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DeepScan

®

Metal Scan

StudScan

AC Scan

DeepScan

®

Metal Scan

StudScan

AC Scan

DeepScan

®

Metal Scan

StudScan

AC Scan

   MultiScanner

 L550 

OneStep

Multifunction Wall Scanner

1. INSTALLING THE BATTERY

Push in the battery door tab at the bottom of the 

tool and open the door. Insert a new 9V 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 9V battery with a  

brand new battery immediately.
Zircon stud finders and detectors, particularly those with LCD screens, 

require and consume a great deal of current from batteries.  For optimal 

performance, brand-new, recently purchased alkaline batteries are strongly 

recommended for use in these tools.  If you are experiencing any trouble 

with your tool, please replace the battery in your tool with a brand-new 

one, contact your Zircon dealer or e-mail at [email protected].

2. OPERATING TIPS

For optimum scanning results, it is important to properly hold MultiScanner

  

 

L

550 and move slowly when scanning. The following tips will ensure 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 or above the running board 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.

•  Keep 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 40 or 

60 cm apart and are 38-45 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.
SCANNING DIFFERENT SURFACES
Wallpaper: 

The MultiScanner

 

 

L

550 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.
Freshly painted walls: 

May take one week or longer to dry after application.

Lath & plaster:

 Due to irregularities in plaster thickness, it is difficult for the 

MultiScanner

 

 

L

550 to locate studs in StudScan Mode. Change to Metal Scan 

Mode to locate the nail heads holding wood lath to the studs. If the plaster has 

metal mesh reinforcement, MultiScanner

 

L

550 will be unable to detect through 

that material.

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 in DeepScan

®

 mode.  If irregular 

scanning results are received, switch to Metal Scan mode to locate nails or 

drywall screws that line up vertically where a stud or joist is positioned.

Wood flooring, subflooring, or gypsum drywall over plywood 

sheathing:

 Use 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.
MultiScanner

 

 

L

550 cannot scan for wood studs and joists through carpeting 

and pad. In problematic situations, try using Metal Scan to locate nails or 

drywall screws that line up vertically where a stud or joist is positioned.

Note: Sensing depth and accuracy can vary due to moisture content of 
materials, wall texture, and paint.

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 40 and 60 cm stud spacing practices.

3. SELECTING THE MODE

Move selector switch to the desired mode: StudScan for finding wood or metal 

studs; DeepScan

®

 for scanning walls over 19 mm; Metal Scan for locating 

metal; or AC Scan for locating live AC wiring.
Unit will remain off if Power Button is not pressed.

4. TURNING ON/CALIBRATING THE TOOL

MultiScanner

 

 

L

550 can be calibrated anywhere on the wall. It constantly 

monitors the subsurface environment 10 times per second and automatically 
recalibrates, when needed, to successfully find the centre of studs in one step.
•  Place MultiScanner

 

 

L

550 against the wall 

before

 pressing the Power 

Button in StudScan or DeepScan

®

.

•  Once powered on, tool will automatically perform all calibrations. The 

LCD will 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. Continue to press Power 

Button down and keep the tool flat against the wall and begin scanning.

Note: It is important to wait for calibration to complete (1–2 seconds) before 

moving the scanner. 

6. WIREWARNING

®

 

DETECTION

Zircon’s WireWarning

®

 detection feature works continuously in StudScan, DeepScan

®

and Metal Scan modes. When live AC voltage is detected, the WireWarning

®

 detection 

indicator will appear in the display. If scanning begins over a live AC wire, the AC  

indicator will flash continuously. Use extreme caution under these circumstances or 

whenever live AC wiring is present.

Electrical field locators may not detect live AC wires if wires 

are more than 50 mm from the scanned surface, 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.

 

7. SCANNING IN METAL MODE

Note: When scanning for studs, use StudScan mode (or DeepScan

®

 

mode on thicker 

walls) to quickly locate the centre and edges. Use Metal Scan to determine if the 

previous reading in StudScan was a wood stud, metal stud, or pipe. In Metal Scan, 

only metal drywall screws will be found in wood studs, while metal will be indicated 

everywhere on a metal stud or pipe.

Metal Scan has interactive calibration to adjust its sensitivity to metal, which can 

be used to find the precise location of metal objects in walls, floors, and ceilings. 

