ew 4 2009 watermarked
TRANSCRIPT
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NEMA Standards Pub lic ation EW 4-2009
Graphic Symbols for Arc Welding and Cutting Apparatus
Published by
National Electrical Manufacturers Ass ociation 1300 North 17th Street, Suite 1752Rosslyn, VA 22209
©2009 by National Electrical Manufacturers Association. All rights, including translation intoother languages, reserved under the Universal Copyright Convention, the Berne Convention for the Protection of Literary and Artistic Works, and the International and Pan American CopyrightConventions.
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EW 4-2009 – 2 – © 2009, NEMA
CONTENTS
1 Scope............................................................................................................................ 6 2 References.................................................................................................................... 6
2.1
Normative references............................................................................................ 6
2.2 Informative references .......................................................................................... 6 3 Terms and definitions .................................................................................................... 9 4 Identification of parts and application ............................................................................10
4.1 General ...............................................................................................................10 4.2 Procedure for parts ..............................................................................................11 4.3 Selection of symbols............................................................................................11 4.4 Size of symbols ...................................................................................................12 4.5 Use of color .........................................................................................................12
5 Graphic symbols ...........................................................................................................12 6 How to combine graphic symbols ..................................................................................52
6.1 General ...............................................................................................................52 6.2 Procedure to combine symbols ............................................................................53 6.3 Summary.............................................................................................................55
Annex A (informat ive) Examples of Grouping of Symbols ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ..57 A.1 Input voltage/power switch...................................................................................57 A.2 Use of remote receptacles and selector switches..................................................57 A.3 Weld start and stop push buttons .........................................................................58 A.4 Panel indicator lights ...........................................................................................58 A.5 Output (contactor) switch .....................................................................................59 A.6 Arc force control potentiometer . ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...59 A.7 Terminals and selector switch on AC/DC welder ...................................................60 A.8 Process switch (SMAW-GTAW-GMAW)................................................................60 A.9 Ignition switch on engine driven welder ................................................................61 A.10 Idle switch ...........................................................................................................61 A.11 Start/run switch ...................................................................................................62 A.12 Process selection for GMAW................................................................................62 A.13 Control potentiometers for GMAW........................................................................63 A.14 Switched settings for GMAW................................................................................63 A.15 Setting pulsing parameters using digital display....................................................64 A.16 Setting pulsed GMAW parameters with digital display ...........................................64 A.17
AC balance control with balanced position used for the SMAW process .. ... ... ... ... ..65
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FOREWORD
This publication provides manufacturers and users of arc welding and cutting equipment with asystem of graphic symbols that can be used and recognized throughout the arc welding andcutting industry. These graphic symbols communicate the required message independent of any
language, thus minimizing difficulties that could arise when equipment is used by operatorsspeaking different languages.
There are three major factors contributing to the need for graphic symbols: 1) large numbers of functionally illiterate people in the labor force; 2) large numbers of non-English speaking U.S.residents; and 3) the diversity of the global marketplace. In an effort to communicate with asmany people as possible, graphic symbols have been developed. This publication standardizesthose graphic symbols used on arc welding and cutting equipment, explains their direct meaning,and shows their proper use.
The work to develop graphic symbols that provide a clear and practical means of communicatingto operators of arc welding and cutting equipment the function and use of equipment controlsunique to the arc welding and cutting industry has been in progress for a number of decades.
In 1957, the International Organization for Standardization Technical Committee 44 (Welding)(ISO/TC 44) began work on the rating of manual arc welding equipment. This led to thepublication of ISO Recommendation R700.
In 1976, Subcommittee SC 4 (Arc Welding Equipment) of ISO/TC 44 proposed a revision of ISOR700 that incorporated graphic symbols for the identification of equipment control functions anddescription of welding processes.
In 1977, the NEMA Arc Welding Apparatus Graphic Symbols Committee, consisting of representatives of arc welding equ ipment manufacturers, was formed to review the ISO symbols.
In 1982, the first edition of NEMA Standards Publication EW 4 was published. In its preparation,the Committee also gave consideration to the work of other organizations such as theInternational Organization for Standardization (ISO), the American Welding Society (AWS), theSociety of Automotive Engineers (SAE), the American Society of Mechanical Engineers (ASME),as well as the symbols being used by U.S. and European welding and cutting equipmentmanufacturers. Many of the symbols were adopted directly from the work of these organizations,and credit was given to them in EW 4. As a result, the Committee proposed additional symbols for the identification and use of equipment controls that were captured in the first edition of NEMAEW 4. The first edition contained 92 of the most commonly used symbols for welding and cuttingproducts.
