Most PONTIG 202 AC/DC MOST User manual

User Manual for Welding Rectier
PONTIG 202 AC/DC MOST
User Manual
Version 1.0k of 11.06.2019
Original manual
Catalogue no: 52 00 005421
Attention! Every person using or responsible for the maintenance of this device should
read the entire contents of this user’s manual before starting work. This will optimize the
use of device potential.
Attention! A copy of this User Manual should be stored near the device and available for
operator at all times.

User Manual
Version 1.0k of 11.06.2019
Original manual
PONTIG 202 AC/DC MOST -2-
Table of Contents
1. Health and Safety Manual
2. Maintenance
3. Technical description
4. Installation and use
5. Technical data and device completion
6. Device construction
7. PONTIG 202 AC/DC control panel
7.1 Description of the device buttons
7.2 Welding parameter settings
7.3 Description of the control panel operation
7.4 Saving parameters
8. TIG welding
8.2 TIG DC Pulse welding
8.3 TIG AC welding
8.4 TIG AC Pulse welding
9. TIG buttons operating modes
10. MMA coated electrode welding
11. Problems occurring during welding
12. Electrical scheme
13. EU Declaration Of Conformity
14. Recycling

User Manual
Version 1.0k of 11.06.2019
Original manual
PONTIG 202 AC/DC MOST -3-
Thank you for buying the Inverter Rectier PONTIG 202 AC/DC MOST.
Prior commencing work please familiarize yourself with the user manual. The device PONTIG
202 DC MOST was designed for DC TIG welding with argon shield (steel and stainless steel),
and for AC welding (aluminium and its alloys) or for coated electrodes MMA. We do believe that
this product will meet your requirements.
1. Health and Safety Manual
WARNING: The device can not be used for the purpose of pipe defrosting!
] Information contained on the icons placed on the device:
Use and maintenance of welding equipment may be dangerous. The user must
observe health and safety rules and regulations. Welding and cutting machines
may be used only by qualied personnel. Follow your local rules and regulations
on working with that type of devices and prevention of accidents.
Prior to starting your work remove all ammables from the welding area. Welding
inside tanks previously used as ammable liquid storage (e.g. petrol) is forbidden.
Place all combustible materials away from welding spatter.
Do not expose the device to rain or water vapour and do not spray water over it.
Do not weld without proper eye protection. Pay attention to providing safety for
bystanders against welding radiation.
Use ventilation and lters in order to remove welding fumes from the work site.
Use individual lters if the ltering/ventilation system does not operate correctly or
is not available.
Stop your work immediately after nding damage to the power cords. Do not to-
uch the damaged cords. Prior a repair or maintenance disconnect the device from
power source. Never use the device with damaged power cords.
Keep a re extinguisher close to the welding location. After nishing work
check the work station against re hazards.
Never try to x a damaged gas reducer on your own. In case of malfunction repla-
ce the reducer to a fully functional one.

User Manual
Version 1.0k of 11.06.2019
Original manual
PONTIG 202 AC/DC MOST -4-
ATTENTION: The following user manual should be read prior installing and starting
the device. OSH manual should be known to every welder and employee responsible
for equipment maintenance.
PRELIMINARY REMARKS
Commissioning and normal operation are possible only after carefully reading the following
manual. Arc welding requires compliance with the requirements for electric arc welding and re
regulations. The welder should be supplied with protective clothing and equipment in
accordance with current regulations. It is necessary to use a set of personal protective
equipment (PPE) in accordance with provisions of the Council Directive 2016/425/EEC. The
personal protective equipment includes: welding mask with a protective lter, welding gloves,
protective apron, welding clothing, and leather shoes. Despite the high technical standard of
the device, the personnel should represent considerable discipline in approach to health and
safety requirements to protect against harmful and health hazardous factors developed from
welding technology.
OPERATING CONDITIONS
This device can operate under severe conditions. It is however important to apply simple
preventive measures to ensure long and reliable work:
- do not place or use this device on an inclined surface (of more than 15º),
- do not use the device for pipe defrosting,
- the device must be located in a place where the free circulation of clean
air is ensured without any restriction of airow to and from the fan. When the device is
connected to the network, do not cover it with, for example, paper or cloth;
- minimize the amount of dirt and dust that can get into the device,
- device housing has an IP21S protection. Keep it dry and do not place on
wet surfaces or in a puddle,
- do not use the device for welding the tanks previously used for storing ammable substances.
ENVIRONMENTAL CONDITIONS
Range of air temperatures for
- operation: from-10ºC to +40ºC
- storage and transportation: from -25ºC to +55ºC
- Relative air humidity: up to 50% at +40ºC; up to 90% at +20ºC.
GASES AND FUMES
TIG and MMA welding modes produce harmful gases and fumes containing ozone and
hydrogen as well as oxides or metal particles. Therefore, the welding work station should be
tted with very good ventilation (dust and smoke extraction or airy location). Metal surfaces
intended for welding should be free from chemical contamination, especially degreasers
(solvents),
that decompose during welding process and produce toxic gases. Welding of galvanized,
cadmium-coated or chromium-plated parts is permitted only when a suction and ltering device
is tted, and with introduction of fresh air to the welding work station.

