Lincoln Electric Precision 375 User Manual

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Precision TIG® 375

TIG WELDERS

 

The Power To Perform!SM

With patented Micro-Start II® Technology, New and Improved AC Auto Balance®, built-in Advanced Control Panel, and Power Factor Correction on board, the Precision TIG® 375 delivers the Power To Perform!SM A load of new 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® 375 for

outstanding features and precise arc performance.

Processes

Stick, TIG

Advantage Lincoln

Output

AC

DC

Input

1

PHASE

60

Hz

50

Hz

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

 

 

 

 

Rated Output

 

 

Dimensions

 

 

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

 

 

 

 

 

 

AC: 2-420A

(787 x 559 x 660)

(230)

 

Precision TIG® 375

K2622-2

230/460/575/1/60

375A/35V/40%

102/51/41A with PFC

Max. OCV: 80V

 

 

 

 

 

 

 

 

K2623-1

220-230/380-400/

375A/35V/40%

119/69/63A with PFC

 

 

 

 

 

 

415/1/50/60

 

 

 

 

 

 

Precision TIG® 375

K2624-1

208/230/460/1/60

375A/35V/40%

112/102/51A with PFC

 

49.7 x 28 x 41

751

 

Ready-Pak® Package

 

 

 

 

 

(1262 x 711 x 1041)

(341)

 

 

 

 

 

 

 

 

 

 

 

P ublication

E3.51

11/07

 

 

 

 

 

 

 

 

 

W eb

Update

01/08

 

 

 

www

.lincolnelectric.com

 

 

 

A CLOSER LOOK

A RC PE RFO RM AN CE

M icr o- StartII™ Te ch nol o gy — More than ju sta starting aid.

Better control for starting, arc stability and crater fill.

IN NOW CLUDES for AC WALUMINUM ELDING

Great Starting

Micro-Start II™ Technology minimizes high frequency and ‘hot starts’ to deliver soft arc starts without arc wandering for AC and DC welding.

Stable, Focused Arc

Micro-Start II™ Technology aids arc stability THROUGHOUT THE WELD CYCLE –

even at the lowest amperage!

Precise Crater Fill

Micro-Start II™ Technology controlled ramp down helps precisely fill

the weld crater for quality results.

“ Set ItSee/ It” Pulse Con tro l — Make

attracti ve and c on sistentwe lds!

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

 

Welding Current

Background

 

High Heat

Low Heat

(Peak)

(Background)

Time

 

Smaller Heat

Affected Zone

 

Smaller Bead Profile

Standard TIG Weld

Pulsed TIG Weld

(at 60 amps)

(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.

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.

Maintaining a steady welding rhythm.

Easy “Set It/See It” Operation:

Flashing indicator light lets you see the pulse rate before you strike an arc.

 

 

 

 

 

 

Pr eci sion

TI G ® 375

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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A CLOSER LOOK

A

C

A uto Ba

lan

ce

® C on

trols —

A

u toma tical ly setsthe

op tima l clea ning vs. pen etration

le ve

l for alu

min

um

weld

ing !

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.

WELDING AMPERAGE

 

More Cleaning (+)

 

 

 

Less

 

Penetration(

-)

 

 

 

 

TIME

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WELDING AMPERAGE

 

Less Cleaning (+)

 

 

 

 

 

 

 

 

 

 

 

 

 

TIME

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

More Penetration (-)

 

 

 

Easy Operation:

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

Maximum Cleaning Setting Maximum Penetration

Auto Balance Setting

Setting

 

PERFORMANCE

Excellent stick welding performance.

Weld steel, stainless and low allow metals with ease.

Weld sheet metal, pipe and heavy plate.

Weld with Lincoln® Blue Max® Stainless,Excalibur® Low Hydrogen and Fleetweld® 5P welding electrodes.

Wider output range — for maximum flexibility:

2-420A DC, 2-420 AC.

More amperage than nearest competitorat 40% duty cycle — 25 amps more!

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

AC Auto Balance® is especially useful on critical aluminum applications.

 

 

 

 

 

 

Preci

sion

T IG ® 375

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[3]

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A CLOSER LOOK

FEATURES

Torch Parts Storage

Built-inTIG pulser helps you make great welds.

Compartment.

 

Easily accessible input voltage

Water-cooledtorch

reconnect panel.

connectionswith no adapters

 

— side mounted to keep out

 

of the way and protected.

Shown: K2624-1

Water-Cooled Ready-Pak® With Cart Package

Separate output studs for stick and TIG keep both stick electrode holder and TIG torch connected at the same time

— eliminates set-up changeover when switching processes.

Neat/organizedcable managementwith integratedtorch holster.

Optional Features:

(standard with K2624-1 Water-Cooled Ready-Pak® With Cart Package)

 

 

 

LockableUndercarriageStorageand Water-CoolerDrawers.

Low-Lift Shielding Gas Bottle

 

 

 

 

ReliablePro-Conpump.

Platform.

 

 

 

 

 

Pr eci sion TI G ® 375

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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A CLOSER LOOK

FE ATU

R E S, CON0T

.

