1. preFaCe1.1 generalCongratulations on your choice of the FastMig™ KM-series power source. Reliable and durable,Kemppi products are affordable to maintain, and they increase your work productivity.This user manual contains important information on the use, maintenance, and safety ofyour Kemppi product. The technical specifications of the device can be found at the end ofthe manual. Please read the manual carefully before using the equipment for the first time.For your safety and that of your working environment, pay particular attention to the safetyinstructions in the manual.For more information on Kemppi products, contact Kemppi Oy, consult an authorised Kemppidealer, or visit the Kemppi Web site at www.kemppi.com.The specifications presented in this manual are subject to change without prior notice.important notesItems in the manual that require particular attention in order to minimise damage andpersonal harm are indicated with the ’NOTE!’ notation. Read these sections carefully andfollow their instructions. Please also read the safety instructions in this manual and respectthem.1.2 saFety instruCtiOnsKemppi welding devices conform to international safety standards. Safety is an importantissue in equipment design and manufacturing. Therefore, Kemppi welding solutions areunparalleled in safety. There are, however, always certain hazards involved in using weldingequipment. Therefore, to ensure your personal safety and the safety of your workingenvironment, carefully read the safety instructions below and respect them.use of personal protective equipment• The arc and its reflecting radiation damage unprotected eyes. Shield your eyes andface appropriately before you start welding or observe welding. Also note the differentrequirements for the darkness of the screen in the mask as the welding current changes.• The arc radiation and spatters burn unprotected skin. Always wear protective gloves,clothing and footwear when welding.• Always wear hearing protection if the ambient noise level exceeds the allowable limit(e.g., 85 dB(A)).general operating safety• Exercise caution when handling parts heated in welding. For example, the tip of thewelding torch, the end of the welding rod and the work piece will heat to a burningtemperature.• Never carry the device or suspend it by the carrying strap during welding.• Do not expose the machine to high temperatures, as heat may cause damage to themachine.• Keep the torch cable and earth return cable as close to each other as possible throughouttheir length. Straighten any loops in the cables. This minimises your exposure to harmfulmagnetic fields, which may interfere with a pacemaker, for example.• Do not wrap the cables around the body.• In environments classified as dangerous, only use S-marked welding devices with a safeidle voltage level. These work environments include, for example, humid, hot or smallspaces where the user may be directly exposed to the surrounding conductive materials.EN3FastMig KM 300, 400, 500 / © Kemppi Oy /0901FISVNODAENDENLFRESPLRU