NewArc RT2000 Quick start guide

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Operational Manual
NA9910303
Newarc RT2000

2RT2000
WEEE Directive & Product Disposal
At the end of its serviceable life, this product should not be treated as household
or general waste. It should be handed over to the applicable collection point for
the recycling of electrical and electronic equipment, or returned to the supplier for
disposal.
Place and Date
Newcastle upon Tyne, UK
14/06/2016
DECLARATION OF CONFORMITY
The Low voltage Directive 2014/35/EU
The EMC Directive 2004/108/EC, entering into force 20 July 2007
The RoHS Directive 2011/65/EU, entering into force 2 January 2013
Type of Equipment
Welding power source for TIG, MMA
Brand name or trade mark
Newarc
Type designation etc.
RT2000
Manufacturer or his authorised representative established within the EEA
Name, address, telephone no
Newarc
Newcastle upon Tyne
Phone: [phone]
The product has been designed to comply with the following harmonised standards:
IEC 60974-1 - Arc welding Equipment Arc striking and stabilizing devices
EN 60974-10 - Arc Welding Equipment Electromagnetic compatibility
Additional information: restrictive use, Class A equipment, intended for use in locations other than residential
We declare that the equipment named above has been designed to comply with the relevant sections of the
above referenced specications. The unit complies with applicable essential requirements of the directives.

Safety Guidelines
These general safety guides cover both arc welding machines and plasma cutting machines unless
otherwise noted. 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. Operators should respect the safety of other persons.
Prevention against electric shock
The equipment should be installed by a qualified person and in accordance with current standards in
operation. It is the user’s responsibility to ensure that the equipment is connected to a suitable power
supply. Consult with your utility supplier if required. If earth grounding of the work piece is required,
ground it directly with a separate cable. Do not use the equipment with the covers removed. Do not
touch live electrical parts or parts which are electrically charged. Turn off all equipment when not in use.
Cables (both primary supply and welding) should be regularly checked for damage and overheating.
Do not use worn, damaged, under sized or poorly jointed cables. Ensure that you wear the correct
protective clothing, gloves, head and eye protection. Insulate yourself from work and ground using
dry insulating mats or covers big enough to prevent any physical contact with the work ground. Never
touch the electrode if you are in contact with the work ground, or another electrode from a different
machine.
Do not wrap cables over your body. Ensure that you take additional safety precautions when you are
welding in electrically hazardous conditions such as damp environments, wearing wet clothing, and
metal structures. Try to avoid welding in cramped or restricted positions. Ensure that the equipment
is well maintained. Repair or replace damaged or defective parts immediately. Carry out any regular
maintenance in accordance with the manufacturer’s instructions.
Safety against fumes and welding gases
Locate the equipment in a well-ventilated position. Keep your head out of the fumes. Do not breathe
the fumes. Ensure the welding zone is in a well-ventilated area. If this is not possible, provision should
be made for suitable fume extraction. If ventilation is poor, wear an approved respirator. Read and
understand the Material Safety Data Sheets (MSDS’s) and the manufacturer’s instructions for metals,
consumable, coatings, cleaners, and de-greasers. Do not weld in locations near any de-greasing,
cleaning, or spraying operations. Be aware that heat and rays of the arc can react with vapours to form
highly toxic and irritating gases. Do not weld on coated metals, unless the coating is removed from the
weld area, the area is well ventilated, and while wearing an air-supplied respirator. The coatings on many
metals can give off toxic fumes if welded.
Prevention against burns and radiation
Arc rays from the welding process produce intense, visible and invisible (ultraviolet and infrared) rays
that can burn eyes and skin. Wear an approved welding helmet fitted with a proper shade of filter 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
protective screens or barriers to protect others from flash, glare and sparks from the welding area. Ensure
that there are adequate warnings that welding or cutting is taking place.
3
RT2000