Maximum sensitivity is ideal for quickly finding the approximate location of metal. 

However, sensitivity can be reduced by calibrating the tool closer to metal.  

With reduced sensitivity, the area where metal is indicated will be smaller. But in  

both cases, the metal target is in the centre of the area where the tool indicates  

metal is present.
1. Move mode switch to Metal Scan mode. For maximum metal sensitivity, turn the 

tool on in the air by pressing and holding the Power Button. This will ensure that it 

calibrates away from any metal objects. (The tool can only be calibrated off the wall  

in Metal Scan mode.)
2. 

(Figure A)

 While holding the Power button, press the tool flat against the wall and 

slowly slide the scanner across the surface. Mark the point where you get the highest 

metal indication (the most Target Indication bars on the screen). If it is a strong target, 

the SpotLite

®

 Pointer will also shine a beam of light and a steady beep will sound. 

Continue in the same direction until display bars reduce. Reverse direction and mark 

the spot where the display bars peak from the reversed direction.  

The midpoint of the two marks is the location of the centre of the metal object.
If the unit indicates metal over a large area, you can refine the scanning area to more 

accurately locate the metal target by following Steps 3 and 4 below.
3. 

(Figure B)

 To further pinpoint the location of the metal target, scan the area again. Release 

the Power Button and then turn the unit back on, this time starting on the wall over one of the 

previous marks. This will reset the tool to a lower sensitivity and narrow the scan area. 
4. 

(Figure C)

 To continue to reduce sensitivity and further refine the scanning area, repeat Step 

3. This procedure can be repeated multiple times to narrow the field even further.

Note: If any bars display on the screen, metal is present. Small targets or targets deep within the 

surface may only illuminate some of the bars and not the centre line or audio tone. In this case, 

use the highest indication to determine the metal position.

8. SCANNING IN AC MODE

As with Metal Scan Mode, AC Scan Mode has interactive calibration and works in the  

same manner. 
1. 

(Figure A) 

Move mode switch to AC Scan mode. Press the tool flat against the wall,  

then press and hold the Power button. Wait for the beep to confirm calibration has  

completed before moving the tool. Once calibration has completed, slowly slide the scanner 

across the surface. Mark the location where you get the highest AC indication (the most Target 

Indication bars on the screen). If it is a strong target, the SpotLite

®

 Pointer will also shine a 

beam of light and a steady beep will sound. Continue in same direction until display bars 

reduce. Reverse direction and mark the spot where the display bars peak from the reversed 

direction. The midpoint of the two marks is the location of the centre of the live AC wiring.  

If the unit indicates live electricity over a large area, you can reduce the sensitivity of the tool 

to refine the scanning area and more accurately locate the live AC wiring by following Steps 2 

and 3 below.
2. 

(Figure B) 

To further pinpoint the location of the live AC wiring, scan the area again. 

Release the Power Button and then turn the unit back on, this time starting on the wall  

over one of the previous marks. This will reset the tool to a lower sensitivity and narrow the 

scan area. 
3. 

(Figure C) 

Scan in both directions as in Step 2. The area indicated should become smaller so 

you can more precisely identify the location of live AC wires. This procedure can be repeated to 

narrow the field even further. 

Note: AC Scan Mode will only detect live (hot) unshielded AC wiring. Please refer to the 

WARNING statement in number 6, WireWarning

®

 Detection, for more important details and 

warnings about AC detection.

Detects other objects besides studs 

in StudScan Mode. 

Finds more targets than there  

should be.

Area of voltage appears much 

larger than actual wire (AC only).

Difficulty detecting metal.

Image of metal object appears 

wider than actual size.

Constant readings of studs near 

windows and doors.

You suspect electrical wires, but do 

not detect any.

 

 

Flashing Low Battery Indicator and 

tool not operating

• Electrical wiring and metal/plastic pipes may be  

near or touching back surface of wall.

• Voltage detection can spread on drywall as much as 30 cm 

laterally from each side of an actual electrical wire.

• Tool calibrated over metal object.

• Metal targets too deep or small.

 

• Metal has greater density than wood.

• Double and triple studs are usually found around doors 

and windows. Solid headers are above them.

• Wires are shielded by metal conduit, a braided wire layer, 

metallic wall covering, plywood shear wall, or other dense 

material.

