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Battery Cautions Cont’d.

• Do not short battery terminals.
• Do not charge batteries.
• Remove dead battery immediately and dispose of per local codes.
• Do not dispose of batteries in fire.
• Keep batteries out of reach of children.
• Remove battery if the device will not be used for several months.

Transporting batteries can possibly cause fires if the battery terminals inadvertently come in
contact with conductive materials such as keys, coins, hand tools and the like. The US
Department of Transportation Hazardous Material Regulations (HMR) actually prohibit
transporting batteries in commerce or on airplanes (i.e. packed in suitcases and carryon
luggage) UNLESS they are properly protected from short circuits. So when transporting
individual batteries, make sure that the battery terminals are protected and well insulated from
materials that could contact them and cause a short circuit.

Weak Battery Indicator

The upper left portion of the LCD screen will display a low battery symbol (

Figure 1

) when a

weak battery is detected. As the battery continues to weaken, the low battery indicator and the
detection mode will no longer display on the screen.

Operating Instructions
Measuring Length

1.) Move slide switch (E) to DISTANCE MEASUREMENT position (far right)
2.) Slide the on/off switch to the “ON” position, press “READ” button taking one 

measurement to activate the unit.

3.) Press the “FT/M” button to select feet / inch units or metric measurement units as shown

in 

Figure 2

.

4.) Press the “SET” button (for obtaining true wall to wall distance) to select measurement

from the front edge of the unit, back edge of the unit or at 90° to the unit see 

Figure 3

.

5.) Point the unit perpendicular to the target and and press the “READ” button located on

either side of the unit. Use the laser pointer to insure that the unit is pointed at the object

that you want to measure for distance.

6.) When the distance is out of the detection range (2 feet to 50 feet / 61cm to 15 meters)

the unit will beep and display “E” for error.

7.) When the distance is within the detection range, the unit will beep and display the 

distance for 15 seconds.

8.) Slide the on/off switch to the “OFF” position to turn the unit off.
9.) For “Continuous Measurement” operation, press and hold the “READ” button and walk

toward or away from the point being measured.

Adding, Subtracting and Multiplying Measurements

Adding

1.) After taking first measurement (or recalling measurement from memory by pressing the

“RCL” button), press the “+” button as shown in 

Figure 4

to add distances. Take the sec-

ond measurement then press the “=” button to get the total.

Subtracting

2.) After taking first measurement (or recalling measurement from memory by pressing the

“RCL” button), press the “-” button as shown in 

Figure 5 

to subtract distances. Take the

second measurement then press the “=” button to get the total.

Multiplying

3.) After taking first measurement (or recalling measurement from memory by pressing the

“RCL” button), press the “x” button as shown in 

Figure 6 

to multiply distances or obtain

the Area (Square Footage). Take the second measurement then press the “=” button to

get the total area or press “x” again and “=” to take a third measurement and calculate

Volume (Cubic Feet).

Notes:

• When using unit at a 90° angle be sure to fully lock the measurer into the 90° position as

shown in 

Figure 7. 

Not having the measurer at a full 90° will result in an inaccurate reading.

• For accuracy purposes, avoid moving after pressing the read button until the distance is

displayed.

• The measured object must have a flat hard surface and be in an open space void of any

obstacles in the measurement path in order to obtain accurate results.

• Distance detection may be sometimes affected by the environment. To insure a correct

reading repeat the detection until you get at least two of the same readings within three attempts.

• The LCD screen will go blank after 15 seconds of inactivity.
• The measurer cannot measure distance through glass.
• The laser is used to locate where the tool is pointed and is only “ON” when a measurement is

being taken.

Laser

DANGER: Laser Radiation, avoid direct eye exposure.

Scanning

Stud Mode

For stud sensing through up to 3/4 inches (19mm) thick drywall.

1.) Move slide switch (E) to STUD position (far left). Slide the on/off switch (F) to the “ON”

position. Hold unit straight up and down and place flat against wall as shown in 

Figure 8

.

Press in on either of the read buttons (D) and continue holding in button.

2.) The unit will beep once while it is calibrating and will display the stud symbol 

on the

LCD screen.

3.) Slide unit slowly, 

Figure 9

, across surface of wall without lifting or tilting. When a stud is

detected the LCD screen will begin to display a row of black boxes 

, slow down

and keep sliding until the beep sounds as shown in 

Figure 10

. Mark this spot at the 

middle of the unit. 

4.) Continue holding button in and scan beyond the marked spot until the row of black boxes

disappears. Without releasing button, reverse direction to locate the other edge of the

stud. When the unit beeps again mark the spot. Center of stud is between two marks.

Metal Mode

For metal sensing through up to 2 inches (50mm) thick drywall. 

