17
The DD 100 MEC is equipped with mecha-
nical,electronic and thermal overload protection
devices.
Mechanical
This protects the operator, motor and core bit if
the core bit suddenly sticks (safety clutch).
Electronic
If the machine is overloaded due to excessive
pressure being applied, the current is reduced so
that the core bit only rotates slowly. After re-
leasing pressure on the core bit, full current is
again supplied to the motor and the drilling speed
returns to normal.
Thermal
The motor is protected additionally against con-
tinuous overloading by a temperature sensor which
automatically reduces current input.The DD100 MEC
can be made to operate at normal speed by press-
ing the switch after the temperature of the motor
windings has dropped sufficiently. Cooling of
the motor windings can be assisted by allowing
the machine to run without load.The motor speed
necessary for effective cooling can be reached
more quickly by depressing the switch several
times.
Right of technical modifications reserved!
Overload protection
Overload indicator
If the overload indicator
➀
lights up, it is an indi-
cation that you are approaching the limit of
thermal overload. It is recommended that the
DD 100 MEC is operated in such a way that the
overload indicator lamp does not light up(if the
indicator remains on, the thermal motor protec-
tion will be activated).After the machine has been
allowed to cool, work can continue normally (cool-
ing at no-load speed approx. 20 seconds).
➀
different applications, with different accessories or poorly maintained, the vibration emis-
sion may differ. This may significantly increase the exposure level over the total working
period. An estimation of the level of exposure to vibration should also take into account the
times when the tool is switched off or when it is running but not actually doing the job. This
may significantly reduce the exposure level over the total working period. Identify addition-
al safety measures to protect the operator from the effects of vibration such as: maintain the
tool and the accessories, keep the hands warm, organisation of work patterns.
Noise and vibration information (measured in accordance with EN 60745):
Typically the A-weighted noise levels of the tool are:
– sound pressure level:
89 dB (A)
– sound power level:
100 dB (A)
For the given sound power level as per EN 60745, the tolerance is 3 dB.
Wear ear protection.
Triaxial vibration value (vibration vector sum) measured in accordance with EN 60745-2-1
Drilling into concrete, with water supply, (a
h, DD
):
5.0 m/s
2
Uncertainty (K) for triaxial vibration value:
1.5 m/s
2
Do not use this product in any way other than as directed by these operating instructions.
Before beginning work:
Please observe the enclosed safety precautions!
Printed: 07.07.2013 | Doc-Nr: PUB / 5069503 / 000 / 00
