Metabo Welding Machine MIG/MAG 140 User Manual download pdf (Page 4)

1.2

MIG/MAG 140/160

x Metals coated with lead, graphite, cadmium,

zinc, mercury or beryllium, or containing any of

these materials, can generate much smoke dur

ing welding.

x Welding releases ozone, which is a type of oxy-

gen that can lead to irritation or disorder of the

respiratory organs.

x Degreasing agents such as trichlorethylene, tet-

rachloroethylene etc. vaporise during welding

and are chemically converted into phosgene.

Phosgene is poisonous!

UV-Rays

x The arc radiation can cause eye damage and

skin burns.

x For protection against sparks, heat, visible and

invisible rays suitable eye protection gear (weld-

ing visor or helmet with standardised filter

lenses to class 10 – 15 of DIN 4647, depending

on welding current) must be worn.

x Do not look into the arc with unprotected eyes

(risk of blinding and burns). The invisible ultra-

violet radiation causes, with insufficient eye pro

tection, a very painful conjunctivitis, which

appears only hours later.

x Weld only within the range of visibility of other

persons, who can assist you in an emergency.

x Other persons or helpers near the arc must be

made aware of the hazards, and equipped with

the necessary protective gear.

x Neighbouring workplaces are to be screened off

to provide protection against radiation.

x When welding inside rooms and buildings suffi-

cient ventilation must be ensured.

Fire

Danger! 

The arc temperature is approx. 2400 °C.

Before starting to weld observe the following infor-

mation:

x Remove all combustible materials and objects

within a radius of 5 m from the welding point.

x Materials that can not be removed within a 5 m

radius must be protected by covering with sheet

metal, wet cloths etc.

x Any wall openings, cracks and the like must be

covered or sealed respectively, to prevent

uncontrolled flying of sparks.

x Keep fire extinguishing equipment such as fire

extinguisher, water pale etc. at hand.

x Keep in mind that by heat dissipation from the

welding point a fire may be started on covered

parts or in other rooms respectively.

x After completion of the welding work check the

vicinity of the welding point several times within

a period of 6 – 8 hours for heat conduction,

glowing combustion spots, hidden seats of fire

etc.

Handling of Shielding Gas Cylinders

x Observe all applicable regulations pertaining to

the handling of gas cylinders. Because of the

dangerously high internal pressure (up to 200

bar) shielding gas cylinders are to be specially

protected against mechanical damage, falling

over or falling down, heating up (max. 50°C),

prolonged radiation by sunlight and heavy frost.

x When the welding machine is equipped with a

gas cylinder too large in size this can cause, on

uneven ground, the welding machine to fall

over. To prevent subsequent damage to the

welding machine or the gas cylinder, use only

proper size gas cylinders (10l / 20l cylinders).

x Have cylinders refilled only by authorised filling

stations.

Electrical Hazards

x The connection to power mains and servicing of

the welding machine is to be done in accord-

ance with VDE regulations or other standards

applicable in your area.

x Ensure proper protective bonding of the supply

circuit.

x Ensure proper protective bonding of the work-

bench.

x Any service or maintenance work must only be

carried out by qualified personnel.

x Replace defective or damaged parts of torch or

torch leads without delay.

x The unit must only be connected to an earthed

outlet as a matter of principle. Only connections,

including outlets and extension cables with an

earthed plug, having an earth conductor and

installed by a qualified electrician, are permitted.

x The fuse protection of the supply circuit must be

in accordance with local regulations. According

to these regulations fuses or miniature circuit

breakers respectively, suitable for the conductor

cross section, must be installed. Installation of a

fuse with to high an ampere rating may cause

line fire and subsequent fire damage to the

building.

x Replace damaged torch insulation and welding

cables without delay.

x Replacement of a damaged power cable, plug

etc. and repairs to the electrical components of

the welding machine must be left to a qualified

electrician.

x Welding torches must not be held in an armlock,

or in such way that electricity can run through

the body.

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Metabo Welding Machine MIG/MAG 140 User Manual Page 4

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