WIA WELDARC 200AC/DC User manual

WELDING.COM.AU
From serial numbers M1142A*
Stick/TIG Welder
OPERATORS MANUAL | MC114-0

32
WELDING INDUSTRIES
AUSTRALIA
A Division of ITW Australia Pty Ltd
ABN: 63 004 235 063
1300 300 884
Email: [e-mail]
welding.com.au
WELDWELL
NEW ZEALAND
A Division of ITW New Zealand
NZBN: 9 429 039 833 129
GST NO: 080177186
0800 9353 9355
Email: [e-mail]
weldwell.co.nz

32
CONTENTS
Section General Information Page
Safe Practices 4
1 Introduction 7
2 Receiving 8
3 Operation 8
4 Specifications 9
5 Controls 11
6 Installation 22
7 Basic Welding Information 23
8 General Maintenance 27
9 External Trouble Shooting 27
10 Trouble Shooting Chart 28
11 Service Information 30
11.1 Circuit Diagram 31
12 Assembly & Parts List
Power Source 32
13 Assembly & Parts List
Torch 34
14 Australian Warranty
Information 35
15 New Zealand Warranty
Information 37

Weldarc 200 AC/DC | Operator Manual | Model No MC114-2
54
READ FIRST
The information contained in this
manual is set out to enable you
to properly maintain your new
equipment and ensure that you
obtain maximum operating efficiency.
Please ensure that this information is
kept in a safe place for ready reference
when required at any future time.
When ordering spare parts, please
quote the model and serial number
of the power source and part
number of the item required. All
relevant numbers are shown in lists
contained in this manual. Failure to
supply this information may result in
unnecessary delays in supplying the
correct parts.
SAFETY
Before this equipment is put into
operation, please read the Safe
Practices section of this manual.
This will help to avoid possible injury
due to misuse or improper welding
applications.
PLASTIC HANDLES
ON POWER SOURCE
Please note that the handle fitted to
the Weldarc 200AC/DC inverter is
intended for carrying the equipment
by hand only.
DO NOT use this handle for
suspending or mounting the Weldarc
in any other manner.
SAFE PRACTICES WHEN USING
WELDING EQUIPMENT
These notes are provided in the interests
of improving operator safety. They should
be considered only as a basic guide to
Safe Working Habits. A full list of Standards
pertaining to industry is available from
the Standards Association of Australia,
also various State Electricity Authorities,
Departments of Labour and Industry
or Mines Department and other Local
Health or Safety Inspection Authorities
may have additional requirements.
Australian Standard AS1674.2 provides a
comprehensive guide to safe practices
in welding.
Eye Protection
NEVER LOOK AT AN ARC WITHOUT
PROTECTION. Wear a helmet with safety
goggles or glasses with side shields
underneath, with appropriate filter lenses
protected by clear cover lens. This is a
MUST for welding, cutting, and chipping to
protect the eyes from radiant energy and
flying metal. Replace the cover lens when
broken, pitted, or spattered.
Recommended shade filter lens
Amps TIG MMAW MIG Pulsed
MIG
0-100 1 9 10 12-13
100-150 11 10 10 12-13
150-200 12 10-11 11-12 12-13
200-300 13 11 12-13 12-13
300-400 14 12 13 14
400-500 — 13 14 14
500 + — — 14 14

