Observe Prior To Use; Safety Instructions - TESTO 770 Instruction Manual

3 Safety instructions

2 Observe prior to use!

• The instruction manual contains information and instructions which are
necessary for operating and using the instrument safely. Before using
the instrument, read the instruction manual carefully and comply with
all aspects of it. Keep this document to hand so that you can refer to it
when necessary. Forward this documentation to any subsequent users
of the instrument.
• If the manual is not followed, or if you fail to observe the warnings and
instructions, there is a risk of fatal injury to the user and damage to the
instrument.
3 Safety instructions
• The instrument may only be used by trained personnel. During all
operations, please observe the Employers' Liability Insurance
Association provisions for health and safety at work.
• In order to prevent electric shock, take safety precautions when
working with voltages greater than 120 V (60 V) DC or 50 V (25 V)
rms. AC. These values are the limit for contact voltages in accordance
with DIN VDE (values in brackets apply to restricted areas, for example
agricultural sectors).
• The measuring instrument may only be used with a maximum voltage
of 600 V.
• Measurements that are dangerously close to electrical installations
must only be carried out under the direction of a qualified electrician,
not by oneself.
• The instrument may only be touched at the designated grip areas, the
display elements must not be covered.
• If the safety of the operator can no longer be guaranteed, you must
decommission the instrument and ensure that it cannot be used
inadvertently. This applies if the instrument:
• has obvious indications of damage
- cracks on the housing
- defective test leads
- leaking batteries
• will no longer carry out the required measurements
• was stored for too long in unfavourable conditions
• was exposed to mechanical stresses during transport.
• Prevent the instrument from being heated due to exposure to direct
sunlight. This is the only way to ensure that the instrument functions
perfectly and has a long service life.
• If the instrument needs to be opened, this should only be carried out by
an expert. Before being opened, the instrument must be switched off
and isolated from all electrical circuits.
• Maintenance work that is not described in this documentation must
only be carried out by trained service technicians.
• If the instrument is modified in any way, operational safety can no
longer be guaranteed.
• Modifications or alterations to the instrument will result in the complete
invalidation of any warranty or guarantee claims against the
manufacturer.
• It is not permitted to use the instrument in an explosive environment.
• Before and after use, always check that the instrument is in peak
working order. To do this, test the instrument at a known current
source.
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