HTP Invertig 201 AC/DC User manual

Invertig 201 AC/DC
Owner’s Manual
America Inc.
HTP America, Inc. •3200 Nordic Road •Arlington Heights, IL 60005-4729
1-800-USA-WELD •847-357-0700 •FAX: [phone] •www.usaweld.com

Manufacturer’s Warranty
It is expressly agreed that there are no warranties, expressed or implied, made by either the
Salesman, Dealer, or HTP America, Inc. on products or parts furnished hereunder, except the
Manufacturer’s Warranty against defective materials or workmanship as follows:
HTP America, Inc. warrants each new welding machine to be free from defects in material and
workmanship under normal use and service for three years after delivery to the original purchaser.
HTP America, Inc. will repair and replace, at its factory, any part or parts thereof, products to be
returned to HTP America, Inc. with transportation charges prepaid and which its examination shall
disclose to its satisfaction to have been thus defective. This warranty being expressly in lieu of all
other warranties, expressed or implied, and all other obligations or liabilities on its part and it neither
assumes nor authorizes any other person to assume for it any other liability in connection with the
sale of its machines.
This warranty shall not apply to any welding machine which has been repaired or altered by
unauthorized service departments in any way so as in the judgment of HTP America, Inc. to affect
its stability and reliability, nor which has been subjected to misuse, negligence or accident.
HTP America, Inc. shall not be liable in any event, unless HTP America, Inc. receives notice of
alleged breach of warranty within not more than 30 days after the discovery, actual or construction
alleged breach of warranty specifying the claimed defect.
HTP America, Inc. has reserved the right to make change in design or add any improvements to its
products at any time without incurring any obligation to install same on equipment.
This warranty is void unless warranty card is sent to HTP America, Inc. within 15 days from date
of purchase.
Note:
Exclusions to Warranty:
1. The Tig Welding Torch is warranted for a period of ninety (90) Days against defects in material
and workmanship.
2. The tungsten, collet, collet body, ceramic nozzles are consumable items,
WHICH CARRY NO WARRANTY.
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For more information, refer to the following standards and
comply as applicable.
1. ANSI Standard Z49.1 SAFETY IN WELDING AND
CUTTING, obtainable from the American Welding Society,
2051 NW 7th St., Miami, FL 33125.
2. ANSI Standard Z87.1 SAFE PRACTICE FOR
OCCUPATION AND EDUCATIONAL EYE AND FACE
PROTECTION, obtainable from American National
Standards Institute, 1430 Broadway, New York, NY 10018.
3. America Welding Society Standard A6.0 WELDING AND
CUTTING CONTAINERS WHICH HAVE HELD
COMBUSTIBLES, obtainable same as item 1.
4. NFPA STANDARD 51. OXYGEN-FUEL GAS SYSTEMS
FOR WELDING AND CUTTING, obtainable from
the National Fire Protection Assoc., 470 Atlantic Avenue,
Boston, MA 02210.
5. NFPA Standard 51B. CUTTING AND WELDING
PROCESSES, obtainable same as item 4.
6. CGA PAMPHLET P-1. SAFE HANDLING OF
COMPRESSED GASES IN CYLINDERS, obtainable from
the Compressed Gas Association, 500 Fifth Avenue,
New York, NY 10036.
7. OSHA Standard 29 CFR, Part 1910, Subpart Q WELDING,
CUTTING AND BRAZING.
Safety Suggestions
Electric arc welding produces ultra-violet rays, which are
harmful to skin and eyes. Ultra-violet radiation can penetrate
lightweight clothing, reflect from light colored surfaces, and
burn the skin and eyes. Wear flameproof welding gloves which
are not oily or greasy. The oil or grease on the gloves may
ignite. Wear a heavy, pocket-less, long sleeve shirt, cuffless
trousers, and high-topped work shoes. Wear a full-face welding
helmet with a number eight or darker lens and a cap. These
precautions will protect eyes, hair, face, and skin from arc rays
and hot material.
– To avoid fire, do not weld on wood, plastic tile, or carpeted
floors. Concrete or masonry floors are safest.
– Do not weld on drums, barrels, tanks or other containers until
they have been cleared as described in AWS Standard A6.01.
– Provide adequate ventilation in the welding area at all times.
Do not weld on galvanized zinc, cadmium or lead beryllium
materials unless POSITIVE sufficient ventilation is provided.
These materials produce toxic fumes.
– Do not weld in areas close to degreasing or spraying
operations. Chlorinated hydrocarbon vapors may react with
the ultra-violet rays and form highly toxic phosgene gas.
– If you develop momentary eye, nose or throat irritation
during welding, stop welding immediately. This is an
indication that ventilation is not adequate. Do not continue
to weld until ventilation is improved.
– Exposed, electrically hot conductors or other bare metal in
the welding circuit, or ungrounded electrically hot equipment
can fatally shock a person whose body becomes a conductor.
Do not stand, sit, lie, lean on or touch a wet surface when
welding.
– Frequently inspect cables for wear, cracks, and damage.
Replace those with excessively worn insulation to avoid a
possible lethal shock from bared cable.
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Electrical Connection
Your Invertig 201 AC/DC operates on single-phase 230 volt
power (+/- 20%). The machine is not shipped with a plug. The
input power cord has 3 wires. The yellow-green wire is ground,
and the blue and brown wires are the hot leads.
Input power and will require a 30-amp circuit when operating at
200 amps.
All electrical connections should be performed by a qualified
electrician in accordance with the National Electrical Code and
local codes and ordinances.
Front Panel Controls (See Fig. 1)
1. Power Indicator Lamp
This lamp is illuminated when the On-Off switch on the back of
your Invertig 201 is turned to the 1 or “On” position, indicating
the unit is correctly connected to 220 volt AC power.
2. Welding Current Indicator Lamp
When either the foot pedal or the trigger switch on the TIG
torch is depressed, welding current will be applied to the
welding torch and the Welding Current Indicator Lamp will be
illuminated.
If your Invertig 201 AC/DC is in the stick-welding mode, the
