Paton MultiPRO Series Instruction Manual

- 1 - PATON MultiPRO series DC MMA/TIG/MIG/MAG

PATON MultiPRO series DC MMA/TIG/MIG/MAG - 2 -

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CONTENTS
1. General provisions
5
2. Start‐up
9
2.1 Intended use
9
2.2 Installation requirements
9
2.3 Power connection
10
2.4 Mains plug connection
10
3. Manual metal arc welding with a stick electrode (MMA welding)
11
3.1 Welding cycle –ММА
11
3.2 Hot Start function
12
3.3 Arc Force function
12
3.4 Anti‐Stick function
13
3.5 Function of slope adjustment for a current‐voltage curve
14
3.6 Short arc welding function
14
3.7 Function of an open‐circuit voltage reduction unit
14
3.8 Pulsed current welding function
14
4. Tungsten arc inert gas welding (TIG)
16
4.1.1 Welding cycle –TIG-LIFT
16
4.1.2 TIG‐LIFT arc striking function
18
4.2.1 Welding cycle –TIG-2T
18
4.2.2 Function of button on a TIG‐2T torch
20
4.3.1 Welding cycle –TIG-4T
20
4.3.2 Function of button on a TIG‐4T torch
22
4.4 Function of pre‐purging with shielding gas
22
4.5 Preheating current (pilot arc) function
22
4.6 Arc current fade‐in function
23
4.7 Arc current fade‐out function
23
4.8 Crater filling current function
23
4.9 Function of post‐purging with shielding gas
23
4.10 Pulsed current welding function
23
5. Semiautomatic metal inert/active gas welding (MIG/MAG)
25
5.1.1 Welding cycle –MIG/MAG-2T
27
5.1.2 Function of button on a 2T torch
27
5.2.1 Welding cycle –MIG/MAG-4T
28
5.2.2 Function of button on a 2T torch and _4Т
28
5.3 Function of pre‐purging with shielding gas
29
5.4 Wire‐feeding speed fade‐in function
29
5.5 Function of voltage fade‐out in the end of welding
29
5.6 Function of post‐purging with shielding gas
30
5.7 Pulsed voltage welding function
30
6. Machine setting
32
6.1 Switching to the required function
32
6.2 Switching to the required welding mode
33
6.3 Reset of all functions settings for the current welding mode
33
7. General list and sequence of functions
33
8. Attendance and technical maintenance
36
9. Generator operation mode
36
10. Storage rules
37
11. Transportation
37
12. Technical specifications
37
13. Delivery set
38
14. Warranty liabilities
38
15. Safety rules
38
16. Acceptance certificate
42

PATON MultiPRO series DC MMA/TIG/MIG/MAG - 4 -
Connection to power mains / power board (at 25ºС):
ATTENTION! Make provision for cables routed in the walls and other extension cords
Electrode used in
MMA mode
Set current value
in MMA and TIG
modes
Wire cross‐section
diameter for
MIG/MAG welding
Phase conductor
cross-section, sq.
mm
Maximum
cable length, m
MultiPRO-250
Ø3 mm
120А at most
Ø0.8 mm at most
1.5
75
2
105
2.5
130
4
205
6
310
Ø4 mm
160А at most
Ø1.0 mm at most
2
75
2.5
95
4
155
6
230
Ø5 mm
Ø6 mm low-
melting
up to 250А
up to Ø1.2 mm
2.5
60
4
100
6
150
MultiPRO-250-400V
Ø3 mm
120А at most
Ø0.8 mm at most
1.5
150
2
210
2.5
260
4
410
6
620
Ø4 mm
160А at most
Ø1.0 mm at most
2
150
2.5
190
4
310
6
460
Ø5 mm
Ø6 mm low-
melting
up to 250А
up to Ø1.2 mm
2.5
120
4
200
6
300