In 1984, Technical Committee ISO/TC 145 published ISO 7000 incorporating the graphic symbolsfrom R700 and a 1979 amendment that provided symbols for all kinds of equipment. In 1989, ISO7000 was revised and published.
In 1988, NEMA EW 4 was rescinded.
In 1994, a new version of EW 4 was published. As in the past, this edition gave a great deal of consideration to the work of other organizations, both national and international. Where symbolswere used directly from another source, credit was given to that document. This edition addedinformation on how to combine graphic symbols as well as additional and more current examples
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of their use. This edition contained 185 symbols to accommodate more complex products andprocesses.
Noting advancements in technology and equipment, changes in the global marketplace, andgreater need for harmonization with internationally used graphic symbols, a revision to EW 4
began in 2004 leading to the publication of this document.
This 2009 edition of EW 4 has three main enhancements. First, it adds symbols from Annex L of IEC 60974-1. Secondly, this revision uses an international style acceptable to NEMA draftingprinciples that harmonize with ISO/IEC documentation methods. Thirdly, where multiple symbolsfor the same control, function, or item exist, they are added and shown together to aid ease of use and clarity. As a result, this edition contains 217 symbols to address the expanded needs of users.
This publication will be reviewed periodically by the NEMA Arc Welding Section for the purpose of updating graphic symbols to reflect advancing technology or the latest graphic symbolapplications. Please address any comments or questions regarding this publication to:
Vice President, Technical ServicesNational Electrical Manufacturers Association1300 North 17th Street, Suite 1752Rosslyn, VA 22209
Comments from parties that have an interest in, or responsibility for, the purchase, application,use, and inspection of arc welding and cutting equipment were considered throughout the revisionof this publication, and led to a number of changes from the previous edition. When major changes to this publication are proposed, these parties will again have the opportunity toparticipate in NEMA committee proceedings in order to review and comment on the revision.
The artwork for the graphic symbols shown in this publication is stored in NEMA’s electronic files.
More information on downloading these files free of charge can be found on the EW 4 webpage athttp://www.nema.org/stds/ew4.cfm.
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EW 4-2009 – 5 – © 2009, NEMA
NOTICE AND DISCLAIMER
The information in this publication was considered technically sound by the consensus of personsengaged in the development and approval of the document at the time it was developed.Consensus does not necessarily mean that there is unanimous agreement among every person
participating in the development of this document.
NEMA standards and guideline publications, of which the document contained herein is one, aredeveloped through a voluntary consensus standards development process. This process bringstogether volunteers and/or seeks out the views of persons who have an interest in the topiccovered by this publication. While NEMA administers the process and establishes rules topromote fairness in the development of consensus, it does not write the document and it does notindependently test, evaluate or verify the accuracy or completeness of any information or thesoundness of any judgments contained in its standards and guideline publications.
NEMA disclaims liability for any personal injury, property or other damages of any naturewhatsoever, whether special, indirect, consequential or compensatory, directly or indirectlyresulting from the publication, use of, application, or reliance on this document. NEMA disclaimsand makes no guaranty or warranty, express or implied, as to the accuracy or completeness of any information published herein, and disclaims and makes no warranty that the information inthis document will fulfill any of your particular purposes or needs. NEMA does not undertake toguarantee the performance of any individual manufacturer’s or seller’s products or services byvirtue of this standard or guide.
In publishing and making this document available, NEMA is not undertaking to render professional or other services for or on behalf of any person or entity. Nor is NEMA undertakingto perform any duty owed by any person or entity to someone else. Anyone using this documentshould rely on his or her own independent judgment or, as appropriate, seek the advice of acompetent professional in determining the exercise of reasonable care in any givencircumstances. Information and other standards on the topic covered by this publication may beavailable from other sources, which the user may wish to consult for additional views or information not covered by this publication.
