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1.15. Etiqueta de advertencia
The device with a warning label. Do not remove, destroy or cover this label. These warnings are
intended to avoid incorrect device operations that could result in serious personal injury or property
damage.
2. GENERAL INFORMATION
SWA2850 series adopt the latest Pulse Width Modulation (PWM) technology and the Insulated Gate
Bipolar Transistor (IGBT) power modules. It uses switching frequencies in the 20KHz-50KHz ranges so
as to replace the traditional line-frequency transformer type welding machines. Thus, machines are
characterized with portability, small size, lightweight, low energy consumption and noise, etc.
Stick series of welding machines has excellent performance: constant current output makes welding
arc more stable; fast dynamic response speed reduces the impact from the arc length uctuation to
the current; accurate stepless current adjustment and pre-setting function. There are also some
automatic protection functions for under voltage, over current, over heat, etc. inside the welder, when
the problems listed before occurred, the alarm light on the front panel is on and at the same time the
output current will be cut o . It can self-protect, prolong the usefull life, greatly improved the reliability
and practicality of the welding machine.
For SWA2850 series welding current, arc force and hot start can be adjusted by the adjustment knob,
which can satisfy with several kinds of welding technologies. They can also realize high quality
welding especially for using basic electrode, acid electrode and cellulose electrode. When using
cellulose electrode, they can also realize downward welding for butt joint in all position.
SWA2850 series can also realize TIG operation. While MMA operation, if the electrode touches
workpiece over two seconds, the welding current will drop to the minimum current automatically to
protect the electrode. While TIG operation, the minimum current will be outputted rstly until the arc
is ignited by lifting method, the output current will rise to the preset value, which can protect the
electrode.
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