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Example: The Peak Current control is preset at 50 amps and the Amptrol is partially down, giving a peak current of 30 amps. If the Background Current control is set at 50%, the Background (low pulse) current will be 15 amps.
The Amptrol raises and lowers the Peak current. Since Background current is always a percentage of Peak current, the Amptrol also raises and low- ers the Background current.
Pulse % On — Controls the percentage of the pulse cycle that is at the Peak current.
Example: You are pulsing at 1 Pulse per second with a 30% Pulse % On setting. The welding cur- rent would be at the Peak current for 0.3 seconds and at the Background current for the remainder of the cycle, 0.7 seconds.
16.CRATER FILL CONTROLS
Use the Crater Fill controls to automatically control current
Crater Fill Switch — A
ON: Crater Fill
OFF: Locks out Crater Fill controls.
Crater Fill % Peak Current Control — Controls the final Crater Fill current from zero to 100% of the weld current preset on the Peak Current con- trol.
Example: WIth a Crater Fill % Current setting of 20% and a weld current preset at 100 amps, the current will fade from 100 amps to 20 amps and then dwell at 20 amps for about
The final Crater Fill current dwell time is approxi- mately
17.STATUS INDICATOR LEDs — Seven Light Emitting Diodes (LEDs) which light when their function is active.
•GAS & WATER LED is on when the solenoid valves are open, from the beginning of Preflow to the end of Afterflow.
•HIGH FREQUENCY LED is on when the high frequency circuit is on.
FIGURE B.2 – STATUS INDICATOR LIGHT SEQUENCE
SQUARE WAVE TIG 355
SQUARE WAVE TIG 355