lotos tig200acdcp 200a ac/dc pulse aluminum tig/stick arc welder with digital control, igbt square wave inverter, 110/220v dual voltage, 10 settings savings, 0.5~200hz pulse frequency, brown lotos <b>about lotos technology</b> <p>our headquarters is located in sunnyvale, california, usa. lotos technology supplies quality welding and cutting tools to small businesses and do-it-yourself (diy) buyers. since 2007, our products have gained recognition as a reputable source for affordable industrial and consumer based portable plasma cutters and welders. we are proud of our product, quality, and after-sale service. we offer quality welding and cutting tools to small businesses and diy buyers. our tools will help you with your diy projects to "cut it, weld it, and build it" to get the job done!</p> <b>buy with confidence:</b><br> <p>we offer a 30-day refund and 1-year warranty, please submit warranty registration form on our website. </p> <br> <b>lotos tig200acdcp digital control ac/dc pulse tig welder</b><br> <b>tig parameters</b><br> <ul> <li>pre-flow 0.1-1s</li> <li>start amps 5-200a</li> <li>up slope 0-15s</li> <li>peak amps 5-200a</li> <li>peak on time 10-90%</li> <li>pulse frequency 0.5-200hz</li> <li>base amps 5-95%</li> <li>ac frequency 40-200hz</li> <li>ac balance 30-70%</li> <li>down slope 0-25s</li> <li>end amps 5-200a</li> <li>post flow 0-15s</li> </ul> <b>mma parameters</b><br> <ul><li>mma current range is 20-180a.</li> <li>hot start display shows from off-10,the actual corresponding current is 0-50a. </li> <li>arc force display shows from off-10, the actual coresponiding current is 0-100a. </li> <li>vrd voltage is 13-23v. to turn vrd on and off, adjust the mma current to 108,then press and</li> <li>hold the 2t/4t button for 5s.</li></ul> <b>tmma operation</b><br> if the electrode touches the workpiece over 2s, the welding current will drop automatically to 0 to protect the electrode <b>prevent arc-break function</b><br> tig operation – avoid arc-break. if arc-break occurs the hf will keep the arc stable