Instruction/ maintenance manual of the product IM936 Lincoln Electric
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PRECISION TIG 375 OPERA T OR’S MANUAL IM936 April, 2007 Safety Depends on Y ou 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.
FOR ENGINE powered equipment. 1.a. T urn 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.
ii SAFETY ii ARC RA YS can burn. 4.a. Use a shield with the proper filter and cover plates to protect your eyes from sparks and the rays of the arc when welding or observing open arc welding. Headshield and filter lens should conform to ANSI Z87. I standards.
FOR ELECTRICALL Y powered equipment. 8.a. T urn off input power using the disconnect switch at the fuse box before working on the equipment. 8.b. Install equipment in accordance with the U.S. National Electrical Code, all local codes and the manufacturer ’s recommendations.
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.
v v T T h h a a n n k k Y Y o o u u 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.
T ABLE OF CONTENTS Page . Installation ..........................................................................................................Section A T echnical Specifications ......................................................................
A-1 INST ALLA TION PRECISION TIG 375 A-1 TECHNICAL SPECIFICA TIONS- PRECISION TIG 375 (K2623-1 Export-50/60Hz) V oltage + 10% 220-230/ 380-400/415 Max. Amps With Power Factor Capacitor 1 19/69/63 1 18/68/62 1 10/64/59 97/56/52 88/51/47 73/42/39 48/28/25 .
A-2 INST ALLA TION PRECISION TIG 375 A-2 Height Width Depth Weight 31.0 in. 22.0 in. 26.0 in. 507 lbs. 787 mm 559 mm 660 mm 230 kgs. PHYSICAL DIMENSIONS 1 ALSO CALLED ‘INVERSE TIME" OR "TH.
A-3 INST ALLA TION PRECISION TIG 375 A-3 SAFETY PRECAUTIONS SELECT SUIT ABLE LOCA TION Place the welder where clean cooling air can freely cir- culate in through the top rear vents and out through the bottom rear vents. Dirt, dust or any foreign material that can be drawn into the welder should be kept at a minimum.
INPUT and GROUNDING CONNECTIONS Be sure the voltage, phase, and frequency of the input power is as specified on the rating plate, located on the rear of the machine. Remove the reconnect panel cover located near the back of the left case side to reveal the reconnect panel.
A-5 INST ALLA TION PRECISION TIG 375 A-5 Recommended Cable Sizes for Combined Lengths of Copper Work and Electrode Cables using 75 o C Wire: Machine Rating 0 to 100 Ft . 101 to 200 Ft 201 to 250 Ft 375A/40% #1 (42.4 mm 2 ) 1/0 (53.5 mm 2 ) 2/0 (67.4 mm 2 ) WORK CABLE CONNECTION A 15’ (2/0) weld cable with clamp is available (K2150-1).
A-6 INST ALLA TION PRECISION TIG 375 A-6 TIG TORCH CONNECTION The Precision TIG torch connection box, located on the right side of the machine, provides all the input and output connections for the in.
T orch Adapter Air Cooled T orch O UTPUT (front) Panel E LECTODE AND/OR GAS OUTPUT 5/8-18 RH ELECTODE AND COOLANT IN 7/8-14 LH C OOLANT OUT 5/8-18 LH ELECTODE AND/OR GAS OUTPUT 5/8-18 RH INPUT (back) Panel T wo - Cable (PT A-9,-7,-26) One - Cable (PT A-26) One - Cable (PT A-9,-17) K2166-2 (Opt.
A-8 INST ALLA TION PRECISION TIG 375 A-8 ROBOTIC INTERF ACE 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.
B-1 OPERA TION B-1 PRODUCT DESCRIPTION The Precision TIG 375 is part of a family of industrial arc welding power sources providing constant current, single range square wave AC/DC TIG (GT AW) with patented MicroStart™ II T echnology , Presettable Min.
B-2 OPERA TION B-2 RECOMMENDED PROCESSES AND EQUIPMENT RECOMMENDED PROCESSES The Precision TIG 375 is recommended for the TIG (GT AW) and Stick (SMAW) welding processes within its output capacity range of 2 amps DC, or 5 amps AC, to 420 amps AC/DC.
B-3 OPERA TION 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 .
B-4 OPERA TION 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 arc start switch closure, and turns off when the arc is established. * • Also functions for DC+ polarity to permit "balling" of tungsten for AC TIG welding.
B-5 OPERA TION B-5 PRECISION TIG 375 DIGIT AL DISPLA Y DIGIT A L DISPLA Y SELECT SELECT DISPLA Y DISPLA Y SET SET DISPLA Y DISPLA Y 7a MENU BUTTON AND DISPLA Y SWITCH – Pressing and holding the (Men.
B-6 OPERA TION B-6 PRECISION TIG 375 8. DIGIT AL METER AND DISPLA Y SWITCH – A (3- digit) LED meter is used to monitor the preset and actual welding procedure based on the Display (momentary) switch.
B-7 OPERA TION B-7 • In 4-Step position allows welding without continu- ously holding the start switch trigger . The arc start switch functions in the following manner: 1. Closing switch starts preflow , then arc starts at Minimum (Start) setting level (See Item 7).