welding current indicator lamp will be illuminated all the time.
3. Thermoswitch Indicator Lamp
The thermoswitch indicator lamp will light up when the duty
cycle of your Invertig 201 AC/DC has been exceeded. When
this lamp is illuminated, the machine will no longer weld
because the machine has overheated. Leave the machine
plugged in and turned on so the cooling fans can cool the unit
down. Allow the machine to cool for 15 to 30 minutes, the
thermoswitch should reset automatically and your Invertig will
be ready to weld.
4. Welding Volts - Digital Display
The Welding Volts Digital Display is a multi function display.
When you are welding, this displays the welding voltage.
Pressing other touch pad buttons will display other parameters
in the "VOLTS" display. Those displays will be covered in the
section covering those touch pad buttons.
5. Welding Amps - Digital Display
The Welding Amps Digital Display is a multi function display.
When you are welding, this displays welding amperage.
Pressing other touch pad buttons will display other parameters
in the “APMS” display. Those displays will be covered in the
section covering those touch pad buttons.
(Fig. 1)
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5
6. AC Welding Mode
Depressing the AC welding mode button will illuminate the
green “AC ON” light indicating your Invertig 201 is in the AC
welding mode.
To turn the AC Welding Mode off, depress the AC Welding
Mode button for at least 3 seconds until the green AC welding
mode light goes out.
7. Welding Mode Switch
The welding mode push button allows you to selects the welding
mode of your Invertig 201 AC/DC.
A) Stick Welding – this mode is used when stick electrode
welding. The electrode will always be hot and the gas
solenoid will not operate. The green “Welding Current”
lamp will be illuminated indicating the welding current
is on.
B) TIG 2T mode – With the torch trigger or foot pedal
depressed, your Invertig 201 will start the arc. When the
trigger is released, the unit will stop. Select this welding
mode for operation with the foot pedal or the torch mounted
amperage control. This will generally be the most common
mode of operation.
C) TIG 4T mode – This is like a lock on trigger on a drill or
grinder. This mode is generally used with a TIG torch which
has an trigger to start and stop the arc. It is generally not
used with a foot pedal or a torch mounted amperage control.
When you depress the trigger on the torch, your Invertig 201
provides pre-gas flow for as long as the trigger is depressed.
When the trigger is released, it will slope up to the welding
amperage that has been selected. When the trigger is depressed
again, the welding current will slope down to the final current.
As long as the trigger is depressed, your Invertig 201 will
continue to weld at the final current which has been selected.
When the trigger is released, the arc will extinguish, and the post
flow will start.
We do not recommend using the 4t mode with either the foot
pedal or the torch mounted amperage control.
D) TIG SPOT – the spot welding mode allows you to weld
for between 0.1 and 10 seconds and then the unit will
automatically stop. This would be a good selection if you
were performing a series of repetitive tack welds.
To select the spot welding time, adjust the “SPOT TIME”
buttons (#7) up or down to select a time between 0.1sec and
10.0 sec. Touching the “SPOT TIME” button will display
“Sl” for “Spot Time” in the “Volts” display (#4) and the
actual spot welding time in the "Amps" display (#5).
E) PROGRAM MODE – using a TIG torch which has a
trigger switch, the program mode allows you to switch
between 2 programmed welding amperages.
For example, lets say you have your welding current set at
150 amps, and your “FINAL CURRENT” set at 50% or
75 amps. Depress the trigger and you have pre-gas flow for
as long as you keep the trigger depressed. Release the
trigger and your TIG 201 will begin to weld at 150 amps.
Depress and release the trigger and you will go to your final
current of 75 amps. Depress and release the trigger again
and you will go back to 150 amps. To stop welding, depress
the trigger for 5 seconds or longer. When the trigger is
released the arc is extinguished and the machine will go into
post gas flow.
8. Adjustment Knob
This knob determines the welding amperage. The amperage
on your Invertig 201 can be adjusted from 5 to 200 amps. The
amperage is displayed in the digital display panel (#5) when the
remote switch (#14) is off.
When using a remote amperage control, the amperage
adjustment knob is used to select the maximum amperage
for your particular welding application. For example, when
welding .050" 6061 alloy aluminum, I adjusted the amperage
knob to 100 amps with the remote off. This is about 20% more
power than I will be welding the aluminum with. I then turned
the remote switch on (green “REMOTE ON” lamp is on) and
the digital display showed the minimum amperage of 5 amps.
If I were to depress the foot pedal completely, the maximum
amperage would now be 100 amps.
Setting the machine so the maximum amperage is 100 amps
vs the maximum output of the machine of 200 amps, the pedal
becomes less sensitive. More of a movement in the pedal
results in a smaller variance of the amperage, making it easier to
control the heat and therefore easier to control your puddle.
9. SLOPE DOWN or SPOT TIME Button
When the Welding Mode is in the TIG 2T Mode, TIG 4T Mode,
or the PROGRAM Mode, this button allows you to adjust the
slope down time from 0.1 sec to 10 sec. This is the amount
of time it will take for the welding amperage to go from the
welding amperage to the final current. To adjust the “SLOPE
DOWN” time, depress and release the “SLOPE DOWN”
Button. The “VOLTS” display will flash “SL” for slope, and
the “AMPS” display will flash and display the slope down
time in seconds. While both displays are flashing, adjust the
“AMPS” knob (#8) to set the slope down time.
NOTE: If you are using a torch mounted remote amperage
control or a foot pedal, it is advisable to set the slope down time
to 0.1 sec, as you are controlling the slope down manually with
your remote amperage control or foot pedal.