Wear suitable protective flame resistant clothing. The sparks and spatter from welding, hot work pieces,
and hot equipment can cause fires and burns. Welding on closed containers, such as tanks, drums, or
pipes, can cause them to explode. Accidental contact of electrode to metal objects can cause arcs,
explosion, overheating, or fire. Check and be sure the area is safe and clear of inflammable material
before carrying out any welding.
Protection against noise
Some welding and cutting operations may produce noise. Wear safety ear protection to protect your
hearing.
Protection from moving parts
When the machine is in operation, keep away from moving parts such as motors and fans. Moving
parts, such as the fan, may cut fingers and hands and snag garments. Protections and coverings may
be removed for maintenance and controls only by qualified personnel, after first disconnecting the
power supply cable. Replace the coverings and protections and close all doors when the intervention
is finished, and before starting the equipment. Take care to avoid getting fingers trapped when loading
and feeding wire during set up and operation. When feeding wire be careful to avoid pointing it at other
people or toward your body. Always ensure machine covers and protective devices are in operation.
Precautions against fire and explosion
Avoid causing fires due to sparks and hot waste or molten metal. Ensure that appropriate fire safety
devices are available near the cutting / welding area. Remove all flammable and combustible materials
from the cutting / welding zone and surrounding areas. Do not cut/weld fuel and lubricant containers,
even if empty. These must be carefully cleaned before they can be cut/welded. Always allow the cut/
welded material to cool before touching it or placing it in contact with combustible or flammable
material. Do not work in atmospheres with high concentrations of combustible fumes, flammable gases
and dust. Always check the work area half an hour after cutting to make sure that no fires have begun.
Risks due to magnetic fields
The magnetic fields created by high currents may affect the operation of pacemakers or electronically
controlled medical equipment. Wearers of vital electronic equipment should consult their physician
before beginning any arc welding, cutting, gouging or spot welding operations. Do not go near welding
equipment with any sensitive electronic equipment as the magnetic fields may cause damage.
RF Declaration
Equipment that complies with directive 2004/108/EC concerning electromagnetic compatibility (EMC)
and the technical requirements of EN60974-10 is designed for use in industrial buildings and not those
for domestic use where electricity is provided via the low voltage public distribution system. Difficulties
may arise in assuring class A electromagnetic compatibility for systems installed in domestic locations
due to conducted and radiated emissions. In the case of electromagnetic problems, it is the
responsibility of the user to resolve the situation. It may be necessary to shield the equipment and fit
suitable filters on the mains supply.
4RT2000

5
LF Declaration
Consult the data plate on the equipment for the power supply requirements. Due to the elevated
absorbency of the primary current from the power supply network, high power systems affect the
quality of power provided by the network. Consequently, connection restrictions or maximum
impedance requirements permitted by the network at the public network connection point must be
applied to these systems. In this case the installer or the user is responsible for ensuring the equipment
can be connected, consulting the electricity provider if necessary.
Materials and their disposal
The equipment is manufactured with materials, which do not contain any toxic or poisonous
materials dangerous to the operator. When the equipment is scrapped, it should be dismantled
separating components according to the type of materials. Do not dispose of the equipment with
normal waste. The European Directive 2002/96/EC 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 compatible recycling facility.
Handling of compressed gas cylinders and regulators
All cylinders and pressure regulators used in welding operations 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. Never deface or alter any cylinder.
The following signs and explanations are to remind the user of the potential
risks involved and the dangers of misuse or mistreatment of the welding
machine.
!
RUNNING PARTS MAY BE DANGEROUS!
Keep away from running components,
including the fan.
BE AWARE OF SPARKS AND SPATTER
Wear protective clothing, such as leather
gloves, Flame retardant overalls, boots and
eyewear.
DO NOT TOUCH THERMAL COMPONENTS!
Thermal components may cause severe burns
when in contact with unprotected skin.
ELECTRIC SHOCKS CAN KILL!
Never touch electrical parts. Keep the
equipment in good condition, replace
damaged parts, undertake regular
maintenance according to the instructions.
RT2000

1. Preface 7
1.1 General 7
1.2 Introduction 8
1.3 Technical Specications 9
1.4 Overview of Machine 10
2. Installation 12
3. Operation 13
4. Fault Finding 14
4.1 Welding Problems 15
5. Maintenance 16
6. Warranty 17
7. Parts 18
Contents
6RT2000

