Kemppi MasterTig 235ACDC GM Operating Manual page 70

N
Negative ignition
The sequence of TIG ignition which is on the negative side of the current. It is typically the last part of the
ignition with ACDC power sources. With DC power sources, it's the only part of the ignition with TIG.
Negative ignition current
Adjusts the current level of the negative ignition sequence (TIG).
Negative ignition time
Adjusts the length of the negative ignition sequence (TIG).
Non-linear downslope
Determines a point to which current goes down as fast as possible and then starts normal downslope.
P
Positive ignition
The sequence of TIG ignition which is on the positive side of the current. It is typically the first part of the
ignition with ACDC power sources. DC power sources don't have positive ignition with TIG.
Positive ignition current
Adjusts the current level of the positive ignition sequence. Only in ACDC power sources (TIG).
Positive ignition time
Adjusts the length of the positive ignition sequence. Only in ACDC power sources (TIG).
Post gas
Welding function that continues the shielding gas flow after the arc has extinguished. This ensures that
the hot weld does not come into contact with air after the arc is extinguished, protecting the weld and
also the electrode. Used for all metals. Especially stainless steel and titanium require longer post gas
times.
Pre gas
Welding function that starts the shielding gas flow before the arc ignites. This ensures that the metal
does not come into contact with air at the start of the weld. Time value is preset by the user. Used for all
metals, but especially for stainless steel, aluminum and titanium.
Pulse current
The higher current level of the pulse cycle. In TIG welding, its main task is to create weld pool or increase
the heat of the weld pool.
Pulse frequency
Determines how many pulse cycles is created per second (Hz).
Pulse ratio
Determines how big part of the whole pulse cycle time is spent on pulse current.
Pulse TIG
TIG welding process, where the welding current changes between two current levels: base current and
pulse current. Parameters can be set either manually or automatically. Used for optimizing the arc char-
acteristics for desired welding applications.
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MasterTig 235ACDC, 325DC, 335ACDC
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Operating manual - EN
1920900 / 1939