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

4-3. Process/Polarity Table

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

2
3
OM-235 825 Page 14
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)
3 Insulating Boot
Always read and follow wire
manufacturer's recommended po-
larity, and see Section 4-3.
Be sure insulating boot is installed
on Negative (−) terminal.
Close door.
Ref. 220 579-A / Ref 803 811
1 Internal Shielding Gas Bottle
The internal shielding gas bottle is
for CO gas only.
2
2 Regulator
3 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.
.
Exposing the gas cylinder to
temperatures in excess of
1305 F (545 C) will cause the
pressure relief valve to
activate, resulting in the loss of
shielding gas.
S Do NOT expose gas
cylinders to direct sunlight.
S Do NOT store gas
cylinders in black storage
bag on the side of the unit.
S Do NOT operate or store
the unit in direct sunlight.
S Do NOT store gas
cylinders in a hot
automobile.
Ref. 803 811-G / Ref. 802 517-A