring, or
gypsum drywall over plywood
sheathing:
Use the DeepScan
®
mode and move the tool slowly.
The Signal Strength Indicator may
only display 1 or 2 bars when the
tool locates a stud through thick
surfaces.
Lath & plaster:
Due to
irregularities in plaster thickness,
this tool is not recommended for
use on lath & plaster.
StudSensor
™
L
70 cannot scan for
wood studs and joists through
concrete or carpeting and pad.
In StudScan mode, the StudSensor
™
L
70 will NOT be
able to scan through dense materials such as glass,
ceramic tile, and foil.
Note: Sensing depth and accuracy can vary due to
moisture, content of materials, wall texture, and paint.
Electrical field locators may
not detect live AC wires
if wires are more than 2 in. (51 mm) from the
scanned surface, in concrete, encased in conduit,
present behind a plywood shear wall or metallic
wall covering, or if moisture is present in the
environment or scanned surface.
DO NOT ASSUME THERE
ARE NO LIVE ELECTRICAL
WIRES IN THE WALL. DO NOT TAKE ACTIONS THAT
COULD BE DANGEROUS IF THE WALL CONTAINS
A LIVE ELECTRICAL WIRE. ALWAYS TURN OFF THE
ELECTRICAL POWER, GAS, AND WATER SUPPLIES
BEFORE PENETRATING A SURFACE. FAILURE TO
FOLLOW THESE INSTRUCTIONS MAY RESULT IN
ELECTRIC SHOCK, FIRE, AND/OR SERIOUS INJURY
OR PROPERTY DAMAGE.
Always turn off power when working near
electrical wires.
Do not rely exclusively on
the detector to locate items
behind the scanned surface. Use other information
sources to help locate items before penetrating
the surface. Such additional sources include
construction plans, visible points of entry of pipes
and wiring into walls, such as in a basement, and
in standard 16 and 24 in. (41 and 61 cm) stud
spacing practices.
3. TURNING ON/CALIBRATING THE TOOL
Place StudSensor
™
L
70 flat against the wall, then press
and hold the Power button. The LCD will illuminate
and display all icons until calibration is complete. Upon
completion of calibration, the SpotLite
®
Pointer and
buzzer will momentarily activate and the tool will begin
continuous measurements.
Note: It is important to wait for calibration to
complete (1–2 seconds) before moving the scanner.
ACT
™
(Auto Correcting Technology):
During
scanning, the tool will provisionally recalibrate itself
when needed. This recalibration is usually transparent
and no indication is made. If an arrow icon illuminates,
the tool was calibrated near or over a stud and then
moved away. The arrow indicates the direction of the
missed stud.
The Zircon StudSensor
™
L
70 OneStep
®
detects both the
center and edges of wood and metal studs and joists in
walls, floors, and ceilings in one step. It features a
backlit display, low battery indicator, and patented
SpotLite
®
Pointer. WireWarning
®
detection also
automatically detects and alerts you of live AC wires.
1. INSTALLING THE BATTERY
Push in the battery door tab
at the bottom of the tool and
open the door. Insert a new 9-volt
battery, matching the positive (+)
and negative (-) terminals to the icons
printed on the back. Snap the battery
into place and replace the door.
Low Battery Indicator:
The Low Battery Indicator
icon displays when the battery level is getting low.
While the tool will still operate, the battery will need to
be replaced soon. When the battery icon begins to flash
and is the only icon displayed on the screen, the battery
level is too low and not sufficient to power the tool for
proper operation. Please replace the 9-volt battery with
a brand new battery immediately.
2. OPERATING TIPS
For optimum scanning results, it is important to
properly hold StudSensor
™
L
70 and move slowly when
scanning. The following tips will provide more accurate
scanning results:
• Grasp the handle with your thumb on one side
and your fingers on the other side. Make sure your
fingertips are resting on the tool and not touching
the surface being scanned or the scanning head of
the tool.
• Hold the tool straight up and down, parallel to the
studs, and do not rotate the tool.
SpotLite
®
Pointer
Signal
Strength
Indicator
Backlit LCD
Display
Battery Door Tab
Edge/Center
Indication
Low Battery
Indicator
Auto
Correcting
Indication
Target
Indication
Bars
AC
WireWarning
®
Detection
Indicator
StudScan/
DeepScan
®
Mode
Indicators
Power
Button
LIMITED 1 YEAR WARRANTY
Zircon Corporation, (“Zircon”) warrants this product to be free from defects in materials and workmanship for one year from
the date of purchase. Any in-warranty defective product returned to Zircon*, freight prepaid with proof of purchase date and
$5.00 to cover postage and handling, will be repaired or replaced at Zircon’s option. This warranty is limited to the electronic
circuitry and original case of the product and specifically excludes damage caused by abuse, unreasonable use or neglect.
This warranty is in lieu of all other warranties, express or implied, and no other representations or claims of any nature shall
bind or obligate Zircon. Any implied warranties applicable to this product are limited to the one year period following its
purchase. IN NO EVENT WILL ZIRCON BE LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING
FROM POSSESSION, USE OR MALFUNCTION OF THIS PRODUCT.
In accordance with government regulations, you are advised that: (i) some states do not allow limitations on how long an
implied warranty lasts and/or the exclusion or limitation of incidental or consequential damages, so the above limitations
and/or exclusions may not apply to you, and further (ii) this warranty gives you specific legal rights and you may also have
other rights which vary from state to state.