1.) Move slide switch (E) to METAL position (middle left). Hold unit in air away from metal

objects. Slide the on/off switch (F) to the “ON” position. Scan both horizontally and 

vertically against wall as shown in 

Figure 11

. Press in on either of the read buttons (D)

and continue holding in button.

2.) The unit will beep once while it is calibrating and will display the metal symbol 

on the

LCD screen.

3.) Slide unit slowly, across surface of wall without lifting or tilting. When a metal object is

detected the LCD screen will begin to display a row of black boxes 

, slow down and

keep sliding until the LCD screen displays a full row of boxes and the beep sounds as

shown in 

Figure 10

. Mark this spot at the middle of the unit.

Note: Because metal pipes or objects can be oriented both vertically and 

horizontally behind a wall, you should scan both vertically and horizontally as

shown in Figure 11.

AC Wire Mode

For AC Wire sensing through up to 2 inches (50mm) thick drywall.

1.) Move slide switch (E) to the AC WIRE position (middle right). Hold unit in air away from

any electrical wiring. Slide the on/off switch (F) to the “ON” position.

2.) The unit will beep once while it is calibrating and will display the electrical symbol 

on

the LCD screen.

3.) Slide unit slowly, across surface of wall without lifting or tilting 

as shown in Figure 12

.

When an AC voltage is detected the LCD screen will begin to display a row of black

boxes 

, slow down and keep sliding until the LCD screen displays a full row of boxes

and the beep sounds. Mark this spot. 

The sensor detects AC voltage and will identify only “live” wires. If the unit is calibrated close

to AC wire, it may decrease AC wiring sensor sensitivity. Static charge may spread detection

12 inch (30.4cm) on both sides of wire. 

WARNING:

Occasionally, pipes and electrical wiring may not be detected by this

product. Observe caution when cutting or drilling into areas that may contain concealed

pipes or wiring. The sensor will not detect live wires inside metal pipe or metal conduit,

behind metallic wall covering, or behind some plywood or other dense materials. 

Use caution if area has plywood, thick wood backing behind drywall, or thicker than normal walls.

WARNING:

Always turn off the power when working near electrical wires,

electric shock may result.

Storage

Always store this product indoors, in a clean, dry area out of the reach of children.

Specifications:

Detecting distance:

Stud: 3/4 inches (19mm)
Metal: 2.0 inches (50mm)
AC Wire: 2.0 inches (50mm)
Distance: (2 feet ~ 50 feet) 61cm ~15M

Indicators:

Audio / LCD screen

Distance Measurement Accuracy: +/- 0.5% +/- 1digit @ 10 feet
Power consumption:

70mA

Power source:

9V

Temperature:

41°F(5°C) - 104°F(40°C)

Maintenance

Use only mild soap and damp cloth to clean the tool. Never let any liquid get inside the tool;
never immerse any part of the tool into a liquid.

IMPORTANT:

To assure product SAFETY and RELIABILITY, repairs, maintenance and

adjustment (other than those listed in this manual) should be performed by authorized service

centers or other qualified service organizations, always using identical replacement parts.

Accessories

Recommended accessories for use with your tool are available from your local dealer or

authorized service center. If you need assistance regarding accessories, please call:

1-800-54-HOW-TO (544-6986).

WARNING:

The use of any accessory not recommended for use with this tool could be

hazardous.

FCC Warning

This device complies with part 15 of the 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 undesirable
operation.

Service Information

All Black & Decker Service Centers are staffed with trained personnel to provide customers
with efficient and reliable power tool service. Whether you need technical advice, repair, or
genuine factory replacement parts, contact the Black & Decker location nearest you. To find
your local service location, refer to the yellow page directory under "Tools—Electric" or call: 

1-800-54-HOW TO. (544-6986)

Full Two-Year Home Use Warranty 

Black & Decker (U.S.) Inc. warrants this product for two years against any defects in material

or workmanship. The defective product will be replaced or repaired at no charge in either of

two ways.
The first, which will result in exchanges only, is to return the product to the retailer from

whom it was purchased (provided that the store is a participating retailer). Returns should be

made within the time period of the retailer’s policy for exchanges (usually 30 to 90 days after

the sale). Proof of purchase may be required. Please check with the retailer for their specific

return policy regarding returns that are beyond the time set for exchanges.
The second option is to take or send the product (prepaid) to a Black & Decker owned or

authorized Service Center for repair or replacement at our option. Proof of purchase may be

required. Black & Decker owned and authorized Service Centers are listed under "Tools-

Electric" in the yellow pages of the phone directory.
This warranty does not apply to accessories. This warranty gives you specific legal rights

and you may have other rights which vary from state to state. Should you have any

questions, contact the manager of your nearest Black & Decker Service Center. This product

is not intended for commercial use.

FREE WARNING LABEL REPLACEMENT

: If your warning labels become illegible or are

missing, call 1-800-544-6986 for a free replacement.