When the welding mode is in the TIG SPOT Mode this button
adjusts the spot welding time from 0.1 sec to 10.0 sec in 0.1 sec
increments. To adjust the “SPOT TIME”, depress and release
the “SLOPE DOWN or SPOT TIME” Button. The “VOLTS”
display will flash “St” for spot time, and the “AMPS” display
will flash and display the spot time in seconds. While both
displays are flashing, adjust the “AMPS” knob (#8) to set the
slope down time.
10. FINAL CURRENT Buttons
Depressing this button allows you to adjust the Final Current.
This is only applicable when your Invertig 201 is set in the
TIG 4T mode, PROGRAM mode, or pulse mode. The final
current is adjustable from 10% to 90% of the base current that
is set by the amperage adjustment knob (#8). For example, if
the amperage adjustment knob is set to 100 amps, and the final
current is set to 15%, the final current will be 15 amps.
To adjust the “FINAL CURRENT” time, depress and release
the “FINAL CURRENT” button. The “VOLTS” display will
flash “FC” for final current, and the “AMPS” display will flash
and display the final current in percent. While both displays are
flashing, adjust the “AMPS” knob (#8) to set final current in
percent of the base current.
11. POST GAS
The post gas flow is adjustable from .5 sec to 30 sec in 0.1 sec
increments. Post gas flow is necessary because after the arc
is extinguished; if the gas stopped flowing immediately, there
is a possibility the molten weld puddle would come in contact
with the atmosphere, causing weld defects. Additionally it
prevents the tungsten from becoming contaminated by the
atmosphere while it is still hot. The gas flow should run long
enough to allow the orange color of the tungsten to disappear.
It is important to remember not to remove the TIG torch
from the weld until the post gas cycle has been completed. A
good starting point for the post gas flow is 5.0 sec. If you are
welding at higher amperages or on more critical alloys it may
be necessary to increase the post gas flow to a higher value.
To adjust the “POST GAS” time, depress and release the
“POST GAS” button. The “VOLTS” display will flash “PG”
for post gas, and the “AMPS” display will flash and display
the post gas time in seconds. While both displays are flashing,
adjust the “AMPS” knob (#8) to set the post gas flow time in
seconds.
12. PULSE ON
By depressing the “PULSE ON” button, the green light will
illuminate indicating your Invertig 201 is in the pulse mode.
At this time the “VOLTS” display will show “dut” for the
pulsing duty cycle. The “ AMPS ” display will show “ FrE ” for
the pulsing frequency. Which ever display is flashing is the one
which can be adjusted by the amperage adjustment knob (#8). If
the “dut” is flashing and you want to adjust the frequency, simply
depress and release the “PULSE ON” button and the other
display will begin flashing and you will be able to adjust it.
To adjust the pulse duty cycle, depress and release the “PULSE
ON” button until “dut” which is displayed in the “VOLTS”
display is flashing. While the display is flashing, adjust the
“AMPS” knob (#8) to set the pulse duty cycle. Once the amps
knob is turned, the display will change from “dut” to display the
duty cycle in percent. The duty cycle can be adjusted from 30%
to 65% in increments of 5%.
To adjust the pulse frequency, depress and release the “PULSE
ON" button until “FrE” which is displayed in the “VOLTS”
display is flashing. While the display is flashing, adjust the
“AMPS” knob (#8) to set the pulse frequency. Once the amps
knob is turned, the display will change from “FrE” to display
the frequency in Hz. The frequency can be adjusted from 0.4
to 2.0 Hz in the AC mode, and from 0.4 to 300 Hz in the DC
mode.
To turn off the pulse mode, depress the “PULSE ON” button at
least 3 seconds until the green pulse light goes off.
13. AC Frequency Knob
The AC frequency knob adjusts the length of the AC square
wave. It can be adjusted from 20 Hz to 200 Hz without
any loss in welding output. When the AC is on, and the
“FREQUENCY” knob is adjusted, the amps display flashes and
becomes the frequency display.
Conventional transformer machines have their AC frequency
fixed at 60 Hz. It is beneficial to run the machine at the higher
frequencies (150 to 200hz) for the following reasons:
A) Produces a more focused arc that results in a narrower bead.
B) Heat is more concentrated, minimizing the heat
affected zone.
C) Allows you to weld aluminum with a 2% thoriated,
2% ceriated or 2% lanthanated tungsten sharpened to a point.
Arc is much more stable and is less likely to wander.
14. REMOTE ON
When the remote is on, the green indicator lamp will be
illuminated position, the amperage is infinitely adjustable by
either the foot pedal or the torch mounted amperage control.
It is possible to limit the maximum amperage of your TIG 201.
To limit the maximum amperage of the machine to 100 amps,
for example, with the foot pedal plugged in or torch mounted
amperage control plugged into the 5 pin connection, depress the
“REMOTE ON” button for 5 seconds until the green indicator
lamp turns off. Using the amperage adjustment knob (#8) adjust
the amperage to 100 amps. Depress the "REMOTE ON" button
for 5 seconds until the green indicator lamp turns on. The
digital display panel should read 5 amps. Now, when you fully
depress the foot pedal, the amperage displayed should be 100
amps. This makes the foot pedal less sensitive and makes
it easier to control your puddle.
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7
It is also possible to adjust the starting amperage. When you
push the remote on button, “rem” is flashing and displayed in
the “Volts” display (#4) and the starting amperage is flashing
and displayed in the “Amps” display (#5). While both displays
are flashing, adjust the amperage adjustment knob (#8) to adjust
the starting amperage. The starting amperage can be set to any
value as long as it is less than the maximum amperage.
When the remote is off, the green light will be off, and the
amperage will be adjusted by the amperage adjustment knob
(#8) on the front of the welder
15. HF ON
Depressing the “HF ON” button so the green light is illuminated
turns the high frequency arc starting on. When the foot pedal
is depressed, a high frequency arc will jump from the tungsten
to the ground, initiating the arc. This makes it very easy to
start the arc. Additionally, in the AC mode, the high frequency
is only used to start the arc, unlike conventional transformer
welders which must have the high frequency on all the time to
maintain the arc.
When the high frequency is off, it is possible to do “lift arc”
starting. The lift arc mode allows you to initiate the welding arc
without high frequency. This is important in any environment
where the high frequency arc will cause interference with
sensitive electrical components or computers. A good example
of this would be stainless steel or aluminum repair in hospitals.
The Lift Arc mode works for both AC and DC welding.
To TIG Weld using the Lift Arc Mode, simply touch the
tungsten to the workpiece, activate the torch trigger or depress
the foot pedal and lift off. When the tungsten breaks contact
with the work, the arc will start. You can also use this method
for Stick welding with the added benefit of being able to vary
your amperage with the foot pedal.
For Lift-Arc in aluminum, please remember the following
pointers to make arc ignition easier:
1. Keep the tungsten in contact with the workpiece for at least
5 seconds before lifting off the work piece.
2. When using remote amperage control, it is advisable to start
the arc at a much higher amperage than the actual welding
amperage. Once the arc has been established, reduce the
amerage to the welding amperage.
3. For Lift Arc at lower amperages, the correct tungsten
(2% Lanthanated) correct diameter, and a correctly ground
tungsten are very important.
4. A higher frequency (200 Hz) and higher balance (90%)
will make it easier to intitiate your arc.
16. AC Balance Knob
The AC Balance Knob lets you adjust the “balance” of the
positive part of the AC wave with respect to the negative part of
the AC wave. When the AC is on, and the “BALANCE” knob
is adjusted, the volts display flashes and becomes the balance
display. Your Invertig 201 allows you to adjust the AC balance
from 10% to 90%, a substantially greater range than is possible
with conventional transformer units (40% to 60%). When the
AC balance is set to 50%, the positive part of the AC wave and
the negative part of the AC wave are equal.
Setting the AC balance to a higher percentage (51 to 90 %)
increases the electrode negative portion of the wave (torch or
tungsten is negative, work piece is positive – the electrons flow
from the torch to the workpiece). This increases penetration,
lengthens the tungsten life, but reduces the cleaning portion of
the wave.
Setting the AC balance to a lower percentage (49 to 10%)
increases the electrode positive portion of the wave (torch or
tungsten is positive, work piece is negative – the electrons flow
from the workpiece to the torch). This increases the amount
of heat that builds up in the torch and shortens tungsten life,
decreases penetration, but increases the cleaning portion of
the wave.
Front Panel Controls