54
Burn Protection
The welding arc is intense and visibly bright.
Its radiation can damage eyes, penetrate
light-weight clothing, reflect from light-
coloured surfaces, and burn the skin and
eyes. Burns resulting from gas-shielded
arcs resemble acute sunburn, but can be
more severe and painful.
Wear protective clothing – leather or heat
resistant gloves, hat, and safety-toed boots.
Button shirt collar and pocket flaps, and
wear cuffless trousers to avoid entry of
sparks and slag.
Avoid oily or greasy clothing. A spark may
ignite them. Hot metal such as electrode
stubs and work pieces should never be
handled without gloves.
Ear plugs should be worn when welding in
overhead positions or in a confined space.
A hard hat should be worn when others are
working overhead.
Flammable hair preparations should not be
used by persons intending to weld or cut.
Toxic Fumes
Adequate ventilation with air is essential.
Severe discomfort, illness or death can
result from fumes, vapours, heat, or oxygen
depletion that welding or cutting may
produce. NEVER ventilate with oxygen.
Lead, cadmium, zinc, mercury, and
beryllium bearing and similar materials
when welded or cut may produce harmful
concentrations of toxic fumes. Adequate
local exhaust ventilation must be used,
or each person in the area as well as
the operator must wear an air-supplied
respirator. For beryllium, both must be used.
Metals coated with or containing materials
that emit fumes should not be heated
unless coating is removed from the work
surface, the area is well ventilated, or the
operator wears an air-supplied respirator.
Work in a confined space only while it is
being ventilated and, if necessary, while
wearing air-supplied respirator.
Vapours from chlorinated solvents can
be decomposed by the heat of the arc (or
flame) to form phosgene, a highly toxic
gas, and lung and eye irritating products.
The ultra-violet (radiant) energy of the arc
can also decompose trichlorethylene
and perchloroethylene vapours to form
phosgene. Do not weld or cut where solvent
vapours can be drawn into the welding or
cutting atmosphere or where the radiant
energy can penetrate to atmospheres
containing even minute amounts of
trichlorethylene or perchloroethylene.
Fire And Explosion Prevention
Be aware that flying sparks or falling slag
can pass through cracks, along pipes,
through windows or doors, and through
wall or floor openings, out of sight of the
operator. Sparks and slag can travel up to 10
metres from the arc.
Keep equipment clean and operable, free
of oil, grease, and (in electrical parts) of
metallic particles that can cause short circuits.
If combustibles are present in the work
area, do NOT weld or cut. Move the work if
practicable, to an area free of combustibles.
Avoid paint spray rooms, dip tanks, storage
areas, ventilators. If the work can not
be moved, move combustibles at least
10metres away out of reach of sparks
and heat; or protect against ignition with
suitable and snug-fitting fire-resistant
covers or shields.

Weldarc 200 AC/DC | Operator Manual | Model No MC114-2
76
Walls touching combustibles on opposite
sides should not be welded on or cut. Walls,
ceilings, and floor near work should be
protected by heat-resistant covers or shields.
A person acting as Fire Watcher must be
standing by with suitable fire extinguishing
equipment during and for some time after
welding or cutting if;
– Combustibles (including building
construction) are within 10 metres.
– Combustibles are further than 10
metres but can be ignited by sparks.
– Openings (concealed or visible) in floors
or walls within 10 metres may expose
combustibles to sparks.
– Combustibles adjacent to walls,
ceilings, roofs, or metal partitions can
be ignited by radiant or conducted heat.
After work is done, check that area is free
of sparks, glowing embers, and flames.
A tank or drum which has contained
combustibles can produce flammable
vapours when heated. Such a container
must never be welded on or cut, unless
it has first been cleaned as described in
AS.1674-2. This includes a thorough steam
or caustic cleaning (or a solvent or water
washing, depending on the combustible’s
solubility), followed by purging and inerting
with nitrogen or carbon dioxide, and using
protective equipment as recommended in
AS.1674-2. Water-filling just below working
level may substitute for inerting.
Hollow castings or containers must be
vented before welding or cutting. They can
explode. Never weld or cut where the air
may contain flammable dust, gas, or
liquid vapours.
Shock Prevention
Exposed conductors or other bare metal
in the welding circuit, or ungrounded
electrically alive equipment can fatally
shock a person whose body becomes
a conductor. Ensure that the equipment
is correctly connected and earthed. If
unsure have the equipment installed by a
qualified electrician. On mobile or portable
equipment, regularly inspect condition of
trailing power leads and connecting plugs.
Repair or replace damaged leads.
Fully insulated electrode holders should
be used. Do not use holders with
protruding screws. Fully insulated lock-type
connectors should be used to join welding
cable lengths.
Terminals and other exposed parts of
electrical units should have insulated knobs
or covers secured before operation.