Large, well-spaced controls make it easy to view and set up with gloved hands.

A B C D E

Key Controls

A)Minimum Output Preset Control & Display Switch (Also displays output voltage)

B)Set-Up Menu (see below)

C)Digital Amperage Meter

D)

Local/Remote Current Control Switch

R

 

E)

Maximum Output Preset Control

 

F)

Post Flow Time

 

G)

Thermal Shutdown Light

 

H)

Downslope Time

Q

I)

Pulse Background Current Control

P

J)

Pulse % On Time Control

O

K)

Spot Time

L)

Pulse Frequency Control

 

M)

Polarity Switch

 

N)

Power Switch

 

O)

Pulse/Spot Time Mode Switch

N

P)

Trigger Switch

 

Q)

AC Balance Control

M

R)

Mode Switch

 

S)

Remote Receptacle (not shown)

 

F

G

H

I

J & K

L

SET- U P ME NU

Press and hold the menu button to display up to seven programmable parameters. The setting of the desired level is displayed, and increasing or decreasing the level setting is easy.

The Set-Up Menu includes:

DC TIG Start Modes: High Frequency, Scratch Start, and Touch Start TIG™.

Adjustable Preflow Time.

Adjustable Start Pulse for Soft or Forceful Starts.

Adjustable TIG Hot Start.

Adjustable Upslope Time.

Adjustable Stick Hot Start.

Adjustable Stick Arc Force.

 

 

 

 

 

 

Preci

sion

T IG ® 375

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[5]

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A CLOSER LOOK

QUALITY AND RELIABILITY

Fan-As-Needed™(F.A.N.)minimizesrepeatedheatingand cooling of internalcomponents,keeps dust and dirt build-upto a minimum and saves on electricitycosts.

Engineeredcoolingair routingbrings clean air in from the top and exhaustsat the bottom to draw and collectless dirt in the machine (see photo at right), unlike competitivesystemswith a vacuum cleaner-likefloor intake.

Comparethese reliabilityenhancingdesign features:

Crimpedand solderedpower connections.

Woundand varnishedelectricalcoils do not requirecoil spacers to remainsecure.Competitivemodels use wooden coil spacers that can loosen over time.

Lockingtabs on PC board connectorseliminatesloose connections.

Toughtestingcycles ensurelong service — dropping,jerking, rolling,shipping,vibration,resistanceto real world extreme conditions,and extendedin-servicelife testing.

Line VoltageCompensationholds output settingconstantto maintainweld qualityeven when the input voltagefluctuates±10%.

CSA C/US certified.

Lincolnthree-yearwarrantyon parts and labor.Two-yearextended warrantyavailablein the U.S.

Clean, cool air route shown.

Snap-action durable switches make positive mechanical contact to reduce chances of intermittent contact failure.

SYSTEM SELECTION

Ready-Pak® Package

Takethe hassle out of ordering.Order a Ready-Pak® pre-assembled welding package.

PrecisionTIG® 375 Water-CooledReady-Pak® Package

One product number (K2624-1) gets you all this:

PrecisionTIG® 375 (208/230/460/1/60)K2622-1

Under-CoolerCart Water Cooler K1828-1

Foot Amptrol® – K870

Gas Regulator/Flowmeter& 10 ft. (3.0 m) Hose Kit – 3100211

PTW-20 Pro-Torch™TIG Torch(250 amp, 25 ft.) K1784-4

ZipperedTorchCover K918-2

Parts Kit – KP510

Water Hose (2 included) S19558-4

15 ft. (4.5m), 2/0 Work Cable and Clamp K2150-1

Adapter for optional PTA-9or 17 Torch(3/8”) S20403-4

Order K2624-1

Shown: K2624-1

Water-Cooled Ready-Pak® Package

 

 

 

 

 

 

Pr eci sion

TI G ® 375

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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RECOMMENDED OPTIONS

GENERAL OPTIONS

Under-CoolerCart WaterCooler

Includes“cooler-in-a-drawer”with hoses and a lockablestoragedrawer on a dual bottle undercarriage.Two gallon (7.5 ltrs.) capacity.

Order K1828-1

Undercarriage

Includesa dual bottle rack with chain and front casters,rear wheels and a handle.

Order K1869-1

Harris® Argon FlowmeterRegulator

Deluxe flowmeter/regulator.Includes 10 ft. (3.0 m) hose.

Order 3100211

Work Clamp & Cable Assembly

15 ft. 2/0 cable with 1/2” stud lug and work clamp.

Order K2150-1

STICK OPTIONS

AccessoryKit

For stick welding.Includes35 ft. (10.7 m) 2/0 electrodecable with lug, 30 ft. (9.1 m) 2/0 work cable with lugs, headshield,filter plate, work clamp and electrodeholder.400 amp capacity.

Order K704

AccessoryKit

For stick welding.Includes20 ft. (6.1 m) #6 electrodecable with lug,

15 ft. (4.6 m) #6 work cable with lugs, headshield,filter plate, work clamp, electrodeholder and sample pack of mild steel electrode.150 amp capacity.