NEMA has no power, nor does it undertake to police or enforce compliance with the contents of this document. NEMA does not certify, test or inspect products, designs or installations for safetyor health purposes. Any certification or other statement of compliance with any health or safety– related information in this document shall not be attributable to NEMA and is solely theresponsibility of the certifier or maker of the statement.
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EW 4-2009 – 6 – © 2009, NEMA
1 Scope
This publication provides graphic symbols for arc welding and cutting equipment, including thosesymbols used to identify controls, indicators, connection points, operations, functions, commands,
and processes. This publication does not cover graphic symbols used to alert personnel of immediate or potential personal hazards in the use o f the equipment.
2 References
2.1 Normative references
Each publication listed below is directly referenced in subsequent clauses of this publication, andhas a corresponding footnote identifying the publisher and, where available, information on howto order the publication. It is recommended that the latest edition be requested when ordering astandard.
IEC 60027-1, Letter symbols to be used in electrical technology — Part 1: General1
IEC 60417-1, Graphical Symbols for use on equipment — Part 1: Overview and application2
IEC 60974-1, Arc welding equipment — Part 1: Welding power sources1
ISO 3767-1, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment —Symbols for operator controls and other displays — Part 1: Common symbols3
ISO 7000, Graphical symbols for use on equipment — Index and synopsis2
ISO 17846, Welding and allied processes — Health and safety — Wordless precautionary labelsfor equipment and consumables used in arc welding and cutting
3
SAE International, Handbook4
2.2 Informative references
Each publication listed below has a corresponding footnote identifying the publisher and, whereavailable, information on how to order the publication. It is recommended that the latest edition berequested when ordering a standard.
ANSI/IEC 60974-1, Arc welding equipment — Part 1: Welding power sources5
——————— 1
Published by, and available from, the International Electrotechnical Commission, 3 rue de Varembé, Geneva 1120,Switzerland; website: www.iec.ch
2 IEC 60417 and ISO 7000 are published in a single volume, available from the International ElectrotechnicalCommission, 3 rue de Varembé, Geneva 1120, Switzerland; website: www.iec.ch
3 Published by, and available from, International Organization for Standardization (ISO), 1 rue de Varembé, Geneva1120, Switzerland; website: www.iso.org
4 Published by, and available from, SAE International, 400 Commonwealth Drive, Warrendale, PA 15906; website:www.sae.org; phone: 1-877-606-7323
5 Published by National Electrical Manufacturers Association and available from Global Engineering Documents;website: global.ihs.com; phone: 1-877-413-5184
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ANSI Z49.1, Safety in Welding and Cutting6
ANSI Z129.1, American Nat ional Standard for Hazardous Industria l Chemicals — PrecautionaryLabeling7
ANSI Z535.1, Safety Color Code8
ANSI Z535.2, Environmental and Facility Safety Signs8
ANSI Z535.3, Criteria for Safety Symbols8
ANSI Z535.4, Product Safety Signs and Labels8
ANSI Z535.5, Safety Tags and Barricade Tapes (for Temporary Hazards)8
ANSI Z535.6, Product Safety Information in Product Manuals, Instructions, and Other CollateralMaterials
8
ASME Y14.5M, Dimensioning and Tolerancing9
AWS A3.0, Standard Welding Terms and Definitions6
CAN/CSA E60974-1-00 (R2005), Arc welding equipment — Part 1: Welding power sources10
CAN/CSA E60974-5-03, Arc welding equipment — Part 5: Wire Feeders10
CAN/CSA E60974-7-02 (R2007), Arc welding equipment — Part 7: Torches10
CSA C22.2 No. 60, Arc Welding Equipment10
DIN 30 600, Graphic Symbols (Bildzeichen Übersicht)11
FMC, Product Safety Sign and Label System12
——————— 6 Published by, and available from, American Welding Society, 550 N.W. LeJeune Road, Miami, FL 33126; website:
www.aws.org; phone: 1-800-443-9353
7 Available from American National Standards Institute, 11 West 42nd Street, New York, NY 10036; website:www.ansi.org; phone: 1-212-642-4980
8 Published by National Electrical Manufacturers Association and available through Global Engineering Documents;website: global.ihs.com; phone: 1-877-413-5184
9 Published, and available from, ASME International, Three Park Avenue, New York, NY 10016-5990; website:www.asme.org; phone: 1-800-843-2763
10 Published by, and available from, Canadian Standards Association, 5060 Spectrum Way, Mississauga, Ontario L4W5N6, Canada; website: www.csa.ca; phone: 1-800-463-6727
11 Published by Deutsche Institut für Normung and available from Beuth Verlag GmbH, Burggrafenstraße 6, 10787Berlin, Germany; website: www.beuth.de