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PONTIG 202 AC/DC MOST -5-
RADIATION
Ultraviolet emission radiated when welding is harmful to eyesight and skin. Therefore a welding
mask with protective lters is required. Welding work station should meet certain requirements
and include:
• adequate lighting system,
• xed or movable protection screens, governing bystanders against radiation e󰀨ects (depen-
ding on requirements),
radiation e󰀨ects,
• placed in a room with appropriate wall colour (absorption of UV radiation)
FIRE PROTECTION
Welding work station should be located at a safe distance from ammables placed especially
on the oor or walls. All ammables need re protection against hot metal drops. It is
recommended to t the work station with re blankets and re extinguishers.
PROTECTION AGAINST ELECTRIC SHOCK
It is unacceptable to connect the device to an improper installation or to an installation
with unveried zeroing e󰀩ciency. Removing the outer covers at a time the device is connected
to the electricity network, as well as the use of the device with covers removed
IS PROHIBITED. It is not allowed to work on a suspended device e.g. using gantry or
crane. Maintenance and repair works should be carried out by authorized personnel in
compliance with the applicable safety conditions.
2. Maintenance
ATTENTION: In order to carry out any repair or maintenance work, it is recommended
to contact your nearest RYWAL-RHC technical support (a list of authorized service
shops is available on the last page of the manual).
In the event of noticing any damage, the welder should stop working, should disconnect the
device from power supply and report it to direct supervisor or appropriate service -
RYWAL-RHC technical support.
General maintenance (daily)
- check the condition of cables and connections, replace if necessary,
- check condition of welding torch and connection with welding cable, replace if necessary,
- check condition and operation of the cooling fan; keep the cooling air inlet and outlet openings
clean,
- keep the device clean.
Periodic maintenance (every 3 months at least)
Periodic maintenance frequency can be increased depending on working conditions
and the intensity of use.
Maintenance:
- using a stream of dry air (at low pressure) remove the dust from the outer parts of the casing
and from inside of the welding device,
- check and tighten all the screws,
- check the state of all electrical contacts and correct if necessary.