76
1 INTRODUCTION
MMAW (Stick Welding)
Manual Metal Arc Welding (MMAW) is a
process where an arc is struck between a
flux-coated consumable electrode and the
work piece. The arc and the weld pool are
both shielded by gases generated by the
flux coating of the electrode.
The Weldarc 200 AC/DC has been
designed to be used with 2.0mm, 2.5mm,
3.2mm and 4.0mm diameter electrodes.
The smaller electrodes are used when
welding at lower currents, such as sheet
metal applications. Increasing the electrode
diameter permits higher welding currents to
be selected.
WIA supplies a wide range of mild steel and
special purpose electrodes which cater
for home workshop, rural, and industrial
requirements. Some popular AUSTARC
electrodes are listed below. The correctly
selected AUSTARC electrode will influence
the quality of the weld, and the stability
of the arc.
Austarc 12P, Classification E4313-A
A popular general purpose electrode
used with ease in all positions, vertical up
or down. The smooth forceful arc makes
it an ideal electrode for all general mild
steel applications.
Austarc 13S, Classification E4313-A
A smooth running electrode with a soft arc,
particularly suited to light sheetmetal and
smooth mitre fillet welds.
Austarc 16TC, Classification E4916-A
A low hydrogen electrode with good
arc stability and out-of-position welding
characteristics. This electrode is ideal
for medium carbon steels, or steels of
unknown analysis.
Unicord 312, Classification ES312-16
A high tensile (50tsi), chromium nickel
electrode specially formulated for joining
all alloy steels and irons, and for tool and
die maintenance.
Staincord 316L-016, Classification
E316L-16
For quality all position stainless steel
welding. Extra smooth running, high arc
stability, easy re-strike, excellent slag
removal and bead appearance.
Staincord 309Mo-16, Classification
E309LMo-16
For high quality all position stainless steel
welding. This extra low carbon alloy is
specifically indicated for AISI 309Mo type
alloys, but is also ideal for joining mild/low
alloy steel to a range of 300 and 400 series
stainless steels. Features extra smooth
running, high arc stability, easy re-strike,
excellent slag removal and bead appearance.
GTAW (TIG Welding)
Gas Tungsten Arc Welding (GTAW) is a
welding process where the arc is struck
between a non-consumable tungsten
electrode and the work piece. A ceramic
nozzle surrounds the tungsten electrode
and directs a flow of inert gas, usually
Argon, over the electrode and the weld
zone. If filler metal is required, it is hand
fed into the welding arc. The DC current
output of the Weldarc inverter is suitable
for welding most ferrous and non-ferrous
metals. The AC current output is for
welding Aluminium.

Weldarc 200 AC/DC | Operator Manual | Model No MC114-2
98
2 RECEIVING
Check the equipment received against the
shipping invoice to make sure the shipment
is complete and undamaged. If any damage
has occurred in transit, please immediately
notify your supplier.
The Weldarc inverter package contains:
– Weldarc Inverter Power Source
– Twist-lock Electrode Holder
– Work Clamp 3m
– Gas Hose
– (This) Operating Manual MC114-40.
– TIG Torch Complete WP17V121625
with valve, 5m cable with twist-lock
connection and fitted with 2.4mm
collet and ceriated tungsten
– TIG Consumable KIT
– Argon flow gauge regulator REG003
3 OPERATION
Whenever the welding output of the
Weldarc inverter is open circuit (ie not
arcing), the voltage across the welding
leads is reduced to a safe level. This
provides an increased level of safety to the
welding operator during operations such as
changing the electrode. The “VRD SAFE”
indicator on the front panel is on to confirm
the output is in the safe condition.
The term VRD refers to a “Voltage Reducing
Device”which complies with AS1674.2 for
Category “C” conditions.
If the supply cable is damaged it
must be replaced by the manufacturer,
their service agent or a similarly
qualified person.
IMPORTANT NOTICE: Warranty
may be voided if equipment is
powered from an unsuitable engine
driven generator.
Generators used to power this
equipment must have a minimum
capacity of 10 kW continuous and
incorporate output voltage regulation.
Due to variation between generators
by different manufacturers, it is
impossible for WIA to validate
operation from all generators.
Therefore, we recommend that
operation of equipment on the
generator is received from the
manufacturer before purchasing
the generator.