12 Published by FMC Corporation, Corporate Technology Center, P.O. Box 580, Santa Clara, CA 95052
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Henry Dreyfuss, Symbol Sourcebook: An Authoritative Guide to International Graphic Symbols13
William K. Horton, The Icon Book: Visual Symbols for Computer Documentation14
IEC 80416-1, Basic principles for graphical symbols for use on equipment — Part 1: Creation of
symbol originals15
IEEE 315, Graphic Symbols for Electrical and Electronics Diagrams (Including ReferenceDesignation Class Designation Letters)16
ISO 3461-1, General principles for the creation of graphical symbols — Part 1: Graphical symbolsfor use on equipment17
ISO 3864-2, Graphical symbols — Safety colours and safety signs — Part 2: Design principles for product safety labels
17
ISO 3864-3, Graphical symbols — Safety colours and safety signs — Part 3: Design principles for graphical symbols for use in safety signs
17
NEMA EW 1, Electric Arc Welding Power Sources18
NEMA EW 6, Guidelines for Precautionary Labeling of Arc Welding and Cutting Products18
NFPA 70, National Electrical Code19
OSHA 29 CFR 1910, Occupational Safety and Health Standards20
UL 551, Transformer-type Arc Welding Machines21
UL 2201, Standard for Portable Engine-Generator Assemblies22
Westinghouse MB 3662, Product Safety Label Handbook23
——————— 13 Published by John Wiley and Sons Inc. (last publication date: May 1984)
14 Published by John Wiley and Sons Inc. (last publication date: 1994)
15 Published by, and available from, International Electrotechnical Commission, 3 rue de Varembé, Geneva 1120,Switzerland; website: www.iec.ch
16 Published by, and available from, IEEE, 445 Hoes Lane, Piscataway, NJ 08854; website: www.ieee.org; phone: 1-800-701-4333
17 Published by, and available from, International Organization for Standardization (ISO), 1 rue de Varembé, Geneva1120, Switzerland; website: www.iso.org
18 Published by National Electrical Manufacturers Association and available through Global Engineering Documents;
website: global.ihs.com; phone: 1-877-413-5184
19 Published by, and available from, National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169;website: www.nfpa.org; phone: 1-800-344-3555
20 Published by, and available from, Occupational Health & Safety Administration, U.S. Department of Labor; website:www.osha.gov; phone 1-800-321-6742
21 Published by Underwriters Laboratories and available from Comm 2000; website: www.comm-2000.com; phone: 1-800-853-3503
22 Draft developed by Underwriters Laboratories based on an Outline for Investigation, Subject 2201
23 Published by Westinghouse Electric Corporation, Gateway Center, Pittsburgh, PA 15222
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3 Terms and definitions
NOTE The following terms have definitions unique to this publication. Other terms found in this publication, such asfor welding processes, are used as defined in AWS A3.0.
3.1connection pointplace such as output terminal or receptacle where electrical connections are made (can bemechanical, water, or gas connections)
3.2controldevice whose movement causes changes in equipment operation or status such as rheostats,potentiometers, or switches
3.3downslopetime during which process parameters change from one welding or cutting value to a second
lower value
3.4functionaction that a control causes to happen or not to happen by adjusting the control
3.5graphic symbolpictogramgraphical symbolpictorialpicture used to replace or supplement one or more written words in order to transmit a messageor to represent an object, concept, or function
3.6indicator device that shows or indicates something such as water level or temperature level
3.7inputinput power requirements of equipment including volts, amps, phase, and hertz (frequency)
3.8memorycapability of the equipment, usually microprocessor-based, to store one or more parameters for
recall at a later time
3.9modevolt-ampere curve type of operation such as CC (constant current, drooper) or CV (constantvoltage, flat)
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3.10outputrated output of the equipment at a specific load, and usually expressed in amperes and volts at aspecific duty cycle
3.11plasma arc gougingplasma arc cutting process variation that uses a constricted arc and removes the molten metalwith a high velocity jet of ionized gas issuing from the constricting orifice to form a bevel or groove
3.12programsingle program selected in a multi-program device, usually found on microprocessor-controlledtype of equipment
3.13sequence
various parts of a process cycle such as preflow, initial, weld, crater, final, and postflow
3.14sloperising or falling areas of a process cycle
3.15sourceplace, document, or group from which the symbol element(s) were taken or originated
3.16unit of measurement
unit used to describe a quantityEXAMPLE For current as the quantity, ampere is the unit of measurement.