Return product freight prepaid with proof of purchase date (dated sales receipt) and $5.00 to cover postage and handling, to:
Zircon Corporation
*Attn: Returns Department
1580 Dell Avenue
Campbell, CA 95008-6992 USA
Be sure to include your name and return address. Out of warranty service and repair, where proof of purchase is not
provided, shall be returned with repairs charged C.O.D. Allow 4 to 6 weeks for delivery.
Customer Service, 1-800-245-9265 or 1-408-963-4550
Monday–Friday, 8:00 a.m. to 5:00 p.m. PST
www.zircon.com
[email protected]
©2014 Zircon Corporation • P/N 66529 • Rev B 10/14
• Keep the tool flat against the wall and do not rock
or tilt the tool when slowly sliding across the surface
being scanned.
• Avoid placing your other hand, or any other part of
your body, on the surface being scanned. This will
interfere with the tool’s performance.
• If you're receiving erratic scanning results, it may be
a result of humidity, moisture within the wall cavity
or drywall, or recently applied paint or wallpaper that
hasn't fully dried. While the moisture may not always
be visible, it will interfere with the tool's sensors.
Please allow a few days for the wall to dry out.
• 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 or 24 in. (41 or 61 cm) 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 power when working near
electrical wires.
ACT, DeepScan, OneStep, SpotLite, StudSensor, WireWarning, and Zircon are registered trademarks or trademarks of Zircon Corporation.
All LCD segments turn on at
the same time and the tool
beeps continuously.
Detects other objects
besides studs.
You suspect electrical
wires, but do not
detect any.
Flashing Low Battery Indicator
and tool not operating
• Unit not flat against wall.
• Unit tilted or lifted during scan. (All these factors affect
proper calibration.)
• Scanning surface is too dense or too wet for unit to operate.
• Electrical wiring and metal or plastic pipes may be near
or touching back surface of wall.
• Wires are shielded by metal conduit, a braided wire layer, behind
metallic wall coverings, plywood shear wall, or other dense material.
• Wires may not be live.
• Wires deeper than 2 in. (51 mm) from surface might not
be detected.
• Battery level too low for proper operation.
• When scanning an uneven surface, place thin cardboard on the surface to be scanned and scan over
the cardboard in DeepScan
®
mode.
• Grasp the handle with your thumb on one side and your fingers on the other side, not touching the
surface being scanned or the scanning head of the tool.
• Hold the tool straight up and down, parallel to the studs, and do not rotate the tool.
• If you are using unit on a recently taped, painted, or wallpapered wall, allow time to dry and try again.
• While unit is still on, quickly release and re-press the Power button to enter DeepScan
®
mode.
• Check for other studs equally spaced to either side 12, 16, or 24 in. (30, 41, or 61 cm) apart or check
for the same stud at several places directly above or below the first finding. Studs will run straight up
and down from floor to ceiling while pipes may change direction.
• A stud reading would measure approximately 1
1
⁄
2
in. (38 mm) apart from each edge; anything larger
or smaller is most likely not a stud if not near a door or window.
• 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.
Use CAUTION when nailing, sawing, or drilling into walls, floors, and ceilings where these items
may exist.
• Replace with brand new alkaline 9 V battery.
8. HELPFUL HINTS
(See also Section 2, Operating Tips)
Situation
Probable Cause
Solution
FCC Part 15 Class B Registration Warning
This device complies with Part 15 of FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference,
and (2) this device must accept any interference
received, including interference that may cause
undesired operation.
7. WIREWARNING
®
DETECTION
Zircon’s WireWarning
®
detection works continuously.
When live AC voltage is detected, the AC WireWarning
®
indicator will appear in the display.
If scanning begins over a live AC wire, the AC
WireWarning
®
indicator will flash continuously. Use
extreme caution in these circumstances or whenever live
AC is present.
WARNING
4. FINDING A STUD
Always start with the scanner placed flat against the
wall, then press the Power button. Wait for beep to
confirm calibration has completed before moving the tool.
Slowly slide tool across
surface. EDGE indication will
illuminate, indicating location
of the stud edge.
Continue sliding tool.
When the center of stud is
located with three bars
on the Signal Strength
Indicator, some segments of
the Target Indication bars,
CENTER indication, and
SpotLite
®
Pointer will all
illuminate, and the buzzer
will sound.
In cases of deeper studs
(thicker walls), when the
center of the stud is located
only two bars will show on
the Signal Strength Indicator
and only the SpotLite
®
beam,
and some segments of the
Target Indication bars will
illuminate. If you still can’t
locate a stud, try the next step.
Note: The tool may detect other objects behind the wall
such as pipes and conduit. See Section 2: Operating Tips
for ways to confirm that you found a stud.
5. DIFFICULTY LOCATING A STUD?
TRY DEEPSCAN
®
MODE
If you have difficulty locating a stud after following
Section 4, it could be that the stud is deep (the walls
are thick). With the unit still placed flat against the
wall and turned on, quickly (within one second)
release and re-press the Power button. The StudScan
mode indication will turn off and the DeepScan
®
mode
indication will turn on,
indicating that the tool
has entered DeepScan
®
mode. The center of a
very deep stud will be
indicated by some
segments of the Target
Indication bars illuminating.
6. MARKING THE CENTER OF THE STUD
Once an object is located, mark the location where
the SpotLite
®
Pointer illuminates. This is the center of
the stud.
EN
StudSensor
™
L70
OneStep
®
Center-Finding Stud Finder
WARNING
WARNING
Visit www.zircon.com/support for the most current instructions.
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