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1. GENERAL PROVISIONS
Digital inverter multifunctional machines PATON MultiPRO-250 and MultiPRO-250-400V are designed for
manual metal arc welding (MMA) and tungsten arc inert gas welding (TIG), as well as for semiautomatic metal
inert/active gas welding (MIG/MAG) in the atmosphere of shielding gas with direct current. Advantageous
completely digital control implemented in the design of the machine provides freedom from limitations typical for
multi‐functional systems based on the analogous control system, which are always inherently geared towards a
specific mode, while other modes are additional and have drawbacks in terms of control. On the contrary, control
board of a completely digital system offers all capabilities of the source within the range of its full power,
regardless of the mode of use. The MultiPRO-series is designed for industrial use. The source can be separated
from the wire‐feeding machine both for convenience and safety practices. What is more, additional adjustments
allow setting the inverter rectifier to optimum settings in different situations. They provide virtually
uninterruptible load duration at full fair rated current, when powered from a powerful 220V single-phase network
or from a three-phase 400V network, which is enough to work with any electrodes from Ø1.6mm down to low-
melting Ø6mm and semiautomatic solid wire welding with a diameter from Ø0.6mm to Ø1.2mm. Initially, the
source is set to settings, which are optimum for most applications, and is quite easy to use if you do not go into
additional details of settings, which require good welder’s skills. For safety in dangerous working conditions, the
rectifier is equipped with an in‐built unit for open‐circuit voltage reduction in MMA mode, which can be enabled or
disabled. The distinctive feature of PATON semi‐automatic machines is very robust, high‐quality, four-roller, and
structurally sound wire feeding mechanism, with all leading rollers, as well as availability of KZ‐2 slot of world
standard EURO type, which allows user changing torches at his/her own discretion. The machines are completed
with all necessary accessories for comfortable work in the modes of manual metal arc welding (MMA), tungsten
arc inert gas welding (TIG), and semiautomatic metal inert/active gas welding (MIG/MAG) in the atmosphere of
shielding gas with direct current.
These MultiPRO models by PATON are equipped with a unit for minute undervoltage protection, as
well as against minute overvoltage.
Due to the increased frequency of voltage supplied to the transformer, the transformer can be made
several tenfolds smaller. That is why weight and overall dimensions of this machine is several times smaller
than those of regular equipment with identical output parameters.
Main advantages:
1. Wide range of welding parameters adjustment:
a) in MMA mode –1 (main) + 7 (additional) + 3 (for pulsed mode)
b) in TIG mode –1 (main) + 7 (additional) + 3 (for pulsed mode)
c) in semiautomatic MIG/MAG mode –2 (main) + 6 (additional) + 3 (for pulsed mode)
2. Adjustable pulsed welding mode for all welding types.
3. In addition to voltage surge protection, the machine is equipped with a stabilization system for large
long‐term voltage variations in the 160V to 260V single‐phase supply mains. But it should be
remembered that at a minimum voltage of 160V, it is possible to conduct welding with an electrode of
not more than Ø3mm or semiautomatic welding with a wire of not more than Ø0.8mm.
4. The machine fits standard domestic power mains. Due to high efficiency factor, the source provides
twice lower power consumption compared to regular sources.
5. Adaptive fan speed, i.e. increases when the machine heats up and slows down when it is cold, thus
prolonging the service life of the fan and reducing the amount of dust accumulated in the machine.
6. Convenient use due to high load duration (LD) at rated current, which enables virtually uninterruptible
welding at rated current and temperature of 25C.
7. Increased machine reliability in dusty production environment, microelectronic circuitry of the source is
located in a separate compartment.
8. All heating elements of the source are provided with an electronic heat protection system.
9. All electronic parts of the machine are impregnated with two layers of high‐quality varnish, which
ensures product reliability during the entire service life.
10. Improved arcing stability.

