Jasic TIG Series User manual

2
Your new product
Thank you for selecng this Jasic product.
This product manual has been designed to ensure that you get the most from your new product. Please
ensure that you are fully conversant with the informaon provided paying parcular aenon to the
safety precauons. The informaon will help protect yourself and others against the potenal hazards
that you may come across.
Please ensure that you carry out daily and periodic maintenance checks to ensure years of reliable and
trouble free operaon.
Please call your Jasic distributor in the unlikely event of a problem occurring.
Please record below the details from your product as these will be required for warranty purposes and to
ensure you get the correct informaon should you require assistance or spare parts.
Date purchased ________________________________________
From where ________________________________________
Serial number ________________________________________
(The serial number is normally located on the top or underside of the machine and will begin with AA)
For further informaon on your Jasic product warranty registraon please visit:
www.jasic-warranty.co.uk
Disclaimer
Whilst every eort has been made to ensure that the informaon contained within this manual is
complete and accurate, no liability can be accepted for any errors or omissions.
Please note:
Products are subject to connual development and may be subject to change without noce.
Regularly check our product pages at www.Jasic.co.uk for revision updated operang manuals.
No part of this manual may be copied or reproduced by any means without the wrien permission of
Wilkinson Star Limited.

3
CONTENTS
Index Page
Your New Product 2
Index 3
Safety Instrucon 4
General electrical safety 4
General operang safety 4
PPE 5
Welding processes lens shade selector guide 5
Fume and welding gases 6
Fire risks 6
The working environment 7
Protecon from moving parts 7
Magnec elds 7
Compressed gas cylinders and regulators 7
RF declaraon 8
LF declaraon 8
Materials and their disposal 8
Product Overview 9
Technical Specicaons 10
Descripon of Controls 11
Descripon of Funcons 13
Installaon 17
Operaon MMA 19
Operaon TIG 21
Remote Control Socket 29
Guide to MMA Welding 30
MMA Welding Problems 34
Guide to TIG Welding 35
TIG Welding Torch 2
TIG Welding Problems 44
Maintenance 46
Service Schedule Record 46
Troubleshoong 47
EC Declaraon of Conformity 49
WEEE Disposal 49
RoHS Compliance Declaraon 49
Statement of Warranty 50
Opons and Accessories 51
Jasic Contact Details 52

4
SAFETY INSTRUCTION
These general safety norms cover both arc welding machines and plasma cung machines unless
otherwise noted.
It is important that users of this equipment protect yourselves and others from harm or even death.
The equipment must only be used for the purpose it was designed for. Using it in any other way could
result in damage or injury and in breach of the safety rules.
Only suitably trained and competent persons should use the equipment.
Pacemaker wearers should consult your doctor prior to using this equipment.
PPE and workplace safety equipment must be compable for the applicaon of work involved.
Always carry out a risk assessment before undertaking any welding or cung acvity
General electrical safety
The equipment should be installed by a qualied person and in accordance with current
standards in accordance with current standards in operaon. It is the users responsibility
to ensure that the equipment is connected to a suitable power supply. Consult with your
ulity supplier if required. Do not use the equipment with the covers removed.
Do not touch live electrical parts or parts which are electrically charged.
Turn o all equipment when not in use.
In the case of abnormal behaviour of the equipment, the equipment should be checked by a suitably
qualied service engineer.
If earth bonding of the work piece is required, bond it directly with a separate cable with a current
carrying capacity capable of carrying the maximum capacity of the machine current.
Cables (both primary supply and welding) should be regularly checked for damage and overheang.
Never use worn, damaged, under sized or poorly jointed cables.
Insulate yourself from work and earth using dry insulang mats or covers big enough to prevent any
physical contact.
Never touch the electrode if you are in contact with the work piece return.
Do not wrap cables over your body.
Ensure that you take addional safety precauons when you are welding in electrically hazardous
condions such as damp environments, wearing wet clothing and metal structures.
Try to avoid welding in cramped or restricted posions.
Ensure that the equipment is well maintained. Repair or replace damaged or defecve parts immediately.
Carry out any regular maintenance in accordance with the manufacturers instrucons.
The EMC classicaon of this product is class A in accordance with electromagnec compability
standards CISPR 11 and IEC 60974-10 and therefore the product is designed to be used in industrial
environment only.
WARNING: This class A equipment is not intended for use in residenal locaons where the electrical
power is provided by a public low-voltage supply system. In those locaons it may be dicult to ensure
the electromagnec compability due to conducted and radiated disturbances.
General operang safety
Never carry the equipment or suspend it by the carrying strap or handles during welding.
Never pull or li the machine by the welding torch or other cables. Always use the correct li points or
handles. Always use the transport under gear as recommended by the manufacturer.
Never li a machine with the gas cylinder mounted on it.
If the operang environment is classied as dangerous, only use S-marked welding equipment with a safe
idle voltage level. Such environments may be for example: humid, hot or restricted accessibility spaces.