8
Front Panel Connections
1) Gas Output Connection
This is where you connect the gas fitting from the TIG Torch.
The gas output is controlled by the solenoid valve, which is
mounted inside the welder.
2) Negative Output Receptacle
When TIG welding, this is where the TIG Torch connects to
your Invertig 201 Welder. That’s right, we said the TIG Torch.
This is called straight polarity, with the torch negative and the
work positive. When using your Invertig Welder to TIG weld,
all work will be done in straight polarity.
When Stick Welding Direct Current Electrode Negative
(DCEN), the optional electrode holder will be plugged into the
negative output receptacle. When Stick Welding Direct Current
Electrode Positive (DCEP), the ground cable will be plugged
into the negative output receptacle
To install a cable into the negative output receptacle, insert the
male end of the cable into the negative output receptacle and
twist clockwise until snug.
3) 3 Pin Trigger Connection
This connection is used with TIG torches, which have on/off
triggers on the torch. Your Invertig 201 comes standard with a
footpedal which has the on/off function built into the pedal, so
an on/off trigger on the TIG torch is not necessary. Therefore,
this connection is not used.
4) Positive Output Receptacle
When TIG welding, this is where the ground cable connects to
the front of the TIG Adapter. That’s right, we said the ground
cable. This is called straight polarity, with the torch negative
and the work positive.
When Stick Welding Direct Current Electrode Negative
(DCEN), the ground cable will be plugged into the positive
output receptacle. When Stick Welding Direct Current
Electrode Positive (DCEP), the electrode holder will be plugged
into the positive output receptacle.
To install a cable into the positive output receptacle, insert the
male end of the cable into the positive output receptacle and
twist clockwise until snug.
5) 5 pin Footpedal Connection
this is where the footpedal connects to the Invertig 201. Insert
the connection into the machine and twist the lock ring to lock
into place.
Rear Panel Controls
1) On-Off Switch
This switch controls the input power to your Invertig Welder.
0 is off and 1 is on.
Shield Gas
TIG welding requires a shield gas of 100% Argon. A shield
gas is used to keep the surrounding atmosphere from coming
in contact with the molten weld puddle. The correct flow rate
is enough gas to shield the molten weld puddle and protect the
tungsten electrode. Any greater flow rate is a waste of shield
gas. Usually, the flow rate will be set anywhere between 15 and
30 cubic feet per hour (cfh).
Use a flowmeter as HTP Part #12020-F which is compatible
with Argon cylinders and has a barbed fitting for the delivery
hose. Connect a gas hose to the gas fitting at the rear of the
machine and to the barbed fitting on the regulator.
Your Invertig welder comes with a gas hose that connects the
TIG welder to the flowmeter. The input gas fitting is located
in the back of the welder.
If you will be welding thick
aluminum castings such as an
aluminum cylinder head, high
purity helium can be used.
When welding thick aluminum
sections like this and using
helium, to achieve added
penetration it should
be welded in DC.
1
2
3
4
5
Front Panel Connections