PATON MultiPRO series DC MMA/TIG/MIG/MAG - 6 -
PARAMETERS
MultiPRO-250
MultiPRO-250-400V
Rated voltage of 50Hz supply mains, V
220
3x400+N
Rated current consumption from the mains, A
32 … 36
10 … 12
Rated arc current, A
250
250
Maximum root‐mean‐square current, A
335
335
Load duration (LD)
70%/at 250А
100%/at 208A
70%/at 250А
100%/at 208A
Mains voltage variation range, V
160–260
±20%
Arc current adjustment range, A
12–250
12–250
Arc voltage adjustment range, A
12–28
12–28
Stick electrode diameter, mm
1.6–6.0
1.6–6.0
Filler wire diameter, mm
0.6–1.2
0.6–1.2
Pulsed welding modes
MMA: 0.2...500Hz
TIG: 0.2...500Hz
MIG/MAG: 5...500Hz
MMA: 0.2...500Hz
TIG: 0.2...500Hz
MIG/MAG: 5...500Hz
Non‐contact arc‐striking unit (high‐frequency injection unit) in
TIG mode
Yes
Yes.
Hot Start in MMA mode
adjustable
adjustable
Arc Force in MMA mode
adjustable
adjustable
Anti‐Stick function in MMA mode
automatic
automatic
Open‐circuit voltage reduction unit
on / off
on / off
MMA open‐circuit voltage, V
12 / 75
12 / 75
Arc striking voltage, V
110
110
Rated power consumption, kVA
6.9 … 7.9
6.9 … 7.9
Maximum power consumption, kVA
11.0
11.0
Efficiency factor, %
90
90
Cooling
forced
forced
Operating temperature range
–25 … +45ºС
–25 … +45ºС
Overall dimensions, mm (length, width, height)
360 х 260 х 270
360 х 260 х 270
Weight, excluding coil and accessories, kg
10.7
10.8
Ingress protection class*
IP21
IP21
*For this series machines, their frame protects them from the ingress of objects more than 5.5mm in
diameter, as well provides rain protection, so that water streaming vertically does not infringe the
machine operation
The recommended length of power welding cables during welding:
Cable length
(one way)
Maximum
current
Cross‐section
area
Cable grade
1…7m
160А at most
16mm2
КГ 1х16
2…9m
200А at most
25mm2
КГ 1х25
3…11m
up to 250А
35mm2
КГ 1х35
ATTENTION! The mains button on the back of the device is not power one, so when
you turn off the device, it does not completely de-energize all the internal
electronics. For this reason, after completing the welding work, disconnect the plug
from the mains, according to the safety requirements.

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PATON MultiPRO series DC MMA/TIG/MIG/MAG - 8 -
1–Digital display of the source.
2–Buttons for incrementation and decrementation of the selected parameter
(by default: in MMA mode—welding current, in TIG mode—welding current,
in MIG/MAG mode—welding voltage).
3–Button for selecting function in the current welding mode.
4–Button for selecting required welding mode:
a) manual metal arc welding with a stick electrode (MMA);
b) tungsten arc inert gas welding (TIG);
c) semiautomatic metal inert/active gas welding (MIG/MAG).
5–Machine operation indicator:
a) permanent green light—during stabilization of source operating mode
and MMA welding;
b) permanent yellow light—in the operator wait mode during tungsten arc
inert gas welding and semiautomatic welding, as well as source
overheating in any mode;
c) blinks green and yellow—while welding in any mode;
d) permanent red light—in case of malfunction;
e) no light—in case of mains voltage rise or drop beyond the normal value.
6–Digital seven-segment display of the wire-feeding machine.
7–The button of wire leading-in (while gas is not supplied).
8–Buttons for adjusting parameters for decreasing and increasing (by default:
wire feeding speed).
9–Button for selecting the functions of the wire-feeding machine.
10 –Shielding gas test button (wire feeding is disabled).
11 –Socket KZ‐2 of EURO type for semiautomatic torch connection.
12 –Plug for power current supply to the wire‐feeding machine.
А–Power current socket “+” of bayonet type:
a) in case of MMA welding—for connection of electrode cable (very
occasionally “mass” cable can be connected, if special electrodes are
used);
b) in case of TIG welding—only “mass” cable is connected;
c) in case of MIG/MAG solid wire welding—a plug is connected internally to
the feeder (by default);
d) in case of semiautomatic MIG/MAG fluxing wire welding—“mass” cable is
connected.
B –Power current socket “–” of bayonet type:

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a) in case of MMA welding –for connection of “earth” cable (very
occasionally electrode cable can be connected, if special electrodes are
used);
b) in case of TIG welding –only argon torch is connected;
c) in case of MIG/MAG solid wire welding –“earth” cable is connected;
d) in case of semiautomatic MIG/MAG fluxing wire welding –“earth” cable is
connected internally to the feeder.
13 –Socket of control buttons on the torch in case of TIG welding.
14 –Socket of shielding gas supply to the torch in case of TIG welding.
15 –The input for leading-in welding wire.
16 –Fitting for shielding gas supply, when using a semiautomatic torch;
17 –Cable for supplying control signals from the wire-feeding machine to the
welding current source.
18–The on / off button of the device (color is decorative).
19 –The coil holder for a wire with a spring braking mechanism.
20 –Fitting for shielding gas supply, when using an argon torch.
2. START‐UP
Attention! Before start-up and commissioning, please read the section
“Safety rules”, Clause 15.
2.1 INTENDED USE
The welding machine is designed solely for manual metal arc welding with a
stick electrode, tungsten arc inert gas welding, as well as semiautomatic metal
inert/active gas welding.
Other use of the machine is considered undue. The manufacturer is not
responsible for damage caused by undue use of the machine.
Intended use of the machine implies adherence to the instructions of this
operating manual.
2.2 INSTALLATION REQUIREMENTS
The welding machine is protected from ingress of foreign solid objects of
more than 5.5mm in diameter.
The welding machine can be placed and operated outdoors. Internal electric
parts of the machine are protected against direct moisture impact, but not against
condensate drops.
ATTENTION! Do not switch the machine off immediately after completion of
welding works in hot weather or intense welding works in any weather conditions!
Electronic parts must be allowed to cool down for 5 minutes.

