CIGWELD WELDSKILL 200HF Operating Manual page 24

200HF
3. Over Temp Indicator
This welding power source is protected by a self resetting thermostat. The Over Temp indicator will illuminate
if the machine has over heated which normally occurs if the duty cycle of the power source has been exceeded.
Should the Over Temp indicator illuminate the output of the power source will be disabled. Leave the power
source turned On to allow the internal components to cool down. Once the power source cools down sufficiently
the Over Temp indicator will automatically go off. Note that the On/Off switch should remain in the On position
such that the fan continues to operate thus allowing the power source to cool sufficiently.
4. Process Selection Control
The process selection control is used to select the desired welding mode. Three modes are available, HF
TIG, Stick and Lift TIG modes. Refer to section 5.02 for TIG (GTAW) set-up details or section 6.01 for Stick
(MMAW) set-up details .
5. Trigger Mode Control (Lift TIG and HF TIG Modes only)
The trigger mode control is used to switch the functionality of the torch trigger between 2T (normal), and 4T
(latch mode).
2T (Normal Mode)
In this mode, the torch trigger must remain depressed for the welding output to be active. Press and hold the
torch trigger to activate the power source (weld). Release the torch trigger switch to cease welding.
Note:
The Preflow time is a fixed value
of 0.1 of a second and is not
adjustable.
OPERATION
OPERATING MANUAL
2T LIFT TIG
Lift TIG
Current
TRIGGER
PRESSED
2T HF TIG
Preflow
TRIGGER
PRESSED
Figure 4-2: 2T Timing Sequence
Weld
Current
Tungsten Lifted
Off the Work Piece
TRIGGER
RELEASED
Weld
Current
TRIGGER
RELEASED
4-2
Downslope Time
Minimum Current
Postflow
Note: For Postflow operation
refer to 4.02.15.
Downslope Time
Minimum Current
Postflow
Art # A-12968
Manual 0-5406