Matco Tools MM200 LCD Operator's Manual page 6

 Connect the work cable to the work as close to the welding area as practical. Work cables connected to the
building framework or other locations away from the welding area increase the possibility of the welding current
passing through lifting chains, crane cables or other alternate circuits. This can create fire hazards or overheat
lifting chains or cables until they fail.
 Use only compressed gas cylinders containing the correct shielding gas for the process used and properly
operating regulators designed for the gas and pressure used. All hoses, fittings, etc. should be suitable for the
application and maintained in good condition.
 Always keep cylinders in an upright position securely chained to an undercarriage or fixed support.
 Cylinders should be located:
Away from areas where they may be struck or subjected to physical damage.
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A safe distance from arc welding or cutting operations and any other source of heat, sparks, or flame.
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 Never allow the electrode or any other electrically "hot" parts to touch a cylinder.
 Keep your head and face away from the cylinder valve outlet when opening the cylinder valve.
 Valve protection caps should always be in place and hand tight except when the cylinder is in use or
connected for use.
§1.3 Knowledge of Electric and Magnetic Fields
HSW SERIES arc welding machine uses Mix gas as shielded gas to realize gas shielded welding, active
gas（Ar+O
、Ar+CO
2
to realize MIG welding.
HSW SERIES arc welding machine has automatic protection functions with intelligent to over-voltage, over-
current and over-heat. If any one of the above problems happens, the alarm lamp on automatically to protect.
HSW SERIES Features:
1. Digital control system, real-time display the welding parameters;
2. High performance multifunction power source (MMA/MIG/MAG);
3. Waveform control, stable welding arc with IGBT technology, low power dissipation;
HSW SERIES arc welding machine is suitable for all positions welding for various plates made of stainless
steel, carbon steel, alloyed steel, copper, titanium, etc..
Rotating parts may be dangerous.
） as shielded gas to realize MAG welding and inactive gas（Ar）as shielded gas
2
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