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DUTY CYCLE & OVER HEAT
The letter 'X' stands for duty cycle, which is defined as the
proportion of the time that a machine can work
continuously within a certain time (10 minutes). The rated
duty cycle means the proportion of the time that a
machine can work continuously within 10 minutes when it
outputs the rated welding current.
The relation between the duty cycle 'X' and the output
welding current 'I' is shown as the right figure.
If the welding unit is overheating, the IGBT overheat
protection unit inside it will send an instruction to cut the
output current and the overheat pilot light will illuminate
on the front panel. At this time, the machine should be
removed from service and cool down for 15 minutes to
cool the welding unit. When operating the machine
again, the welding output current or the duty cycle should
be reduced.
WELDING POLARITY CONNECTIONS
Choosing either DC Electrode Positive (DCEP) or DC
Electrode Negative (DCEN) depends on the type of
welding, the metal properties and the gas or electrode
covering. Please consult a welding manual to determine
the best method.
The welding torch is hooked up to the positive output
(A) for DCEP and to the negative output (C) for DCEN.
The ground clamp cable is connected to the other
polarity outlet.
When used in AC mode, check the welding rod for the
appropriate polarity to use.
TIG SET UP
1. The ground clamp cable is connected to the welding unit's positive polarity output (A).
2. The welding torch is connected to the welding unit's negative polarity output (C).
3. The torch control cable is inserted into the aero socket (B).
4. A gas cylinder is attached to the shield gas input port (G) via a hose.
5. The welding torch hose is attached to the shield gas connector (D). The shield gas will flow to the welding torch
when the torch is activated.
6. On the Control Panel select the parameters for the type of welding application by referencing the control panel
section in this manual (see Fig. 1 and 2).
WELDING CURRENT ADJUSTMENT
Welding current range is 10 ~ 200A (TIG) or 10 ~ 170A (MMA). Pre-set the welding current amperage before use. The
amperage is displayed on the control panel (14).
14
SMART TIG AC/DC-200P Inverter Welding Machine
DC Electrode Positive
For technical questions call 1-800-665-8685
Fig. 10
DC Electrode Negative
Fig. 11
V4.1
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