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3.1.2
High voltages in hybrid vehicles and electric ve-
hicles as well as their high-voltage components
If high-voltage components or high-voltage
wires are inexpertly handled, there is a risk of
fatal injury from high voltages and the possi-
ble transmission of current through the body.
Deenergization is only to be performed by
a qualified electrician, a qualified electri-
cian for specific tasks (hybrid) or a power
systems engineer.
Work on vehicles with high-voltage com-
ponents is only ever to be performed in
a safe, deenergized condition by persons
with the minimum qualification "Trained to
perform electrical work".
Even after deactivating the high-voltage
vehicle electrical system, the high-voltage
battery may still be live.
Operating condition cannot be established
from any running noise, as the electric ma-
chine is silent when stationary.
In gear positions "P" and "N" the engine
or electric motor may start spontaneously
depending on the charge of the high-voltage
battery.
Safety measures:
Never open or damage high-voltage batteries.
On accident vehicles, never touch high-voltage com-
ponents or exposed high-voltage wires before deac-
tivating the high-voltage vehicle electrical system.
Avoid contact with any high-voltage components
and high-voltage wires (orange sheathing) when in
operation.
Secure against unauthorized renewed start-up
(e.g. by means of a padlock).
After each switch off of the high-voltage system,
observe a waiting time of 5 minutes (depending
on the manufacturer's instructions). Subsequently
ascertain the absence of voltage using a suitable
testing device.
Visually inspect the high-voltage components and
high-voltage wires for damage. The power systems
engineer responsible should always be immediate-
ly notified of any irregularities, doubts or defects
found.
$
High-voltage components must never exhibit
signs of external damage.
$
The insulation of the high-voltage wiring must be
intact and undamaged.
$
Watch out for any abnormal deformation of the
high-voltage wiring.
Robert Bosch GmbH
Safety instructions | SMT 300 | 23
3.2

Danger of burning

When working on a hot engine, there is a risk
of injury from burning if such components
as the exhaust gas manifold, the turbo-char-
ger, the Lambda sensor, etc. are touched or
if parts of the body come too close to them.
These components may be heated to tem-
peratures of several hundred degrees Celsius.
Depending on the duration of the exhaust
gas measurements, the sampling probe of the
exhaust gas measuring instrument may also
become extremely hot.
Safety measures::
Always wear protective clothing, e.g. gloves.
Allow the engine to cool down first. This also applies
to auxiliary heating systems.
Keep connecting cables well away from all hot parts.
Do not leave the engine running any longer than
necessary for the test or setting.
When working with SMT 300, the handle and
the surface of the SMT 300 pose a burn haz-
ard. SMT 300 can reach a temperature of up
to 60 °C when used for an extended period of
time.
Safety measures:
Wear protective gloves when working on the
SMT 300.
3.3
UltraTraceUV® smoke solution
UltraTraceUV® smoke solution may cause irri-
tation of the respiratory tract, skin and eyes
if inhaled, swallowed or come in contact with
the skin.
Safety measures:
Do not allow UltraTraceUV® smoke solution to be
handled by individuals who are not authorized to
work with the product.
If excessive inhalation of UltraTraceUV® smoke solu-
tion occurs, seek fresh air.
Do not swallow UltraTraceUV®. However, if it is swal-
lowed unintentionally, rinse your mouth thoroughly
and drink small amounts of water.
Do not allow UltraTraceUV® smoke solution to
come in contact with the skin. When working with
UltraTraceUV® smoke solution, wear nitrile rubber
safety gloves. However, if the solution nevertheless
comes in contact with the skin, remove clothing
soiled by the product, watch and jewelry, and wash
the affected areas of skin with copious amounts of
soap and water.
en
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1 689 989 261
2019-04-08

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