PATON MultiPRO series DC MMA/TIG/MIG/MAG - 10 -
ATTENTION! When the machine is switched off and cools down after an
operation in cold season, condensate forms inside of it, so do not switch the
machine on again in less than 3...4 hours!!!
Therefore, do not switch the machine off in cold season, if you are going to
switch it on within 4 hours.
The machine must be placed to ensure free inlet and outlet of cooling air
through the vent holes on the front and the rear panels. Take care that metal dust
(for example, during emery grinding) does inhaust directly into the machine by the
cooling fan.
ATTENTION! The machine may be life‐threatening after a hard fall. So
place it on a stable, solid surface.
2.3 POWER CONNECTION
The welding machine of series design is rated for mains voltage of 220V (-
27%+18%) or for three‐phase mains voltage of 3х400V (±20%) with neutral wire.
Attention!All manufacturer’s warranty liabilities become void if the
single‐phase machine MultiPRO-250 is connected to mains voltage exceeding
270V!Such a situation can occur with a very large phase voltage imbalance in a
standard mains or using non-standard connection.
When connecting three‐phase machine MultiPRO-250-400V, manufacturer’s
warranty liabilities become void if the mains line has been connected by mistake to
the neutral wire,as well as when connecting to the mains with large distortions
in the neutral wire.
Mains connector, cross‐sections of power supply cables, and supply‐line fuses
must be selected on the basis of technical specifications of the machine.
2.4 MAINS PLUG CONNECTION
Attention! Mains plug shall correspond to supply voltage and current
consumption of the welding machine (see Technical specifications). In accordance
with safety practices, use a sockets with a guaranteed earthing and in no case do
not use a neutral wire for these purposes!!!

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3. MANUAL METAL ARC WELDING WITH A STICK
ELECTRODE (MMA WELDING)
In this welding mode, the wire-feeding machine is not needed!
Procedure for machine preparation to operation:
- disconnect all cables from the wire feeding mechanism;
‐insert the electrode cable into the source socket А“+”;
‐ insert the “mass” cable into the source socket B “–”;
‐connect the “mass” cable to the work piece;
‐connect the mains plug to the supply mains;
‐set power switch 18 on the rear panel to position “I”;
‐ set the MMA welding mode by pressing the button 4; the modes switch over
end‐around;
‐use buttons 2to set the main parameter, which is welding current;
‐if necessary, additional functions of welding process can be adjusted—see a
changeover sequence in Clause 6.1.
Attention! Once the power switch is set to position “I” in the MMA welding mode,
the stick electrode becomes energized. Do not touch conductive or earthed
objects, such as, for example, welding machine frame, etc., with the electrode,
since the machine will take this as a signal to start the welding process.
3.1 WELDING CYCLE –ММА
See Clause 6.1 for sequence of changing the value of any function.
Electrode holder
Ground terminal
Product
t, s

