Tweco 161 S UK - Manual (Page 25)

OPERATION THERMAL ARC 161 S
Manual 0-5183 4-1 4-1 Operation
Figure 4-1: Thermal Arc 161 S Controls
SECTION 4:
OPERATION
Conventional operating procedures apply when using
the Welding Power Source, i.e. connect work lead di-
rectly to work piece and electrode lead is used to hold
the electrode. The welding current range values should
be used as a guide only. Current delivered to the arc is
dependent on the welding arc voltage, and as welding
arc voltage varies between different classes of electrode,
welding current at any one setting would vary according
to the type of electrode in use. The operator should use
the welding current range values as a guide then fine
tune the welding current to suit the specific applica-
tion. Refer to the electrode manufacture's literature for
further information.
4.01 Front Panel
Front Panel
The welding power source is protected by a self re-set-
ting thermostat. The indicator will illuminate if the duty
cycle of the power source has been exceeded. If the
Over Heat light illuminates wait for the Over Heat light
to extinguish before resuming welding.
(A) Process Selection Switch
Switches between LIFT TIG and STICK Welding
modes.
(B) Power On Indicator
The Power ON Indicator illuminates when the ON/OFF
switch is in the ON position and the nominal mains
voltage is present.
(C) Warning Indicator
The welding power source is protected by a self reset-
ting thermostat and over primary current protection
devices. Welding can not take place if the Warning
Indicator lights up or lights up continuously.
Thermostat Protection
If the Warning Indicator lights up then the duty cycle of
the power source has been exceeded, Leave the power
on and wait for the Warning Indicator to extinguish
before resuming welding.
Over Primary Current Protection
If the Warning Indicator lights up continuously then
the primary current into the main transformer has been
exceeded. Switch off the power supply, and have an
Accredited Thermal Arc Service Provider inspect then
repair the welder.
(D) Welding Current Control
The welding current is increased by turning the Weld
Current control knob clockwise or decreased by turning
the Weld Current control knob counterclockwise. The
welding current should be set according to the specific
application. Refer to the electrode manufacture's litera-
ture for further information.
(E) ON/OFF Switch (located on rear panel - not
shown)
This switch controls the Mains Supply Voltage to the
Power Source.
Art#: A-09902
67,&.
FAULT
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32A OUTLET STICK
TIG
230V
110V
TIG/STICK
32A OUTLET
16A OUTLET
PROCESS
(A) Process
Selection
Switch