98
4 SPECIFICATIONS
Manufactured to Australian Standard AS60974-1
IEC60974-10 6.3.2 6.3.3.
TERM WELDARC 200 AC/DC
Rated Input Voltage 220 - 240 V
Power Frequency 50/60 Hz
Rated Input Capacity 7.5 KVA
Generator Capacity 10 KVA
Rated Maximum Supply Current Imax 20 A
Maximum Effective Supply Current Ieff 12 A
Output No Load Voltage 81 V
Supply Main Circuit Breaker 25 A
Supply Cable 2.5mm2 & Plug Rating 15 A
Extension Lead Rating 15 A
VRD Safe 12 V
Rated Output @ 40°C
Stick MMA 160 A @ 26.4 V 30% Duty
88 A @ 23.5 V 100% Duty
TIG 200 A @ 18 V 30% Duty
110 A @ 14.4 Volts 100% Duty
Current Up Slope Time 0 - 10 S
Current Down slope Time 0 - 15 S
Pulse Frequency DC: 0.2-500 Hz
AC: 0.2-20 Hz
Pulse Ratio Width Adjustment 10 - 90 %
AC Balance Control, Negative 50 - 85 %
AC Frequency 50 - 150 Hz
Arc Force Control MMA 0 - 100 %
Arc Start MMA 0 - 100 A
Post Gas Time 1 - 60 S
Pre Gas Time 0 - 5 S
Cooling Type Fan on Demand
Efficiency ≥ 80% n
Power Factor 0.99 Cos§

Weldarc 200 AC/DC | Operator Manual | Model No MC114-2
1110
TERM WELDARC 200 AC/DC
Insulation Degree H
Cover Protection Degree IP21S
Weight 17.0kg
Shipping Weight 28.0kg
Dimension L × W × H 520 x 260 x 420 mm
Shipping Dimension L × W × H 705 x 320 x 495 mm
4 SPECIFICATIONS (CONT.)

1110
5 CONTROLS
WIN635A
Power On/Off Switch
In the OFF position, this switch isolates the
power source from mains power supply.
The switch is located on the rear panel.
1 Front Panel Controls
The front control panel includes a LCD
screen, two buttons left and right, and a
rotary knob which also functions as a button
when pressed.
The screen will display different menu and
information depending on which mode has
been selected.
The button and knob have different function
depending on which Screen Menu the
controller is operating in.
1.1 Colour LCD Display
1.2 LEFT Button
Press this button to Select the option the
screen menu is displaying.
1.3 RIGHT Button
Press this button to Select the option the
screen menu is displaying.
1.4 SELECT Knob
From Start Menu, use the SELECT knob to
select the required process. Select from:
DC TIG
DC TIG Pulse
AC TIG
AC TIG Pulse
DC STICK
Settings
Use SELECT knob to adjust current.
If in a menu selection, rotate SELECT knob
to highlight required selection. Press knob
to accept selection.
1.2 LEFT Button 1.3 RIGHT Button

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2 Welding Modes
The welding machine has 1 MMA and 4
different TIG welding modes.
2.1 DC STICK
DC Stick mode allows MMA welding with
electrode holder and suitable welding
electrodes.
2.2 STICK Weld Screen Information
2.2.1 Current Adjustment
Operator can adjust the current by rotating
the SELECT knob.
A
Memory
Current
Parameter
Knob
A
89
SAFE
VRD
2.2.1 Set Current
2.2.2 VRD
Indication that
OCV is safe
Press right
button for
memory
2.3 Parameter electionPress left button
to return to
home menu
DC Stick
2.2.2 VRD Indication
When VRD is enabled, then open circuit
voltage will be reduced a level less than
35V DC which is compliant with AS1674.2
Category C requirements.
Arc starts can be more difficult with VRD
enabled. The start technique is Touch-
Twist-Lift. If VRD is not suitable for the
application, then VRD can be disabled by a
WIA service agent.
2.3 Stick Weld Parameter Change
Press the SELECT knob to enter the Weld
parameter selection menu.
There are two types of adjustments
possible:
- Weld Arc Parameter
- Machine Function