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Original manual
PONTIG 202 AC/DC MOST -6-
ATTENTION: Device must be disconnected from electrical network before performing
any maintenance or service work. After each repair, perform respective check
to ensure safe use.
Mandatory device checks
According to the Labour Code provisions: „All responsibility for the safe use of machinery and
equipment shall be borne by the owner.” This results in the obligation to perform periodic and
post-repair checks and inspections of equipment.
Periodic tests are carried out at least once a year (legal basis EN ISO 17662 clause 4.2), and
post-repair tests after each repair that restored welding functionality (legal basis: EN 60974-4
clause 4.6).
All above services are performed by the technical support of RYWAL-RHC.
3. Technical description
The PONTIG 202 AC/DC is an inverter welding rectier for TIG welding in an argon shield
(arc ignition by HF ionizer) or for MMA with coated electrode (Stick). The device has excellent
welding properties and has a wide application range. It may be used for welding:
a/ MMA electrode welding - in direct current (DC)
Recommended electrodes from 1.6 to 3.25 mm in diameter. Electrodes with a rutile or alkaline
coating (idling voltage DC Uₒ = 60V), for steel or stainless steel,
b/ TIG DC welding method
Ignition of the arc by the HF ionizer, gas opened automatically by the electrovalve in the device.
For welding stainless steel or ordinary steel, recommended tungsten electrode diameter 1.6 or
2.4 mm You can weld in a continuous or pulsed current.
c/ TIG AC method
Ignition of the arc by the HF ionizer, gas opened automatically by the electrovalve in the device.
Welding of aluminium or its alloys, recommended diameter of tungsten electrode 1,6 or
2.4 mm Available functions of AC balance, negative / positive AC and
pulsed voltage regulation.
The device is protected against overheating by a thermal sensor. It is made
in accordance with the IEC 60974-1 standard, „Arc welding equipment. Part 1: Welding power
sources”.
4. Installation and use
- The user is responsible for connecting the device in accordance with the manufacturer
instructions. In the event of electromagnetic interference, the user should remove the cause
after prior consultation with the manufacturer.
- Before using the equipment, the welder should estimate the possible impact of disturbances
on the environment, in particular the presence of persons with pacemakers or hearing aids.
- Work with a power generator is acceptable, but it must meet certain requirements. It is
recommended to use a unit with a power of min. 8 kVA with asynchronous generator. If the
generator does not provide adequate power, this results in lowering the arc parameters or
turning o󰀨 the rectier.

User Manual
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Original manual
PONTIG 202 AC/DC MOST -7-
Parameter Unit Value
Electrical power supply V/Hz 1x230/50-60
Power tolerance % +15/-15
Welding current range A TIG: 10-200
MMA: 10-160
Welding current set point Stepless
Overload protection A 16 delayed
Work cycle
MMA DC A/%
160/30
114/60
88/100
Work cycle
TIG A/%
200/25
129/60
100/100
MMA electrode diameter mm 1,6-3,25
Sockets for connecting
welding cables.
35/50 (large)
Power factor cos  0,7
Power consumption kW 8,2 (MMA)
6,0 (TIG)
E󰀩ciency % 85
Plug Schuko 16A
Insulation class F
Protection class IP 21S
Standard EN 60974-1
Mark CE
Dimensions mm 502x218x382
Weight kg 9,0
(17 kg carton of accessories)
Catalogue no. 52 00 005421
5. Technical data and device completion
Table 1: Technical data PONTIG 202 AC/DC MOST.
Device assembly:
PONTIG 202 DC is delivered in a cardboard box with gas hoses, mass cables and MMA
welding electrode. TIG torch is an optional accessory - see Accessories.
Accessories:
TIG 26 Most 4m Torch (Pontig 210 /202) 56 01 032622
TIG 26 Most 8m Torch (Pontig 210/202) 56 01 032624
Welding trolley WUS HD 50 03 003942

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PONTIG 202 AC/DC MOST -8-
6. Device construction
Figure 1: Construction of PONTIG 202 AC/DC MOST
1. ON/OFF switch (rear side)
2. Gas connection (rear side)
3. Top handle
4. Control panel (see section 7)
5. Current socket (+)
6. TIG torch control socket
7. TIG torch gas socket
8. Current socket (-)
9. Power cable with plug (rear side)
8
2
9
1
7
3
6
5
4
7. Pontig 202 AC/DC Control panel
Figure 2: Control panel for Pontig 202 AC/DC MOST
1. Display and unit diodes
2. Welding method selection
3. Operating mode of the TIG
torch
4. Knob
5. Additional functions
6. Welding parameter curve

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PONTIG 202 AC/DC MOST -9-
Figure 3: 3-digit display (1) and unit diodes
Figure 4: Selection of welding method (2)
Figure 5: Operating mode of the TIG torch (3)
Display
of parameter
values or error
codes
Current in Ampers [A]
Unit of time - seconds
AC Balance or pulse
rate (in percent)
Frequency of AC or
pulse frequency (Hz)
Function
selection (down)
(12)
SPOT welding
(15)
Selection of
welding mode
(16)

