Miami, Florida 33135 or CSA Standard W117.2-1974. A Free copy of “Arc Welding Safety” booklet E205 is available from the Lincoln Electric Company, 22801 St. Clair Avenue, Cleveland, Ohio 44117-1199. BE SURE THAT ALL INSTALLATION, OPERATION, MAINTENANCE AND REPAIR PROCEDURES ARE PERFORMED ONLY BY QUALIFIED INDIVIDUALS.
ELECTRIC SHOCK can kill. 3.a. The electrode and work (or ground) circuits are electrically “hot” when the welder is on. Do not touch these “hot” parts with your bare skin or wet clothing. Wear dry, hole-free gloves to insulate hands. 3.b.
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WELDING SPARKS can cause fire or explosion. 6.a. Remove fire hazards from the welding area. If this is not possible, cover them to prevent the welding sparks from starting a fire. Remember that welding sparks and hot materials from welding can easily go through small cracks and openings to adjacent areas.
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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 LʼArc 1. Protegez-vous contre la secousse électrique: a.
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We respond to our customers based on the best information in our possession at that time. Lincoln Electric is not in a position to warrant or guarantee such advice, and assumes no liability, with respect to such information or advice.
28.0 in. 41.0 in. 711 mm 1041 mm TEMPERATURE RANGES STORAGE TEMPERATURE RANGE -40°C to +85°C (-40° to +185°F) 180°C (H) PRECISION TIG 275 Auxiliary Power Receptacle for up to: Type 75°C Type 75°C Copper Wire in Input Copper Conduit AWG...
CONNECT INPUT POWER LEADS CONNECT INPUT GROUND LEAD All connections should be made in accordance with all local codes and national electrical codes. Installation by a qualified electrician is recom- mended. PRECISION TIG 275 WARNING FIGURE A.1 CONNECT INPUT VOLTAGE LEVEL...
EVEN THOUGH HI-FREQ IS NOT APPLIED TO THE PRECISION TIG STICK TERMINAL, IT ELECTRICALLY "HOT" TO WORK WHEN TIG WELDING. ------------------------------------------------------------------------ PRECISION TIG 275 C Wire: 0 to 100 Ft. 101 to 200 Ft 201 to 250 Ft #1 (42.4 mm 2 ) 1/0 (53.5 mm 2 ) 2/0 (67.4 mm 2 )
1/2” Stud Connector (S20403-3) with with a 7/8-14 LH male fitting. Magnum PTW-18/-20 (or LW-) water-cooled Torches require no adapter for Precision TIG connection. PRECISION TIG 275 TIG TO RCH CONNECTIO N PAN EL...
Cooler or Under-Storage unit, the Foot Pedal (or other remote control accessory) and coiled control cable, or excess cable length, may be conveniently stored in the drawer while remaining connected. PRECISION TIG 275 For Gas Supply hose with 5/8-18RH male (Provided with Weld...
0.2A rated switch circuit between pin 1 (+) and pin 2 (com) for an external 40VDC supplied relay (with coil diode). This switch closes when the Peak Pulse is on, and opens when off. PRECISION TIG 275...
Observe additional Safety Guidelines detailed in the beginning of this manual. OPERATION 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 patented Micro-Start Min.
RECOMMENDED PROCESSES AND EQUIPMENT RECOMMENDED PROCESSES The Precision TIG 275 is recommended for the TIG (GTAW) and Stick (SMAW) welding processes within its output capacity range of 2 amps DC, or 5 amps AC, to 340 amps AC/DC. It is compatible with most...
* Arc voltage and current are sensed to determine if the arc is established or out. PRECISION TIG 275 1. POWER SWITCH 2. POLARITY SWITCH 3. MODE SWITCH 4.
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• In STICK mode the Start control is not functional since Hot Start level is fixed, or internal Advanced Panel adjustable (see Section B-7). Pressing the Display (momentary) switch toggle left to Minimum Output position displays minimum amps rating of the machine. PRECISION TIG 275 Technology minimum current...
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* Default Factory Setting. (Indicated by "blinking" decimal point.) ◊ If no Advanced Control Panel the Stick menu displays “- - -“. PRECISION TIG 275 (Only setting for SS0, above.) (Only setting for SS1 & SS2, above.) ◊ ("Softer" arc)
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Postflow time (See Item 9). Note: See Section B-7 for 2-Step operation during Downslope with Restart feature selected to be dis- abled, instead of enabled (as shipped). PRECISION TIG 275 REMOTE OUTPUT CONTROL 10K ohm...
