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First determine the proper electrode polarity for the elec-
trode to be used. Consult the electrode data for this
information. Then connect the output cables to the out-
put terminals of the machine for the selected polarity.
Shown here is the connection method for DC(+) welding.
(See Figure A.1)
Connect the electrode cable to the (+) terminal and the
work clamp to the (-) terminal. Insert the connector with
the key lining up with the keyway and rotate approxi-
mately 1/4 turn clockwise. Do not over tighten.
For DC(-) welding, switch the cable connections at the
machine so that the electrode cable is connected to (-)
and the work clamp is connected to (+).
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This machine does not include a TIG torch necessary for
TIG welding, but one may be purchased separately.
Refer to the accessories section for more information.
Most TIG welding is done with DC(-) polarity shown here.
If DC(+) polarity is necessary switch the cable connec-
tions at the machine. (See Figure A.2)
Connect the torch cable to the (-) terminal of the machine
and the work clamp to the (+) terminal. Insert the con-
nector with the key lining up with the keyway and rotate
approximately 1/4 turn clockwise. Do not over tighten.
Finally, connect the gas hose to the gas regulator on the
cylinder of gas to be used.
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• Scratch Start TIG
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The rated output of the Invertec® 100S is available
when connected to a 20A branch circuit. When con-
nected to a branch circuit with lower ampacity, lower
welding current and duty cycle must be used. An out-
put guide is provided below. The values are approxi-
mate and must be adjusted downward if the fuse or
circuit breaker trips off. Other loads on the circuit and
fuse/circuit breaker characteristics will affect the avail-
able output. Do not exceed these welding conditions:
(See Table A.1)
The Invertec® 100S is provided with a 120V cable,
6.6ft.(2m) in length, with a 15Amp 5-15P plug molded
onto the cord.
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Plug
Rating
15 Amp
15 Amp
Branch
Rating
15 Amp
20 Amp
20% Duty
Cycle
65A
80A
120V Input
Output Current
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10% Duty
Cycle
70A
90A
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A quick disconnect system using Twist-MateTM cable
plugs is used for the welding cable connections.
Refer to the following sections for more information on
connecting the machine for operation of stick welding
(MMA) or TIG welding.
• "<@6A6C2#B6086@0<;;20A Positive output
connector for the welding circuit.
• 24.A6C2#B6086@0<;;20A Negative output
connector for the welding circuit.
ELECTRIC SHOCK can kill.
• Keep the electrode holder and
cable insulation in good condition.
• Do not touch electrically live parts
or electrode with skin or wet cloth-
ing.
• Insulate yourself from work and ground.
• Turn the input line Switch on the Invertec® 100S
“off” before connecting or disconnecting output
cables or other equipment.
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