Page 2 - SAFETY; WARNING; CALIFORNIA PROPOSITION 65 WARNINGS
FOR ENGINEpowered equipment. 1.a. Turn the engine off before troubleshooting and maintenance work unless the maintenance work requires it to be running. ____________________________________________________ 1.b. Operate engines in open, well-ventilated areas or vent the engine exhaust fumes outdoors....
Page 3 - ii; ELECTRIC SHOCK can kill.
ii SAFETY ii ARC RAYS can burn. 4.a. Use a shield with the proper filter and cover plates to protect your eyes from sparks andthe rays of the arc when welding or observingopen arc welding. Headshield and filter lensshould conform to ANSI Z87. I standards. 4.b. Use suitable clothing made from durable...
Page 4 - iii
FOR ELECTRICALLYpowered equipment. 8.a. Turn off input power using the disconnect switch at the fuse box before working onthe equipment. 8.b. Install equipment in accordance with the U.S. National Electrical Code, all local codes and the manufacturer’srecommendations. 8.c. Ground the equipment in ac...
Page 5 - iv; PRÉCAUTIONS DE SÛRETÉ
iv SAFETY iv PRÉCAUTIONS DE SÛRETÉ Pour votre propre protection lire et observer toutes les instructions et les précautions de sûreté specifiques qui parraissent dans ce manuel aussi bien que les précautions de sûreté générales suiv- antes: Sûreté Pour Soudage A L’Arc 1. Protegez-vous contre la seco...
Page 8 - Thank You; Please Examine Carton and Equipment For Damage Immediately
vii vii Thank You for selecting a QUALITY product by Lincoln Electric. We want you to take pride in operating this Lincoln Electric Company product •••as much pride as we have in bringing this product to you! Read this Operators Manual completely before attempting to use this equipment. Save this ma...
Page 9 - TABLE OF CONTENTS; viii
TABLE OF CONTENTS Page . Installation ..........................................................................................................Section A Technical Specifications ........................................................................................A-1,A-2Safety Precautions .. .......
Page 10 - INSTALLATION; Power Factor Capacitor; RATED INPUT - SINGLE PHASE ONLY; Number
A-1 INSTALLATION PRECISION TIG 275 A-1 TECHNICAL SPECIFICATIONS-PRECISION TIG 275 (K1827-2 Export-50/60Hz) Voltage + 10% 220-230/ 380-400/415 Max. Amps With Out Power Factor Capacitor 95/55/50 109/63/58 80/46/4285/49/45 70/41/3765/38/35 10/6/5 400W Max. Amps With Power Factor Capacitor 80/46/4386/50...
Page 11 - ADDITIONAL OUTPUT CAPACITY; Amps DC; PHYSICAL DIMENSIONS; TEMPERATURE RANGES
K1827-2 A-2 INSTALLATION PRECISION TIG 275 A-2 ADDITIONAL OUTPUT CAPACITY Output Current Range 2Amps DC to 340Amps AC-DC * Type of Output CC (Constant Current) AC/DC (GTAW) Stick (SMAW) Maximum Open Circuit Voltage (STICK AND TIG) AC/DC OCV: 75/68 Auxiliary Power 15Amp Circuit Breaker and NEMA 5-15R...
Page 12 - SAFETY PRECAUTIONS; SELECT SUITABLE LOCATION; GRINDING; STACKING
A-3 INSTALLATION PRECISION TIG 275 A-3 SAFETY PRECAUTIONS SELECT SUITABLE LOCATION Place the welder where clean cooling air can freely cir-culate in through the top rear vents and out through thebottom rear vents. Dirt, dust or any foreign materialthat can be drawn into the welder should be kept at ...
Page 13 - INPUT and GROUNDING CONNECTIONS
INPUT and GROUNDING CONNECTIONS Be sure the voltage, phase, and frequency of the inputpower is as specified on the rating plate, located on therear of the machine. Fuse the input circuit with the recommended super lagfuses or delay type1 circuit breakers. Choose an inputand grounding wire size accor...
Page 14 - WORK CABLE CONNECTION; If the Precision TIG is equipped with an Under-; STICK ELECTRODE CABLE CONNECTION; On multiple input voltage welders, be sure the
A-5 INSTALLATION PRECISION TIG 275 A-5 Recommended Cable Sizes for Combined Lengths ofCopper Work and Electrode Cables using 75 o C Wire: Machine Rating 0 to 100 Ft . 101 to 200 Ft 201 to 250 Ft 275A/40% #1 (42.4 mm2) 1/0 (53.5 mm2) 2/0 (67.4 mm2) WORK CABLE CONNECTION A 15 ’ (2/0) weld cable with c...
Page 15 - TIG TORCH CONNECTION; The Precision TIG provides an insulated Torch; chained to a support.; Stud
A-6 INSTALLATION PRECISION TIG 275 A-6 TIG TORCH CONNECTION The Precision TIG torch connection box, located on theright side of the machine, provides all the input andoutput connections for the installation of both air-cooled and water-cooled TIG torches with fittings con-forming to Compressed Gas A...
