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IM703-A
November, 2004
PRECISION TIG 375
For use with machines having Code Numbers: 10809; 10810; 10894
Safety Depends on You
Lincoln arc welding and cutting
equipment is designed and built
with safety in mind. However, your
overall safety can be increased by
proper installation ... and thoughtful
operation on your part. DO NOT
INSTALL, OPERATE OR REPAIR
THIS EQUIPMENT WITHOUT
READING THIS MANUAL AND
THE SAFETY PRECAUTIONS
CONTAINED THROUGHOUT.
And, most importantly, think before
you act and be
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i i SAFETY WARNING CALIFORNIA PROPOSITION 65 WARNINGS For Diesel Engines: Diesel engine exhaust and For Gasoline Engines: The engine exhaust from some of its constituents are known to the State this product contains chemicals known to the of California to cause cancer, birth defects, and State of California to cause cancer, birth defects, other reproductive harm. or other reproductive harm. ARC WELDING CAN BE HAZARDOUS. PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH. KEEP CHIL
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ii ii SAFETY ELECTRIC SHOCK can kill. ARC RAYS can burn. 3.a. The electrode and work (or ground) circuits 4.a. Use a shield with the proper filter and cover are electrically “hot” when the welder is on. plates to protect your eyes from sparks and Do not touch these “hot” parts with your bare the rays of the arc when welding or observing skin or wet clothing. Wear dry, hole-free open arc welding. Headshield and filter lens gloves to insulate hands. should conform to ANSI Z87. I standards. 3.b. In
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iii iii SAFETY WELDING SPARKS can CYLINDER may explode cause fire or explosion. if damaged. 6.a. Remove fire hazards from the welding area. 7.a.Use only compressed gas cylinders If this is not possible, cover them to prevent containing the correct shielding gas for the the welding sparks from starting a fire. process used and properly operating Remember that welding sparks and hot regulators designed for the gas and materials from welding can easily go through small cracks pressure used. All hos
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iv iv SAFETY PRÉCAUTIONS DE SÛRETÉ 6. Eloigner les matériaux inflammables ou les recouvrir afin de prévenir tout risque d’incendie dû aux étincelles. Pour votre propre protection lire et observer toutes les instructions et les précautions de sûreté specifiques qui parraissent dans ce 7. Quand on ne soude pas, poser la pince à une endroit isolé de manuel aussi bien que les précautions de sûreté générales suiv- la masse. Un court-circuit accidental peut provoquer un antes: échauffement et un risqu
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v v for selecting a QUALITY product by Lincoln Electric. We want you to take pride in operating this Lincoln Electric Company product ��� Thank You as much pride as we have in bringing this product to you! Please Examine Carton and Equipment For Damage Immediately When this equipment is shipped, title passes to the purchaser upon receipt by the carrier. Consequently, Claims for material damaged in shipment must be made by the purchaser against the transportation company at the time the shipment
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vi vi TABLE OF CONTENTS Page. Installation ..........................................................................................................Section A Technical Specifications ........................................................................................A-1,A-2 Safety Precautions.. ............................................................................................................................................... .A-3 Select Suitable Location........................
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A-1 A-1 INSTALLATION TECHNICAL SPECIFICATIONS-PRECISION TIG 375 (K1903-1 Domestic Package*-60Hz) (K1833-1 Domestic,K1833-2 Canadian-60Hz) (K1834-1 Export-50/60Hz) RATED INPUT - SINGLE PHASE ONLY K Duty Cycle-Applications Voltage + 10% Max. Amps With Power Factor Capacitor Number 40% AC/DC Stick / Balance TIG 112/102/51 # K1833-1 Unbalance (70% Penetration ) AC TIG 139/126/63 60% K1903-1 AC/DC Stick / Balance TIG 102/92/46 # Unbalance (70% Penetration ) AC TIG 208/230/460 128/116/58 R 100% AC/
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A-2 A-2 INSTALLATION RATED OUTPUT - IEC 60974-1 (K1834-1) Duty Cycle-Applications Volts at Rated Amperes Amps 40% AC/DC Stick / Balance TIG 35.0 375 # Unbalance (70% Penetration ) AC TIG 24.0 350 60% AC/DC Stick / Balance TIG 34.0 350 # Unbalance (70% Penetration ) AC TIG 23.0 325 100% AC/DC Stick / Balance TIG 32.0 300 # Unbalance (70% Penetration ) AC TIG 21.0 275 ADDITIONAL OUTPUT CAPACITY Output Current Maximum Open Type of Output Auxiliary Power Range K1903-1, K1833-1, K1833-2 Circuit V
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A-3 A-3 INSTALLATION ENVIRONMENTAL RATING SAFETY PRECAUTIONS Read entire installation section before starting Precision TIG 375 power sources carry an IP21S installation. Environmental rating. They are rated for use in damp, dirty rain-sheltered environments. WARNING MACHINE GROUNDING AND HIGH FRE- ELECTRIC SHOCK can kill. � Only qualified personnel should QUENCY INTERFERENCE PROTECTION perform this installation. � Turn the input power OFF at the The frame of the welder must be grounded. A