• Weak battery.
• Distance measurement

is less than 2 feet (0.6m)

or greater than 50 feet

(15m).
• Unit is not pointed

perpendicular to the

target.
• Objects or obstacles

could be in the

measurement path.

• Replace with fresh battery.
• Distance measured must be over
2 feet (0.6m) or under 50 feet
(15m).

• Point unit perpendicular to target.

• Move unit to an open space void

of any obstacles in the

measurement path.

• Distance measurement
is inaccurate or
inconsistent.

• Place a piece of cardboard in front

of surface. Measured object must

be a flat surface and be

perpendicular to the detector in

order to obtain an accurate result.
• Distance measured must be over 
2 feet (0.6m) or under 50 feet
(15m).

• “E” displayed on LCD
screen.

• Measured object does
not have a good
reflective surface.

• Distance measurement

is less than 2 feet (0.6m)

or greater than 50 feet

(15m).

Possible Cause

• Weak battery.
• Nothing to detect in that

area.
• Check mode. May

have been calibrated

over a stud. 

Solution

• Replace with fresh battery.
• Start again moving farther to either
side.

Problem

• LCD screen does not
illuminate

T

T

T

T

R

R

R

R

O

O

O

O

U

U

U

U

B

B

B

B

L

L

L

L

E

E

E

E

S

S

S

S

H

H

H

H

O

O

O

O

O

O

O

O

T

T

T

T

II

II

N

N

N

N

G

G

G

G

• Replace with fresh battery.
• If a switch controls an outlet, make
sure the it is ON for detection.

• You suspect electrical
wires, but do not detect
any.

• Weak battery.
• If wires are shielded

behind metallic wall

coverings, or in metal

conduit, the sensor will

not be able to detect

them.
• The wires may not be
“live”.
• Wires may be too deep
to sense.
• Use caution if area has

plywood, thick wood

backing behind drywall,

or thicker than normal

walls.

• Replace with fresh battery.
• Avoid calibrating over metal and
always calibrate in the air for best
sensitivity.

• Difficulty detecting
metal.

• Weak battery.
• Unit calibrated over

metal.
• Metal objects are too
deep.

See ‘Tools-Electric’

– Yellow Pages –

for Service & Sales

Imported by

Black & Decker (U.S.) Inc., 

701 E. Joppa Rd.

Towson, MD 21286 U.S.A.

Summary of Contents for Marksman BDSM400

Page 1: ...rent width Liquid Crystal Display First Aid Measures If liquid crystal comes in contact with your skin Wash area off completely with plenty of water Remove contaminated clothing If liquid crystal gets into your eye Flush the affected eye with clean water and then seek medical attention If liquid crystal is swallowed Flush your mouth thoroughly with water Drink large quantities of water and induce ...

Page 2: ... from any electrical wiring Slide the on off switch F to the ON position 2 The unit will beep once while it is calibrating and will display the electrical symbol on the LCD screen 3 Slide unit slowly across surface of wall without lifting or tilting as shown in Figure 12 When an AC voltage is detected the LCD screen will begin to display a row of black boxes slow down and keep sliding until the LC...

Page 3: ... À MOINS qu elles soient correctement protégées contre tout cour circuit Aussi lors du transport individuel de piles s assurer que les bornes sont bien protégées et isolées de tout matériau pouvant entrer en contact avec elles et causer un court circuit Voyant de charge des piles La partie supérieure gauche de l écran ACL affiche le symbole pile faible Fig 1 lorsqu une pile faible est détectée Alo...

Page 4: ... ou dissimulés derrière une paroi métallique ou un matériau épais tel que le contreplaqué Faire preuve d une grande prudence en présence de contreplaqué de renforts en bois épais placés derrière une cloison ou un mur plus épais que d habitude AVERTISSEMENT Toujours couper le courant électrique avant de travailler à proximité de fils électriques afin d éviter les risques de choc électrique Imported...

Page 5: ...ciones eléctricas pueden no ser detectadas por este producto Tenga cautela cuando corte o taladre en áreas que pudieran contener tuberías o instalaciones eléctricas ocultas El sensor no detectará los cables cargados que se encuentren dentro cañerías o ductos de metal detrás de revestimientos metálicos de las paredes o detrás de algunos materiales de contrachapado u otros materiales densos Tenga ca...

Page 6: ...a derechos legales específicos además de los cuales puede tener otros los cuales varían entre estados Si tuviese alguna pregunta contacte al gerente de su Centro de Servicio Black Decker más cercano Este producto no es para uso comercial SUSTITUCIÓN GRATUITA DE LAS ETIQUETAS DE ADVERTENCIA Si sus etiquetas de advertencia se vuelven ilegibles o se pierden llame al 1 800 544 6986 para conseguir repu...

Page 7: ......

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