Tweco 200DC Inverter Arc Welding Machine - Manual (Page 33)

WELDSKILL 200AC/DC INVERTER
Manual 0-5207 3-15 INSTALLATION, OPERATION AND SETUP
Adjusting Flow Rate
Art: A-05088_AB
Figure 3-8: Adjust Flow Rate
With the regulator ready for operation, adjust working flow rate as follows:
1. Slowly turn adjusting screw/knob in (clockwise) direction until the outlet gauge indicates the required
flow rate.
NOTE
It may be necessary to re-check the shielding gas regulator flow rate following the first weld sequence
due to back pressure present within shielding gas hose assembly.
2. To reduce flow rate, allow the welding grade shielding gas to discharge from regulator by opening the
downstream valve. Bleed welding grade shielding gas into a well ventilated area and away from any
ignition source. Turn adjusting screw counter clockwise, until the required flow rate is indicated on the
gauge. Close downstream valve.
Shutdown
Close cylinder valve whenever the regulator is not in use. To shut down for extended periods (more than 30
minutes).
1. Close cylinder or upstream valve tightly.
2. Open downstream equipment valves to drain the lines. Bleed gas into a well ventilated area and away
from any ignition source.
3. After gas is drained completely, disengage adjusting screw and close downstream equipment valves.
4. Before transporting cylinders that are not secured on a cart designed for such purposes, remove
regulators.
3.13 Setup for TIG (GTAW) Welding
A. Select Lift TIG or HF TIG mode with the process selection control (refer to Section 3.08.7 for further
information).
B. Connect the TIG Torch to the negative welding terminal (-). Welding current flows from the power source
via heavy duty bayonet type terminals. It is essential, however, that the male plug is inserted and turned
securely to achieve a sound electrical connection.
C. Connect the work lead to the positive welding terminal (+). Welding current flows from the Power Source
via heavy duty bayonet type terminals. It is essential, however, that the male plug is inserted and turned
securely to achieve a sound electrical connection.