Order K875

Remote Output Control

Consistsof a controlbox with choice of two cable lengths.Permitsremote adjustmentof output. 6 pin connection.

Order K857 for 25 ft. (7.6 m) Order K857-1 for 100 ft. (30.5 m)

TIG OPTIONS

Magnum® Pro-Torch™ TIG Torches

A full line of air-cooledand watercooled torchesavailable.

RequestpublicationE12.150

PTA-26One-CableAdapter

Adapts the 7/8” PTA-26fittingto the 5/8” gas and power connectionon machine.

Order K2166-1

PTA-9,-17 One-CableAdapter

Adapts the 3/8" PTA-9or -17 fitting to the 5/8" gas and power connectionon machine.

Order K2166-3

PTA-9,PTA-17,PTA-26Two-Cable Adapter

Convertsthe 7/8" water and power connectionon the machineto a 1/2" output stud for use with a two-cable air-cooledTIG torch.

Order K2166-2

Foot Amptrol®

Variescurrentfor making criticalTIG welds. Depresspedal to increase current.Depressingpedal fully achievesmaximumset current.Fully raisingthe pedal finishesthe weld and starts the afterflowcycle. Includes25 ft. (7.6 m) controlcable. 6-pin plug connection.

Order K870

Hand Amptrol®

Provides25 ft. (7.6m) of remote currentcontrolfor TIG welding(6 pin plug connection).Velcrostraps securetorch.

Order K963-3 (One size fits all ProTorchTIG Torches.)

Arc Start Switch

Needed if an Amptrolis not used when TIG welding.Comes with a 25 ft. (7.6 m) cable. Attachesto the TIG torch for convenientfinger control. 6-pin plug connection.

Order K814

 

 

 

 

 

 

Preci

sion

T IG ® 375

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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RECOMMENDED OPTIONS

PRECISION TIG® 375 ORDER FORM

PRODUCT DESCRIPTION

ORDER NUMBER

QUANTITY

PRICE

Precision TIG® 375

(208/230/460/1/60)

K2622-1

 

 

Precision TIG® 375

(230/460/575/1/60)

K2622-2

 

 

Precision TIG® 375

(220-230/380-400/415/1/50/60)

K2623-1

 

 

Ready-Pak® Package

 

 

 

Precision TIG® 375

(208/230/460/1/60)

K2624-1

 

 

Recommended General Options

 

 

 

Under-Cooler Cart Water Cooler

K1828-1

 

 

Undercarriage

 

K1869-1

 

 

Work Clamp and Cable Assembly

K2150-1

 

 

Recommended Stick Options

 

 

 

Stick Accessory Kit,

400 amps

K704

 

 

 

150 amps

K875

 

 

Remote Output Control, 25 ft. (7.6 m)

K857

 

 

 

100 ft. (30.5 m)

K857-1

 

 

Recommended TIG Options

 

 

 

Pro-Torch™ Water-Cooled TIG Torches (No adapter required.)

See publication E12.150

 

 

Pro-Torch™ Air-Cooled TIG Torches (Specific adapter required.)

See publication E12.150

 

 

PTA-26 One-Cable Adapter

K2166-1

 

 

PTA-9, -17 One-Cable Adapter (Included with machine.)

K2166-3

 

 

PTA-9, -17, -26 Two-Cable Adapter

K2166-2

 

 

Water Solenoid Kit

 

K1830-1

 

 

Harris® Argon Flowmeter Regulator

3100211

 

 

Foot Amptrol®

 

K870

 

 

Hand Amptrol®

 

K963-3

 

 

Arc Start Switch

 

K814

 

 

Cut Length Consumables

See publication C9.10

 

 

 

 

TOTAL:

 

 

 

 

 

 

 

C U S TO MER A SS IST A NC E PO LI CY

The business of The Lincoln Electric Company® is manufacturing and selling high quality welding equipment, consumables, and cutting equipment. Our challenge is to meet the needs of our customers and to exceed their expectations. On occasion, purchasers may ask Lincoln Electric for information or advice about their use of our products. Our employees respond to inquiries to the best of their ability based on information provided to them by the customers and the knowledge they may have concerning the application. Our employees, however, are not in a position to verify the information provided or to evaluate the engineering requirements for the particular weldment. Accordingly, Lincoln Electric does not warrant or guarantee or assume any liability with respect to such information or advice. Moreover, the provision of such information or advice does not create, expand, or alter any warranty on our products. Any express or implied warranty that might arise from the information or advice, including any implied warranty of merchantability or any warranty of fitness for any customers’ particular purpose is specifically disclaimed.

Lincoln Electric is a responsive manufacturer, but the selection and use of specific products sold by Lincoln Electric is solely within the control of, and remains the sole responsibility of the customer. Many variables beyond the control of Lincoln Electric affect the results obtained in applying these types of fabrication methods and service requirements.

Subject to Change – This information is accurate to the best of our knowledge at the time of printing. Please refer to www.lincolnelectric.com for any updated information.

THE LI NCO LN ELE CT RIC COMP AN Y

22801 St. Clair Ave., Cleveland, OH 44117-1199 • 216.481.8100 • www.lincolnelectric.com