Tweco 161 S Inverter Arc Welder - Manual (Page 21)

INTRODUCTION THERMAL ARC 161 S
Manual 0-5073 2-1 Introduction
SECTION 2:
INTRODUCTION
2.01 How to Use This Manual
This Operating Manual usually applies to the part numbers
listed on page i. If none are underlined, they are all covered
by this manual. To ensure safe operation, read the entire
manual, including the chapter on safety instructions and
warnings. Throughout this manual, the word WARNING,
CAUTION and NOTE may appear. Pay particular attention
to the information provided under these headings. These
special annotations are easily recognized as follows:
!
WARNING
Gives information regarding possible personal
injury. Warnings will be enclosed in a box
such as this.
CAUTION
Refers to possible equipment damage. Cau-
tions will be shown in bold type.
NOTE
Offers helpful information concerning certain
operating procedures. Notes will be shown
in italics
2.02 Equipment Identification
The unit’s identification number (specification or part
number), model, and serial number usually appear on
a nameplate attached to the machine. Equipment which
does not have a nameplate attached to the machine is
identified only by the specification or part number printed
on the shipping container. Record these numbers for
future reference.
2.03 Receipt of Equipment
When you receive the equipment, check it against the
invoice to make sure it is complete and inspect the
equipment for possible damage due to shipping. If there is
any damage, notify the carrier immediately to file a claim.
Furnish complete information concerning damage claims
or shipping errors to the location in your area listed in the
inside back cover of this manual. Include all equipment
identification numbers as described above along with a
full description of the parts in error.
2.04 Description
This compact inverter welding machine has infinitely
adjustable welding current from 10 to 160 amps. It uses
standard general purpose STICK (SMAW) 3/32” (2.5mm)
electrodes for light gauge work, generally less than
1/8” (3.2mm) thick and STICK (SMAW) 1/8” (3.2mm)
electrodes for heavier material. The unit also has a LIFT
TIG (GTAW) welding mode that offers stable TIG welding
characteristics when used with a suitable TIG torch and
shielding gas.
2.05 Transportation Methods
WARNING
ELECTRIC SHOCK can kill. DO NOT TOUCH
live electric parts. Disconnect input power
conductors from de-energized supply line
before moving the welding power source.
!
WARNING
FALLING EQUIPMENT can cause serious
personal injury and equipment damage.
Lift unit with handle on top of case. Use handcart or similar
device of adequate capacity. If using a fork lift vehicle,
place secure unit on a proper skid before transporting.
2.06 Duty Cycle
The rated duty cycle of a Welding Power Source, is the
percentage of a ten minute time period that it may be
operated at its rated output current without exceeding
the temperature limits of the insulation of the component
parts. To explain the 10 minute duty cycle period, suppose
a Welding Power Source is designed to operate with
a 30% duty cycle at 160 amperes and 26.4 volts. This
means that it has been designed and built to provide the
rated amperage (160A) for 3 minutes, i.e. arc welding
time, out of every 10 minute period (30% of 10 minutes
is 3 minutes). During the other 7 minutes of the 10
minute period the Welding Power Source must idle and
be allowed to cool.