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13818

COMBINED

METAL, VOLTAGE

& STUD DETECTOR

Warning: Shielded wires or live wires in metal conduits, casings, metal walls or thick, dense walls 

will not be detected, and the presence of foil backed plasterboard or insulation materials.

Use caution when nailing, cutting or drilling in walls, ceilings and floors that may contain wiring or 

pipes near the surface.
When working near AC electrical wires, always turn off the wires’ power.

Caution should always be used when nailing, sawing or drilling into walls, floors and ceilings that 

may contain cable or wire.

(1)

  Stud detection face.

(2)

  Voltage detection face.

(3)

  Red LED indicator.

(4)

  Green LED indicator.

(5)

  Sensitivity dial (stud detector).

(6)

  Selector switch.

(7)

  Sensitivity dial (AC voltage/ metal 

detector).

(8)

  Green “ON” LED.

(9)

  Red LED indicator.

(10)

  Battery compartment.

(11)

  Trimmer for stud detector.

(12)

  Trimmer for voltage/metal detector.

(13)

 Buzzer.

(14)

  AC voltage detection adjuster 

(Factory adjustment only. Do not 

tamper with this setting).

2.1  CONNECTING THE BATTERY

Unclip battery compartment cover on the back of the unit, and 

connect a new 9V-PP3 battery. Replace cover and securely 

snap in place. The unit is now ready for use.

1.1 IDENTIFICATION

3.2  WOOD FRAME DETECTION

To locate vertical batons or wall studs, refer to the following 

procedures:
Place the unit on the wall with the detection face marked “STUD” 

leaning against the wall.
Turn the dial 

(5)

 fully downwards.

Move the selector switch to STUD DETECTOR position.
Turn the dial 

(5)

 upwards until the Red LED and Buzzer come on.

Reverse the dial 

(5)

 gently until the Green LED comes on and the 

Buzzer sound disappears.
If the unit can not be set it needs to be adjusted. For details refer to 

“UNIT ADJUSTMENT”.
Move the unit horizontally across the wall. Make sure that the 

detection face marked with “STUD” is placed flat against the wall, 

otherwise the Green LED will go out and calibration procedures need 

to be repeated from the beginning.
When the edge of a batten or wall stud is under the groove of the 

unit, the Red LED will come on and Buzzer will sound.

Mark this position on the wall.
Resume the movement of the unit. When the Green LED comes on 

and Buzzer ceases, mark this position too.
These marks indicate the edges of the batten or wall stud. The middle 

point between two marks is the centre of the batten or wall stud.
Locating horizontal battens or stud braces, refer to the following 

procedures.
Place the unit horizontally against the wall.
Use the same method of locating vertical battens or wall studs to 

detect horizontal battens or stud braces.

Note: The stud detection can be carried out normally on wall papered 

walls. However it may not function on some types of foil backed or 

metallic fabric surfaces.
If by chance the unit is placed over the wall batten or stud to process 

calibration, the Green LED may go off and Buzzer may cease when 

the edge of batten or wall stud is under the groove of the unit, it 

means that the detection may fail.
Before detecting, calibrate the unit with the required detection face 

against the wall along which you want to detect. It is advisable to take 

several readings along the batten or stud because a nail may change 

the apparent centre position.
Frequent re-calibrations can help to avoid any false readings.
We always recommend carrying out metal/voltage detection to ensure 

the detected batten or wood stud is not a pipe or cable. Please note 

that some small securing screws or nails may be detected.
If there are two studs existing adjacently, the unit may not work 

correctly.

3.3  MAXIMIZING ACCURACY

The sensitivity of the unit can be pin-pointed at the exact place of 

pipes, cables, battens or studs. To do this sweep the unit across the 

area in question, with the red light and buzzer sounding. After each 

sweep, gradually adjust the knob until the red light and buzzer are no 

longer activated. Gently reverse the knob before each subsequent 

sweep until the red light and buzzer come on at the location of hidden 

pipes/cables or battens or studs.

3.4  UNIT ADJUSTMENT

A small screwdriver is provided for this, located under the battery 

compartment cover. Don’t lose it.

Warning: Any attempt to adjust the calibration must be made 

with the utmost care. Once the unit has been adjusted there is 

no way to return it to the factory calibrated settings.

The adjustment mechanism is extremely sensitive and only 

requires a very small amount of rotation. If large adjustments are 

made it is very difficult to accurately recalibrate the unit.

Warranty claims will not be accepted if the unit has been badly 

adjusted by the user.

Metal/AC Voltage Detection Adjustment

Turn the Metal/Voltage sensitivity dial by ½ turn.
Place Selector Switch to AC VOLTAGE/METAL DETECTOR position.
Turn the trimmer 

(12)

 by using the small screwdriver.

If the Green LED is on, slowly turn the trimmer CLOCKWISE until the 

Red LED and Buzzer just come on. Slowly turn back the trimmer until 

the Red LED just goes off and the Buzzer ceases. Now the unit is 

correctly adjusted.
If the Red LED and Buzzer come on, slowly turn the trimmer 

(10)

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(11)

(12)

(13)

(14)

ANTI-CLOCKWISE until the Red LED just goes off and the Buzzer 

ceases. Now the unit is correctly adjusted.

Stud Detection Adjustment

Turn the STUD sensitivity dial by ½ turn.
Move Selector Switch to STUD DETECTOR position.
Hold the unit with “STUD” face against the wall.
Adjust the trimmer 

(11)

 for STUD DETECTOR.

If the green light is on, slowly turn the trimmer ANTI-CLOCKWISE 

until the Red light and Buzzer just come on. Slowly turn back the 

trimmer until the Red LED and Buzzer just turn off and the Green LED 

just turns on. Now the unit is correctly adjusted.
If the Red LED and Buzzer come on, slowly turn the trimmer 

CLOCKWISE until the Red LED and the Buzzer just turn off and the 

Green LED just turns on. Now the unit is correctly adjusted.

INSTRUCTIONS 

1.  TECHNICAL DESCRIPTION

2. ASSEMBLY

Summary of Contents for 13818

Page 1: ... may contain cable or wire 1 Stud detection face 2 Voltage detection face 3 Red LED indicator 4 Green LED indicator 5 Sensitivity dial stud detector 6 Selector switch 7 Sensitivity dial AC voltage metal detector 8 Green ON LED 9 Red LED indicator 10 Battery compartment 11 Trimmer for stud detector 12 Trimmer for voltage metal detector 13 Buzzer 14 AC voltage detection adjuster Factory adjustment o...

Page 2: ...nd on the wall may cancel the effect Rubbing or banging the unit on the wall may generate static electricity and cause a false reading Leakage Current Because of the extremely small current required to cause a reading on the unit an apparent false reading may be seen in some situations e g a conductor with poor insulation touching a damp wall the unit will show a voltage on the wall In this situat...

Page 3: ...e are two studs existing adjacently the unit may not work correctly 3 3 MAXIMIZING ACCURACY The sensitivity of the unit can be pin pointed at the exact place of pipes cables battens or studs To do this sweep the unit across the area in question with the red light and buzzer sounding After each sweep gradually adjust the knob until the red light and buzzer are no longer activated Gently reverse the...

Page 4: ...materials etc Caution Remember to switch off the unit when not in use move selector switch to the middle If you don t use the unit for a long time please remove the battery Wood Test Compound wood thickness 10mm Metal Test Diameter 20mm Iron pipe depth 25mm max AC Voltage test AC 220V Electric wire depth 25mm max Ambient condition 20 C to 60 C below 80 RH Battery PP3 9V Draper Tools Limited Hursle...

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