7
1. Preface
Congratulations on choosing your Newarc RT2000 Inverter.
Used correctly, our products can signicantly increase the productivity of your welding, and provide
years of economical service. This operating manual contains important information on the use,
maintenance and safety of your Newarc product. Please read the manual carefully before using the
equipment for the rst time. For your own safety and that of your working environment, pay particular
attention to the safety instructions in the manual.
For more information on Newarc products, contact an authorised Newarc dealer, or visit the Newarc
website at www.newarc.co.uk. The specications presented in this manual are subject to change without
prior notice.
Important notes
Items in the manual that require particular attention in order to minimise damage and personal harm
are indicated with the ’NOTE!’ notation. Read these sections carefully and follow the instructions.
Disclaimer
While every effort has been made to ensure that the information contained in this guide is accurate and
complete, no liability can be accepted for any errors or omissions. We reserve the right to change the
specication of the product described at any time without prior notice. Do not copy, record, reproduce
or transmit the contents of this guide without prior permission.
1.1 General
RT2000

1.2 Introduction
The RT2000 is a 200 amp (150 amp on MMA) constant current TIG welding machine based on IGBT
technology. The inverter drive circuitry operates above the audio frequency spectrum making the
RT2000 virtually silent in operation.
The high operational frequency also means that the RT2000 is able to respond quickly to changing arc
dynamics, making for a very smooth stable arc.
As well as TIG welding the RT2000 is capable of MMA welding with all types of electrodes within the
current rating of the machine, normally up to 4mm. The RT2000 is available in three versions, a 230v
only, a 110v only and a 115/230v auto switching Dual Voltage version.
You may select either HF or contact ignition and 2T or 4T torch switch operation. The unit has an
excellent duty cycle in high ambient temperatures, and is designed to meet all types of environmental
conditions. It is ideal for production, site and maintenance applications.
#
Features
• TIG DC Welding
• Pre and post gas ow
• Adjustable slope up and down timing
• HF or Contact Ignition
• 2T or 4T torch switch operation
• Digital current display
• Protected against overload and short circuits
• Robust external casing to meet harsh operating conditions
• Extremely good duty cycle in high ambient temperatures
8RT2000

Supply Current
Mains Input Fuse
Mains Cable
Output Current Range
Duty Cycle at 40ºC
Insulation Class
Degree of Protection
Dimensions (L x W x H) (mm)
1.3 Technical Specications
9
Newarc TS2000
Power voltage (V) 230 volts single phase (230V, or DV version)
115 volts single phase (115V or DV version)
Power Consumption 5.1 KVA
230v
115v
230v
115v
19
115v
TIG
MMA
TIG
MMA
420 x 150 x 350
F
IP21
Weight (kg)
RT2000
27.5 amps
44 amps
28 amp s slow blow or type C MCB
45 amps slow blow or type C MCB
230v 3 x 2.5mm² exible cable
3 x 4mm² exible cable
5-200 amps
5-150 amps
60%
100%

