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2.1  Health Hazard Information

The actual process of welding is one that 
can cause a variety of hazards. 
All appropriate safety equipment should be 
worn at all times, i.e. headwear, respiratory, 
hand and body protection. Electrical equipment 
should be used in accordance with the 
manufacturer’s recommendations.

Eyes: 
The process produces ultra violet rays that 
can injure and cause permanent damage. 
Fumes can cause irritation.

Skin: 
Arc rays are dangerous to uncovered skin.

Inhalation: 
Welding fumes and gases are dangerous to 
the health of the operator and to those in 
close proximity. The aggravation of pre-existing 
respiratory or allergic conditions may occur in 
some workers. Excessive exposure may cause 
conditions such as nausea, dizziness, dryness 
and irritation of eyes, nose and throat.

2.2  Personal Protection

Respiratory
Confi ned space welding should be carried out 
with the aid of a fume respirator or air supplied 
respirator as per AS/NZS 1715 and AS/NZS 
1716 Standards.
•  You must always have enough ventilation in 

confi ned spaces. Be alert to this at all times.

•   Keep your head out of the fumes rising from 

the arc.

•   Fumes from the welding of some metals could 

have an adverse effect on your health. Don’t 
breathe them in. If you are welding on material 
such as stainless steel, nickel, nickel alloys 
or galvanised steel, further precautions are 
necessary.

•  Wear a respirator when natural or forced 

ventilation is not good enough.

Eye protection
A welding helmet with the appropriate welding 
fi lter lens for the operation must be worn at all 
times in the work environment. The welding arc 
and the refl ecting arc fl ash gives out ultraviolet 
and infrared rays. Protective welding screen and 
goggles should be provided for others working 
in the same area.

Clothing
Suitable clothing must be worn to prevent 
excessive exposure to UV radiation and 
sparks.  An adjustable helmet, fl ameproof loose 
fi tting cotton clothing buttoned to the neck, 
protective leather gloves, spats, apron and steel 
capped safety boots are highly recommended.

Recommended fi lter shades for 
arc welding

Less than 150 amps 

Shade 10*

150 to 250 amps 

Shade 11*

250 to 300 amps 

Shade 12

300 to 350 amps 

Shade 13

Over 350 amps 

Shade 14

*Use one shade darker for aluminium

2.0  Recommended Safety Precautions

Содержание MMA 140

Страница 1: ...MMA140 160 O P E R AT I N G M A N U A L...

Страница 2: ...es not assume any responsibility for updating any information or correcting any error or omission which may become apparent after the document has been issued Neither BOC nor any of its agents has ind...

Страница 3: ...WeldingTechniques 7 3 1 Fundamentals of Manual Metal Arc MMA Welding 7 4 0 Machine Specifications and Contents 9 4 1 Operating Controls 9 4 2 Package Contents 9 5 0 Operating Functions 10 5 1 Operati...

Страница 4: ...ylinder Never use oxygen for venting containers 1 0 Recommended Safety Guidelines Diagram and safety explanation Electrical safety alert Welding electrode causing electric shock Fumes and gases coming...

Страница 5: ...paces Be alert to this at all times Keep your head out of the fumes rising from the arc Fumes from the welding of some metals could have an adverse effect on your health Don t breathe them in If you a...

Страница 6: ...ator and will void your warranty Only qualified personnel approved by BOC should perform repairs Always disconnect mains power before investigating equipment malfunctions Parts that are broken damaged...

Страница 7: ...aining a stable arc The electrode tends to stick to the work penetration is poor and beads with a distinct rounded profile will be deposited Excessive current is accompanied by overheating of the elec...

Страница 8: ...o slow a rate of travel will frequently lead to arc instability slag inclusions and poor mechanical properties Correct work preparation The method of preparation of components to be welded will depend...

Страница 9: ...s and Contents 4 1 Operating Controls 1 2 6 4 3 5 4 2 MMA 140 Package Contents MMA140 Power source Electrode holder with cable dinse connector Work clamp with cable dinse connector Primary cable with...

Страница 10: ...electrode holder the machine should be switched off using the power switch on the machine In addition the main supply must be turned off and the plug removed from the outlet socket 5 1 Operating Machi...

Страница 11: ...60 50 60 Rated input plug A 10A 15A Output current adjustment A 15 140 15 160 Output voltage V 20 6 25 6 20 6 26 4 No load voltage V 18 18 Duty cycle 20 120A 20 160A Power factor 0 73 0 73 Efficiency...

Страница 12: ...bleshooting Main switch signal light is not lit Unit does not get electricity Check mains fuses Check mains cable and plug Unit does not weld well Arc is uneven and goes off Electrode gets stuck in we...

Страница 13: ...authorised manager of BOC This warranty is in addition to any other legal rights you may have Electrode holders and torches are not covered 8 2 Limitations on Warranty The following conditions are not...

Страница 14: ...14...

Страница 15: ...15...

Страница 16: ...n in this document are believed to be correct at the time of printing Whilst proper care has been taken in the preparation no liability for injury or damage resulting from its improper use can be acce...

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