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Figure 6: Welding parameters diagram (6)
Figure 7: Additional functions (5)
Pre-ow time (17)
On the left side of the panel with additional functions there is a knob (4) to switch between
parameters. After pressing we can set the parameter value, which is conrmed by pressing (4)
again.
TIG Spot welding
time or MMA
ArcForce (20)
Upslope time
(19)
Initial current
(18)
Background
current I2 (28)
Balance (27) Post-ow
time (26)
Final cur-
rent (25)
Downslope
time (24)
Pulse frequency [Hz]
or current peak time
(23)
AC
frequency
(22)
Welding current
I1 (21)
Remote control or local control
(29)
Incorrect current value and elec-
trode diameter (30): diode lights
up yellow
Selection of electrode diameter
(31)

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PONTIG 202 AC/DC MOST -11-
7.1 Description of the device buttons
Selecting welding method (2)
By pressing (12, see Fig. 4)switch between welding methods. The button works if
there is no welding in process. The following welding methods are available:
MMA with electrode AC TIG AC Pulse TIG DC TIG DC Pulse TIG
Figure 8: Selecting welding method
Selecting the operating mode of the TIG welding torch
By pressing (16, see g. 5) we can choose between di󰀨erent modes of operation of the
TIG torch with digital control. The button works if there is no welding in process.
The following operating modes are available:
2T (2-stroke) 4T (4-stroke) Spot welding
Figure 9: Welding mode selection / digital control.
By pressing (16, see Fig. 5) we can choose between di󰀨erent operating modes of the
TIG torch with analogue control or a remote control pedal. The button works if there is no
welding in process. The following operating modes are available:
2T (2-stroke) 4T (4-stroke)
Figure 10: Selection of welding modes / Remote control pedal or analog controlled
torch mode.
Attention: Remote control of the pedal is connected to the TIG control socket (6 see Fig. 1).

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PONTIG 202 AC/DC MOST -12-
7.2 Welding parameter settings
Press the knob (4) to switch between di󰀨erent welding parameters (see gure 6. Settings can
also be changed while welding. The selection of the parameter (the choice is marked with
the diode) is done by turning the knob (4).
Welding
method
Operating
mode of
the TIG
torch (13;
14;
15)
Gas
pre-ow
(17)
Initial
current
(18)
Upslope
time (19)
Welding
current
I1
(20)
I2 Base
Current
(28)
AC
frequency
(22)
AC
Balance
(23)
MMA
(11) NO × × × ●× × ×
TIG DC
(9)
2T ●●●●× × ×
4T ●●●●× × ×
Spot
weld. ●●●●● × ×
TIG DC
Puls
(10)
2T ●●●●● × ×
4T ●●●●● × ×
Spot
weld. ●●●●● × ×
TIG AC
(7)
2T ● ● ● ● ● ● ●
4T ● ● ● ● ● ● ●
Spot
weld. ● ● ● ● ● ● ●
TIG AC
Puls
(8)
2T ● ● ● ● ● ● ●
4T ● ● ● ● ● ● ●
Spot
weld. ● ● ● ● ● ● ●
Direction of turning
Table 2.1 Selection of parameters depending on the welding method (numbering
according to gure 4, 5, 6 and 7)