PATON MultiPRO series DC MMA/TIG/MIG/MAG - 12 -
3.2 HOT START FUNCTION
Advantages:
‐ improved striking even when using electrodes with bad striking properties;
‐ better penetration of base material during striking and, consequently, less poor
penetrations;
‐ prevention of slag inclusions;
- manual adjustment; allows setting the function level to minimum value, thus
significantly reducing power consumption in the initial moment of striking. This
allows starting the source at values of mains voltage around the possible
minimum value, but compromises the quality of the striking moment (the
machine becomes similar to a transformer source, but in some cases this is the
only possible method). The function can also be increased to maximum value for
even better quality of the striking moment (if the machine is operated from good
power mains). However, keep in mind that boosted current of this function can
burn through the work piece when welding thin metal pieces, so it is
recommended to reduce the Hot Start value in such a case.
The result is achieved by the following means:
In the moment of arc striking, welding current increases by the default value
of +40% for a short time.
Example: welding with Ø3mm electrode, set the base value of arc current is
90A.
Result: hot start current is 90A + 40% = 126A.
In the additional settings, you can change both Hot Start magnitude [H.St]
and Hot Start time [t.HS]. Do not set Hot Start magnitude and time to
unnecessarily high values, since large limit values required for very strong power
supply mains, and if good mains are not available, striking process can even abort.
See Clause 6.1 for sequence of changing the value of any function in the current
welding mode.
3.3 ARC FORCE FUNCTION
Advantages:
‐enhanced short‐arc welding stability;
‐better transfer of metal drops into the weld pool;
‐ better arc striking;
‐reduced risk of electrode sticking; however, it is not the Anti‐Stick function, which
will be explained in the next clause;
‐manual adjustment: allows setting the function level to minimum value, thus
reducing power consumption (although insignificantly), as well as heat input
concentration when welding thin metal pieces. This reduces the risk of

- 13 - PATON MultiPRO series DC MMA/TIG/MIG/MAG
burn‐through, but also reduces the stability of short arc burning (the machine
becomes similar to a transformer source). The function can also be increased to
maximum value for even better stability of short‐arc burning, but this requires for
better supply mains and increases the risk of work piece burn‐through.
The result is achieved by the following means:
Due to reduction of arc voltage below the minimum permissible voltage of stable
arc burning, arc current increases by the default value of +40%.
In the additional settings, you can change both Arc Force magnitude [Ar.F] and
trigger level of this function [u.AF]. Do not set Arc Force magnitude and a trigger
level to unnecessarily high value, because at high limit values, especially during
welding with thin electrodes less than Ø3.2mm in diameter, affects actuation of
Anti‐Stick function, which will be explained in the next clause.
See Clause 6.1 for sequence of changing the value of any function in the current
welding mode.
3.4 ANTI‐STICK FUNCTION
During the initial arc striking, the electrode can stick or be tacked to the work
piece. Many functions of the machine resist this occurrence, but it is possible
nevertheless, first leading to overheating and eventually to damage of the
electrode.
In such a case, this machine actuates the built‐in Anti‐Stick function, which is
constantly operating in the MMA mode. Within 0.6...0.8s after detection of this
condition, this function reduces welding current. In addition, this function helps the

PATON MultiPRO series DC MMA/TIG/MIG/MAG - 14 -
welding operator to separate (detach) the electrode from the work piece without
risk to burn his eyes with accidental arc striking. Once the electrode is separated
from the work piece, the process of welding can be readily resumed.
3.5 FUNCTION OF SLOPE ADJUSTMENT FOR A CURRENT‐VOLTAGE CURVE
This function is primarily designed for convenient welding using electrodes
with different types of coating. By default, current‐voltage curve slope [CVS] is set
to 1.4V/A, which corresponds to the most commonly used electrodes with rutile
coating (ANO‐21, MR‐3). For more convenient work with basic‐coated electrodes
(UONI‐13/45, LKZ‐70), it is recommended, although not required, to set the slope
[CVS] to 1.0V/A. On the other hand, cellulose electrodes (CC‐1, VSC‐4А) even
require for setting the slope [CVS] to 0.2...0.6V/A, and sometimes it is also
necessary to rise trigger level of the Arc Force Function [u.AF] up to 18V. See
Clause 6.1 for sequence of changing the value of any function in the current
welding mode.
3.6 SHORT ARC WELDING FUNCTION
This function is especially important for overhead welding, when very long arc
is undesirable. For this purpose, the machine provides the possibility to set the
Short Arc function [Sh.A] to “ON” position. By default, it is set to “OFF” position.
See Clause 6.1 for sequence of changing the value of any function in the current
welding mode.
3.7 FUNCTION OF AN OPEN‐CIRCUIT VOLTAGE REDUCTION UNIT
When performing welding works in vessels, tanks and applications requiring
for enhanced electric safety system, one can enable the function of open‐circuit
voltage reduction.
In 0.1s after the electrode is detached from the work piece, the voltage on the
source terminals drops to a safe level below 12V.
In order to enable this function, an open‐circuit voltage reduction unit [BSn] is
required. This unit is envisaged in this equipment model, but is set to “OFF”
position by default, i.e. disabled, since it is known, that enabling of any such
function results in a somewhat worse arc striking. See Clause 6.1 for sequence of
changing the value of any function in the current welding mode.
3.8 PULSED CURRENT WELDING FUNCTION
This function is designed to facilitate control over the welding process in
spatial positions other than downhand position, as well as during welding of
non‐ferrous metals. This function affects directly weld metal dilution and metal
drop transfer into the weld pool and, consequently, on the stability of the weld