5
SAFETY INSTRUCTION
Use of Personal Protecve Equipment (PPE)
Welding arc rays from all welding processes produce intense, visible and invisible (ultraviolet and
infrared) rays that can burn eyes and skin.
• Wear an approved welding helmet ed with an appropriate shade of
lter lens to protect your face and eyes when welding or watching.
• Wear approved safety glasses with side shields under your helmet.
• Never use broken or faulty welding helmets.
• Always ensure there are adequate protecve screens or barriers to
protect others from ash, glare and sparks from the welding area.
• Ensure that there are adequate warnings that welding or cung is
taking place.
• Wear suitable protecve ame resistant clothing, gloves and footwear.
• Check and be sure the area is safe and clear of inammable material
before carrying out any welding.
Some welding and cung operaons may produce noise. Wear safety ear
protecon to protect your hearing if the ambient noise level exceeds the
local allowable limit (e.g: 85 dB).
Welding and Cung Lens Shade Selector Guide

6
SAFETY INSTRUCTION
Safety against fumes and welding gases
The HSE have idened welders as being an ‘at risk’ group for occupaonal diseases arising
from exposure to dusts, gases, vapours and welding fumes. The main idened health eects
are pneumonia, asthma, chronic obstrucve pulmonary disease (COPD), lung and kidney
cancer, metal fume fever (MFF) and lung funcon changes.
During welding and hot cung ‘hot work’ operaons, fumes are produced which are
collecvely known as welding fume. Depending upon the type of welding process being performed, the
resultant fume generated is a complex and highly variable mixture of gases and parculates.
Regardless of the length of welding being carried out, all welding fume, including mild steel welding
requires suitable engineering controls to be in place which is
usually Local Exhaust Venlaon (LEV) extracon to reduce the
exposure to welding fume indoors and where LEV does not
adequately control exposure it should also be enhanced by using
suitable respiratory protecve equipment (RPE) to assist with
protecng against residual fume.
When welding outdoors appropriate RPE should be used.
Prior to undertaking any welding tasks an appropriate risk
assessment should be carried out to ensure expected control
measures are in place.
Locate the equipment in a well-venlated posion and keep
your head out of the welding fume.
Do not breathe the welding fume.
Ensure the welding zone is well-venlated and provision should be made for suitable local fume
extracon system to be in place.
If venlaon is poor, wear an approved airfed welding helmet or respirator.
Read and understand the Material Safety Data Sheets (MSDS’s) and the manufacturer’s instrucons for
metals, consumable, coangs, cleaners and de-greasers.
Do not weld in locaons near any de-greasing, cleaning or spraying operaons.
Be aware that heat and rays of the arc can react with vapours to form highly toxic and irritang gases.
For further informaon please refer to the HSE website www.hse.gov.uk for related documentaon.
Precauons against re and explosion
Avoid causing res due to sparks and hot waste or molten metal.
Ensure that appropriate re safety devices are available near the
welding and cung area.
Remove all ammable and combusble materials from the welding,
cung and surrounding areas.
Do not weld or cut fuel and lubricant containers, even if empty. These must be
carefully cleaned before they can be welded or cut.
Always allow the welded or cut material to cool before touching it or placing it in
contact with combusble or ammable material.
Do not work in atmospheres with high concentraons of combusble fumes, ammable gases and dust.
Always check the work area half an hour aer cung to make sure that no res have begun.
Take care to avoid accidental contact of electrode to metal objects. This could cause arcs, explosion,
overheang or re.
Understand your re exnguishers
An example of personal fume protection

