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S2: WELDING PARAMETERS selection button.
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The diagram shows the welding parameters that can be selected clockwise by pressing key S2. Every time the key is
pressed a led in the diagram lights up to confirm the dislpay of that parameter on the screen. Once a parameter has
been selected, turn the encoder to change its value. The new value will be automatically stored. The key is enabled
only in the TIG mode. In the MMA mode welding current led L3 remains on all the time.
To better understand the function of the parameters described below, referred to the following graph.
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L3: Welding current.
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L4: Second welding current in Bi-level TIG mode. When the torch key is quickly pressed and released (less
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than 0.5 seconds) while welding, the welding current value is brought from the one set in the "welding current"
parameter (L3) to the one set through this parameter.
L5: Base current in slow or fast pulsed TIG mode.It is the minimum current of the pulsed wave; when it is
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increased, the welding bath is created more quickly but also the heat input to the material and the heat altered zone
increase.
L6: Peak time. It is the time in which the pulsed wave is at the welding current compared with the total time
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of the pulsation cycle (t2+t3).
L7: Base time. In the slow pulsed TIG mode, LED's L6 and L7 have the above function (base time), while in
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the fast pulsed TIG mode, they are lit together and the display shows the pulsed frequency.
L8: Slope-down time. This makes it possible to set a time in which the current is taken from the welding current
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to the final current.
L9: Final current. (The CRATER FILLER CURRENT function has been provided in the four-stroke process
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only).This is the current the welder is taken to at the end of the welding process. In the four-stage applications there is a
CRATER FILLER CURRENT function (in the third stage) that permits an optimal crater closure time.
L10: Post-gas time. This determines the gas emission time once the welding arc is off.
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Inversion frequency in TIG AC. (Only AC TIG).To reduce the noise from the electric arc,
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harmonic frequencies have been selected.
This determines the frequency with which the weld current passes from DC+ to DC- and vice versa.
The picture below shows the example where the wave on the second graph has a double frequency compared with
the first. High inversion frequency values favour a greater concentration of the arc with a smaller heat altered zone
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GALA ELECTRONICS 200 ACDC 12