EWM Tetrix 352 Synergic Operating Instructions Manual page 81

Pore formation
  I nadequate or missing gas shielding
Check shielding gas setting and replace shielding gas cylinder if necessary
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Shield welding site with protective screens (draughts affect the welding result)
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Use gas lens for aluminium applications and high-alloy steels
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 Unsuitable or worn welding torch equipment
Check size of gas nozzle and replace if necessary
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 Condensation (hydrogen) in the gas tube
Purge hose package with gas or replace
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Bad arc ignition
 Material inclusions in the tungsten electrode due to contact with filler material or workpiece
Regrind or replace the tungsten electrode

 Bad current transfer on ignition
Check the setting on the "Tungsten electrode diameter/Ignition optimisation" rotary dial and

increase if necessary (higher ignition energy).
099-000141-EW501
12.01.2016
Rectifying faults
Checklist for rectifying faults
81