7
SAFETY INSTRUCTION
The Working environment
Ensure the machine is mounted in a safe and stable posion allowing for cooling air circulaon.
Do not operate equipment in an environment outside the laid down operang parameters.
The welding power source is not suitable for use in rain or snow.
Always store the machine in a clean, dry space.
Ensure the equipment is kept clean from dust build up.
Always use the machine in an upright posion.
Protecon from moving parts
When the machine is in operaon keep away from moving parts such as motors and fans.
Moving parts, such as the fan, may cut ngers and hands and snag garments.
Protecons and coverings may be removed for maintenance and controls only by qualied personnel
aer rst disconnecng the power supply cable.
Replace the coverings and protecons and close all doors when the intervenon is nished and before
starng the equipment.
Take care to avoid geng ngers trapped when loading and feeding wire during set up and operaon.
When feeding wire be careful to avoid poinng it at other people or towards your body.
Always ensure machine covers and protecve devices are in operaon.
Risks due to magnec elds
The magnec elds created by high currents may aect the operaon of pacemakers or elec-
tronically
controlled medical equipment.
Wearers of vital electronic equipment should consult their physician before beginning any arc
welding, cung, gouging or spot welding operaons.
Do not go near welding equipment with any sensive electronic equipment as the magnec elds may
cause damage.
Keep the torch cable and work return cable as close to each other as possible throughout their length.
This can help minimise your exposure to harmful magnec elds.
Do not wrap the cables around the body.
Handling of compressed gas cylinders and regulators
Mishandling gas cylinders can lead to rupture and the release of high pressure gas.
Always check the gas cylinder is the correct type for the welding to be carried out.
Always store and use cylinders in an upright and secure posion.
All cylinders and pressure regulators used in welding operaons should be handled with care.
Never allow the electrode, electrode holder or any other electrically “hot” parts to touch a cylinder.
Keep your head and face away from the cylinder valve outlet when opening the cylinder valve.
Always secure the cylinder safely and never move with regulator and hoses connected.
Use a suitable trolley for moving cylinders.
Regularly check all connecons and joints for leaks.
Full and empty cylinders should be stored separately.
Never deface or alter any cylinder

8
SAFETY INSTRUCTION
RF Declaraon
Equipment that complies with direcve 2014/30/EU concerning electromagnec compability (EMC)
and the technical requirements of EN60974-10 is designed for use in industrial buildings and not those
for domesc use where electricity is provided via the low voltage public distribuon system.
Dicules may arise in assuring class A electromagnec compability for systems installed in domesc
locaons due to conducted and radiated emissions.
In the case of electromagnec problems, it is the responsibility of the user to resolve the situaon.
It may be necessary to shield the equipment and t suitable lters on the mains supply.
LF Declaraon
Consult the data plate on the equipment for the power supply requirements.
Due to the elevated absorbance of the primary current from the power supply network, high power
systems aect the quality of power provided by the network. Consequently, connecon restricons or
maximum impedance requirements permied by the network at the public network connecon point
must be applied to these systems.
In this case, the installer or the user is responsible for ensuring the equipment can be connected,
consulng the electricity provider if necessary.
Materials and their disposal
Welding equipment is manufactured with BSI published standards meeng CE requirements materials
which do not contain any toxic or poisonous materials dangerous to the operator.
Do not dispose of the equipment with normal waste. The European Direcve 2012/19/EU on Waste
Electrical and Electronic Equipment states the electrical equipment that has reached its end of life must
be collected separately and returned to an environmentally compable recycling facility for disposal.
For more detailed informaon please refer to the HSE website www.hse.gov.uk

