REHM FOCUS.ARC P 250, Operating Instructions Manual

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Introduction
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1.2.1 The principle of the inert gas metal welding process
With the inert gas metal welding process an electric arc burns between a melting
wire electrode and the workpiece. Argon, carbon dioxide (CO2) or a mixture of these
or other inert gasses are used.
The positive pole usually flows from the current contact tips to the wire electrode and
the negative pole is connected to the workpiece. An electric arc forms between the
wire electrode and the workpiece that melts both the wire electrode and the
workpiece. The wire electrode is therefore the conductor for the arc and weld filler
material.
The wire electrode and the weld pool are protected against the influence of ambient
air by the inert gas, which flows continuously from the inert gas nozzle that is
arranged concentrically around the electrode.
1.2.2 Intended use
FOCUS.ARC P welding systems may only be used for MIG/MAG welding.
REHM welding units are designed for welding various different metallic materials
such as unalloyed and alloyed steels, stainless steels, aluminium and CuSi3.
Please also observe the special rules that apply to your applications.
REHM welding machines are designed for use in both hand-held and machine-
guided operation.
REHM welding machines are, except when this is expressly stated in writing by
REHM, only for sale to commercial / industrial users and are only intended to be
used by commercial / industrial users. The machines may only be operated by
persons who trained in the use and maintenance of welding equipment.
Welding power sources may not be installed in areas with increased electrical risk.
This manual contains rules and guidelines for the intended use of your system. Only
compliance with these guidelines shall be considered as proper use. Risks and
damages incurred due to any other use is the responsibility of the operator. Use
under special requirements may necessitate the observance of particular
regulations.
If in doubt, ask your competent safety officer or contact the REHM customer service
department.
The special instructions listed in the supplier documentation for intended use must
be observed.
National regulations also apply without restriction to the operation of the system.
Welding power sources may not be used to defrost pipes.
Intended use also includes compliance with the prescribed assembly, disassembly
and reassembly, commissioning, use, maintenance and disposal measures. Please
pay particular attention to the information in Section 2 Safety instructions and
Section 15.5 Proper disposal.
The system may only be operated under the aforementioned conditions. Any other
use is considered unintended use. The consequences of unintended use rests with
the operator. Welding power sources may not be used to defrost pipes.