1312
Exit
Knob
Function
Adjust
Select
Current A
09
ON
VRD
DC Stick
RED indicates Selected
Weld Parameter
Weld Current Arc Force Recommended
Electrode Size
Parameter
Setting
Use Left
button to
select Exit
Rotate knob to
move to next
Parameter
Press knob
to accept
Parameter
Use Left button to
select Function
Machine
Function
Status
Hot Start
2.3.1 Weld Arc Parameters
Weld Arc Parameters can be adjusted:
Rotate the SELECT knob until the required
parameter is highlighted RED in the top part
of the screen.
Press the SELECT knob to activate the
parameter.
Rotte SELECT knob to djust the prmeter.
Press the SELECT knob to De-activate the
parameter.
Continue to select other parameter, or
press Right Button to EXIT.
2.3.1.1 Hot Start
Rotate SELECT Volt Knob to adjust Hot
Start value from 0 to 100% of the set Weld
current. Hot Start will provide a boost
current at the arc start to help arc starting,
particularly on cold material.
2.3.1.2 Weld current
The Weld Current value can be adjusted.
Weld Current can also be adjusted from the
main weld screen.
2.3.1.3 Arc Force
Rotate Select Volt Knob to adjust Arc Force
value from 0 to 100% of the Weld Current.
Arc Force will boost the weld current and
therefore weld voltage, if the machine
weld voltage is too low due to short circuit
situation within the arc.
2.3.2 Machine Function
Press the Left hand Button to activate
the Machine Function selection. For Stick
mode, there are no Machine functions to
change.

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3 TIG Mode, DC, DC Pulse, AC, AC Pulse
There are four TIG modes available.
All TIG modes are done with torch electrode
connected to negative output.
DC TIG provides a constant DC output
suitable for welding most metals except
Aluminium.
AC TIG provides an alternating Current
output which is suitable for Aluminium
welding. Aluminium material develops an
oxide coating which is an insulator, the AC
current provides some positive current which
cleans the oxide from the weld surface.
Both AC and DC can use pulse mode where
the weld current can be pulsed high low.
when the required TIG mode has been
selected, the specific weld parameter
needs to be selected.
3.1 Electrode Polarity
The first screen is information about the
correct Polarity connection. Wait for the
next screen or press SELECT.
9
Press any key or wait Seconds to Enter.

1514
3.2 TIG Main Screen
Weld Current can be adjusted by rotating
the SELECT knob.
3.3 TIG Weld Parameter Adjustment
Press the SELECT knob to enter the Weld
Parameter selection menu. There are two
levels of adjustments possible:
- Weld Arc Parameter
- Machine Function
The Menu selection is similar for all the
TIG modes.
A
Memory
Current
Parameter
Knob
A
DC TIG
46
Welding
Mode
Press for
Parameter
menu
Rotate for
Current adjust
Press for
Memory
Parameter
Status
Set Current
Press for Home
start screen
Press and Hold
the trigger to
purge the gas
from the gas
line

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Exit
Knob
Function
Adjust
Select
%
AUTO
AUTO
AUTO
Pulse AC TIG
ON
VRD
Frequency
Balance AutoSet ON
RED indicates
Selected Weld
Arc Parameter Weld Current Down Slope Final Current
Post Gas
Recommended
Electrode
Size
Parameter
Setting
Use Left button
to select Exit
Rotate knob to
move to Parameter
Press knob to
accept Parameter
Use Left button
to select Function
Machine
Function
Status
AC TIG
Parameters:
Frequency
Balance
Pre Gas
Start Current Upslope
F
Pulse DC TIG
%
AUTO
AUTO
AUTO
Peak Current Background Current
Pulse Radio Frequency