9
PRODUCT OVERVIEW
The Jasic TIG inverter range of welding machines have been designed as
integrated and portable welding power supply units incorporang the most
advanced IGBT inverter technology in power electronics with easy operaon
and adjustment due to friendly user interface.
This is a digital DC inverter welder with complete funcons, high performance
and advanced technology. It is a mul-funcon welder with DC TIG welding,
DC pulsed TIG welding, coated electrode manual welding and TIG spot welding.
It can be widely used in the ne welding operaons of various types of metal
materials except aluminum and aluminum alloy.
The unique electrical structure and air duct design inside the machine can accelerate
the dissipang of the heat generated by the power devices, thus increasing the duty cycle
of the machine. This design oers “air ght” protecon to sensive controls which provides an eecve
dust proof and waterproof performance, thus greatly improving the reliability of the machine.
The TIG 300P provides excellent welding performance, rich funcon integraon, high eciency, small
size, light weight and many other features make it able to meet the welding requirements of all types of
welding applicaons.
Jasic TIG 300P Product Features:
• Compact size, lightweight and modern design
• DC TIG welding, DC pulsed TIG welding and shielded metal arc welding (MMA).
• Mulple remote current control opons: Foot pedal remote control, digital torch remote control and
analog torch remote control.
• Real-me digital display of output current: Displays the output status of the welder.
• Operang status is displayed by LED indicators dynamically and the current operang status is displayed
constantly.
• Hot start for manual welding: Enables the arc striking during manual welding to be easier and more
reliable starts.
• VRD funcon: Ensures the personal safety of the operator and prevents electric shock due to high voltage
in MMA mode.
• An-scking funcon: Prevents the welding electrode from scking to the work piece during welding.
• Auto-adapve arc force: Improves signicantly the welder’s performance in extended length welding and
makes long distance welding possible.
• Advanced arc striking funcon: TIG welding supports Li/contact arc ignion
and non-contact arc ignion. A high-voltage arc ignion circuit improves the
success rate of high-frequency arc striking.
• Intelligent fan control: Energy eciency and noise is reduced as the fan runs
“on demand”. This reduces the amount of dust that is deposited inside the
machine, thus increasing the service.
• Parameter storage: This is the funcon to save parameters through mulple
channels and keep the parameters saved ready for recall at any me.
• Diagnosis and protecon system based on ARM enables the machine to conduct
a power-on self-test and detect any problems instantly. Mulple protecon
systems including phase loss protecon, over-current protecon, over and
under voltage protecon, overheat protecon etc. helps to enhance the
service life of the machine.
• Cooling tank interface: Enables the intelligent control on water system so the unit
only operates “on demand”.
• High quality tacle nish to mouldings and handle
• Available packages are air cooled or water cooled

10
TECHNICAL SPECIFICATIONS
Please Note
Due to variaons in manufactured products all claimed performance rangs, capacies, measurements,
dimensions and weights quoted are approximate only. Achievable performance and rangs when in use
can depend upon correct installaon, applicaons and use along with regular maintenance and service.
Technical Parameter Unit TIG 300P
Rated input voltage VAC 400V +/- 15%50/60HZ
Input current Ie A9.9
Input Power kVA 9.5 TIG / 8.5MMA
MMA output characteriscs
Current output range A20 ~ 210
Arc force current range A0 ~ 60
Hot start current range A0 ~ 60
No load current V60
VRD voltage V11.8
TIG output characteriscs
Current output range A5 – 300
No load voltage V60
Inial current range A5 ~ 300
Crater current range A5 ~ 300
Peak current range A5 ~ 300
Base current range A5 ~ 300
Pulse frequency range Hz 0.5 ~ 200
Pulse duty cycle %10 ~ 90
Pre ow me S0 ~ 15
Post ow me S0.5 ~ 15
Upslope me S0 ~ 10
Downslope me S0 ~ 10
Spot welding me S0.1 ~ 10
Arc ignion methods - HF and li arc start
Duty cycle MMA %210 @ 50
TIG 300 @ 20
Overall eciency %85
Housing protecon grade IP 23S
Power factor cosφ0.84
Insulaon grade - F
Standard IEC60974-1
Noise Db <70
Humidity %≤90 (no condensaon of water drops)
Temperature Range Storage temperature °C -10° ~ 40°
Operang temperature °C -25° ~ 55°
Size Power source only mm 566 x 224 x 405
Water cooled package 940 x 420 x 1130
Weight Power source only Kg 19.4
Water cooled package 74
Remote control opon Yes

