PROMAT ST 10 Instrucciones De Empleo página 17

● Fully-isolated users that prevent an effective ground
● Receptacles in recessed sockets/ differences in socket design
● Condition of the Tester and Batteries
Use caution with voltages above 30 V ac as a shock hazard may exist.
FOR USE BY COMPETENT PERSONS
Anyone using this instrument should be knowledgeable and trained about
the risks involved with measuring voltage, especially in an industrial set-
ting, and the importance of taking safety precautions and of testing the
instrument before and after using it to ensure that it is in good working
condition.
The single-pole phase testing is not appropriate to determine whether a
line is live or not. For this purpose, the double-pole voltage test is always
required.
Definition of measurement categories.
Measurement category II:
Measurement category II is applicable to test and measuring circuits con-
nected directly to utilization points (socket outlets and similar points) of
the low-voltage mains installation. Typical short-circuit current is < 10kA.
Measurement category III:
Measurement category III is applicable to test and measuring circuits
connected to the distribution part of the building's low-voltage mains in-
stallation. Typical short-circuit current is < 50kA.
Measurement category IV:
Measurement category IV is applicable to test and measuring circuits
connected at the source of the building's low-voltage mains installation.
Typical short-circuit current is >>50kA.
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