Clarke CDM70 Installation and operation manual

3 - 1 SUPER DETECTOR WITH LCD3 - 1 SUPER DETECTOR WITH LCD
OPERATING & MAINTENANCE
INSTRUCTIONS 1207
MODEL No: CDM70
Part No: 4500140

2
INTRODUCTION
Thank you for purchasing your new CLARKE 3 - 1 SUPER
DETECTOR WITH LCD. Before use, please read this instruction
manual thoroughly and follow all directions carefully.
The CLARKE 3 - 1 SUPER DETECTOR WITH LCD is ideal for DIY
and Trade use.
GUARANTEE
• This product is guaranteed against manufacturing faults
for a period of 12 months from the date of purchase.
• Keep your receipt as proof of purchase.
• This guarantee is invalid if the product is found to have
been abused or tampered with in any way, or not used
for the purpose for which it is intended. The reason for
return must be clearly stated.
• This guarantee does not affect your statutory rights.
FEATURES
• Detects Metal, Studding and AC Voltages.
• Visual and Audible Warning
• Low Power Consumption
• Easy To Use

3
PARTS IDENTIFICATION
Inserting the battery
1. Remove the battery door on the rear of the unit.
2. Connect a 9V PP3 battery to the battery clip.
3. Place the battery into the compartment.
4. Replace the battery door.
Scan mode
selector
Mode
Indicator
Test Button
LCD scale
Groove

4
AC VOLTAGE DETECTION
1. Press and hold the TEST button until an icon is shown on
the LCD.
2. Repeatedly press the SELECT button until is
displayed.
Calibration
3. Hold the unit in the air away from any metal objects.
4. Press and hold the TEST button.
• The unit will beep twice when calibration is complete.
Do not release the TEST button.
Using
5. Keep holding the TEST button and place the unit on the
wall, slowly move the unit sideways across the wall.
• When the centre bar on the LCD lights up and the
buzzer sounds, mark the point by placing a pencil mark
in the grove on top of the unit.
6. Carry on moving the unit in the same direction until the
centre bar on the LCD goes out and then reverse
direction.
• Once again, mark the point at which the buzzer sounds
by placing a pencil mark in the grove on top of the unit.
• The centre of the live wire is located mid way between
the two pencil marks.

5
AC VOLTAGE DETECTION
Notes:
• Some walls containing metal fibres (used in fireproofing)
will cause the detector to register a voltage over a
wider area.
• Rubbing or banging the wall may generate static
electricity, causing a false positive reading.
• Touching a damp wall being tested may also cause a
false reading.
• The unit will not detect wire inside metal shielding or
trunking.

6
METAL DETECTION
1. Press and hold the TEST button until an icon is shown on
the LCD.
2. Repeatedly press the SELECT button until is
displayed.
Calibration
3. Hold the unit in the air away from any metal objects,
4. Press and hold the TEST button.
• The unit will beep twice when calibration is complete.
Do not release the TEST button.
Using
5. Keep holding the TEST button and place the unit on the
wall, slowly move the unit sideways across the wall.
• When the centre bar on the LCD lights up and the
buzzer sounds, mark the point by placing a pencil mark
in the grove on top of the unit.
6. Carry on moving the unit in the same direction until the
centre bar on the LCD goes out and then reverse
direction.
• Once again, mark the point at which the buzzer sounds
by placing a pencil mark in the grove on top of the unit.
• The centre of the metal object is located mid way
between the two pencil marks.

7
METAL DETECTION
Notes:
• Wearing rings or other hand jewellery may cause a false
reading.

8
STUD DETECTION
1. Press and hold the TEST button until an icon is shown on
the LCD.
2. Repeatedly press the SELECT button until is
displayed.
Calibration
3. Place the unit against the wall, press and hold the TEST
button.
• The unit will beep twice when calibration is complete.
Do not release the TEST button.
Using
4. Keep holding the TEST button and slowly move the unit
sideways across the wall.
• When the centre bar on the LCD lights up and the
buzzer sounds, mark the point by placing a pencil mark
in the grove on top of the unit.
5. Carry on moving the unit in the same direction until the
centre bar on the LCD goes out and then reverse
direction.
• Once again, mark the point at which the buzzer sounds
by placing a pencil mark in the grove on top of the unit.
• The middle of the studding is located mid way between
the two pencil marks.
Always check that the “STUDDING” that you
have detected is not a metal pipe.

9
STUD DETECTION
Notes:
• You can use the detector on wallpaper, however it may
not be effective on some types of foil backed
wallpapers.
• If the unit is placed over studding during the calibration,
the unit will not work, simply re-calibrate the unit 150 mm
away from the last place.
• The surface of the wall should be dry and flat.
• Always keep your free hand away from the wall during
detection.
• If you release the test button at any time during
detection, you will need to carry out the calibration
procedure again.
• Knots in wood can cause false readings to occur.
• Normally, studding is placed at intervals of 40 - 60 cm.

10
TIPS
• Re-calibrate the unit frequently to avoid inaccurate
readings.
• Take several readings vertically above, below, to the left
and right to confirm the reading.
Detection Depths
Iron Pipe (25 mm) ............................................... 30 mm
Studding (30 x 30 mm) ...................................... 18 mm
AC Voltage (90-250V @50/60 Hz) .................... 50 mm
Detection depth can vary due to moisture content
and texture of the wall, paint etc.