- 15 - PATON MultiPRO series DC MMA/TIG/MIG/MAG
forming and of the welding process. In other words, this process substitutes
movements of welder’s hand to some extent, which is especially important in
hard‐to‐reach places. The correct setting determines weld shape and quality of the
weld forming, thus reducing risk of porosity and grain structure of the weld and
consequently increasing weld strength.
In order to implement this function, three parameters must be set in the
machine: pulsing power [Po.P], pulsing frequency [Fr.P] and mark‐to‐space ratio
(or duty ratio) [dut]. By default, pulsing power [Po.P], which is the key parameter,
is set to “OFF” position, i.e. disabled, while pulsing frequency [Fr.P] and duty ratio
[dut] are set to the most common values of 50Hz and 50% respectively. In order to
enable this function, it is enough to set pulsing power [Po.P] to a value above zero.
This parameter is set in percent of the current set value of base arc welding.
Example: welding with a Ø3mm electrode, set the base value of arc current is
60 A, and pulsing power [Po.P] = 40%, while pulsing frequency [Fr.P] = 5.0Hz and
duty ratio [dut] = 50% by default.
Result: current will pulse in the range from 36A to 84A with a frequency of 5Hz;
pulses will be of the same shape in terms of both magnitude and time.
If duty ratio parameter [dut] is changed to a value other than 50%, pulses
become asymmetric—between the current pulse time and the current “pause”
time:
by default
“duty ratio” [dut] = 50%
“duty ratio” [dut] = 20%
“duty ratio”[dut] = 70%
The machine calculates pulsing in such a way that, at a constant set differential
of pulses, average level of welding current is maintained at the level of set base
welding current value of 60A (i.e. equal to the set value), in order to keep the
resulting average heat input into the weld at a constant level of 60A, but the
stability of the welding process and the mixing of the weld pool will change. This is
necessary in the situation, when a user has reduced base current and provided
maintenance of stable welding process using pulses—thus, decrease of heat input
can also be clearly determined by comparison with initial base current.
These parameters are set differently in different situations in accordance with
welding operator’s requirements. See Clause 6.1 for sequence of changing the
value of any function in the current welding mode.
t, s
t, s
t, s

PATON MultiPRO series DC MMA/TIG/MIG/MAG - 16 -
4. TUNGSTEN ARC INERT GAS WELDING (TIG)
In this welding mode, the wire-feeding machine is not needed!
Attention! The TIG-2T welding cycle is set by default, see Clause 4.2.1.
Shielding gas is most often pure argon “Ar”, sometimes helium “He”, as well as
their mixtures with different ratios.
Example: argon + helium “40%Ar+60%Не”.
EXCLUDE usage of combustible gases! Other gases can only be used upon
approval of the equipment manufacturer.
Attention! A common mistake is “needle‐like” electrode sharpening; in this
case, the arc may wag from side to side. A correctly sharpened electrode has
slightly blunted neg, and the smaller is the “butt” withstanding set current, the
better. Remember that a very sharp‐pointed electrode flashes off very easily at
high arc currents due to low heat emission. In addition, sharpening notches shall be
located along the electrode axis.
4.1.1 WELDING CYCLE –TIG-LIFT
See Clause 6.1 for sequence of changing the value of any function in the
current welding mode.
t, s

- 17 - PATON MultiPRO series DC MMA/TIG/MIG/MAG
Procedure for machine preparation to operation:
- disconnect all cables from the wire feeding mechanism;
‐insert the torch cable into the source socket B “–”;
‐ insert the “earth” cable into the source socket А“+”;
‐connect the “earth” cable to the work piece;
- install the pressure reducer on the gas bottle;
- connect the torch gas hose to the gas bottle pressure reducer;
- open the gas bottle valve, check the tightness;
‐connect the mains plug of the source to the supply mains;
‐set power switch 18 on the rear panel to position “I”;
‐set the TIG welding mode by pressing the button 4; the modes switch over
end‐around;
‐ set the function of the button of the TIG‐LIFT torch by pressing button 3until
the indicator shows [But], in 0.2s after the button is released, the machine will
display current positions of this function: use buttons 2to set it to [LFt]. If
nothing is done for a long time, the machine will leave this function. You can
return to it in the same way, and if you skipped the required welding mode, press
button 3again—the modes switch over end‐around;
‐use buttons 2to set the arc current after the machine goes to the main
parameter;
‐if necessary, additional functions of welding process can be adjusted—see a
changeover sequence in Clause 6.1.
Attention! The argon torch shall be a valve torch, with a bayonet connector
Ø13 mm. Select the maximum torch current depending on your operating
requirements.

