Miller Electric PRO 300 - Manual (Page 3)

3
Function Guide
1. Self-calibrating digital weld meters with
meter maintenance displays.
2. Four Preset DIG Settings offer the best
arc characteristics for different electrodes
and joint designs. The amount of DIG
determines how much amperage (heat)
varies with Stick arc length. The combined
Process switch along with preset DIG
settings make the PRO 300 easy to set
without the complication of multiple switches.
3. Hot Start ™ provides positive Stick electrode
starts making it easy to start all types of
electrodes and it also works great for bead
tie-ins.
4. Great MIG/FCAW Performance and Arc
Starts make the PRO 300’s arc best in its
class. Easy to run all wires from .023 in
solid wires to large diameter 5/64 in
flux cored wires.
5. Lift-Arc ™ TIG with Auto-Stop ™ and
Crater-out (patents pending)
6. Standard 14-Pin Receptacle for simple
connection of remote controls and wire
feeders. It features Auto Remote Sense
™
which automatically switches from Panel to
Remote Amperage/Voltage (A/V) control
with remote connected. Eliminates
confusion of the Panel/Remote A/V switch.
7. Weatherproof Lexan ® Nameplate is super
durable and resists cracking and fading.
Color coding is for ease of operation.
8. Fuel Gauge displays engine hours and oil
change interval information.
Low Fuel Shutdown shuts engine off prior
to running out of fuel to prevent loss of fuel
in the system, and make restarts easy.
Display will read noFUEL. Turn the machine
off, add fuel, and restart.
9. Glow Plugs assist in cold weather starting.
10. Engine Control Switch is used to start the
engine and then select between Auto Idle
and High Speed Lock.
11. Amperage/Voltage Adjust Control
12. 120 VAC and 240 VAC Receptacles with
Circuit Breakers (optional 120 VAC GFCI
receptacles available).
Note: For matching plug, order #119 172.
13. Weld Output Terminals
1
8
9
10
11
12
13
3
2
6
4
5
7
ARC START
with Lift-Arc ™
Lift at any angle Touch or scratch
Shielding
gas
Shielding
gas
Arc
Workpiece
ARC END
with Auto-Stop ™
While welding
Shielding
gas
Arc
For Auto-Stop, lift up to terminate arc
Arc ends
without
flare
Move back
down to
maintain gas
coverage
Lift up
until arc
ends
Workpiece
ARC END
with Crater-out
While welding
Shielding
gas
Arc
To start Crater-out, press
momentary contact switch
Welding
current
ramps
down
Maintain
shielding
gas
coverage
Workpiece
• Eliminates need for
a remote control
• Maintains shielding
gas coverage
• Eliminates tungsten
and workpiece
contamination
• Eliminates
unwanted arc
strikes outside the
weld area
• Reduces or eliminates sticking
• Reduces or eliminates electrode/
work contamination
• Low open-circuit voltage
(approximately 10 volts)
• Maintains shielding
gas coverage
• Eliminates tungsten
and workpiece
contamination
• Crater-out time
allows for addition
of filler
• Eliminates
unwanted arc
strikes outside
the weld area