Process/Polarity Table; Changing Polarity; Internal Shielding Gas Supply - Miller Passport 180 Owner's Manual

4-3. Process/Polarity Table

Process Process
GMAW − Solid wire with shield-
ing gas
FCAW − Self-shielding wire −
no shielding gas

4-4. Changing Polarity

1

4-5. Internal Shielding Gas Supply

3 2
4
OM-1328 Page 12
Polarity Polarity
DCEP − Reverse polarity
DCEN − Straight Polarity
1
.
If a welding arc is not
established within one
second, the gas solenoid
turns off to conserve
shielding gas.
Cable Connections
Cable To Gun
Connect to positive (+) out-
put terminal
Connect to negative (−)
output terminal
2
Cable To Work
Connect to negative (−) output
terminal
Connect to positive (+) output
terminal
1 Lead Connections For Direct
Current Electrode Positive
(DCEP)
2 Lead Connections For Direct
Current Electrode Negative
(DCEN)
Always read and follow wire
manufacturer's recommended po-
larity, and see Section 4-3.
Close door.
Ref. 220 579-A
1 Internal Shielding Gas Bottle
The internal shielding gas bottle is
for CO gas only.
2
2 Pressure Gauge
3 Regulator
4 Internal/External Transfer
Switch
The Internal/External Transfer
switch allows changing between
the internal or external shielding
gas supply.
Place switch in the Internal Gas
Bottle position.
Ref. 803 811-A