Page 16 - AUXILIARY POWER CONNECTIONS; Export models
A-7 INSTALLATION PRECISION TIG 275 A-7 AUXILIARY POWER CONNECTIONS The Precision TIG machines provide a standard NEMA5-15R duplex receptacle, located on the upper caseback on the torch side of the machine: • The bottom outlet of this duplex receptacle provides switched 115VAC power for the Under-Coo...
Page 17 - ROBOTIC INTERFACE CONNECTION
A-8 INSTALLATION PRECISION TIG 275 A-8 ROBOTIC INTERFACE CONNECTION Robotic interface can be made at the RemoteReceptacle (See Operation Section B-2). The machineis shipped with the remote receptacle circuit internallyconnected to receptacle J5 of the Control board forstandard Amptrol operation. In ...
Page 18 - OPERATION; PRODUCT DESCRIPTION; PIPE THAWING
B-1 OPERATION B-1 PRODUCT DESCRIPTION The Precision TIG 275 is part of a new family of indus-trial arc welding power sources providing constant cur-rent, single range square wave AC/DC TIG (GTAW)with new patented (pending) Micro-Start TM Technology, Presettable Min. and Max. Output controls, and bui...
Page 19 - RECOMMENDED PROCESSES; User provided
B-2 OPERATION B-2 RECOMMENDED PROCESSES ANDEQUIPMENT RECOMMENDED PROCESSES The Precision TIG 275 is recommended for the TIG(GTAW) and Stick (SMAW) welding processes withinits output capacity range of 2 amps DC, or 5 amps AC,to 340 amps AC/DC. It is compatible with mostMagnum TIG accessories (refer E...
Page 20 - POLARITY SWITCH –; CONTROLS AND SETTINGS
B-3 OPERATION B-3 1. POWER SWITCH - Input line switch turns input power ON or OFF, as indicated by the on or off sta-tus of the front panel displays. 2. POLARITY SWITCH – The 3-position rotary power switch has detente positions for DC-, AC and DC+selections for the Electrode output welding polarity....
Page 21 - AC BALANCE CONTROL; MINIMUM OUTPUT CONTROL AND DISPLAY SWITCH
B-4 OPERATION B-4 • When the Polarity Switch is set to DC (- or +), the TIG mode provides high frequency only for starting. Hi-Freq. turns on after pre-flow time with the arcstart switch closure, and turns off when the arc isestablished* • Also functions for DC+ polarity to permit "balling" ...
Page 22 - DIGITAL METER AND DISPLAY SWITCH; ADVANCED PANEL CONTROLS; • DO NOT USE 4-STEP IF USING AN AMPTROL; CAUTION
B-5 OPERATION B-5 8. DIGITAL METER AND DISPLAY SWITCH – A 3- digit LED meter is used to monitor the preset andactual welding procedure based on the Display(momentary) switch position: • Before welding with Display switch in center (nor- mal) position, the digital meter displays the presetwelding amp...
Page 23 - PULSE MODE SWITCH
B-6 OPERATION B-6 • In 4-Step position allows welding without continu- ously holding the start switch trigger. The arc startswitch functions in the following manner: 1. Closing switch starts preflow, then arc starts at Minimum (Start) setting level (See Item7). If the trigger is maintained closed af...
Page 24 - INTERNAL SET UP CONTROLS; Provides an extra out-; TIG WELDING FEATURES; Doubles the time ranges.
B-7 OPERATION B-7 INTERNAL SET UP CONTROLS Precision TIG 275 models which have an AdvancedPanel (K1829-1) option installed* have the followingadditional control features which are set up using theDIP Switch (S1) provided on the internal panel of thisoption. Access to this internal panel is obtained ...
Page 27 - TIG WELD CYCLE CHART
B-10 OPERATION B-10 SETUP GUIDELINES FOR TIG WELDINGWITH AN AMPTROL Both the Hand and Foot Amptrols work in a similar manner. They are meant to be used for remote currentcontrol for TIG welding using the machine ’ s 2-Step trigger mode (See Item 12). The Amptrol is capable of controlling the output ...
Page 28 - Using this new foot pedal with the Precision TIG
B-11 OPERATION B-11 PRECISION TIG 275 Max. to Min. Amptrol Min. to Max. Amptrol Setup for TIG Amptrol Welding Advanced Panel (If used) Standard Controls Power Switch ON Polarity Switch AC or DC - Mode Switch TIG AC Balance AUTO or Set: More + for alum.oxide " Cleaning " w/o "S pitting ...