1.4 Overview of Machine
10
Front View
Power source front panel layout
1. On-Off switch
2. Current control
3. Slope up control
4. Arc-force control
5. Digital display
6. Lift/Spark start selector switch
7. Thermal cut-out indicator
8. Power/Gas outlet connector
9. TIG torch switch connector
10. Slope down control
11. Mode switch
12. Remote control socket
13. Negative weld out connector.
14.Positive weld out connector
RT2000
7
SECTION 4 — OPERATION
4.1 Operational Controls and Connec-
tions
4.2 Description of controls
1 On-Off switch
Switches the machine on and off. Upon switching on the
overload indicator will light and the machines output will be
inhibited, after 15 seconds the overload indicator will extin-
guish and the machine is ready for use.
Note: Post gas time. For a 5 seconds period after switching
on the post gas value is displayed as P# (The # value is the
set post-gas time) with the possibility to change the post-gas
time by repeatedly pressing the torch switch button. Every
torch switch press the post gas time is incremented by 1
second (from 0-30 seconds).
This setting is saved therefore it does not need re-setting
each time the machine is switched on.
2 Current control
Use this to set the output current of the RT2000.
3 Slope up control
With the slope up control set to minimum the RT2000 will
strike at the current set by the current control. With the slope
up control set to anywhere but minimum the RT2000 will
strike at 5A and then gradually increase the current to the
setting on the current control, the time this takes is deter-
mined by the position of the slope up control.
4 Arc-force control
Operates in MMA mode only. This control alters the welding
dynamics of the machine to facilitate welding with different
types of welding electrodes (e.g. general purpose, celulosic,
low hydrogen and iron powder). Turning towards maximum
will increase penetration at the expense of increased weld-
ing splatter, turning towards minimum will reduce penetra-
tion but the arc will be smoother and less fierce.
5 Digital display
Gives an accurate indication of the welding current.
Displays HU (High voltage) when HF spark start is activated.
Display the set value of post-gas P#. The display also displays
the setting values of slope up & slope down when been ad-
justed.
6 Lift/Spark start selector switch
Switches the machine into either 'HF start' or 'lift TIG' opera-
tion. In HF start the arc is initiated by a high voltage spark at
the Tungsten's tip. In lift TIG touch the Tungsten to the work-
piece, press the torch switch then lift the Tungsten to the
welding position, the arc will initiate.
7 Thermal cut-out indicator
Indicates that the thermal cut-out in the machine has oper-
ated. (see paragraph 5.1 in the fault finding and mainte-
nance section for possible reasons).
8 Power/Gas outlet connector.
For connection of a TIG torch with a combined power and
gas lead. If a TIG torch with a separate power lead and gas
hose is used, an adapter must be used to connect to this
outlet.
9 TIG torch switch connector.
For connecting the TIG torch switch lead.
10 Slope down control.
With the slope down control set to minimum the current will
shut down immediately the torch switch is released.
With the slope down control set to anywhere but minimum
and the torch switch released, the current will gradually de-
crease from the setting on the current control to 5 amps,
whereby the current will extinguish, the time this takes is de-
termined by the position of the slope down control.
11 Mode switch
This control switches the RT2000's welding mode.
MMA sets the machine in MMA mode.
TIG 2s sets the machine in 'normal' TIG mode, whereby press-
ing the TIG torch switch initiates the arc and releasing it will
extinguish the arc (at the end of any slope down period set).
TIG 4s sets the machine in 'latch' TIG mode, whereby pressing
the torch switch and releasing it initiates the arc, pressing and
releasing it again will extinguish the arc (at the end of any
slope down period set).
Note: Post gas time. When switching from MMA to TIG modes
For a 5 seconds period after switching modes the post gas
value is displayed as P# (The # value is the set post-gas time)
with the possibility to change the post-gas time by repeatedly
pressing the torch switch button. Every torch switch press the
post gas time is incremented by 1 second (from 0-30 sec-
onds).
This setting is saved therefore it does not need re-setting each
time the machine is switched on.
12 Remote control socket
For connecting external remote control units, these are the
RC300 remote control, the RPC300 pulse unit and the RFP300
foot pedal. There is no switch for remote operation, plugging
an external unit into the socket automatically selects remote
operation and disables the internal current control.
13 Negative weld out connector.
Main welding power output connector, negative polarity.
14 Positive weld out connector
RT2000
1. On-O switch
Switches the machine on and off. When switching on the overload indicator will light and the machines
output will be inhibited, after 15 seconds the overload indicator will extinguish and the machine ready for use.
Note: Post gas time. For a 5 seconds period after switching on the post gas value is displayed as P# (The
# value is the set post-gas time) with the possibility to change the post-gas time by repeatedly pressing
the torch switch button. Every torch switch press the post gas time is incremented by 1 second (from 0-30
seconds). This setting is saved therefore it does not need re-setting each time the machine is switched on.
2. Current control
Use this to set the output current of the RT2000.
3. Slope up control
With the slope up control set to minimum the RT2000 will strike at the current set by the current control. With
the slope up control set to anywhere but minimum the RT2000 will strike at 5A and then gradually increase
the current to the setting on the current control, the time this takes is determined by the position of the slope
up control.