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PONTIG 202 AC/DC MOST -13-
Welding
method
Operating
mode of
the TIG
torch (13;
14;
15)
Arc
Force
(20)
Time
of
spot
weld.
(20)
Upslope
time
(24)
Pulse
frequency
(23)
Peak
current
time
(23)
Final
current
(25)
Gas
outlet
(26)
Selec-
tion of
the MMA
elec-
trode
diameter
or tung-
ste
MMA
(11) NO ●× × × × × × ●
TIG DC
(9)
2T × × ●× × ● ● ●
4T × × ●× × ● ● ●
Spot
weld. × × ● ● ● ● ● ●
TIG DC
Puls
(10)
2T × × ● ● ● ● ● ●
4T × × ● ● ● ● ● ●
Spot
weld. ×● ● ● ● ● ● ●
TIG AC
(7)
2T × × ●× × ● ● ●
4T × × ●× × ● ● ●
Spot
weld. ×● ● ● ● ● ● ●
TIG AC
Puls
(8)
2T × × ● ● ● ● ● ●
4T × × ● ● ● ● ● ●
Spot
weld. ×● ● ● ● ● ● ●
Direction of turning
Table 2.2 Selection of parameters depending on the welding method (numbering accor-
ding to gure 4, 5, 6 and 7)
Notes to Tables 2.1 and 2.2:
1. ● parameter available × parameter not available
2. Press the knob for 2 seconds to quickly switch between parameters.
If any parameter is highlighted, it will be restored after approx. 10 seconds without any action
the welding current I1 will be shown on the display.
3. The function of electrode selection (31) is used to automatically adjust some functions
eg initial current, welding current range, etc. for a given electrode diameter. If values
of selected parameters by the welder do not correspond to the diameter of the electrode, diode
(30) will be highlighted in yellow. This is a warning of incompatibility between the used
electrode and welding parameters. Therefore, after setting the appropriate parameter values,
the diode (30) will go out.
4. Switching between welding methods, parameter values relevant for the given method
will remain unchanged. Their ranges may vary depending on the chosen method.

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PONTIG 202 AC/DC MOST -14-
7.3 Description of the control panel operation:
- The control panel consists of buttons, LED indicators, a digital display and a knob. The control
panel is convenient for users.
- The 3-digit panel display shows parameter settings, current values and error codes E-x.
-Functions 2T; 4T and spot welding are available at operating mode of the TIG button
- ArcForce function for MMA electrode welding: automatic increase of welding current
in the case of sticking of the end of the electrode with the material being welded, particularly
useful at welding pipes.
- High-reliability TIG HF ignition
- All functional parameters are adjustable.
- TIG DC, TIG pulse, TIG AC, TIG AC pulse and MMA welding methods are available.
- Gas pre-ow time,post-ow time, initial current, upslope time, downslope time and nal current
are regulated in the TIG DC and TIG AC methods.
- Gas pre-ow time, post-ow time, initial current, upslope time,
downslope time, welding current, background current, pulse frequency are adjustable at
TIG pulse and TIG AC pulse operating modes.
- The device displays error codes (see section 10) in the event of overvoltage, undervoltage or
overheating.
- An error memory function and a statistical function available Cumulative error times can be
obtained.
7.4 Saving the parameters after nishing welding.
The parameters used will be automatically saved after switching o󰀨 the device (no automatic
saving will be done if no operation is performed after setting the parameters and when the
machine is switched o󰀨 within 5 seconds).
When the device is switched on the next time, the parameters will be restored. When the
welding mode and the TIG button operating mode are selected again, auto-saving will be
carried out after 10 seconds.

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8. TIG welding
Connect the device to the 230 V mains cable (9, see g. 1).
Connect the TIG holder to the socket (8) (minus) on the front of the device, connect the control
plug to the socket (6) and tighten the gas connection (7).
Insert the mass cable and secure it to the socket (5) (plus), provide gas to connector 2 at the
back of the device. Switch on the device with the ON / OFF switch (1). The TIG torch should
have a tungsten electrode with the appropriate diameter and the appropriate angle of
sharpening corresponding to the TIG welding current. The same applies to DC / stainless steel
(TIG DC) as well as aluminium and its alloys (TIG AC).
After the appropriate setting of the welding parameters, set the correct argon ow with
a bottle reducer.
Press the TIG torch trigger to start the solenoid valve and the HF ionizer.
The TIG torch should be kept 2 ~ 4 mm from the workpiece. After arc ignition, HF current
disappears and welding current I1 increases to the set value. After releasing the torch trigger,
the current begins to automatically decrease to the nal current value. Then the arc goes out
while maintaining gas ow in the set up time.
8.1 TIG DC welding
Figure 11: TIG DC current path
To choose the method press button (12), the diode (9) lights up (according to gure 4)
In TIG DC mode, 8 adjustable parameters are available. Description according to Figure 11:
- Welding current (I3) : set according to your user’s welding requirements.
- Initial current (I1): turns up when the arc is ignited. If the initial current is high
enough, the arc is easier to ignite. However, when welding thin elements,
reduce its value to avoid material burn-out when starting to
work. In some welding methods, the current does not increase, but remains at the initial value
to preheat the material or highlight it.
- Final current (I5) : In some welding methods, the arc does not go out after the downslope
time, but it remains at the value of the nal current. The nal current is used to ll the crater on
the end of the weld.

