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Eastwood Technical Assistance: 800.343.9353 >> [email protected]
POLARITY SELECTION
The Eastwood MP140i can weld in both Direct Current Electrode Positive (DCEP) and Direct Current Electrode Negative (DCEN). The electrode, or rod, when
welding in DCEP is positive and the grounded surface is negative. This polarity is used with electrodes that specify it and is usually the most commonly used
polarity when ARC welding for general purpose use. The electrode when welding in DCEN is negative and the grounded surface is positive. This polarity is used
with electrodes that require using this polarity and is usually used for building up heavy deposits of material with less penetration.
To use the Eastwood MP140i in DCEP:
• Locate the Ground Clamp with Cable and connect the plug on the cable end to the Ground Cable Connector (–) on the Welder. To connect the plug line up
the key on the plug with the keyway on the socket of the Welder, insert the plug and twist until it is tight.
• Locate the Electrode Holder with Cable and connect the plug on the cable end to the Electrode Holder Connector (+) on the Welder. To connect the plug
line up the key on the plug with the keyway of the socket on the Welder, insert the plug and twist until it is tight.
To use the Eastwood MP140i in DCEN:
• Locate the Ground Clamp with Cable and connect the plug on the cable end to the Positive Connector (+) on the Welder. To connect the plug line up the
key on the plug with the keyway on the socket of the Welder, insert the plug and twist until it is tight.
• Locate the Electrode Holder with Cable and connect the plug on the cable end to the Negative Connector (–) on the Welder. To connect the plug line up the
key on the plug with the keyway on the socket of the Welder, insert the plug and twist until it is tight.
ELECTRIC SHOCK CAN CAUSE INJURY OR DEATH!
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Improper use of an electric Welder can cause electric shock, injury and death! Read all precautions described in the Welder
Manual to reduce the possibility of electric shock.
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Disconnect Welder from power supply before assembly, disassembly or maintenance of the torch, contact tip and when installing
or removing nozzles.
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Always wear dry, protective clothing and leather welding gloves and insulated footwear. Use suitable clothing made from durable
flame-resistant material to protect your skin.
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Always operate the Welder in a clean, dry, well ventilated area. Do not operate the Welder in humid, wet, rainy or poorly ventilated
areas.
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The electrode and work (or ground) circuits are electrically “hot” when the Welder is on. Do not allow these “hot” parts to come
in contact with your bare skin or wet clothing.
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Separate yourself from the welding circuit by using insulating mats to prevent contact from the work surface.
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Be sure that the work piece is properly supported and grounded prior to beginning an electric welding operation.
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Always attach the ground clamp to the piece to be welded and as close to the weld area as possible. This will give the least
resistance and best weld.
WELDING SPARKS CAN CAUSE FIRE OR EXPLOSION!
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Electric welding produces sparks which can be discharged considerable distances at high velocity igniting flammable or
exploding vapors and materials.
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Do not operate electric arc Welder in areas where flammable or explosive vapors are present.
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Do not use near combustible surfaces. Remove all flammable items within 35 feet of the welding area.
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Always keep a fire extinguisher nearby while welding.
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Use welding blankets to protect painted and or flammable surfaces; rubber weather-stripping, dash boards, engines, etc.
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If other persons or pets are in the area of welding, use welding screens to protect bystanders from sparks.
ELECTROMAGNETIC FIELDS CAN BE A HEALTH HAZARD!
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The electromagnetic field that is generated during arc welding may interfere with various electrical and electronic devices such
as cardiac pacemakers. Anyone using such devices should consult with their physician prior to performing any electric welding
operations.
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Exposure to electromagnetic fields while welding may have other health effects which are not known.