11
CONTROLS
Front view Jasic TIG 300P
1. Digital Control Panel: See page 12 for in depth
explanaon of the controls
2. "+" Output terminal: To connect the work clamp in
TIG mode or the electrode holder in MMA mode
3. "-" Output terminal: To connect the TIG torch or
work clamp in MMA mode
4. 9 pin remote connecon: See page 29 for further
details
5. Gas Outlet: used to connect the gas ng/hose of
the TIG torch
Rear view Jasic TIG 300P
6. Water cooler supply outlet: The oponal cooler plug
will connect to this socket
7. Gas Inlet: The gas supply hose connect to this inlet
8. Mains input supply cable
9. Control Fuse: This fuse is for water cooler output and
is rated at 5amps
10. Mains input ON/OFF power switch

12
CONTROLS
Control panel view Jasic TIG 300P
1. Welding mode selecon zone: Welding mode selecon zone contains welding mode indicators and
selecon key. Welding modes include DC TIG, Pulse TIG, DC MMA. Press the welding mode selecon
key to choose the according welding mode. The welding mode selected will be indicated by the
corresponding LED being lit and there is welding current owing
2. Digital meter: Displays pre-set and actual current before and during welding. Also used to display
parameter adjustment sengs along with any error codes
3. MMA parameter selecon zone: By pressing the switch you will have access to adjust hot start,
current and arc force in MMA mode
4. Parameter selecon area: Pushing the selecon switch (5) will highlight the LED of the parameter to
be adjusted in the selecon area
5. Parameter selecon buon: Press to select the required welding parameter to be adjusted
6. VRD (voltage reducon device) indicator
7. Adjustment control dial: Rotang this dial will adjust selected parameter shown in the digital display
8. CH is the weld parameter recall/storage channel selector
9. TIG torch switch mode selecon area
10. Remote control selecon: Pressing this key will set current control from the panel or a remote device
such as a foot pedal or TIG torch remote potenometer
11. TIG starng mode selecon area (contact or non contact ignion): When you press this switch, you
either select HF arc ignion or li arc TIG mode and the matching indicator will illuminate
12. Cooling selector switch (water or air): Using this switch will turn on/o the ed TIG water cooler and
the matching indicator will illuminate

13
FUNCTIONS
Welding mode selecon switch
The welding mode selecon zone contains the welding mode indicators along
with the mode selecon switch for TIG DC, TIG Pulse and MMA welding modes.
Press the welding mode selecon key to choose the according welding mode.
The welding mode being selected LED will be lit when selected and there is
welding current owing.
MMA parameters selecon zone
This area contains the MMA parameters selecon.
1. Ensure you are in MMA mode (as described above).
2. By pressing the key you will circulate through hot start,
current and arc force funcons.
These funcons are not available during TIG and TIGP modes.
The display and parameter area
This area contains the display meter, unit parameters indicators and the warning indicator.
1. The window in the middle is a display to show all user parameters
2. O.C on the le is the over current protecon LED
3. O.C on the le is the over current protecon LED
4. O.H on the le is the over heat protecon LED
5. The A LED on the right is current
6. The S LED on the right is me in seconds
7. The % LED on the right is percentage
8. The Hz LED on the right is frequency respecvely
9. Error codes will also be shown on this display
Selector switch
This buon is used to navigate around the control panel.
VRD Indicator
The VRD LED will be lit when the machine is in MMA mode and the VRD funcon is enabled.
Parameter adjustment rotary knob
Parameter adjustment rotary knob is for adjusng all welding parameter
available to the user.

