4 – Mastertig MLs™ 300 aCDC / 0743
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• Keep the torch cable and earthing cable as close to each other as possible throughout their
length. Straighten any loops in the cables. This minimises your exposure to harmful magnetic
fields, which may interfere with a pacemaker, for example.
• Do not wrap the cables around the body.
• In environments classified as dangerous, only use S-marked welding devices with a safe idle
voltage level. These work environments include, for example, humid, hot or small spaces
where the user may be directly exposed to the surrounding conductive pieces.
Spatter and fire safety
• Welding is always classified as hot work, so pay attention to fire safety regulations during
welding and after it.
• Remember that fire can break out from sparks even several hours after the welding work is
completed.
• Protect the environment from welding spatter. Remove flammable materials, such as
flammable fluids, from the welding vicinity and supply the welding site with adequate fire
fighting equipment.
• In special welding jobs, be prepared for hazards such as fire or explosion when welding
container-type work pieces.
• Never direct the spark spray or cutting spray of a grinder toward the welding machine or
flammable materials.
• Beware of hot objects or spatter falling on the machine when working above the machine.
• Welding in flammable or explosive sites is absolutely forbidden.
General electric safety
• Only connect the welding machine to an earthed electric network.
• Note the recommended mains fuse size.
• Do not take the welding machine inside a container, vehicle or similar work piece.
• Do not place the welding machine on a wet surface and do not work on a wet surface.
• Do not allow the mains cable to be directly exposed to water.
• Ensure cables or welding torches are not squashed by heavy objects and that they are not
exposed to sharp edges or a hot work piece.
• Make sure that faulty and damaged welding torches are changed immediately as they can
be lethal and may cause electrocution or fire.
• Remember that the cable, plugs and other electric devices may be installed or replaced only
by an electrical contractor or engineer authorised to perform such operations.
• Turn off the welding machine when it is not in use.
Welding power circuit
• Insulate yourself from the welding circuit by using dry and undamaged protective
clothing.
• Never touch the work piece and welding rod, welding wire, welding electrode or contact tip
at the same time.
• Do not put the welding torch or ground cable on the welding machine or other electric
equipment.
Welding fumes
• Ensure proper ventilation and avoid inhaling the fumes.
• Ensure sufficient supply of fresh air, particularly in closed spaces. You can also ensure the
supply of clean and sufficient breathing air by using a fresh-air mask.
• Take extra precautions when working on metals or surface-treated materials containing lead,
cadmium, zinc, mercury or beryllium.
