4 Intended use
5
• 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. Test the instrument at a known voltage source.
• The instrument must not be used while its battery compartment is
open.
• Batteries must be checked before use and changed if necessary.
• Storage areas must be dry.
• If there is any battery leakage, the instrument must no longer be used
until it has been checked by our Customer Service.
• The battery acid (electrolyte) is highly alkaline and electrically
conductive. Risk of acid burn! If the battery acid comes into contact
with your skin or clothing, thoroughly rinse the areas affected
immediately with plenty of water. If battery acid gets into your eyes,
rinse them immediately with plenty of water and seek medical advice.
4Intended use
The instrument may only be used under the conditions and for the purpose
for which it was designed:
• testo 760-1 conforms to measurement category CAT III with a rated
voltage of 600 V to earth.
Measurement category CAT III is for use in electrical circuits in building
installation, e.g. distributors, circuit breakers, cabling, sockets,
switches, instruments for industrial use, permanently installed motors.
• testo 760-2 and testo 760-3 conform to measurement category CAT IV
with a rated voltage of 600 V to earth.
The CAT IV measurement category is used at the source of low
voltage installations, e.g. building connection, main fuse, and meter.
The instrument may only be used in the fields of application defined in the
instruction manual. Any application deviating from this is considered to be
improper and unchecked use and may result in accidents or instrument
damage. Any improper use will completely void any right to claims under
Testo’s guarantee and warranty.
The manufacturer is not responsible for damage to property or personal
injury caused by the following:
• Failure to observe the instruction manual
• Instrument modifications not approved by the manufacturer
• The use of spare parts not approved by the manufacturer
• Use under the influence of alcohol, drugs or medication
The instrument must not be used for the following purposes:
• In potentially explosive atmospheres: the instrument is not explosion-
proof!
• When there is rain or other precipitation: risk of electric shock!
