3-7. TIG Lift-ArctDCEN (Direct Current Electrode Negative) Connections

1

2

7

1Positive (+) Weld Output Terminal

 

 

Connect work lead to positive weld

 

4

output terminal.

5

2

Negative (−) Weld Output

 

 

 

 

Terminal

6

 

Connect TIG torch to negative weld

 

 

output terminal.

3

 

3

Gas Cylinder

 

4

Cylinder Valve

 

 

Open valve slightly so gas flow blows dirt from valve. Close valve.

5Regulator/Flowmeter

6Flow Adjust

Typical flow rate is 15 cubic feet per hour (7.1 liters per minute).

Connect torch gas hose to regulator/flowmeter.

7 Gas Valve

Valve controls gas preflow and postflow. Open valve on torch just before welding.

Tools Needed:

11/16 in, 1-1/8 in, (21 mm)

Ref. 802 888 / Ref. 803 080

OM-2237 Page 14

Page 18
Image 18
Miller Electric CST 250 manual Positive + Weld Output Terminal