AIR N ARC
®
300 SERIES ALL-IN-ONE POWER SYSTEM
®
GLOSSARY
090012-OP_r0
PAGE - IX
G.1 GENERAL TERMS AND
DEFINITIONS
Air/Oil Separator
- Coalescer element.
CFM
- Cubic Feet per Minute.
ft-lb
- Foot Pound (torque measurement).
N.C.
- Normally closed.
N.O.
- Normally open.
RMA
- Return Material Authorization
(number). This number is assigned by a
service technician, and is needed for
warranty claims.
RPM
- Revolutions Per Minute.
Speed Control
- Governor.
G.2 WELDING TERMS AND
DEFINITIONS
Air Carbon Arc Cutting (CAC-A) -
A cutting
process by which metals are melted by the
heat of an arc using a carbon electrode.
Molten metal is forced away from the cut by
a blast of forced air.
Alternating Current (AC) -
An electrical
current that reverses its direction at regular
intervals, such as 60 cycles alternating
current (AC), or 60 hertz.
Amperage -
The measurement of the
amount of electricity flowing past a given
point in a conductor per second. Current is
another name for amperage.
Arc -
The physical gap between the end of
the electrode and the base metal. The
physical gap causes heat due to resistance
of current flow and arc rays.
Constant Current (CC) Welding Machine -
These welding machines have limited
maximum short circuit current, with
consistent amperage regardless of the
voltage output.
Constant Voltage (CV) Welding Machine -
This type of welding machine output
maintains a relatively stable, consistent
voltage regardless of the amperage output. It
results in a relatively flat volt-amp curve.
Current -
Another name for amperage. The
amount of electricity flowing past a point in a
conductor every second.
Direct Current (DC) -
Flows in one direction
and does not reverse its direction of flow as
alternating current does.
Direct Current Electrode Negative (DCEN)
-
The direction of current flow through a
welding circuit when the electrode lead is
connected to the negative terminal and the
work lead is connected to the positive
terminal of a DC welding machine. Also
called direct current, straight polarity
(DCSP).
Direct Current Electrode Positive (DCEP)
-
The direction of current flow through a
welding circuit when the electrode lead is
connected to a positive terminal and the
work lead is connected to a negative
terminal to a DC welding machine. Also
called direct current, reverse polarity
(DCRP).
Duty Cycle -
The number of minutes out of a
10-minute time period an arc welding
machine can be operated at maximum rated
output. An example would be 60% duty cycle
at 250 amps. This would mean that at 250
amps the welding machine can be used for 6
GLOSSARY:
TERMS AND DEFINITIONS