11
4. Arc-force control
Operates in MMA mode only. This control alters the welding dynamics of the machine to facilitate welding
with different types of welding electrodes (e.g. general purpose, celulosic, low hydrogen and iron powder).
Turning towards maximum will increase penetration at the expense of increased welding splatter, turning
towards minimum will reduce penetration but the arc will be smoother and less erce.
5. Digital display
Gives an accurate indication of the welding current. Displays HU (High voltage) when HF spark start is
activated. Display the set value of post-gas P#. The display also displays the setting values of slope up & slope
down when been adjusted.
6. Lift/Spark start selector switch
Switches the machine into either ‘HF start’ or ‘lift TIG’ operation. In HF start the arc is initiated by a high voltage
spark at the Tungsten’s tip. In lift TIG touch the Tungsten to the workpiece, press the torch switch then lift the
Tungsten to the welding position, the arc will initiate.
7. Thermal cut-out indicator
Indicates that the thermal cut-out in the machine has operated.
8. Power/Gas outlet connector
For connection of a TIG torch with a combined power and gas lead. If a TIG torch with a separate power lead
and gas hose is used, an adapter must be used to connect to this outlet.
9. TIG torch switch connector
For connecting the TIG torch switch lead.
10. Slope down control
With the slope down control set to minimum the current will shut down immediately the torch switch is
released. With the slope down control set to anywhere but minimum and the torch switch released, the
current will gradually decrease from the setting on the current control to 5 amps, whereby the current will
extinguish, the time this takes is determined by the position of the slope down control.
11. Mode switch
This control switches the RT2000’s welding mode. MMA sets the machine in MMA mode. TIG 2s sets the
machine in ‘normal’ TIG mode, whereby pressing the TIG torch switch initiates the arc and releasing it will
extinguish the arc (at the end of any slope down period set). TIG 4s sets the machine in ‘latch’ TIG mode,
whereby pressing the torch switch and releasing it initiates the arc, pressing and releasing it again will
extinguish the arc (at the end of any slope down period set).
12. Remote control socket
For connecting external remote control units, these are the RC300 remote control, the RPC300 pulse unit
and the RFP300 foot pedal. There is no switch for remote operation, plugging an external unit into the socket
automatically selects remote operation and disables the internal current control.
13. Negative weld out connector.
Main welding power output connector, negative polarity.
14. Positive weld out connector
RT2000

12 RT2000
2. Installation
Unpacking
Check the packaging for any signs of damage. Carefully remove the machine and retain the packaging
until the installation is complete.
Positioning of the machine
Place the machine on a rm, dry and level surface. Where possible, do not allow dust or other impurities
to enter the machines cooling air ow. Preferably site the machine above oor level; for example on a
suitable carriage unit.
Notes for positioning the machine
• Make sure there is at least 20cm clearance at the front, rear and sides of the machine to allow good
circulation of the cooling air.
• Ensure that the machine is positioned in such a way that particles created by grinding and cutting
operations do not enter the machine.
NOTE! Protect the machine from heavy rain and if used in hot climates, against direct sunlight.
WARNING! All electric shocks are potentially fatal, a competent electrician should under-take the tting
of the mains plug.
Input connection
The Dual Voltage version of the machine is tted with circuitry that ‘senses’ the mains voltage it is
connected to and automatically congures the machine. This requires no changing of tapping points
inside the machine or intervention on the operators part, just t the relevant type of mains plug for the
supply the machine is to be used on.
Assure that the mains supply is of the correct voltage and current capability for the machine. Make sure
that the mains cable and any extension cables used are of sufficient current carrying capacity.
Check the mains plug and socket (if tted) are in good condition. If the machine is wired directly to the
mains supply then an isolator switch must be tted.
Primary cable length
Long extension cable lengths may reduce the performance of the machine, the welding arc may
become unstable especially at higher currents. Ensure the mains cable is not coiled up when you
are welding as this will reduce the input voltage to the machine and may cause overheating and
degradation of the cable.

13
MMA Welding
• For straight polarity welding, connect the electrode holder to the positive weld terminal
and the earth return lead to the negative weld terminal. For reverse polarity welding, reverse
these connections.
• Turn the mode switch to ‘MMA’, the machine is now in MMA mode.
• Turn the mains switch to the on position, the digital display and the overload indicator will
light. After approximately 15 seconds the overload indicator will extinguish and the machine
is ready to weld.
• While reading the digital display, adjust the current control to the recommended setting
for the size and type of welding electrode to be used.
• When welding, adjust the Arc-force control to achieve the arc condition you require.
• The RT2000 is suitable for welding all types of electrodes within the current rating of the
machine, normally up to 3.2 or 4mm depending on the type of rod.
The RT2000 should never be used with arc-air gouging or cutting electrodes.
TIG Welding
• Connect a hose suitable for use with pure Argon at a pressure of up to 10 bar (150psi) between
the regulator on the gas cylinder and the gas in connection on the rear panel of
the machine. Turn the gas cylinder valve and the regulator on and adjust the regulator to
give a working pressure between 3 and 5 bar. (see page 4 for more information).
• Connect the TIG torch power/gas lead to the TIG torch power/gas connector and the
switch lead to the torch switch socket.
• Connect the earth return lead to the +ve weld terminal.
• Turn the mode switch to ‘2s’ or ‘4s’.(see relevant paragraph in section 4.2 Description of
controls for more information on the setting of this control).
• Turn the Up slope and Down slope controls to the settings required. (see relevant paragraph
in section 4.2 Description of controls for more information on the setting of this control).
• Turn the on/off switch to the on position, the digital display and the overload indicator will
light up. After approximately 15 seconds the overload indicator will extinguish and the
machine is ready to weld.
• While reading the digital display,
3. Operation
RT2000