14
FUNCTIONS
TIG opons selecon zone
This TIG opons zone includes 4 parts:
TIG torch trigger mode selecon, TIG torch trigger remote control opons, HF arc ignion switch for
either HF ignion or li TIG arc starng and a water cooling mode switch which are described in a lile
more details as below:
1. Trigger funcon modes: 2T, 4T, repeat and spot. Press the ‘mode’ key to select the required welding
trigger mode and depending on your selected TIG torch trigger opon the corresponding LED indicator
will illuminate, See page 27 For further details.
2. Remote control mode: Pressing the ‘remote’ key will allow you to set current control from the control
panel, remote device TIG torch remote potenometer or a foot pedal, depending on your selected
remote opon the corresponding LED indicator will illuminate
3. TIG Arc ignion type.
（a） Press the ‘HF’ key and when the HF (top) indicator is ON, you have engaged HF arc ignion.
（b） Press the ‘HF’ key again and when the li arc (boom) indicator is On, you have entered li arc
ignion. When in this mode you place the torch to contact work piece, pull torch trigger then li the
torch slowly to achieve arc ignion.
4. Water cooling switch (TIG mode only for the JT-300P air/water cooled package).
By pressing the ‘cooling’ key, you will select the following cooling modes:
(a) When this indicator is lit it shows the machine is in air cooling mode. The cooler will not start
and if a water cooled torch is used then this will likely fail.
(b) When this indicator is lit it shows the machine is in water cooling mode. When a welding
arc is established the cooler unit will start and stop automacally aer welding is
complete. When the cooler runs and no welding is carried out it will automacally turn of aer 15
minutes.
When using a water cooled TIG torch the water cooling system will monitor the water ow and if for
some reason the cooling tank is empty or ow stops or there is a ow restricon then E-71 warning will
show on the control panel digital display and the machines welding output will stop. The user should
then check the cooling system.

15
FUNCTIONS
TIG parameters selecon zone
Press to circulate clockwise and select the required TIG parameter.
Please note: Ib, Hz and % is only available when TIG pulse (TIGP) welding mode is selected
Tspot is only available when in spot (•••) trigger mode is selected
Channel key
The TIG 300P is equipped with 8 welding parameters storage channels for DC TIG, Pulse TIG and
DC MMA.
When the TIG 300P is turned on, it will be working in a certain stored channel which will be the
channel previously used prior to being turned o.
To check the channel number, press the channel key while the machine is in standby mode and the
display window will show the current channel number, for example, when the current working channel is
number 6, then the digital display will show CH-6.
To change the channel number, simply press the channel key when machine is in standby mode and the
display window will show the current channel number, to change this use the rotary adjustment knob to
change the working channel number from CH-1 to CH-8.
To exit channel management just press the CH key again.
Storing channel (weld) parameters is done by rst choosing the required channel number you wish to
save too, then adjust the required user welding parameters, the operator then has to start the welding
process to automacally save the current welding parameters.
PLEASE NOTE:
If the operator does not strike an arc aer making weld parameter adjustments on a selected channel
number, the system will not save the current parameters which means, if the machine is turned o then
turned back on, it will automacally revert back to the previous channel number and welding parameters.
To load stored channel parameters, press the channel key when the machine is under standby mode, the
digital display will show the current working channel. To access to required stores channel rotate the
control dial to change the channel numbers from CH-1 to CH-8.
Re-press the CH key aer selecng the required channel number and the system will now show all the
parameters under this channel for operator’s usage.
Tpre - Pre ow me Ib - Base current Hz - Pulse frequency
Is - Inial Current Tdown - Downslope me % - Pulse duty cycle
Tup - Upslope If - Final current Tspot - Spot welding me
Ip - Peak current Tpost - Post ow me