Page 29 - RECOMMENDED ELECTRODE AMPERAGE RANGES - PRECISION TIG 275; SMAW Process; MAKING A TIG WELD WITH AN AMPTROL
B-12 OPERATION B-12 PRECISION TIG 275 RECOMMENDED ELECTRODE AMPERAGE RANGES - PRECISION TIG 275 SMAW Process ELECTRODE POLARITY 3/32" 1/8" 5/32" Fleetweld 5P, Fleetweld 5P+ DC+ 40 - 70 75 - 130 90 - 175 Fleetweld 180 DC+ 40 - 80 55 - 110 105 - 135 Fleetweld 37 DC+ 70 - 95 100 - 135 145 -...
Page 30 - ACCESSORIES; OPTIONAL EQUIPMENT; FACTORY INSTALLED OPTIONS
C-1 ACCESSORIES C-1 OPTIONAL EQUIPMENT FACTORY INSTALLED OPTIONS The basic Precision TIG 275 machine is factoryequipped with: • A 3/8" Adapter (S20403-4) for air cooled torch con- nection of a PTA-9 or PTA-17. FIELD INSTALLED OPTIONS The following Options/Accessories are available for thePrecisi...
Page 31 - MAINTENANCE; OVERLOAD PROTECTION; THERMOSTATIC PROTECTION
D-1 MAINTENANCE D-1 PRECISION TIG 275 ELECTRIC SHOCK can kill. • Only qualified personnel shouldperform this maintenance. • Turn the input power OFF at thedisconnect switch or fuse boxbefore working on thisequipment. • Do not touch electrically hot parts. To avoid receiving a high frequency shock, k...
Page 32 - SERVICE PROCEDURES
D-2 MAINTENANCE D-2 SERVICE PROCEDURES Operation of the Precision TIG should be trouble-freefor the life of the machine. Should a malfunction occur,however, the following procedures will be useful totrained service personnel with experience in repairingarc welding equipment: COMPONENT ACCESS The fol...
Page 33 - TROUBLESHOOTING; Look under the column labeled; HOW TO USE TROUBLESHOOTING GUIDE
DO NOT use a volt-ohm meter to measure output voltages in TIG mode. TheHigh Frequency Arc Starter voltage can damage the meter. CAUTION E-1 TROUBLESHOOTING E-1 PRECISION TIG 275 If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact you...
Page 34 - OUTPUT PROBLEMS
E-2 TROUBLESHOOTING E-2 PRECISION TIG 275 Observe all Safety Guidelines detailed throughout this manual If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your LocalLincoln Authorized Field Service Facility for technical troubleshoo...
Page 35 - METER PROBLEMS
E-3 TROUBLESHOOTING E-3 PRECISION TIG 275 Observe all Safety Guidelines detailed throughout this manual If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your LocalLincoln Authorized Field Service Facility for technical troubleshoo...
Page 36 - PROBLEMS
E-4 TROUBLESHOOTING E-4 PRECISION TIG 275 Observe all Safety Guidelines detailed throughout this manual If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your LocalLincoln Authorized Field Service Facility for technical troubleshoo...
Page 37 - PRESET & OUTPUT CONTROL PROBLEMS
E-5 TROUBLESHOOTING E-5 PRECISION TIG 275 Observe all Safety Guidelines detailed throughout this manual If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your LocalLincoln Authorized Field Service Facility for technical troubleshoo...
Page 38 - STICK WELDING PROBLEMS
E-6 TROUBLESHOOTING E-6 PRECISION TIG 275 Observe all Safety Guidelines detailed throughout this manual If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your LocalLincoln Authorized Field Service Facility for technical troubleshoo...
Page 39 - TIG PROBLEMS
E-7 TROUBLESHOOTING E-7 PRECISION TIG 275 Observe all Safety Guidelines detailed throughout this manual If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your LocalLincoln Authorized Field Service Facility for technical troubleshoo...
Page 40 - WIRING DIAGRAM
F-1 WIRING DIAGRAM F-1 PRECISION TIG 275 NOTE: This diagram is for r efer ence only . It may not be accurate for all machines cover ed by this manual. The specific diag ram for a particular code is pasted inside the machine on one of the enclosur e panels. If the diagram is illegible, write to the S...
Page 41 - DIMENSION PRINT
F-2 DIMENSION PRINT F-2 PRECISION TIG 275 L11660 XB-U F ** LO C A T ION OF ( 4) O .2 84 BAS E MOUNT ING HOLES. 12 .7 7 31. 00 26. 00 1. 00 24 .0 0 ** .2 8 3. 47 20. 50 ** 22. 00 .3 0 .7 5 3. 44 TO R CH HOLST ER 2. 11 T O RCH B O X 11 .0 0 2.9 8
Page 42 - NOTES
Page 44 - ÇÃ
WARNING AVISO DE PRECAUCION ATTENTION WARNUNG ATEN ÇÃ O Spanish French German Portuguese Japanese Chinese Korean Arabic READ AND UNDERSTAND THE MANUFACTURER’S INSTRUCTION FOR THIS EQUIPMENT AND THE CONSUMABLES TOBE USED AND FOLLOW YOUR EMPLOYER’S SAFETY PRACTICES. SE RECOMIENDA LEER Y ENTENDER LAS I...