9
Tungsten Electrodes
With conventional transformer Tig welders, the general rule of
thumb is to use a pure tungsten (identified by a green tip) for
AC welding (generally aluminum), and a 2% thoriated tungsten
(identified by a red tip) for DC welding (generally steel
welding). However, with an inverter Tig welder, the ability
to control the frequency and balance over a much wider range
allows you to take advantage of the new “rare earth” tungsten
which is no available.
A 2% lanthanated or 2 % ceriated tungsten is the best tungsten
selection for both AC and DC welding with a modern inverter
power source.
HTP offers the following premium quality tungsten ground
to a high quality finish. All tungsten is 7" long and can be
purchased individually.
Pure Tungsten (TP) – green tip - Pure tungsten readily forms
a ball on the end. It is generally used with transformer based
power sources for AC welding of aluminum.
2% Thoriated Tungsten (TT2) – red tip - This tungsten is the
most common tungsten currently used. Generally used for DC
welding of steel and stainless steel. Draw back is it has a low
level radiation hazard. Offers good overall performance.
2% Ceriated Tungsten (TC2) – grey tip - 2% ceriated is an
excellent substitute for 2% thoriated tungsten if you are using a
transformer based power source for DC welding. More popular
for thinner materials because it requires less amperage to start.
Offers a stable arc. Can be used for both AC and DC welding
with inverter power sources.
2% Lanthanated Tungsten (TL2) – blue tip – 2% lanthanated is
probably the most popular substitute for 2% thoriated tungsten.
It offers good arc starting characteristics and longer life than
2% thoriated. Can be used for both AC and DC welding with
both inverter and transformer power sources.
Tungsten Type Diameter
.040" 1/16" 3/32" 1/8"
(1.0mm) (1.6mm) (2.4mm) (3.2mm)
Pure Tungsten TP-7040 TP-7116 TP-7332 TP-718
2% Thoriated TT2-7040 TT2-7116 TT2-7332 TT2-718
2% Ceriated TC2-7040 TC2-7116 TC2-7332 TC2-718
2% Lanthanated TL2-7040 TL2-7116 TL2-7332 TL2-718
Amperage - AC 20-30 30-80 60-130 120-200
Amperage - DC 15-50 50-120 80-150 130-250
The electrode should be sharpened to a point with a fine
grinding wheel. If the stone used for sharpening the electrode
is not clean, contaminants could lodge in the electrode and
dislodge when welding. The grinding wheel used for tungsten
electrodes should not be used for any other materials. When
grinding the electrode to a point, a 15 to 30 degree angle is
desired. The grinding marks should run lengthwise with the
point, opposed to in the direction of the diameter.
The HTP Tungsten Sharpener is an excellent tool for precisely
sharpening tungsten electrodes without any fear of contanimation.
Tungsten Sharpener