16
FUNCTIONS
Water cooler (water cooled package only)
The TIG 300P can come complete as a water cooled package which is supplied with a TIG torch water
cooler which mounts on a trolley with the Jasic inverter power source mounted above.
The water cooler front panel includes a work indicator, control ON/OFF switch and quick connectors for
the water output (blue) and water input (red) which allow connecon to the TIG torch.
1. The work indicator is a visual means of leng the user know if the water cooler is turned ON or not.
• If the work indicator is ON, then the water cooler is pumping coolant around the TIG torch
• If the work indicator is OFF, then it means the water cooler is not funconing.
2. The water cooler operaon status is controlled by the Jasic power source. When the machine
power source is under TIG water cooling, which is to say, the indicator is ON, the opons are:
• When there is current output from the power source the water cooler work indicator is on.
• When there is no current output, the water cooler will stop working aer 15 minutes and the
work indicator will be o.
3. The cooler control fuse is located on the rear panel of the power source and is fuse rated of 5A.
4. Output (supply): This quick connector socket has a blue base and is used to connect to the water
supply hose of the TIG torch quick connect plug (the TIG torch’s blue quick connector or it may be
labelled water supply hose).
5. Input (return): This quick connector socket has a red base and is used to connect the return water
cooling hose of the TIG torch, this may be an extension of the power cable hose of the torch as this
hose carries the returning ’hot’ water from the torch via a dinse adaptor connected to the ’-’ dinse
socket. See page 17 for connecon layout.
6. The cooler output socket is located on the rear panel of the power source and the
socket pins are as follows:
Pin1 and Pin2 are the 230V AC output terminals of the water tank.
Pin3 and Pin4 are the error signal input terminals of the water cooler.
Control ON/OFF switch
Work indicator Coolant input
Coolant output
Coolant ller cap
Coolant level

17
INSTALLATION
Unpacking
Check the packaging for any signs of damage.
Carefully remove the machine and retain the packaging unl the installaon is complete.
Locaon
The machine should be located in a suitable posion and environment. Care should be taken to avoid
moisture, dust, steam, oil or corrosive gases.
Place on a secure level surface and ensure that there is adequate clearance around the machine to
ensure natural airow.
Input connecon
Before connecng the machine you should ensure that the correct supply is available.
Details of the machine requirements can be found on the data plate of the machine or in the technical
parameters shown in the manual.
The equipment should be connected by a suitably qualied competent person. Always ensure the
equipment has a proper grounding.
Never connect the machine to the mains supply with the panels removed.
Output connecons
Electrode polarity
In general when using manual arc welding electrodes the electrode holder is connected to the posive
terminal and the work return to the negave terminal.
"+" output terminal: For MMA connect the electrode holder
"-" output terminal: For MMA connect the work return lead
Always consult the electrode manufacturer’s data sheet if you have any doubts.
When using the machine for TIG welding the TIG torch should be connected to the negave terminal and
the work return to the posive terminal.
"+" output terminal: For TIG connect the work return lead
"-" output terminal: For TIG connect the TIG torch
Gas connecons
Connect the gas hose to the regulator/owmeter located on the shield gas cylinder and connect the
other end to the machine.
Please Note:
Check these power
connecons daily to
ensure they have not
become loose
otherwise arcing may
occur when used
under load.
Generic library picture

18
INSTALLATION
MMA welding
Insert the cable plug with electrode holder into the “+” socket on the front panel of the welding machine
and ghten it clockwise.
Insert the cable plug of the work return lead into the “-” socket on the front panel of the welding machine
and ghten it clockwise. Example shown below:
TIG welding
Insert the cable plug with the work clamp into the “+” socket on the front panel of the welding machine
and ghten it clockwise.
Insert the cables plug of the TIG torch into the “-” socket on the front panel of the machine and ghten
clockwise. Connect the gas quick connector into the outlet on the machine front.
Connect the torch switch plug into the socket on the front panel.
Connect the gas hose to the regulator/owmeter located on the shield gas cylinder and connect the
other end to the machine. Example shown below:
Please Note:
Before starng any welding acvity ensure that you have suitable eye protecon, protecve clothing
and all required PPE. Also take the necessary steps to protect any persons within the area.