1716
3.3.1 Weld Arc Parameters
Weld Arc Parameters can be adjusted.
Rotate SELECT knob until the required
parameter is highlighted RED in the top part
of the screen.
Press the SELECT knob to activate the
parameter.
Rotate SELECT knob to adjust the
parameter.
Press the SELECT knob to De-activate the
parameter.
Continue to select other parameter, or
press Right Button to EXIT.
3.3.1.1 Pre Gas
Pre Gas Flow can be set to a maximum of
10 seconds to allow gas flow before Arc start.
3.3.1.2 Start Current
While in 4 STEP latch mode the arc will start
and maintain the ignition current output until
the trigger torch is released. The START
CURRENT can be adjusted 0-100% of the
WELD CURRENT setting. Setting the START
CURRENT high can be useful for joint preheat.
3.3.1.3 Up Slope
The UP SLOPE time is the time taken for
the weld current to transition from START
CURRENT value to WELD CURRENT value.
The time can be adjusted from 0 to 10 seconds.
3.3.1.4 Welding Current
The setting for actual weld current. The
Weld Current can also be adjusted from the
main Weld menu.
3.3.1.5 Down Slope
The DOWN SLOPE time is the time taken
for the weld current to transition from the
WELDING CURRENT value to the FINAL
CURRENT value. The time can be adjusted
from 0 to 15 seconds.
3.3.1.6 Final Current
The current at the WELD can be adjusted
to a value 0-100% of WELD CURRENT
which will allow controlled finish of the weld.
The end of weld pool (Crater) can be filled.
3.3.1.7 Post Gas
The Gas Flow after the end of the weld can
be adjusted from 0 to 30 seconds. This
feature can be used to provide a gas shield
to the cooling weld pool.
3.3.1.8 Peak Current
(Pulse Mode Only)
Pulse welding allows the current to be
pulsed between two values, the frequency
and ratio can be adjusted. This feature can
be used on thin material.
For pulse TIG the peak current of the pulse
can be adjusted.
3.3.1.9 Background Current
(Pulse Mode Only)
For pulse TIG the background current of the
pulse, or the low part of the pulse can be
adjusted as from 10-90% of the Peak Current.
3.3.1.10 Frequency
(Pulse Mode Only)
The frequency of the Current Pulse can be
adjusted from 0.2 to 20 Hz.
3.3.1.11 Pulse Ratio
(Pulse Mode Only)
The Pulse ratio is the ratio of the time of the
peak current compared to the total time of
hr pulse. The ratio can be adjusted for 10-
90%. Eg, if the pulse frequency is 1Hz (one
pulse per second) and the pulse ratio was
10%, the peak current would be on for 0.1
seconds and the background current would
be on for 0.9 seconds.

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1918
3.3.1.12 AC TIG Parameters
AC TIG mode is used for welding
Aluminium.
Arc Welding of Aluminium is difficult
because the metal readily forms an Oxide
layer, which is an electrical insulator, and
inhibits arc formation. The Oxide needs to
“cleaned off”.
Welding with Electrode positive will remove
the Oxide off the surface as the electrons
flow off the Aluminium to the tungsten
electrode. Continuous electrode positive
will burn the tip away, so the current has to
be reversed to electrode negative for some
of the time.
To achieve this an Alternating Current (AC)
for welding is required. The Alternating
Current has a FREQUENCY at which the
cycle changes positive to negative and also
a BALANCE of the proportion of positive
cycle to negative cycle.
The FREQUENCY and BALANCE can be
adjusted or set to AUTO setting where
predetermined settings are used by
the machine.
AUTO must be disabled before
FREQUENCY or BALANCE can be adjusted.
3.3.1.12.1 Balance
BALANCE is expressed as a % of the time
that the polarity is negative. Adjustment is
from 50-85%. For new clean aluminium an
AC BALANCE of 65-70% is a good
starting point.
Low % Balance
- Less time negative
- More time positive
- More cleaning action
- More heat in the tungsten
- Wider weld with shallower penetration
High % Balance
- More time negative
- Less time positive
- Less cleaning action
- Less heat in the tungsten, higher
current for smaller electrode
- Narrow weld beads
with deeper penetration
- Smaller heat affected zone
3.3.1.12.2 AC Frequency
When AC TIG mode is selected, then actual
AC frequency can be adjusted from 50
to 150Hz.
Higher frequency makes the welding
current change direction at a faster rate.
The arc becomes constricted, more stable
and directional providing deep penetrating
narrow welds.
Lower frequency the arc is wide with
shallow penetration, suitable for butt or
edge welds on thin material.
3.3.2 Machine Function
Press the Left hand button to activate the
Machine function selection.
Machine Functions: Selected shown
Highlighted.
Exit
Knob
Select
ON
VRD
OFF
VRD
Function
Parameter
DC TIG
++
%
−%
−