10
General Welding Parameters
Following are some “rule of thumb” welding parameters
tungsten diameters and amperage settings for welding different
thicknesses of aluminum and steel. Keep in mind these are
general settings and the specific application may require more
or less power to get the job done.
Aluminum
Tungsten Machine Welding Filler
Thickness Diameter Amperage Amperage Diameter
.030" .040" 50 30-40 1/16"
.050" 1/16" 70 50-60 1/16"
.062" (1/16") 1/16" 80 65-75 1/16"
.093" (3/32") 3/32" 120 105-115 1/16"
.125" (1/8") 3/32" 150 125-135 3/32"
.187" (3/16")* 1/8" 170 150-160 3/32"
.250" (1/4")* 1/8" 200 180 3/32"
.312" (5/16)* 1/8" 200 200 3/32"
* May require beveling – depends on joint
Steel
Tungsten Machine Welding Filler
Thickness Diameter Amperage Amperage Diameter
.030" .040" 50 30-40 .035"
.050" 1/16" 70 45-55 .035"
.062" (1/16") 1/16" 80 55-65 1/16"
.093" (3/32") 1/16" 110 80-90 1/16"
.125" (1/8") 1/16" 130 110-120 1/16"
.187" (3/16")* 1/16"-3/32" 150 130-140 1/16"
.250" (1/4")* 3/32" 170 150-160 3/32"
.312" (5/16)* 3/32"-1/8" 200 170-180 3/32"
.375" (3/8)* 1/8" 200 200 3/32"
* May require beveling – depends on joint
Quick Set Up
1) Welding Mode in 2T for foot pedal.
2) Steel welding AC off – Aluminum Welding AC on
3) Slope down – 0.1 seconds
4) Final Current – 1%
5) Post Gas Flow – 5 Sec
6) Frequency – 200 Hz for aluminum.
Not applicable for steel.
7) Balance – 60% for aluminum.
Not applicable for steel.
8) Remote – on
9) Ground clamp plugged into Positive recepticle
10) Tig Torch into Negative recepticle
11) Pulse off

11
Filler Rod forTIG Welding
HTP offers you high quality filler rods in affordable quantities.
All filler rod is packaged in 1lb air-tight plastic tubes to keep
your filler rod fresh and contaminant free. The tubes are
completely re-sealable.
In TIG welding, the filler rod is fed into the molten puddle by
hand. The choice of filler rod is extremely important as the
rod must correctly match the material and alloy you will be
welding. The thickness of the material to be welded determines
the diameter of the filler rod.
Here are some good rules of thumb to help you select the
correct filler metal:
1) 4043 is a good general filler metal for most aluminum
applications. Remember 2xxx and 7xxx series aluminum is
generally not recommended if the application requires
welding.
2) 5356 is used for 5xxx series aluminum and is generally
preferred if the finished piece will be anodized.
3) ER70S-6 is generally used for mild steel welding.
4) ER70S-2 is highly recommended for welding 4130
chrome-moly tubing in many applications.
5) ER80S-D2 is recommended for welding 4130 chrome-moly
tubing if a higher strength, less ductile weld is required. If
your weld will be heat treated to obtain optimum strength,
then use a filler metal which matches the chemistry of your
tubing, which neither 70S-2 nor 80S-D2 wires do.
6) Generally speaking, use a 1/16" diameter filler rod for
applications where the material is 1/8" and less. Use a 3/32"
diameter rod for 1/8" and thicker.
The following Filler Rod is available from HTP in 1 lb. tubes
which are tightly sealed to prevent oxidation.
Filler Rod
Part # Material
4043-1/16-1 4043 Alloy Aluminum Wire 1/16" x 36"
4043-3/32-1 4043 Alloy Aluminum Wire 3/32" x 36"
5356-1/16-1 5356 Alloy Aluminum Wire 1/16" x 36"
5356-3/32-1 5356 Alloy Aluminum Wire 3/32" x 36"
308L-035-1 308L Stainless Steel Wire .035" x 36"
308L-1/16-1 308L Stainless Steel Wire 1/16" x 36"
70S6-1/16-1 ER70S-6 Steel Wire 1/16" x 36"
70S6-3/32-1 ER70S-6 Steel Wire 3/32" x 36"
70S2-1/16-1 ER70S-2 Steel Wire 1/16" x 36"
80SD2-1/16-1 ER80SD-2 Steel Wire 1/16" x 36"