19
OPERATION - MMA
Before starng any welding acvity ensure that you have suitable eye protecon and
protecve clothing. Also take the necessary steps to protect any persons within the welding
area.
MMA welding mode
MMA (Manual Metal Arc), SMAW (Shielded Metal Arc Welding) or just Sck Welding.
Sck welding is an arc welding process which melts
and joins metals by heang them with an arc
between a covered metal electrode and the work.
Shielding is obtained from the electrode outer
coang, oen called ux. Filler metal is primarily
obtained from the electrode core.
The electrodes outer coang called ux assists in
creang the arc and provides a shielding gas on
cooling forms a slag covering to protect the weld
from contaminaon.
When the electrode is moved along the work piece
at the correct speed the metal core deposits a
uniformed layer called the weld bead.
MMA operaon steps
Aer connecng the welding leads as detailed you will need to
switch the power switch on the back panel of the machine to “ON”.
Select MMA mode by pressing the welding mode selecng key unl
the MMA LED illuminates and MMA can be carried out.
There is now welding voltage output at both output terminals.
Please Note:
THE VRD indicator is now ON to inform you that the output voltage is set to <12V DC.
The digital display meter will now be showing a pre-set welding current and rotang the control dial will
increase or decrease the value.
The TIG300P also features hot start and arc force to ensure that you obtain the best MMA welding
results according to your welding applicaon, please see the following page which describes these
welding parameters.

20
OPERATION - MMA
Before starng any welding acvity ensure that you have suitable eye protecon and
protecve clothing. Also take the necessary steps to protect any persons within the welding
area.
MMA operaon steps
MMA welding current
Select the welding current seng funcon by pressing
the MMA welding parameter selecng key and welding
current in MMA can be set. The current parameter range
is 20~210 amps and is adjusted via the adjustment knob
and the pre-set amperage is indicated on the front panel
digital display.
The Welding current seng can be carried out during welding.
MMA hot start
Select the hot start seng funcon by pressing the
welding parameter selecon key unl the hot start LED
Illuminates. The hot start parameter range is 0~60amps
and is adjusted via the adjustment knob and the
and the hot start addional amperage is indicated on the
front panel digital display.
The Hot start amperage seng can be carried out during welding.
MMA arc force
Select the arc force seng funcon by pressing the
welding parameter selecon key unl the arc force LED
Illuminates. The arc force parameter range is 0~60amps
and is adjusted via the adjustment knob and the
and the arc force addional amperage is indicated on the
front panel digital display.
The arc force amperage seng can be carried out during welding.
If the secondary cables (welding cable and earth cable) are long, select cable with larger cross-secon to
reduce the voltage drop.
Please ensure to check that you have the electrode polarity correct to your chosen electrode and that you
set the pre-set output amperage correctly for the electrode being used.
MMA welding electrodes vary
depending on material, work piece
thickness, welding posion and
joint form.
Pre-set the welding current
according to the type and size of
the electrode, clip the electrode
and then welding can be carried
out by short circuit arc ignion.
For welding parameters, please
refer to the opposite table.
Electrode Diameter
(mm)
Recommended Welding
Current (A)
Recommended Welding
Voltage (V)
1.0 20 ~ 60 20.8 ~ 22.4
1.6 44 ~ 84 21.76 ~ 23.46
2.0 60 ~ 100 22.4 ~ 24
2.5 80 ~ 120 23.2 ~ 24.8
3.2 108 ~ 148 24.32 ~ 24.92
4.0 140 ~ 180 24.6 ~ 27.2