Tig Arc Parameters/Characteristics Settings; Pre-Gas Time (7A); Start Amps (7B); Slope Up (7C) - Weldclass Weldforce 202T Operating Instructions Manual

4.5 TIG Arc Parameters/Characteristics Settings

NOTE: The following parameter settings are only available in TIG welding modes.
Figure 9
1. Keep Pressing 'Selection knob' (9) down until the desired Arc Parameter Setting Indicator Light is
lit.
2. Rotate the 'Selection knob' (9) to adjust the Setting for this Parameter Setting.

4.5.1 Pre-Gas Time (7a)

Pre-Gas (or Pre-Flow) setting is adjustable from 0 – 10 seconds. This controls the period of time the
shielding gas will flow when the torch is triggered before the arc starts. This purges the weld area from
atmospheric gas which could contaminate the start of the weld.

4.5.2 Start Amps (7b)

Start Amps (or Start Current or Initial Current or I
beginning of the weld. Adjustable 5-200A.
In 2t & SPOT Trigger Modes: This amperage setting is maintained for a fixed time after the torch trigger
is pressed at the beginning of the weld.
In 4t Modes: This amperage setting is maintained while the torch trigger is pressed down at the
beginning of the weld. Once the trigger is released the Slope Up function will begin.

4.5.3 Slope Up (7c)

Slope Up (or Up Slope or Initial Slope or t
time taken for the amperage to ramp up from Start Amps to Main Amps.

4.5.4 Main Amps (7d)

Main Amps (or Main Current or I
the Maximum current. Adjustable 5-200A.
16
START
) time setting is adjustable from 0 – 10 seconds. This is the
START
) is the main welding current. In Pulse and Bi-Level modes it represents
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) sets the welding current activated at the
.