Lincoln Electric IM702-A User Manual

PRECISION TIG 275OPERATOR’S MANUALIM702-AJune, 2005Safety Depends on YouLincoln arc welding and cuttingequipment is designed and builtwith safety in m

A-3INSTALLATION PRECISION TIG 275A-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 275A-5Recommended Cable Sizes for Combined Lengths ofCopper Work and Electrode Cables using 75oC Wire:Machine Rating 0

A-6INSTALLATION PRECISION TIG 275A-6TIG TORCH CONNECTIONThe Precision TIG torch connection box, located on theright side of the machine, provides al

A-7INSTALLATION PRECISION TIG 275A-7AUXILIARY POWER CONNECTIONSThe Precision TIG machines provide a standard NEMA5-15R duplex receptacle, located on

A-8INSTALLATION PRECISION TIG 275A-8ROBOTIC INTERFACE CONNECTIONRobotic interface can be made at the RemoteReceptacle (See Operation Section B-2). T

B-1OPERATIONB-1PRODUCT DESCRIPTIONThe Precision TIG 275 is part of a new family of indus-trial arc welding power sources providing constant cur-rent,

B-2OPERATIONB-2RECOMMENDED PROCESSES ANDEQUIPMENTRECOMMENDED PROCESSESThe Precision TIG 275 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-58. DIGITAL METER AND DISPLAY SWITCH– A3-digit LED meter is used to monitor the preset andactual welding procedure based on the Displa

B-6OPERATIONB-6• In 4-Step position allows welding without continu-ously holding the start switch trigger. The arc startswitch functions in the follo

B-7OPERATIONB-7INTERNAL SET UP CONTROLSPrecision TIG 275 models which have an AdvancedPanel (K1829-1) option installed* have the followingadditional c

B-8OPERATIONB-8PRECISION TIG 275(With DIP Switch #2 ON, As Shipped)(With DIP Switch #2 OFF)FIGURE B.3

B-9OPERATIONB-9PRECISION TIG 275FIGURE B.4(With DIP Switch #3 OFF, As Shipped)(With DIP Switch #3 ON)

B-10OPERATIONB-10SETUP GUIDELINES FOR TIG WELDINGWITH AN AMPTROLBoth the Hand and Foot Amptrols work in a similarmanner. They are meant to be used for

B-11OPERATIONB-11PRECISION TIG 275Max. to Min.AmptrolMin. to Max.AmptrolSetup for TIG Amptrol WeldingAdvanced Panel(If used)Standard ControlsPower Swi

B-12OPERATIONB-12PRECISION TIG 275RECOMMENDED ELECTRODE AMPERAGE RANGES - PRECISION TIG 275SMAW ProcessELECTRODE POLARITY 3/32" 1/8" 5/32&q

C-1ACCESSORIESC-1OPTIONAL EQUIPMENTFACTORY INSTALLED OPTIONSThe basic Precision TIG 275 machine is factoryequipped with:• A 3/8" Adapter (S20403-

D-1MAINTENANCED-1PRECISION TIG 275ELECTRIC SHOCK can kill.• Only qualified personnel shouldperform this maintenance.• Turn the input power OFF at thed

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-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 275Observe all Safety Guidelines detailed throughout this manualIf for any reason you do not understand the test pr

E-3TROUBLESHOOTINGE-3PRECISION TIG 275Observe all Safety Guidelines detailed throughout this manualIf for any reason you do not understand the test pr

E-4TROUBLESHOOTINGE-4PRECISION TIG 275Observe all Safety Guidelines detailed throughout this manualIf for any reason you do not understand the test pr

E-5TROUBLESHOOTINGE-5PRECISION TIG 275Observe all Safety Guidelines detailed throughout this manualIf for any reason you do not understand the test pr

E-6TROUBLESHOOTINGE-6PRECISION TIG 275Observe all Safety Guidelines detailed throughout this manualIf for any reason you do not understand the test pr

E-7TROUBLESHOOTINGE-7PRECISION TIG 275Observe all Safety Guidelines detailed throughout this manualIf for any reason you do not understand the test pr

F-1WIRING DIAGRAMF-1PRECISION TIG 275RECEPTACLECAB BCONTROL PC BOARD 10K A-BFEDCAT MINIMUMDFREMOTETMAMPTROLOPTIONALAEREMOTEABCDEF+-GRGY54321(STICK)(A

F-2WIRING DIAGRAMF-2PRECISION TIG 275RECEPTACLECAB BCONTROL PC BOARD 10K A-BFEDCAT MINIMUMDFREMOTETMAMPTROLOPTIONALAEREMOTEABCDEF+-GRGY54321(STICK)(A

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

F-3WIRING DIAGRAMF-3PRECISION TIG 275NOTE: This diagram is for reference only. It may not be accurate for all machines covered by this manual. The

F-4DIMENSION PRINTF-4PRECISION TIG 27549.6727.1627.9740.963.47L11799XA45.316.8418.675.8613.4543.20K1825-1 DOMESTIC PACKAGE

F-5DIMENSION PRINTF-5PRECISION TIG 275L11660XB-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 275

WARNINGAVISO DEPRECAUCIONATTENTIONWARNUNGATENÇÃOSpanishFrenchGermanPortugueseJapaneseChineseKoreanArabicREAD AND UNDERSTAND THE MANUFACTURER’S INSTRUC

WARNINGAVISO DEPRECAUCIONATTENTIONWARNUNGATENÇÃOSpanishFrenchGermanPortugueseJapaneseChineseKoreanArabicLEIA E COMPREENDA AS INSTRUÇÕES DO FABRICANTE

• Sales and Service through Subsidiaries and Distributors Worldwide •Cleveland, Ohio 44117-1199 U.S.A. TEL: 216.481.8100 FAX: 216.486.1751 WEB

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 275A-1TECHNICAL SPECIFICATIONS-PRECISION TIG 275 (K1825-1 Domestic Package*-60Hz)(K1826-1 Domestic,K1826-2 Canadian-60

K1826-1, -2K1827-1K1825-1A-2INSTALLATION PRECISION TIG 275A-2ADDITIONAL OUTPUT CAPACITYOutput Current Range2Amps DCto340Amps AC-DC*Type of OutputCC