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• When using an Amptrol remote control, where the downs- lope is controlled by the operator down to the crater-fill level, the Downslope time should be set to zero so as not to have the Downslope time delay when the arc start switch is opened. PRECISION TIG 275...
(same as Start level). (DOES NOT FUNCTION) The Postflow Time doubling feature can also be selected on Precision TIG 275 models without the Advanced Panel by access- HOT START ing the Control board in the control box per above instructions,...
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OPERATION FIGURE B.3 (With DIP Switch #2 OFF) (With DIP Switch #2 ON, As Shipped) PRECISION TIG 275...
SEE ITEM 15 SEE ITEM 14 SEE ITEM 15 SEE ITEM 16 SEE ITEM 17 Technology, some tungstens may be PRECISION TIG 275 B-11 SEE ITEM 12 SEE ITEM 7 SEE ITEM 9 SEE ITEM 12 & TIG Welding Features...
Blue Max Stainless Red Baron Stainless Mild steel procedures are based on recommended procedures listed in C2.10 8/94 and the maximum rating of the PRECISION TIG 275 Excaliber 7018 procedures are based on Jet-LH 78 MR Blue Max procedures are based on C6.1 6/95...
See below for more detailed descriptions. FIELD INSTALLED OPTIONS The following Options/Accessories are available for the Precision TIG 275 and are installed per instructions in this manual and / or provided in the package: • K2621-1 Precision TIG Advanced Control Panel...
ROUTINE AND PERIODIC MAINTENANCE Very little routine maintenance is necessary to keep your Precision TIG 275 running in top condition. No specific schedule can be set for performing the follow- ing items; factors such as hours of usage and machine environment should be considered when establishing a maintenance schedule.
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1. Adjust the gap by loosening the Allen head screw on one of the aluminum blocks, reset the gap and tighten the screw in the new position. If spark gap is correct: 1. Reinstall the access panel on the right case side. PRECISION TIG 275 .015 Spark Gap...
Precision TIG will shut down to protect internal holding resistor from overheating. UNDER-COOLER SERVICE The required maintenance and service instructions for the Under-Cooler are provided in the operatorʼs manu- al (IM723) provided with the Under-Cooler Cart. PRECISION TIG 275 to compare the panel Meter...
HOW TO USE TROUBLESHOOTING GUIDE Service and Repair should only be performed by Lincoln Electric Factory Trained Personnel. Unauthorized repairs performed on this equipment may result in danger to the technician and machine operator and will invalidate your factory warranty. For your safety and to avoid Electrical Shock, please observe all safety notes and precautions detailed throughout this manual.
3. Losing trigger supply to Control PC board 1. Faulty Control PC board 1. Bad connection at P4 of Control PC board 2. Faulty Control PC board CAUTION PRECISION TIG 275 RECOMMENDED COURSE OF ACTION If all recommended possible areas misadjustment have been...
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2. For Preflow; Menu setting too long. Check Menu setting. 3. Missing plug P3 on Control board or bad connection of P3 to Advanced Control PCB. CAUTION PRECISION TIG 275 RECOMMENDED COURSE OF ACTION If all recommended possible areas misadjustment have...
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3. Faulty Control PC board 1. Micro-switch S2A is not engaged & disengaged properly when switch- ing between DC & AC polarity. (S2A locates on the Polarity switch) CAUTION PRECISION TIG 275 RECOMMENDED COURSE OF ACTION If all recommended possible areas misadjustment have been...
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2. Bad connection at P1 of Advanced Control PC board 1. Downslope is not set at min. 2. Bad Downslope potentiometer R12 or its connection CAUTION PRECISION TIG 275 RECOMMENDED COURSE OF ACTION If all recommended possible areas misadjustment have...
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2. Gas shielding may be insufficient. 3. Contaminated gas or leaks in the gas line, torch, or connections 4. Helium blend is used as a shield- ing gas CAUTION PRECISION TIG 275 RECOMMENDED COURSE OF ACTION If all recommended possible areas misadjustment have...
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2. Ground connection of Protection PC board may has become loose 3. Ground connection Bypass/Stabilizer PC board may has become loose. CAUTION PRECISION TIG 275 RECOMMENDED COURSE OF ACTION If all recommended possible areas misadjustment have been checked and the problem persists,...
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