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- Gas pre-ow time: This is the time after pressing the trigger on the TIG torch, in which the
gas ows before the arc is ignited using the HF ionizer. It should usually be longer than 0.5s
to protect the gas purity at the start of the weld. The gas ow time should be increased if the
welding torch is long.
- Gas post-ow time: This is the time since the arc goes out until the gas valve is closed
inside the device. If it’s too long, it causes argon loss; if it is too short, it can cause oxidation
of the end of the weld (crater). In the case of TIG AC or non-ferrous metal welding, this time
should be longer.
- Upslope time (tr): This is the time of I2 current increase from zero to preset value of
welding current, according to the user’s welding requirements.
- Downslope time (td): gradual ramping down of welding current I4 to zero
(or nal current) and should be set in accordance with user’s welding
requirements.
- Selection of tungsten electrodes: see details in table 3:
Diameter of tungsten
electrode. (mm) Welding current range (A)
1,0 5 - 30
1,6 21 - 90
2,0 46 - 135
2,4 71 - 180
3,2 131 - 200
Table 3: Recommended TIG DC currents for a given tungsten electrode diameter
8.2 TIG DC Pulse welding
Figure 12: TIG DC pulsed current

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To choose the method press button (12), the diode (10) lights up (see gure 4).
In the TIG DC Pulse method, all TIG parameters are available, but the welding current consists
of two components: Ip and Ib. Four parameters are subject to regulation. Description below
according to the Figure 9:
- Peak current (Ip): current in amperes at time tp according to the customer’s welding technolo-
gy.
- Background current (Ib): current in amperes at time tb according to client welding technology.
- Pulse rate (1/T): according to the formula T = tp + tb. value according to client welding techno-
logy, range of 0.2-200 Hz (see Fig. 12).
- Peak current time factor (100% * tp / T): percentage of peak current in the pulse period,
value according to client welding technology, range 10-90%.
8.3 TIG AC welding
tc
tp
I0
I2
0
I1
tu
td
I0 - Initial current; I1 - welding current; I2 - nal current, tu - upslope time; td - downslope time
tp - alternating current (AC) period; tc - positive electrode time
Figure 13: Alternating current ow TIG AC square wave
To choose the method press button (12), the diode (7) lights up (see gure 4).
In the case of TIG AC welding, the gas pre-ow time and the outow time are the same
as in DC TIG welding. Other parameters are described below (according to gure 12):
- Initial current (I0 - range 5 - 160A), welding current (I1) and nal current (I2): The preset
value of three parameters is the average (average deviations) of the welding current, values
according to the user’s welding requirements.
- Pulse rate (1/tp): value according to the user’s welding requirements, range 20-
250 Hz
- AC balance (100% * tc / tp). The ratio of negative and positive current within Alternating
Current a󰀨ecting welding speed and weld cleanness for aluminium and its alloys, range 20 -
80%. In the alternating current, the negative electrode is responsible for cleaning the weld from
oxides generated during welding. Its high percentage slows down welding and causes faster
electrode wear, the weld pool is wide and shallow. Usually the share of the negative electrode
is 10-40% of the total. The positive electrodes of the AC current increases the welding speed,
the welding arc is more concentrated, the penetration is deeper.

