ESAB DTG 405 Service Manual page 65

output current
polarity reversal
Cf. Current waveform AC1 in Section "OUTPUT CURRENT IN DIFFERENT MODES".
23. Increase AC1 current to MAX.
24. Check current waveform for AC2 mode. Cf. Current waveform AC2 in Section "OUTPUT
CURRENT IN DIFFERENT MODES".
25. Connect the remote regulator to socket X5 and test.
26. Thermal trip at 0.05 Ω load resistance and maximum current.
Mode: 4-Cycle AC1-TIG with HF; frequency 50 Hz, balance 40%.
Remove the short-circuit jumper once the test has started.
27. When thermal trip has occurred, re-connect fan and water pump.
28. Connect pressure gauge. Check cooling water pressure. Adjust LOW WATER trip if neces-
sary.
29. Weld.
40 amps
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40 amps