9
2B) TOXIC FUME PREVENTION
Comply with precautions in 2-B. Generator engine exhaust must be vented to the
outside air. Carbon monoxide can kill.
2C) FIRE AND EXPLOSION PREVENTION
Comply with precautions in 2-C. Equipment’s rated capacity. Do not overload
arc welding equipment. It may overheat cables and cause a fire. Loose cable
connections may overheat or flash and cause a fire. Never strike an arc on a
cylinder or other pressure vessel. It creates a brittle area that can cause a violent
rupture or lead to such a rupture later under rough handling.
2D) SHOCK PREVENTION
Exposed live conductors or other bare metal in the welding circuit, or in unearthed,
electrically-LIVE equipment can fatally shock a person whose body becomes a
conductor. DO NOT STAND, SIT, LIE, LEAN ON, OR TOUCH a wet surface when
welding, without suitable protection.
2E) PROTECTION FOR WEARERS OF ELECTRONIC LIFE SUPPORT DEVICES (PACEMAKERS)
Magnetic fields from high currents can affect pacemaker operation. Persons
wearing electronic life support equipment (pacemaker) should consult with their
doctor before going near arc welding, gouging, or spot welding operations.
2F) TO PROTECT AGAINST SHOCK:
Keep body and clothing dry. Never work in damp area without adequate insulation
against electrical shock. Stay on a dry duckboard, or rubber mat when dampness
or sweat can not be avoided. Sweat, sea water, or moisture between body and
an electrically LIVE part - or earthed metal - reduces the body surface electrical
resistance, enabling dangerous and possibly lethal currents to flow through the
body.
1) Earthing the equipment
When arc welding equipment is earthed according to the National Electrical
Code, and the work is earthed, a voltage may exist between the electrode
and any conducting object.
Examples of conducting objects include, but are not limited to, buildings,
electrical tools, work benches, welding power source cases, workpieces, etc.
Never touch the electrode and any metal object unless the welding power
source is off. When installing, connect the frames of each unit such as welding
power source, control, work table, and water circulator to the building earth.
Conductors must be adequate to carry earth currents safely. Equipment made
electrically LIVE by stray current may shock, possibly fatally. Do NOT EARTH to
electrical conduit, or to a pipe carrying ANY gas or a flammable liquid such
as oil or fuel.
TIG WELDING
WELDING
WORKPIECE
FILLER
WELDING
GAS
METAL
CURRENT
THICKNESS
ROD
ELECTRODE
FLOW
(Amps)
(mm)
Dia (mm)
Dia (mm)
Ltr/min
30
1
0-2
1.6
4
Mild
70
2
2.0
1.6
4
Steel
115
3
2.4
2.4
4.3
140
4
2.4
2.4
4.6
35
1
0-2
1.6
4
Stainless
80
2
2.4
2.4
4.3
Steel
130
3
2.4
2.4
4.6
160
4
2.4
2.4
5
Copper
80
2
2.4
2.4
5
130
3
3.2
2.4
5
Always ensure that the gas is turned OFF at the cylinder after use.
MAINTENANCE
The ARC/TIG Inverter, requires very little maintenance other than the guidelines
shown below. Under normal working conditions removing the covers and cleaning
with dry compressed air at reduced pressure once a year will be quite sufficient.
Cleaning at more frequent intervals is advisable however, if the unit is operating in
a dusty and dirty environment.
1.
Keep the louvres clean to avoid a build up of dirt and oxides inside the
machine, which can reduce machine output.
2
Check all cables periodically: They must be in good condition and not
cracked.
3.
Always try to avoid getting particles of metal inside the machine since they
could cause short circuits.
IMPORTANT - Disconnect from mains before cleaning.
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