B-8 OPERA TION B-8 INTERNAL SET UP CONTROLS Precision TIG 375 Advanced Panel has the following additional control features which are set up using the DIP Switch (S1) provided on the internal panel of this option.
B-9 OPERA TION B-9 PRECISION TIG 375 ( With DIP Switch #2 ON , As Shi pp ed ) ( With DIP Switch #2 OFF ) FIG. 1 FIGURE B.3.
B-10 OPERA TION B-10 PRECISION TIG 375 FIGURE B.4 ( With DIP Switch #3 OFF , As Shi pp ed ) ( With DIP Switch #3 ON ) FIG. 2.
B-11 OPERA TION B-11 SETUP GUIDELINES FOR TIG WELDING WITH AN AMPTROL Both the Hand and Foot Amptrols work in a similar manner . They are meant to be used for remote current control for TIG welding using the machine’ s 2-Step trigger mode (See Item 12).
B-12 OPERA TION B-12 PRECISION TIG 375 Max. to Min. Amptrol Min. to Max. Amptrol Setup for TIG Amp trol Weld ing Advanced P anel (If used) Standard C ontrols P ower Switch ON Polarity Switch A C or DC - Mode Switch TIG AC Balance AUTO or Set: More + fo r alum.
B-13 OPERA TION B-13 PRECISION TIG 375 RECOMMENDED ELECTRODE AMPERAGE RANGES - Precision TIG 375 SMA W Process ELECTRODE POLARITY 3/32" 1/8" 5/32" Fleetweld 5P , Fleetweld 5P+ DC+ 40 - .
C-1 ACCESSORIES C-1 OPTIONAL EQUIPMENT F ACTOR Y INST ALLED OPTIONS The basic Precision TIG 375 machine is factory equipped with: • K2621-1 Precision TIG Advanced Control Panel. Provides 2/4-step trigger with adjustable Pulser con- trols and Down slope timer for TIG welding.
D-1 MAINTENANCE D-1 PRECISION TIG 375 ELECTRIC SHOCK can kill. • Only qualified personnel should perform this maintenance. • T urn the input power OFF at the disconnect switch or fuse box before working on this equipment. • Do not touch electrically hot parts.
D-2 MAINTENANCE D-2 SERVICE PROCEDURES Operation of the Precision TIG should be trouble-free for t he life of the machine. Should a malfunction occur , however , the following procedures will be usefu.
DO NOT use a volt-ohm meter to measure output voltages in TIG mode. The High Frequency Arc Starter voltage can damage the meter . CAUTION E-1 TROUBLESHOOTING E-1 PRECISION TIG 375 If for any reason yo.
E-2 TROUBLESHOOTING E-2 PRECISION TIG 375 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 Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
E-3 TROUBLESHOOTING E-3 PRECISION TIG 375 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 Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
E-4 TROUBLESHOOTING E-4 PRECISION TIG 375 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 Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
E-5 TROUBLESHOOTING E-5 PRECISION TIG 375 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 Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
E-6 TROUBLESHOOTING E-6 PRECISION TIG 375 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 Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
E-7 TROUBLESHOOTING E-7 PRECISION TIG 375 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 Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
F-1 WIRING DIAGRAM F-1 PRECISION TIG 375 C A B B 10K A-B F E D C MINIMUM D F A E A B C D E F 319 322 316C 313C 316B 315 316 317 311 312 313 318 313A 313B 8 4 1 2 3 6 5 6 321 12 11 10 9 8 6 5 4 3 1 2 6.
F-2 DIMENSION PRINT F-2 PRECISION TIG 375 L11660 XB- U F ** L O C A TI O N O F (4) O .2 8 4 B AS E M O U N TI N G H O L ES . 1 2. 77 3 1. 0 0 2 6. 0 0 1. 00 2 4. 00 ** .2 8 3. 47 2 0. 5 0 ** 2 2. 0 0 .3 0 .7 5 3. 44 T O RC H H O L S T E R 2. 1 1 T O R CH B O X 1 1.
NOTES PRECISION TIG 375.
W ARNING A VISO DE PRECAUCION A TTENTION W ARNUNG A TENÇÃO Spanish French German Portuguese Japanese Chinese Korean Arabic READ AND UNDERST AND THE MANUF ACTURER’S INSTRUCTION FOR THIS EQUIPMENT AND THE CONSUMABLES TO BE USED AND FOLLOW YOUR EMPLOYER’S SAFETY PRACTICES.
W ARNING A VISO DE PRECAUCION A TTENTION W ARNUNG A TENÇÃO Spanish French German Portuguese Japanese Chinese Korean Arabic LEIA E COMPREENDA AS INSTRUÇÕES DO FABRICANTE P ARA ESTE EQUIPAMENTO E AS P ARTES DE USO, E SIGA AS PRÁTICAS DE SEGURANÇA DO EMPREGADOR.
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An important point after buying a device Lincoln Electric IM936 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Lincoln Electric IM936 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Lincoln Electric IM936 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Lincoln Electric IM936 you will learn all the available features of the product, as well as information on its operation. The information that you get Lincoln Electric IM936 will certainly help you make a decision on the purchase.
If you already are a holder of Lincoln Electric IM936, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Lincoln Electric IM936.
However, one of the most important roles played by the user manual is to help in solving problems with Lincoln Electric IM936. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Lincoln Electric IM936 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
