ESAB Heliarc 281iAC/DC, Operating Manual

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5. front panel Description and parameters (con't.)
1. LED Voltage input - The LED is lit when there is presence of input voltage.
2. LED Voltage output - The LED is lit when there is presence of output voltage (in Tig mode only when you
press the trigger).
3. LED Thermal Protection / Failure - The LED is lit when the machine achieves the duty cycle or there is a fail-
ure.
4. Display Voltage / Other Adjustments - The display shows the output voltage during the stand-by and the
real voltage during the welding.
5. Display Amper / Other Adjustments - The display shows the set current during the stand-by and the real
amperage during the welding.
6. AC button - The button activates the AC mode for AC welding and the LED is lit. The display shows the
wording TIG - AC.
7. Frequency Encoder - The encoder adjusts the AC frequency from 20-200 Hz. The value is shown on the
Display A (5). During the operation of adjustment the LED AC Mode is blinking.
8. Pulse Button - The button activates the Pulsing DC and AC function. In DC you can pulse from 0-300Hz in
AC from 0-2Hz. The duty in Pulse is also adjustable from 30-65%. The values are set with the encoder Amper
(14).
9. Balance Encoder - The encoder adjusts the balance of the AC from 10-90% of the set current. The value is
shown on the Display V(4).
10. Pulse LED - The LED is lit when the Pulse Button (8) is pressed and the Pulse function in ON. During the
Frequency and Duty adjustment the LED is blinking.
11. Pre-Post Gas Button - This button adjust both Pre-gas and Post-gas. By pressing the button the display V
shows PRE (pre-gas) or POS (Post gas). Adjust the Pre-gas or Post gas with the Amper Encoder (14) from 0.5-
30 seconds.
12. Final/Base Current button - This button adjust both Base Current and Final Current. By pressing the button
the display A shows the value in %. Adjust the Final/Base current with the Amper Encoder (14) from 10-90%
of the main welding current.
13. Slope Up/Down Button - This button adjust the slope down time. By pressing the button the Display A
shows the value in seconds. Adjust the slope down time with the Amper Encoder (14) from 0.1-10 seconds.
Heliarc 281i is available with adjustable slope down time only.
14. Main Encoder - Encoder for welding current and other adjustments.
15. HF LED - The LED is lit when the HF start is activate.
16. HF button - This button turns on the HF.
section 5 operation