14 RT2000
Machine operation
Most problems with the operation of the RT2000 can be overcome by following the procedures below.
No digital display on switch on
Check that the machine is attached to a working mains supply, that it is correctly plugged in and
any isolator switches are turned on. Have a competent electrician check that there are no fuses or
overload devices interrupted, that the mains plug is tted correctly and that there are no loose wires or
connections, check that there are no breaks in the mains cable. If all the above appear satisfactory have
a competent maintenance engineer check the fuses inside the machine. The relevant one in this case is
on the TIG control PCB. This PCB is located at the top left hand side of the machine. The fuse is located
on the bottom of the PCB towards the rear of the machine. The fuse rating is 2 amp.
Digital display lit but no output on MMA.
Make sure the mode switch is in the MMA position. Ensure that the overload indicator goes off after
15 seconds. If all the above appear satisfactory, have a competent maintenance engineer check the
fuses inside the machine. The relevant one is on the Main control PCB. This PCB is located at the top right
hand side of the machine. The fuse is located on the top of the PCB halfway along its length.
Output on MMA but not on TIG.
Check to see if gas ows when the torch switch is pressed, if not, check that the torch switch lead is in
good condition, that there are no breaks in the cable and the wires in the plug and torch switch are still
securely attached. Check that the torch switch plug is connected properly. If gas ow is present, check
the machine works in ‘lift TIG’ mode to determine whether the problem is in the TIG welding mode or
that just the HF is not working.
No HF operation.
Have a competent maintenance engineer check the fuse on the HF PCB. This PCB is located in
the ‘U’ channel on the top of the machine. The fuse is located near the top of the PCB toward the
front of the machine.
Thermal cut-out indicator lit
This indicator must be off for normal operation. If on it indicates that the RT2000 has overheated and
the power stages of the RT2000 have been shut down so you will get no current output.
In normal climate conditions (below 25°C) the RT2000 has a 100% duty cycle, so operation of the
thermal cut out indicates that the inside of the machine is likely choked with dust and therefore not
being cooled properly. In Hot climates (above 25°C) It indicates that you are exceeding the duty cycle of
the RT2000, leave switched on for a few minutes and the RT2000 will return to normal operation. In this
circumstance, do not switch the RT2000 off as this will stop the operation of the cooling fan and greatly
extend the cool down period. Frequent tripping of the thermal cut-out, especially at low current settings
is indicative that the inside of the machine is probably choked with dust.
Any operating problems not covered above means the RT2000 must be checked by a
trained Newarc service engineer or returned to the factory for repair.
4. Fault nding

15
MMA Welding Problems
If problems with the RT2000s operation while MMA welding are experienced, rst refer to the
information in paragraphs 3.2 in the installation section, paragraph 4.3.1 in the operating section and the
fault nding procedure earlier in this section. Most problems with the MMA welding procedure are the
result of not setting the correct welding parameters for the welding rod being used. All welding rod
packets have information on them in symbolic format , giving suitable current range, polarity and
type of weld (normally called ‘position’). If you are in doubt about what these symbols mean, ask your
welding rod supplier to explain them. Choose an initial current setting towards the middle of the quoted
range and if necessary practice on a piece of waste material the same type and thickness as the job
to be welded.
TIG Welding problems
If problems with the RT2000s operation while TIG welding are experienced, rst refer to the information
in paragraphs 3.2 in the installation section, paragraph 4.3.2 in the operating section and the fault
nding procedure earlier in this section. The common problems with TIG welding are poor striking,
porosity and poor appearance of the weld. If you are experiencing any problems with TIG welding follow
the check list below, this will cure most problems:
• If the RT2000 is suffering from poor striking, check that all power leads are connected properly, check
that there is sufficient gas ow and that the correct gas is being used, check that the earth clamp is
making a good connection to the work-piece.
• If there is porosity in the weld or the nal weld is of poor appearance, check that there is sufficient
gas ow and that the correct gas is being used, check the condition of the TIG torch, particularly the
gas hose. Make sure that the collet or gas lens in the torch head is not blocked in anyway. Check all
gas connections are secure and that there are no leaks, use a leak detecting spray on all connections if
necessary. Any welding problems not covered above must be brought to the attention of a qualied
Welding Engineer.
if the problem still persists have the RT2000 checked by a trainedNewarc service engineer.
4.1 Welding problems
RT2000