Tungsten Diameter
Illus # Description 0.040" 1/16" 3/32" 1/8"
Standard Configuration
1 Alumina Nozzle 10N49 10N48 10N47 10N46
2 Collet Body 10N30 10N31 10N32 10N28
3 Collet 10N22 10N23 10N24 10N25
Gas Lens Configuration (optional)
1A Alumina Nozzle 54N17 54N16 54N15 54N14
2A Gas Lens Collet Body 45V24 45V25 45V26 45V27
3 Collet 10N22 10N23 10N24 10N25
Short Configuration (optional)
1B Alumina Nozzle 13N08 13N09 13N10 13N11
2B Collet Body 17CB20 17CB20 17CB20 17CB20
3B Collet 13N21 13N22 13N23 13N24
Following parts fit all tungsten diameters
4 Cup Gasket (Std& Short) 18GC
Cup Gasket (Gas Lens) 3GHS
5 Torch Head SR-17
5A Flexible Torch Head SR-17F
6 O-Ring 98W18
7 Short Back Cap 300S
7A Medium Back Cap 300M
7B Long Back Cap 300L
8 Handle H-100
17 Series Air-Cooled Tig Torch Parts Breakdown
12

Tungsten Diameter
Illus # Description 0.040" 1/16" 3/32" 1/8"
Gas Lens Configuration (optional)
1 Alumina Nozzle 53N59 53N60 53N61 53N61S
2 Gas Lens Collet Body 45V42 45V43 45V44 45V45
3 Collet 13N21 13N22 13N23 13N24
Standard Configuration
1A Alumina Nozzle 13N08 13N09 13N10 13N11
2 Collet Body 13N26 13N27 13N28 13N29
3 Collet 13N21 13N22 13N23 13N24
Following parts fit all tungsten diameters
4 Cup Gasket 2GHS
5 Torch Head 20
5A Flexible Torch Head 20F
6 O-Ring 200R
7 Long Back Cap 200L
7A Medium Back Cap 200M
7B Short Back Cap 200S
8 Handle 20HR
20 Series Water Cooled Tig Torch Parts Breakdown
13

14
Duty Cycle Curve - HTP Invertig 201
0
10
20
30
40
50
60
70
80
90
100
110
120 130 140 150 160 170 180 190 200
Current (A)
Duty Cycle Curve HTP Invertig 201
Voltage/Amp Curve
HTP Invertig 201
Volt/Amp Curve - HTP Invertig 201
0
10
20
30
40
50
60
70
0 50 100 150 200 250
Amps
Series

TIG Torch Recirculating Water Cooling System
Pressure – 50 psi
Capacity – 2 gallons
Power Requirements – 230 VAC 1.5 amps 50/60 Hz
Cooling Capacity – 10,000 BTU (torches up to 250 amps)
Dimensions – 12" L x 14" W x 9" H
Weight – 30 lbs.
Water Fittings – 5/8 x 18 LH Inert Gas Fittings
Power Cord – 8 ft with 6-pin ILME connector
HTP Water Cooler -P/N 60070 HTP 201
Installation
Remove the reservoir cap and fill the reservoir tank with
HTP Coolant. HTP coolant has a pump lubricant designed
to lubricate and extend the life of the water pump. HTP
coolant also protects your cooling system from freezing
down to 10 Deg F. It is also recommended to use HTP’s
Eliminator which will prevent algae from growing in your
cooling system.
Install the 20 series torch into the negative output receptacle
on the front of the Invertig 201. The cooling line, which
comes out of the quick connector, is the Hot Water Out Line
from the TIG torch and should be connected to the Water
In connection on the water cooler. Note the threads are left
hand. Tighten using 2 wrenches. Since the seal is made
by the fitting and not the threads, do not use teflon tape.
The other cooling line, which runs directly into the Velcro
outer cover, is the Cool Water In Line. This line takes the
cool water from the water cooler and runs it directly to the
torch head. Connect this line to the Water Out connection
on the water cooler. Note the threads are left hand. Tighten
using 2 wrenches. Since the seal is made by the fitting and
not the threads, do not use teflon tape.
Connect the power cord to the back of the Invertig 201’s
6-pin ILME connector. When you turn on the Invertig
201, the water cooler will automatically turn on. Turn the
machine on and check for leaks.
15
Radiator (C2055)
Fan (F3075)
Motor (M2500)
Rotary Vane Pump
(P1200)
Water Out
Reservoir Cap (G1001)
Reservoir (S0450)
Water In

16
HTP Invertig 201 Parts Breakdown

17
HTP Invertig 201 Spare Parts List
Illus # Part # Description
1 66109 HANDLE
2 62500 LID
3 62483 INTERMEDIATE PANEL
4 62349 SIDE PANEL
5 610092 FRONT PANEL ASSEMBLY
6 613330 DRIVER PCB
7 610716 LOGIC PCB
8 62482 FRONT PANEL
9 660136 FRONT PLATE
11 66208 KNOB d.29
13 66121 KNOB d.22
14 63131 BRASS SUPPORT M4 X 15mm
15 63130 BRASS SUPPORT M4 X 10mm
16 61950 FILTER PCB FOR HF
17 61895 HF PCB
18 66160 GAS HOSE
19 65997 AUXILIARY TRANSFORMER
20 61702 COUPLING
21 64053 ON/OFF SWITCH
22 66537 LOGO PLATE
23 61733 LINE FILTER PCB
24 61703 SOLENOID VALVE
25 64274 SOCKET
26 66797 INSULATING PLATE
27 61457 INDUCTANCE
28 610643 PRIMARY POWER ASSEMBLY
29 61620 3 WAY ANPHENOL CONNECTOR
30 61623 5 WAY ANPHENOL CONNECTOR
31 66061 CORE HITCH
32 64182 MOTOR POWER FAN
33 66293 SIDE PLATE
34 62349 SIDE PANEL
35 61650 POWER SUPPLY CABLE
36 66098 GRID
37 62481 BASE
38 64518 ILME CONNECTOR
39 64519 6 WAY ILME
40 64520 PLUG
41 61732 CLIPPING RESISTANCES
42 61896 CONVERTER PCB
43 64215 THERMAL SWITCH 70°C
44 66501 FOOT
45 65776 THERMAL SWITCH 60°C
46 65774 THERMAL SWITCH 80°C
47 610628 SECONDARY POWER PCB
48 61049 TORCH SWITCH FILTER PCB

