TEKHMANN TWI-250 DB, Инструкция по эксплуатации

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manual. Have defective switches replaced by an authorized service center. Do not use the tool if the
switch does not turn it on and off.
21. Warning Use only accessories or attachments recommended in this instruction manual or in the
catalogue of TEKHMANN
ТМ.
22. Have your tool repaired by a qualified person. This electric tool is in accordance with the relevant
safety requirements. Repairs should only be carried out by qualified persons using original
TEKHMANN TM spare parts. Otherwise this may result in considerable danger to the user.
W
ARNING
! Carefully read the following instructions before operating the unit. Nonobservance
of the following precautions will make the safety system provided by the manufacturer
ineffective, which in its turn may cause serious injury (electric shock, burns) or cause fire.
General information
Welding inverter is a rectifier of the regulated current and is intended for arc direct current welding,
controlled by bridged transistor.
Specifications of the welding inverters:
• High speed and welding current adjustment accuracy, which provide high welding quality using a
welding electrode.
• Welding inverter increases mains frequency from 50 Hz to more than 20 kHz, steps down the voltage
and generates power direct current for welding by pulse-length modulation principle.
• Inverter system also allows reducing size of the transformer and reactance. Such reduction of
volume and weight improves mobility and increases performance.
Welding inverters poses other advantages, as: arc stability, easy molten pool control, easy installation
and operation, high quality and wide application area.
Safety precautions on using welding inverter
• Avoid direct contact with welding circuit. In quiescent mode the current generated by alternator can
be dangerous.
• Before installation and maintenance unplug the machine from the mains power supply.
• Perform connection according to general safety precautions.
• The welding machine must be grounded.
• Ensure the mains receptacle is grounded.
• Never operate the machine in wet conditions. Never operate under the rain.
• Never operate with damaged insulation or loose connections.
• Never weld containers, tanks or pipes, containing inflammable materials, gases or inflammable
liquids.
• Avoid welding materials cleaned with chlorinated solvents as well as in the proximity of such
solvents.
• Remove all inflammable materials (wood, paper etc.) from the working area.
• Provide adequate level of air circulation or ways of exhaust of fumes.
• Protect eyes with filter goggles, installed on a mask or hard hat. Use protective clothing.
• Never use welding machine for defrosting pipes.
• To avoid turning over install the machine on even surface.