Testboy TB 65 Manual De Instrucciones página 30

Operation
| In order to avoid risk of electric shock, you must observe the
specified precautions when working with voltages greater than
120 V (60 V) DC or 50 V (25 V) eff AC. These values represent
the limits of safe-to-touch voltages in accordance with DIN VDE.
(Values given in brackets apply to medical or agricultural areas,
for example)
| Before taking each measurement, ensure that the test lead and
the test instrument are in perfect working order
| The test leads and test probes must only be handled using the
grips provided. Avoid touching the test probes under any
circumstances.
The test instrument must only be used for the measuring
ranges specified.
According to the standard EN 61010-1, the following measurement
categories are defined:
Measurement category CAT II
Measurements on circuits that are directly electrically connected to
the network, via plugs in the home, office and laboratory.
Measurement category CAT III
Measurements on building installations: fixed consumer units,
distributor connection, equipment fitted permanently to the
distributor
Measurement category CAT IV
Measurements at the source of the low voltage installation: meters,
primary surge protection, mains connection.
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Testboy TB 65