Lincoln Electric Precision 375 User Manual

Precision TIG®375

PHASE

The Power To Perform!

With patented Micro-Start II®Technology, New and Improved AC Auto

Balance board, the Precision TIG

features, simple controls, innovative accessory storage, and attractive and consistent welds support this welder’s position as the best in class. Whatever the TIG welding application–fabrication, aerospace, production, motorsports, or vocational education–choose the Precision TIG outstanding features and precise arc performance.

Processes

Stick, TIG

Advantage Lincoln

, built-in Advanced Control Panel, and Power Factor Correction on

375 delivers the Power To Perform!SMA load of new

375 for

TIG WELDERS

Output

Input

Precision Arc Performance:

• Patented Micro-Start II™ Technology delivers extremely stable low amperage starting, welding and cratering for both AC and DC welding.

• Selectable welding modes such as high frequency, scratch start, and Touch Start TIG

• High duty cycles–375 amps at 40% duty cycle.

• Widest welding range in its class 2-420 amps for both AC and DC.

• Advanced Control Panel. TIG pulser allows you to control heat input for any weld.

• Standard power factor correction capacitors lower input currents when welding at higher output.

• Excellent stick welder–even with Fleetweld

5P (E6010) with new

Automatic Hot Start™ and Auto Adaptive Arc Force™ controls.

Simple Controls – Easy to Use:

• Redesigned controls are simple and well-spaced for effortless setting changes.

• Hidden menu button features 7 programmable parameters without cluttering the control panel.

• New and Improved AC Auto Balance

has been readjusted to have

more penetration and improved bead appearance.

• Spot On Timer provides adjustable arc for consistent spot welds.

Professional Features:

• The K2624-1 Ready-Pak

model Precision TIG®375 (208/230/460/1/60). Under-Cooler Cart Water Cooler, Foot Amptrol®, Gas Regulator/Flowmeter & Hose Kit, PTW-20 Pro-Torch™ TIG Torch (250 amp, 25 ft.), Zippered Torch Cover, Parts Kit, Water Hose (2 included) 15 ft., and 15 ft. 2/0 Work Cable and Clamp.

• 115 volt auxiliary power receptacles. Great for powering an optional water cooler or power tools.

• Add an optional Under-Cooler Cart for extra storage and water-cooled applications.

• Built-in storage compartment for torch consumables.

• Water-cooled torch connections with no adapters required–side mounted, out of the way, and well protected.

• Neat/organized cable management with integrated torch holster.

Superb Quality:

• Fan-As-Needed™ (F.A.N.) prevents overheating. F.A.N. reduces power consumption noise, motor wear and dust in the machine.

• CSA C/US certified.

• Three-Year Lincoln Warranty on parts and labor. Two-year extended warranty available in the U.S.

TECHNICAL SPECIFICATIONS

Product Product Current/Voltage/Duty Cycle Input Current @ H x W x D Net Weight

Name Number Input Power (104°F, 40°C) Rated Output Output Range inches (mm) lbs (kg)

K2622-1 208/230/460/1/60 375A/35V/40% 112/102/51A with PFC DC: 2-420A 31 x 22 x 26 507

Precision TIG

Ready-Pak

375 K2622-2 230/460/575/1/60 375A/35V/40% 102/51/41A with PFC

K2623-1 220-230/380-400/ 375A/35V/40% 119/69/63A with PFC

375 K2624-1 208/230/460/1/60 375A/35V/40% 112/102/51A with PFC 49.7 x 28 x 41 751

Package (1262 x 711 x 1041) (341)

415/1/50/60

Rated Output Dimensions

AC: 2-420A (787 x 559 x 660) (230)

Max. OCV: 80V

Publication E3.51 11/07

Web Update 01/08

www.lincolnelectric.com

A CLOSER LOOK

ARC PERFORMANCE

icro-Start II™ Technology — More than just a starting aid.

Better control for starting, arc stability and crater fill.

reat Starting

icro-Start II™ Technology minimizes high

frequency and ‘hot starts’ to deliver soft arc starts

without arc wandering for AC and DC welding.

table, Focused Arc

icro-Start II™ Technology aids arc stability

THROUGHOUT THE WELD CYCLE –

even at the lowest amperage!

“Set It/See It” Pulse Control — Make attractive and consistent welds!

What Is It?

Pulse welding systems vary weld current between peak (high heat) and background current (low heat) levels. Adjusting the pulse frequency controls the level of heat input applied to the weld relative to the weld travel speed.

Results

Better control of heat input in the weld, resulting in:

• Reduced warping and burnthrough on thin materials.

• Smaller heat-affected zone – good for thin material.

• Smaller bead profile without compromising proper penetration.

PULSE FREQUENCY:

Number of Pulses Per Second

Peak

recise Crater Fill

icro-Start II™ Technology

controlled ramp down helps precisely fill

the weld crater for quality results.

Smaller Heat

Affected Zone

Smaller Bead Profile

Background

Standard TIG Weld

(at 60 amps)

Pulsed TIG Weld

(at 60 amps)

Great For

• Thin materials – Faster pulse settings help to narrow the bead

profile and minimize the heat-affected zone and resulting warping or burnthrough.

Welding Current

• Consistent appearance – Slower pulse settings aid in timing the

application of filler metal to produce the consistent stacked bead appearance associated with high quality TIG welding.

High Heat

(Peak)

Low Heat

(Background)

• Maintaining a steady welding rhythm.

Easy “Set It/See It” Operation:

• Flashing indicator light lets you see the

Time

pulse rate before you strike an arc.

Precision TIG®375

[2]

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A CLOSER LOOK

AC Auto Balance®Controls — Automatically sets the optimal cleaning vs. penetration level for aluminum welding!

What Is It?

When aluminum welding, the positive (+) portion of the AC welding amperage cleans the oxides from the aluminum surface. The negative (-) portion delivers more heat input, increasing penetration level.

Patented AC Auto Balance®automatically sets the ratio of cleaning action (+) versus penetration (-) based on amperage.

Manual balance control provides the flexibility to customize the arc to your preference.

ore Cleaning (+)

TIME

Easy Operation:

• Set it and forget it or override when you choose to customize the settings.

aximum Cleaning Setting

aximum Penetration

Setting

uto Balance Setting

WELDING

AMPERAGE

Less Penetration(-)

Less Cleaning (+)

TIME

WELDING

AMPERAGE

More Penetration (-)

PERFORMANCE

• Excellent stick welding performance. — Weld steel, stainless and low allow metals with ease.

— Weld sheet metal, pipe and heavy plate. — Weld with Lincoln

Hydrogen and Fleetweld®5P welding electrodes.

• Wider output range — for maximum flexibility:

— 2-420A DC, 2-420 AC.

• More amperage than nearest competitor at 40% duty cycle — 25 amps more!

• Lower input current draw compared to nearest competitor — up to 10% less current with 40% more duty cycle.

Blue Max®Stainless, Excalibur®Low

[3]

AC Auto Balance®is especially useful on

critical aluminum applications.

Precision TIG®375

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