TESTO 770 User Manual

3 Safety instructions
4
2 Observe prior to use!
• The instrucon manual contains informaon and instrucons which are
necessary for operang and using the instrument safely. Before using the
instrument, read the instrucon 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 documentaon to any subsequent users of the instrument.
• If the manual is not followed, or if you fail to observe the warnings and
instrucons, there is a risk of fatal injury to the user and damage to the
instrument.
3 Safety instrucons
• The instrument may only be used by trained personnel. Please observe the
Employers' Liability Insurance Associaon provisions for health and safety at
work.
• Before handling any wires or components, you must rst ensure that all
power has been shut o to the circuit. It is also recommended to recheck the
wires or components for power using a voltage tester.
• According to the descripon of DIN VDE 0104, this instrument is not
approved for determining the absence of voltage.
• In order to prevent electrical shock, take safety precauons when working
with voltages greater 60 V DC or 30 V AC. Use personal safety equipment
such as approved rubber gloves, face protecon and ame-resistant clothing.
• Measure a known voltage rst to make sure the instrument operates
correctly.
• The measuring instrument may only be used with a maximum voltage of
600 V (testo 770-1/-2/-3 (0590 7703)) and 1000 V (testo 770-3 (0590 3770)).
• Measurements that are dangerously close to electrical installaons must only
be carried out under the direcon of a qualied electrician.
• The instrument may only be touched at the designated grip areas, the display
elements must not be covered.
• Always ensure that your measuring instrument is in proper working order to
maintain operang safety. Decommission the instrument if the following
issues apply:
• has obvious indicaons of damage
- cracks on the housing
- defecve test leads
- leaking baeries
• will no longer carry out the required measurements
• was stored for too long in unfavourable condions
• was exposed to mechanical stresses during transport.
• Do not use during electrical storms or in wet weather.

TESTO 770 Specifications

General

Brand	TESTO
Model	770
Category	Measuring Instruments
Language	English