16 RT2000
5. Maintenance
Note!
All Electric shocks are potentially fatal, switch the machine off and disconnect from the power supply
before undertaking out any maintenance work.
It is very important that the RT2000 is regularly maintained. The amount of use and the working
environment must be taken into account when scheduling the maintenance periods. Careful use and
regular preventative maintenance will prolong the life of the machine and ensure trouble free operation.
Weekly
• Clean the exterior of the machine.
• Inspect the machines exterior for obvious signs of damage.
• Check the condition of the welding cable, earth clamp, welding output and power in connectors for
damage and any sign of over-heating.
• Check the condition of the mains lead and plug.
Three monthly
As per the weekly schedule, plus:-
• Remove the side covers from the machine. Remove the build up of dust and debris from inside the
machine, particularly from the Heat-sink extrusion, by use of either compressed air at reduced pressure
or an industrial type vacuum cleaner.
• Make a thorough visual inspection of the interior of the machine, look particularly for pieces of welding
wire, or stubs of old welding rods that may have got through the cooling air intakes.
• Check the condition of the welding output connectors, look for any signs of discoloration. This could be
an indication of overheating and can be a cause of welding set failure.
Annually
As per the three monthly schedule, plus :-
• Have the machines calibration checked, if necessary have the machine re-calibrated by a Newarc
trained technician.

17
6. Warranty
Guarantee
Newarc Ltd warrants that its goods and services are guaranteed to meet the specic performance under
the stated conditions of use. Newarc cannot be held responsible for general wear and tear or for failure
occurring due to misuse or abuse arising out of circumstances outside the stated condi-tions of use.
The stated conditions of use are that considered normal industrial practice and are not exhaustive. Each
machine is identied with a unique serial number and accompanied with the guarantee. Newarc reserve
the right to a) Repair. b)Replace. c)Authorise the reasonable cost of repair or replacement at an approved
Newarc service agent. d)Credit for any purchased equip-ment (less reasonable depreciation for actual
use and condition) at its entire discretion. This in no way affects your rights as a consumer. The guarantee
is enclosed with each machine.
RT2000

18
7. Parts
RT2000
RT2000
11
6.1 Parts Locations
SECTION 6 — PARTS BREAKDOWN

19
Item Part number
Cooling fan (230Vac) NAM00311A
Diode modules (behind bracket) (2 per machine) NAM60121
200A Shunt NAM00309NC
Secondary Inductor NAM90133
Plastic feet (4 per machine) NAM00096
Auxiliary transformer
Diode Bridge (2 per machine) NAM60079
Main Transformer NAM90136B
NAM00305C
Main Power PCB 230V model only NAM90125/1
Main Power PCB 110V & Dual voltage models NAM90148/1
Control PCB NAM90127-RT2000
Thermostat NAM00332/80
Gas solenoid valve NAM00024A
HF PCB
HF Inductor NAM90544
IGBT Module NAM60074
NAM90193-RT2000
TIG PCB NAM90132/New-RT2000
Auto-switching PCB (Dual voltage model only) NAM90691
Digital display assembly NAM90003-RT2000
Control/switch PCB NAM90080-RT2000
Arc force control potentiometer NAM20099
Control knobs (5 per machine)
Lift/HF selector switch NAM70057
Rocker switch NAM70069A
NAM00033A
TIG torch power/gas connector NAM00041
TIG torch switch socket assembly NAM90098/NEWTIG
Panel mount Dix type socket (2 per machine) EW3550PSW
24v relay (dual voltage model only) NAM70026
2 amp, 20mm fuse links (Quick blow)
Remote control socket assembly NAM90130
NAM00274
Description
Ordering information
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27 & 28
29
Misc
RT2000

20 www.newarc.co.uk
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Newcastle upon Tyne NE15 6LN
Tel: [phone]| Email: [email protected] | www.newarc.co.uk