PATON MultiPRO series DC MMA/TIG/MIG/MAG - 18 -
4.1.2 TIG‐LIFT ARC STRIKING FUNCTION
This function is designed for torches with contact arc striking, without use of
high‐frequency injection units and other similar units. However, unlike the
conventional method, it completely eliminates surge current at the moment of
striking, thus reducing the several‐fold destruction of the non‐consumable
tungsten electrodes and ingress of its inclusions into the weld, which is very
adverse effect.
Attention! The valve on the torch should be opened independently before
welding and closed after the process is completed.
This function is implemented by touching the work piece with the electrode.
The user can keep the electrode in this position for an unlimited time, and when
he/she decides that he/she is ready to proceed with welding (for example: he/she
has covered the eyes with a headshield and sufficiently purged the place of welding
with shielding gas), it is enough to start SLOWLY lifting the tip of the sharpened
electrode from the work piece. The machine will detect this moment and take it as
a signal to start the welding process. Thus, it will start FADING arc current up to the
set value. The higher is base operating current, the faster the electrode shall be
lifted, and otherwise it will flash off. Time of current fade‐in [t.uP] up to the set
value will be reviewed in the next Clause.
4.2.1 WELDING CYCLE –TIG-2T
See Clause 6.1 for sequence of changing the value of any function.
t, s
t, s

- 19 - PATON MultiPRO series DC MMA/TIG/MIG/MAG
Procedure for machine preparation to operation:
- disconnect all cables from the wire feeding mechanism;
‐insert the torch cable into the source socket B “–”;
- screw the gas plug from the argon torch tightly to the socket 14;
- insert the socket of the torch control buttons to the socket 13;
‐ insert the “mass” cable into the source socket А“+”;
‐connect the “mass” cable to the work piece;
- install the pressure reducer on the gas bottle;
- connect the torch gas hose to the gas bottle pressure reducer and the plug on
the rear panel of the source;
- open the gas bottle valve, check the tightness;
‐connect the mains plug of the source to the supply mains;
‐set power switch 18 on the rear panel to position “I”;
‐set the TIG welding mode by pressing the button 4; the modes switch over
end‐around;
‐ set the function of the button of the TIG‐LIFT torch by pressing button 3until
the indicator shows [But], in 0.2s after the button is released, the machine will
display current positions of this function: use buttons 2to set it to [2t]. If nothing
is done for a long time, the machine will leave this function. You can return to it in
the same way, and if you skipped the required welding mode, press button 3
again—the modes switch over end‐around;
‐use buttons 2to set the arc current after the machine goes to the main
parameter;
‐if necessary, additional functions of welding process can be adjusted—see a
changeover sequence in Clause 6.1.

PATON MultiPRO series DC MMA/TIG/MIG/MAG - 20 -
Attention! Argon torch shall be a button torch, with a bayonet connector of
Ø13 mm. Select maximum torch current depending on your operating
requirements. It shall be delivered with the machine.
4.2.2 FUNCTION OF BUTTON ON A TIG‐2T TORCH
This control button function is used only upon availability of an external
independent non‐contact arc‐striking unit (high‐frequency injection unit) and
in‐built gas valve. When the torch button is pressed, the control signal is sent to the
high‐frequency injection unit, which performs the function of weld zone
pre‐purging with gas (opens the gas valve) and sends the switch‐on signal to the
source with a time delay; at the same time, a high‐frequency high‐voltage pulse is
issued for arc striking. The source performs all other functions (they will be
explained in details in the next clauses) in accordance with the welding cycle
described above. After the button is released, the source performs the arc current
fade‐out function and switches off independently upon completion. The
high‐frequency injection unit must perform the function of weld zone post‐purging
with gas (the gas valve is closed with a delay).
4.3.1 WELDING CYCLE –TIG-4T
See Clause 6.1 for sequence of changing the value of any function.
t, s
t, s