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2.3  Electrical Shock

•  Never touch ‘live’ electrical parts.
•  Always repair or replace worn or 

damaged parts.

•  Disconnect power source before 

performing any maintenance or service.

•  Earth all work materials.
•  Never work in moist or damp areas.

Avoid electric shock by:
•  Wearing dry insulated boots
•  Wearing dry leather gloves
•  Never changing electrodes with bare 

hands or wet gloves

•  Never cooling electrode holders in water
•  Working on a dry insulated fl oor where 

possible

•  Never hold the electrode and holder 

under your arm.

2.4  User Responsibility

•  Read the Operating Manual prior to 

installation of this machine.

•  Unauthorised repairs to this equipment may 

endanger the technician and operator and will 
void your warranty. Only qualifi ed personnel 
approved by BOC should perform repairs.

•  Always disconnect mains power before 

investigating equipment malfunctions. 

•  Parts that are broken, damaged, missing or 

worn should be replaced immediately. 

•  Equipment should be cleaned periodically. 

BOC stocks a huge range of personal protective 
equipment. This, combined with BOC’s 
extensive Gas and Gear network, ensures fast, 
reliable service throughout the South Pacifi c. 

PLEASE NOTE that under no circumstances 
should any equipment or parts be altered 
or changed in any way from the standard 
specifi cation without written permission 
given by BOC. To do so, will void the 
Equipment Warranty. 

Further information can be obtained 
from Welding Institute of Australia 
(WTIA) Technical Note No.7 
‘Health and Safety Welding’ 
Published  by WTIA, 
PO Box 6165 Silverwater NSW 2128 
Phone (02) 9748 4443.

Summary of Contents for MMA 140

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 14: ...14...

Page 15: ...15...

Page 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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