• Wires deeper than 50 mm from surface might  

not be detected.

• Wires may not be live.

• Battery level too low for proper operation.

• Scan the area in Metal Scan  and AC Scan modes to determine if metal or hot AC is present.

• Check for other studs equally spaced to either side 30, 40, or 60 mm apart or for the 

same stud at several places directly above or below the first scan area.

• A stud reading would measure approximately 38-45 mm apart from each edge; any-

thing larger or smaller is most likely not a stud if not near a door or window.

• To narrow detection, turn unit off and on again at the edge of where wire was first 

detected and scan again.

• The scanner may have been calibrated over a metal object, reducing sensitivity.  

Try calibrating in another location.

• Scan in both horizontal and vertical directions. Metal sensitivity is increased when  

metal object is parallel to sensor, located under Zircon logo.

• To reduce sensitivity, recalibrate MultiScanner

™ 

 

L

550 over either of first two marks 

(Metal Mode only).

• Detect outer edges so you know where to begin.

 

 

• Try Metal Scan to see if you can find metal, wire, or metal conduit.

• 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 in walls, floors, and ceilings  

where these items may exist. 

• Replace with brand new 9V battery.

9. HELPFUL HINTS

 

(See also number 2, OPERATING TIPS)

 

Situation

Probable Cause

Solution

The MultiScanner

 

L

550 OneStep

 features four 

scanning modes:
• StudScan Mode: Locates the centre and edges of 

wood and metal studs up to 19 mm deep

• DeepScan

®

 Mode: Locates the centre of wood

  and metal studs up to 38 mm deep
• Metal Scan: Detects ferrous (magnetic) metal (such 

as 13 mm diameter rebar) up to 76 mm deep and 

non-ferrous (non-magnetic) metal up to 38 mm deep

• AC Scan: Detects live unshielded AC wires up to 50 

mm deep 

Figure A

Figure B

Figure C

DeepScan

®

Metal Scan

StudScan

AC Scan

GB

ACT

(Auto Correcting Technology)

 

During scanning, the tool will automatically  

recalibrate itself when needed. This recalibration  

is usually transparent and no indication is made.  

If the tool is initially calibrated near a stud and  

then moved away (it will detect the density of  

the wall decreasing), an arrow icon will be  

illuminated, indicating the direction of the missed stud.

5. FINDING A STUD

Always scan for studs with the scanner placed flat against the wall. Move the mode switch 

to StudScan, place the tool flat against the wall, then press and hold the Power Button. Wait 

for beep to confirm calibration has completed before moving scanner. 

Slowly slide tool across  

surface. EDGE indication  

will illuminate, indicating  

location of the stud edge.

Continue sliding tool. When the centre of a stud is 

located, the three bars on the Signal Strength Indicator, 

the middle 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 centre of 

the stud is located only two bars will show on the Signal 

Strength Indicator and only the SpotLite

®

 Pointer and middle 

segments of the Target Indication Bars will illuminate. If you 

still cannot locate a stud, try DeepScan

®

 mode.

WARNING

WARNING

WARNING

LIMITED 2 YEAR WARRANTY

Zircon Corporation, (“Zircon”) warrants this product to be free from defects in materials and 

workmanship for two years from the date of purchase. Any in-warranty defective product 

returned to the place of purchase with proof of purchase date will be replaced at retailer´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 two 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.

www.ZirconEurope.com 

E-mail: [email protected]

© 2016 Zircon Corporation • P/N 67798 • Rev B 08/16

Visit www.ZirconEurope.com for the most current instructions.

ACT, DeepScan, MultiScanner, OneStep, SpotLite, WireWarning, and Zircon are registered trademarks or trademarks of Zircon Corporation.

ZirconCorporation

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SpotLite

®

 Pointer

Illuminated "V" Marker Groove

Mode  

Selector  

Switch

Battery Door Tab

StudScan / 

DeepScan

®

  

Mode Indicator

Low Battery  

Indicator

AC Mode & 

WireWarning

®

 

Detection  

Indicator

Backlit LCD

Target 

Indication 

Bars

Center/Edge/Metal 

Indicator

Auto Correcting 

Indication Arrows

Signal Strength 

Indicator

Power Button

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