Bosch PMD 7 Original Instructions Manual page 25

Cause
Signal LED 2 flashes red over a large measuring area on the wall
(warning of "live" cables).
Improper grounding of
the wall
"Live" cable is not found.
No/atypical voltage on
the cable
Cable is located too
deep.
Cable runs in
grounded metal pipe.
Measuring tool is not
grounded.
Shielding building
material or humidity
too low/too high
Metal object is not located.
Metal object is located
too deep.
Metal object is too
small.
Uncoordinated flashing in colours green, yellow, red
Interference caused
by electric or magnetic
fields
* Therefore, please also observe other information sources (e.g. construction plans)
before drilling, sawing or routing into walls, ceilings or floors.
Bosch Power Tools
Corrective Measure
With your free hand, touch the wall at a distance
of 20–30 cm from the measuring tool to ground
the wall.
Add voltage to the cable, for example by turning
on light switches assigned to it. The detection of
cables with AC voltages outside of the range
110–240 V, 50–60 Hz is not reliably possible.*
The scanning depth is dependent on the building
material and may be less than the maximum
scanning depth.*
Use the measuring tool to locate the metal pipe.
Hold the measuring tool firmly without gloves.
Do not stand on insulating ladders or scaffolding.
Do not wear insulating footwear.
Detection will not be accurate in the presence of
metallic building materials or building materials
that are too dry or too damp (e.g. if the humidity
is too low or too high).*
The scanning depth is dependent on the building
material and may be less than the maximum
scanning depth.*
The scanning depth is dependent on the building
material and may be less than the maximum
scanning depth.*
Keep your distance from devices emitting strong
electric or magnetic fields (e.g. computers,
switch mode power supplies).
English | 25
2 609 141 285 | (7.7.15)