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A-4 A-4 INSTALLATION 3. Be sure the torch and work cable rubber coverings INPUT and GROUNDING CONNECTIONS are free of cuts and cracks that allow high frequen- cy leakage. Cables with high natural rubber content, WARNING such as Lincoln Stable-Arc® better resist high fre- ELECTRIC SHOCK can kill. quency leakage than neoprene and other synthetic rubber insulated cables. � Turn the input power OFF at the disconnect switch or fuse box before working on this 4. Keep the torch in good repair and al
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A-5 A-5 INSTALLATION Welders are shipped connected for the highest input Recommended Cable Sizes for Combined Lengths of o voltage as listed on the rating plate. To change this Copper Work and Electrode Cables using 75 C Wire: connection, designations on the reconnect panel LOW, MID, and HIGH correspond to the name plated input Machine Rating 0 to 100 Ft. 101 to 200 Ft 201 to 250 Ft voltages of a triple voltage welder. Dual voltage 2 2 2 375A/40% #1 (42.4 mm ) 1/0 (53.5 mm )
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A-6 A-6 INSTALLATION FIGURE A.2 TIG TORCH REMOTE CONNECTION CONTROL PANEL RECEPTACLE ST STI IC CK K WO WOR RK K WORK STICK ELECTRODE STUD STUD (Shown without hinged stud cover) FIGURE A CABLE STRAIN RELIEF HOLES TIG TORCH CONNECTION CYLINDER could explode if damaged. The Precision TIG torch connection box, located on the � Keep cylinder upright and right side of the machine, provides all the input and chained to a support. output connections for the installation of both air- � Keep cylinder
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A-7 A-7 INSTALLATION FIGURE A.3 For Gas Supply hose with 5/8-18RH male (Provided with Weld Package model) 1/2-13 Stud For Coolant Supply Hoses with 5/8-18LH male (Provided with Weld Package model or Under-Cooler Cart) The Precision TIG Export models also provide a AUXILIARY POWER CONNECTIONS grounded 220vac Euro type Schuko receptacle and a 5 amp circuit breaker, located on the upper case back The Precision TIG machines provide a standard NEMA on the reconnect side of the machine, intended fo
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A-8 A-8 INSTALLATION ROBOTIC INTERFACE CONNECTION Robotic interface can be made at the Remote Receptacle (See Operation Section B-2). The machine is shipped with the remote receptacle circuit internally connected to receptacle J5 of the Control board for standard Amptrol operation. In order to enable the remote receptacle for robotic interface its connection plug must be moved from J5 to J5A on the Control board. (Refer to the machine Wiring Diagram.) The robotic interface functions with the
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B-1 B-1 OPERATION SAFETY PRECAUTIONS PRODUCT DESCRIPTION Read and understand this entire section before operat- The Precision TIG 375 is part of a new family of indus- ing the machine. trial arc welding power sources providing constant cur- rent, single range square wave AC/DC TIG (GTAW) TM with new patented (pending) Micro-Start Technology, WARNING Presettable Min. and Max. Output controls, and built-in ELECTRIC SHOCK can kill. high frequency stabilization for continuous AC TIG and � Only quali
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B-2 B-2 OPERATION EQUIPMENT LIMITATIONS RECOMMENDED PROCESSES AND The Precision TIG machines are protected from over- EQUIPMENT loads beyond the electrical ratings and duty cycles, per the Specifications Section A-1, A-2, with Thermostat protection of the primary and secondary transformer coils. RECOMMENDED PROCESSES The Precision TIG 375 is recommended for the TIG The Precision TIG machines do not have Hi-Freq. (GTAW) and Stick (SMAW) welding processes within available at the Stick electrode st
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B-3 B-3 OPERATION CONTROLS AND SETTINGS The Front Control Panel contains the knobs and switches necessary for adjusting the operation of the Precision TIG 375, with function indicator lights and an electronic display for volts and amps. The components are described below: FIGURE B.1 - CONTROL PANEL 1. POWER SWITCH 2. POLARITY SWITCH 3. MODE SWITCH 4. AC BALANCE CONTROL 5. LOCAL/REMOTE CURRENT CONTROL SWITCH 6. MAXIMUM OUTPUT CONTROL 7. MINIMUM OUTPUT CONTROL AND DISPLAY SWITCH 8.DIGITAL METER A
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B-4 B-4 OPERATION � When the Polarity Switch is set to DC (- or +), the � With the Current Control switch to REMOTE posi- TIG mode provides high frequency only for starting. tion, this knob sets the maximum welding level that the Peak output can be set with the remote Amptrol. Hi-Freq. turns on after pre-flow time with the arc TM start switch closure, and turns off when the arc is � The new MicroStart Technology minimum current established* circuit provides for low end welding (down to 2 amps)
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B-5 B-5 OPERATION 8. DIGITAL METER AND DISPLAY SWITCH– A3- � When the Current Control Switch is in either LOCAL digit LED meter is used to monitor the preset and or REMOTE positions the arc start switch functions actual welding procedure based on the Display when connected to the Remote receptacle. (momentary) switch position: FIGURE B.2 � Before welding with Display switch in center (nor- REMOTE RECEPTACLE* (Front View) mal) position, the digital meter displays the preset ARC START REMOTE OUT
