Lincoln-electric IM936 PRECISION TIG 375 User Manual

PRECISION TIG 375OPERATORʼS MANUALIM936February, 2012Safety Depends on YouLincoln arc welding and cuttingequipment is designed and builtwith safety i

A-3INSTALLATION PRECISION TIG®375A-3SAFETY PRECAUTIONSSELECT SUITABLE LOCATIONPlace the welder where clean cooling air can freely cir-culate in thro

INPUT and GROUNDING CONNECTIONSBe sure the voltage, phase, and frequency of the inputpower is as specified on the rating plate, located on therear of

A-5INSTALLATION PRECISION TIG®375A-5Recommended Cable Sizes for Combined Lengths ofCopper Work and Electrode Cables using 75oC Wire:Machine Rating 0

A-6INSTALLATION PRECISION TIG®375A-6TIG TORCH CONNECTIONThe Precision TIG®torch connection box, located onthe right side of the machine, provides al

Torch AdapterAir Cooled TorchOUTPUT (front) PanelELECTODE AND COOLANT IN 7/8-14 LHCOOLANT OUT 5/8-18 LH ELECTODE AND/OR GAS OUTPUT

A-8INSTALLATION PRECISION TIG®375A-8ROBOTIC INTERFACE CONNECTIONRobotic interface can be made at the RemoteReceptacle (See Operation Section B-2). T

B-1OPERATIONB-1PRODUCT DESCRIPTIONThe Precision TIG®375 is part of a family of industrialarc welding power sources providing constant current,single r

B-2OPERATIONB-2RECOMMENDED PROCESSES ANDEQUIPMENTRECOMMENDED PROCESSESThe Precision TIG®375 is recommended for the TIG(GTAW) and Stick (SMAW) welding

B-3OPERATIONB-31. POWER SWITCH - Input line switch turns inputpower ON or OFF, as indicated by the on or off sta-tus of the front panel displays.2. PO

B-4OPERATIONB-4• When the Polarity Switch is set to DC (- or +), theTIG mode provides high frequency only for starting.Hi-Freq. turns on after pre-fl

FOR ENGINEpowered equipment.1.a. Turn the engine off before troubleshooting and maintenancework unless the maintenance work requires it to be running.

B-5OPERATIONB-5PRECISION TIG®375DIGITAL DISPLAYDIGITAL DISPLAYSELECTSELECTDISPLAYDISPLAY SET SETDISPLAYDISPLAY7a MENU BUTTON AND DISPLAY SWITCH

B-6OPERATIONB-6PRECISION TIG®3758. DIGITAL METER AND DISPLAY SWITCH– A (3-digit) LED meter is used to monitor the preset andactual welding procedure b

B-7OPERATIONB-7• In 4-Step position allows welding without continu-ously holding the start switch trigger. The arc startswitch functions in the follo

B-8OPERATIONB-8INTERNAL SET UP CONTROLSPrecision TIG®375 Advanced Panel has the followingadditional control features which are set up using theDIP Swi

B-9OPERATIONB-9PRECISION TIG®375(With DIP Switch #2 ON, As Shipped)(With DIP Switch #2 OFF)FIGURE B.3

B-10OPERATIONB-10PRECISION TIG®375FIGURE B.4(With DIP Switch #3 OFF, As Shipped)(With DIP Switch #3 ON)

B-11OPERATIONB-11SETUP GUIDELINES FOR TIG WELDINGWITH AN AMPTROLBoth the Hand and Foot Amptrols work in a similarmanner. They are meant to be used for

B-12OPERATIONB-12PRECISION TIG®375Max. to Min.AmptrolMin. to Max.AmptrolSetup for TIG Amptrol WeldingAdvanced Panel(If used)Standard ControlsPower Swi

B-13OPERATIONB-13PRECISION TIG®375RECOMMENDED ELECTRODE AMPERAGE RANGES - Precision TIG®375SMAW ProcessELECTRODE POLARITY 3/32" 1/8" 5/32&q

C-1ACCESSORIESC-1OPTIONAL EQUIPMENTFACTORY INSTALLED OPTIONSThe basic Precision TIG®375 machine is factoryequipped with:• K2621-1 Precision TIG Advanc

iiSAFETYiiARC RAYS can burn.4.a. Use a shield with the proper filter and coverplates to protect your eyes from sparks andthe rays of the arc when weld

D-1MAINTENANCED-1PRECISION TIG®375ELECTRIC SHOCK can kill.• Only qualified personnel shouldperform this maintenance.• Turn the input power OFF at thed

D-2MAINTENANCED-2SERVICE PROCEDURESOperation of the Precision TIG should be trouble-freefor the life of the machine. Should a malfunction occur,howev

DO NOT use a volt-ohm meter to measure output voltages in TIG mode. TheHigh Frequency Arc Starter voltage can damage the meter.CAUTIONE-1TROUBLESHOOTI

E-2TROUBLESHOOTINGE-2PRECISION TIG®375Observe all Safety Guidelines detailed throughout this manualIf for any reason you do not understand the test pr

E-3TROUBLESHOOTINGE-3PRECISION TIG®375Observe all Safety Guidelines detailed throughout this manualIf for any reason you do not understand the test pr

E-4TROUBLESHOOTINGE-4PRECISION TIG®375Observe all Safety Guidelines detailed throughout this manualIf for any reason you do not understand the test pr

E-5TROUBLESHOOTINGE-5PRECISION TIG®375Observe all Safety Guidelines detailed throughout this manualIf for any reason you do not understand the test pr

E-6TROUBLESHOOTINGE-6PRECISION TIG®375Observe all Safety Guidelines detailed throughout this manualIf for any reason you do not understand the test pr

E-7TROUBLESHOOTINGE-7PRECISION TIG®375Observe all Safety Guidelines detailed throughout this manualIf for any reason you do not understand the test pr

F-1WIRING DIAGRAMF-1PRECISION TIG®375NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual. The

iiiSAFETYiiiFOR ELECTRICALLYpowered equipment.8.a. Turn off input power using the disconnectswitch at the fuse box before working onthe equipment.8.b.

F-2DIMENSION PRINTF-2PRECISION TIG®375L11660XB-UF** LOCATION OF (4) O.284 BASE MOUNTING HOLES.12.7731.0026.001.00 24.00 **.283.4720.50 **22.00.30.753

NOTESPRECISION TIG®375

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ivSAFETYivPRÉCAUTIONS DE SÛRETÉPour votre propre protection lire et observer toutes les instructionset les précautions de sûreté specifiques qui parra

vvThank Youfor selecting a QUALITY product by Lincoln Electric. We want youto take pride in operating this Lincoln Electric Company product •••as much

TABLE OF CONTENTSPage.Installation ...Section

A-1INSTALLATION PRECISION TIG®375A-1TECHNICAL SPECIFICATIONS-Precision TIG®375 (K2623-1 Export-50/60Hz)Voltage + 10%220-230/380-400/415Max. Amps Wi

A-2INSTALLATION PRECISION TIG®375A-2Height Width Depth Weight31.0 in. 22.0 in. 26.0 in. 507 lbs.787 mm 559 mm 660 mm 230 kgs.PHYSICAL DIMENSIONS1ALS