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OPERATION
B-3 B-3
PRECISION TIG® 225
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PRODUCT DESCRIPTION
The PRECISION TIG® 225 is a member of our field
acclaimed PRECISION TIG® family of industrial arc welding
power sources. Premium features include:
1. Precise constant current output.
2. Full range square wave AC/DC TIG (GTAW) welding.
3. Enhanced version of the patented Micro-Start II™
Technology for its lower Minimum(5 amps) to higher
Maximum (230 amps) output control range.
4. Built-in high frequency stabilization for DC TIG starting
and continuous AC TIG welding.
5. AC/DC Stick (SMAW capability.) A new undercarriage
(with gas bottle rack) is available for field installation, or is
included with an available Ready-Pak TIG Welding
Package. The PRECISION TIG® patented convenient
built-in storage provisions for welding components and
cable management.
The PRECISION TIG® 225 also provides advanced features
such as:
• Digital Meter
• Presettable control, adjustable Auto Balance™
• Fan As Needed (F.A.N.)
• Timers for fixed Preflow and variable Postflow shielding
gas.
• Built-in, easy to set single knob Pulse TIG control with a
"blinking" light to indicate the pulse frequency setting.
• Auto-Sense remote control selection.
• Tool-less Twist-Mate™ electrode cable connection.
• Built-in work clamp cable permanently attached.
Four models are available for 60Hz. with Domestic and
Canadian input voltages, as well as an International model
with 50/60Hz voltages.
An Auxiliary 115vac Receptacle with Circuit Breaker are
included on the back panel of the PRECISION TIG® 225
models. The Canadian (K2533-2) and International (K2534-
1) models are rated 6 amps, while the 208/230/1/60 models
(K2533-1 and K2535-1/-2) are rated 20 amps (for use with
Lincoln’s 115v SP and Power MIG models).
RECOMMENDED PROCESSES AND EQUIP-
MENT
RECOMMENDED PROCESSES
The PRECISION TIG® 225 is recommended for the TIG
(GTAW) and Stick (SMAW) welding processes within its out-
put capacity range of 5 amps DC or AC to 225 amps AC/DC.
It is compatible with most Magnum TIG accessories, as well
as many industry standard items, such as TIG torches
(adapted for Twist-Mate™), hoses, and water coolers.
PROCESS LIMITATIONS
The PRECISION TIG® machines are not recommended for
arc gouging due to its limited output capacity, and are also
not recommended for pipe thawing.
RECOMMENDED EQUIPMENT/INTERFACE
(See Installed Options in Accessories Section for
more details)
The PRECISION TIG® 225 will be available as a basic
Machine (Only) and in two Factory-Configured Welding
Packages:
1. Machine(Only) (K2345-1)
2. Ready-Pak (K2347-1)
3. Ready-Pak w/Cart (K2347-2)
Basic module will also be available with Domestic, Canadian
and International input voltages for user configuration, with
optional accessories.
Select Machine 208/230/1/60 Machine with NEMA 6-50P
Plug Cable and Receptacle (K2533-1)
460/575/1/60 Machine only with cable (K2533-2)
380/400/415/1/50/60 Machine only
with cable (K2534-1)
Torch Starter Kit Air Cooled System: Water Cooled System:
(Select one) TIG-Mate TIG-Mate 20
Torch Starter Kit* Torch Starter Kit*
Water Cooler Not Applicable 115V 50/60Hz
Cool-Arc 40*
Under-Storage K2348-(*)
Cart (Optional )
Optional Remote Arc Start Switch*
Trigger Device Foot Amptrol*
(Select one) Start Pedal Foot Amptrol*
Hand Amptrol*
*For “Part Numbers” or “K Numbers” see Accessories Section.
EQUIPMENT LIMITATIONS
The PRECISION TIG® machines are protected from over loads
beyond the output ratings and duty cycles, per the Specifications
in the Installation Section, with Thermostat protection of the out-
put power coils and rectifiers.
The PRECISION TIG® 225 machine uses Twist-Mate™ output
terminals, therefore stud connection adapters (such as LECO.
S19257-series) cannot be used for torch connection.
If a PRECISION TIG® 225 is powered from an engine generator
which doesn’t have sufficient capacity, the AC Balance control
and the Output control will not provide full range of control.
WELDING CAPABILITY(Duty Cycle)
The PRECISION TIG® 225 is rated at 225 amps, 29 volts, at
10% duty cycle on a ten minute basis. It is capable of higher duty
cycles at lower output currents. See rated output graph,on
specification sheet located in the Installation Section. If the duty
cycle is exceeded, a thermal protector will shut off the output
until the machine cools.