Pyrex Cup Kits
Nothing makes welding easier than being able to see what
you are doing. HTP’s Pyrex Cup kits do just that! The
clear Pyrex cup gives you unparalleled visibility of the arc
and work. The Pyrex Cup kit also comes standard with our
special gas saver gas lens kit. This unique system saves gas
while at the same time providing better gas coverage with a
more even and uniform gas flow. Eliminates gas turbulence
which can cause weld quality problems. Pyrex cup kits are
available to fit all standard torches. There is even a special
large diameter kit available for welding titanium.
Large Diameter Pyrex Cup Kits
Tungsten Diameter
Illus # Description 0.040" 1/16" 3/32" 1/8"
9 and 20 Series Tig Torches
1 Heat Shield 2HSGSLD 2HSGSLD 2HSGSLD 2HSGSLD
2 Wedge Collet PYR20C040 PYR20C116 PYR20C332 PYR20C18
3 Collet Body PYR20LDCB PYR20LDCB PYR20LDCB PYR20LDCB
4 Tungsten Adapter PYR040TA-LD PYR116TA-LD PYR332TA-LD PYR18TA-LD
5 Pyrex Cup PYR20LD PYR20LD PYR20LD PYR20LD
Complete Kit PYREX20LD-040 PYREX20LD-116 PYREX20LD-332 PYREX20LD-18
17, 18, and 26 Series Tig Torches
1 Heat Shield 4HSGSLD 4HSGSLD 4HSGSLD 4HSGSLD
2 Wedge Collet PYR17SC040 PYR17SC116 PYR17SC332 PYR17SC18
3 Collet Body PYR17LDCB PYR17LDCB PYR17LDCB PYR17LDCB
4 Tungsten Adapter PYR040TA-LD PYR116TA-LD PYR332TA-LD PYR18TA-LD
5 Pyrex Cup PYR17LD PYR17LD PYR17LD PYR17LD
Complete Kit PYREX17LD-040 PYREX17LD-116 PYREX17LD-332 PYREX17LD-18
Pyrex-Big Parts
18
Pyrex Parts

Tungsten Diameter
Illus # Description 0.040" 1/16" 3/32" 1/8"
For 9 and 20 Tig Torches
1 Pyrex Cup PYR8S PYR8S PYR8S PYR8S
2 Tungsten Adapter PYR040TA PYR116TA PYR332TA PYR18TA
3 Collet Body PYR20CB PYR20CB PYR20CB PYR20CB
4 Wedge Collet PYR20C040 PYR20C116 PYR20C332 PYR20C18
5 Heat Shield 2HSGS 2HSGS 2HSGS 2HSGS
Complete Kit PYREX20-040 PYREX20-1/16 PYREX20-3/32 PYREX20-1/8
For 17, 18, and Series 26 Tig Torches
Short Configuration
1 Pyrex Cup PYR8S PYR8S PYR8S PYR8S
2 Tungsten Adapter PYR040TA PYR116TA PYR332TA PYR18TA
3A Collet Body PYR17SCB PYR17SCB PYR17SCB PYR17SCB
3A Wedge Collet PYR17SC040 PYR17SC116 PYR17SC332 PYR17SC18
5A Heat Shield 3HSGS 3HSGS 3HSGS 3HSGS
Complete Kit PYREX17S-040 PYREX17S-1/16 PYREX17S-3/32 PYREX17S-1/8
Standard Configuration
1B Pyrex Cup PYR8L PYR8L PYR8L PYR8L
2 Tungsten Adapter PYR040TA PYR116TA PYR332TA PYR18TA
3B Collet Body PYR17LCB PYR17LCB PYR17LCB PYR17LCB
4B Wedge Collet PYR17LC040 PYR17LC116 PYR17LC332 PYR17LC18
5A Heat Shield 3HSGS 3HSGS 3HSGS 3HSGS
Complete Kit PYREX17-040 PYREX17-1/16 PYREX17-3/32 PYREX17-1/8
Pyrex Cup Parts
19

20
Flex Neck Tig Torch
Need to change the angle of your Tig torch to get into that
tight area? Trouble is, with a standard Tig torch you can’t.
Well, HTP has the answer: our Flex Neck Tig Torch. This
unique torch lets you bend the end of your Tig torch into
virtually any position, allowing you quick, easy access
to practically any tight, cramped or out-of-the-way spot.
Imagine how much easier your welding will be!
Swivelhead
Swivelhead
Action