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8.4 TIG AC Pulse welding
tc - positive electrode time, tp - AC current period
Tp - pulse peak time, T - pulse period
Figure 14: TIG AC current ow with additional pulse
To choose the method press button (12), the diode (8) lights up (see gure 4).
The TIG AC welding with an additional pulse is distinguished by a di󰀨erent waveform AC and
additional values of the peak current and the background current. Preset peak current
and the background current is respectively the peak value of the low frequency pulse (average
value) and background value (average value). The settings are similar to those described in the
chapter 8.2 (AC welding with a square wave). To set the frequency of the current pulse and the
duration of the pulse you can refer to the values as for TIG DC pulse welding. Frequency of AC
(1 / T) pulses can be adjusted in the range from 0.2 to 200 Hz. Pulse duration ratio (Tp / T)
can be adjusted from 1-99%.
9. Operating mode available on the TIG torch trigger
The TIG operating mode determines the operation of the torch trigger in the TIG method. The
operating mode can be connected to the remote control in the grip handle.
The operating mode of the TIG torch should be selected in accordance with the welding tech-
nology and welding preferences at the workplace. All TIG operating modes for this device are
listed in this chapter.
Notes on the operation of the torch trigger
2-stroke operation mode (2T): Press
the torch trigger to start welding
2-stroke operation mode (2T): Rele-
ase the torch trigger to stop welding
4-stroke operation mode (4T): Press
the torch trigger, and then release
release it at any time, the welding
current stays on without having to hold
the trigger
4-stroke operation (4T): to stop
welding again press the torch trigger,
the current will start to fall to the nal
value.

User Manual
Version 1.0k of 11.06.2019
Original manual
PONTIG 202 AC/DC MOST -19-
TIG operation modes
Mode
no. Action Operation of the torch trigger
and current curve
1
Spot welding SPOT mode (diode (15) according to g. 5)
1) Press the torch trigger: the arc is ignited and the current
increases to the set value within the set time.
2) After the spot welding time, the current drops gradually
and the arc goes out. You do not have to release the trigger
on the torch. Attention: We choose the time of spot
welding with the parameter (20) according to Fig. 5). We
suggest resetting the upslope times (19) and downslope
times (24) according to Fig. 6.
2
2-stroke mode 2T (diode (13) according to g. 5)
1) Press the torch trigger: the arc is ignited and the current
gradually increases.
2) Release the torch trigger: the current drops gradually and
the arc goes out.
3) If you press the torch trigger again before the arc goes
out, the current will gradually increase as in point 2.
3
4-stroke mode (4T): (diode (14) according to g. 5)
1) Press the torch trigger: the arc is ignited and the current
reaches the initial value.
2) Release the torch trigger - current increases gradually.
3) Press again: the current falls to the value of the nal arc
current level.
4) Release the torch trigger: the arc stops.
Table 4: Operating modes of the TIG torch

User Manual
Version 1.0k of 11.06.2019
Original manual
PONTIG 202 AC/DC MOST -20-
10. MMA coated electrode welding
Connect the device to the 230 V mains cable (9, see g. 1). Connection of wires to
the MMA electrode welding
- Connect the ground wire plug to the (8) (-) socket on the device
- Connect the plug of the electrode holder to socket (5) (+) on the device.
ATTENTION: Some coated electrodes require reverse polarity - see instructions
on the electrode pack. Switch on the device with the ON / OFF switch (12).
Starting the welding mode with the electrode is carried out by pressing the button (5) -
the indicator (11, see g. 2) lights up.
ATTENTION: Avoid accidentally touching the end of the electrode with the material, as
the welding current is still present in the cables.
After switching the device on (ON), set the proper welding current for the given
electrode diameter with the knob (4) (see instructions on the electrode pack). The
value of the welding current is shown in the panel display (1) (the indicator (21) is
continuously lit).
The electric arc is initiated by rubbing the end of the electrode with the base material
(connected
with the device by earth cable), and after the arc occurs, it is necessary to quickly move the
electrode tip for the right distance.
If the end of the electrode is removed too quickly, the arc will be torn o󰀨 and alternatively,
moving too slow can result in creating short circuit and sticking the end of the electrode to the
material.
Figure 15: Changing of current and voltage during welding