1918
The centre panel in Display will now
highlight the selected Functions. Three
machine functions can be changed.
- Trigger mode: 2T or 4T
- Start: HF or Lift
- Remote control: Torch or Foot Control
Rotate the SELECT knob to change the
status of the Function.
Press the SELECT knob to confirm the
selection and move to the next function.
Press the Right hand button to EXIT the menu.
3.3.2.1 Trigger Mode
Trigger mode 2T/4T provides a 2 STEP or
4 STEP trigger control while in TIG mode:
Rotate SELECT knob to Highlight 2T or 4T.
3.3.2.1.1 2T Trigger Mode
In this mode the torch trigger must be
pressed on to initiate welding and held on
until welding is finished. Up slope and down
slope, ignition current and crater current
cannot be used in the 2 STEP.
3.3.2.1.2 4T Trigger Mode
In this mode the torch trigger switch is
pressed to start the arc. After the PRE
FLOW gas time has elapsed, the Arc will
start and the current will stay at the START
CURRENT setting.
When trigger is released the current will
increase to the WELDING CURRENT
setting according to the UP SLOPE time.
Output will continue at WELDING
CURRENT setting.
When the torch trigger is pressed again,
then the weld output will decrease down to
FINAL CURRENT setting according to the
DOWN SLOPE time.
Weld output will remain at FINAL CURRENT
until torch trigger is released, then gas will
flow for POST FLOW time.
NOTE: 4T trigger cannot be selected or
used with Foot Controller.
Fig 3 Latch Mode–4 STEP
Time
Amps
IGNITION
IGNITION
CURRENT
CURRENT
PRE GAS
PRE GAS
POST GAS
POST GAS
UP SLOPE
UP SLOPE
WELDING CURRENT
WELDING CURRENT
DOWN SLOPE
DOWN SLOPE
CRATER
CRATER
CURRENT
CURRENT
Press +Hold
Torch Tr igger
Press +Hold
Torch Tr igger
Release
Torch Tr igger
Release
Torch Tr igger
Fig 2 Latch Mode–2 STEP
Time
Amps
PRE GAS
PRE GAS
POST GAS
POST GAS
WELDING CURRENT
WELDING CURRENT
Press +Hold
Torch Tr igger
Release
Torch Tr igger

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2120
3.3.2.2 TIG START
3.3.2.2.1 Lift Arc TIG
In this mode the arc start is by Lift Arc
technique.
3.3.2.2.2 High Frequency Start TIG
In this mode the start will be with High
Frequency (HF) arc start. When the tungsten
is near the work piece and the torch trigger
is pressed, then a high energy spark is
created to jump from the tungsten to the
work piece and initiate an Arc.
3.3.2.3 Remote Control
The output current of the machine can be
controlled remotely by On/Off trigger switch
control and current control adjustment
located in the torch hand piece or in
foot control.
The Remote control adjustment will allow
minimum -100% of the current setting on
the machine.
For example, if the machine is set to 150A
the remote adjustment will adjust 10-150A.
3.3.2.3.1 TIG Torch
Used for remote control adjustment, the TIG
torch will require a trigger switch and current
control potentiometer in the hand piece.
Control plug of the TIG torch is connected
to the machine remote control socket FIG 7.
Turn the machine on.
First the machine needs to be adjusted to
the maximum desired current. To do this,
the remote control knob on the TIG torch
needs to be adjusted to maximum.
Adjust to the desired maximum current
(such as 150A) on the machine with the
control knob FIG 1 (7). The AMPs digital
display will then shoe 150A.
Adjust the control knob on the TIG torch,
the AMPS display will then change as the
knob is adjusted.
3.3.2.3.2 Foot Control
For the remote control adjustment, the WIA
foot control (Part Number AA76) has an in-
built trigger switch and current control and
can be used to control the weld start and
weld current.
Control plug of the TIG torch is connected
to the machine remote control socket FIG 7.
Turn the machine on.
First the machine needs to be adjusted to
maximum desired current Select LIFT TIG
MODE to prevent HF during setup.
Press the foot control pedal to maximum.
Adjust to the desired maximum current
(such as 150A) on the machine with the
control knob FIG 1 (7). The AMPS digital
display will then show 150A.
Release the foot control pedal and the
current will adjust down from 150A to 10A.
HF MODE can now be selected if required.