3.17upslopetime during which the process parameters change from one welding or cutting value to a secondhigher value
4 Identification of parts and application
4.1 General
The symbols are normally placed on equipment to instruct as to its use and operation. In addition,there may be warnings or limits as to use of some controls. In some cases, symbols may be usedto identify the complete package or subassemblies.
The user of equipment can determine the meaning of symbols by referring to Clause 5. Symbolsmay be accompanied by words and phrases until such time that universal recognition is achieved.Words or phrases, to be used in addition to the symbols, are to be selected by the manufacturer (see Annex A for typical examples). The process of selecting symbols for a particular applicationis simplified by the procedure in 4.2.
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4.2 Procedure for parts
The following steps should be taken for parts needing identification that can be expressed withsymbols:
a) list all existing parts and group similar parts together in tabular form; for example: switches,receptacles, and terminals;
b) list the exact function of each part, for example:
1) switch – to control input power;
2) rheostat – to control welding current;
3) lamp – to indicate low oil pressure when lit;
4) terminal – to identify the work lead connection point;
c) list the direction of movement and result of such movement associated with the part; for example:
1) rotate clockwise to increase;
2) push up for ON; down for OFF;3) pull out to STOP;
d) list the command associated with the part; for example: do not switch while welding
e) list the quantity and unit of measurement related to the part; for example:
1) 0-10 dial, in seconds;
2) 0-10 dial, no meaning to graduations;
f) list all items (words or phrases) that are not physical parts, but for which symbols are to beselected; for example: water, high frequency, positive polarity;
g) review the preceding steps to ensure that all physical parts have some distinguishingdescription that clearly states, in an understandable manner, exactly what is to berepresented by graphic symbols; it is important that the language description be clear before
attempting to select symbols.
4.3 Selection of symbols
A symbol may exist that exactly transmits the requirements worked out in the preceding sections.However, it is usually necessary to use a building block approach and use combinations of symbols as required.
Refer to Tables 2 and 3 which list the function keyword or phrase columns and correspondinggraphic symbol number. Select symbols by looking at both the symbol and the function, keywordor phrase columns. List the symbol numbers opposite the parts and items listed from theprocedure described in 4.2. Use this composite list as a guide for preparing the artwork for labelsor screening process. Consistent positioning of each symbol around the device promotes overall
readability.
Alternative methods of applying symbols are shown in the examples in Annex A. Select themethod that best identifies the control or component, how it is to be used, and what is indicated,as needed for the application.
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4.4 Size of symbols
For the application of the symbols it may be necessary either to reduce or to enlarge the originalto a suitable size. In the case of symbols composed of several graphic elements, or whenreducing to minimum height, check that clear identification is still possible and legibility isadequate.
Recommended minimum symbol size is 1/4 inch (6.3 mm) square. It will be necessary to usesound judgment when size reduction is done. Show the proposed size to a typical targetaudience, and carefully check their responses. Consider available light, user distance, andpossible operating conditions as factors during size selection also. Always retain adequate linethickness for reproduction process and user visibility.
4.5 Use of color
In general, the graphic form of a symbol reproduced in black on white or white on black should besufficient for its identification. However, there may be cases in which the meaning of the symbolmay depend on the application of one or more colors. In these cases the relevant colors are
normally specified in the standard regulating or advising that specific area of concern. For thepurposes of this standard and these symbols, adequate contrast between symbol and backgroundis most important. As long as the symbol is clearly delineated and fully legible, actual color selection is not mandatory. Be aware that certain colors, such as red, orange, and yellow, aredesignated safety alerting colors according to ANSI Z535. If necessary for legibility when reducedin size, the symbol may be filled.
5 Graphic symbols
The symbols shown in Table 1 are for use on arc welding and cutting apparatus, except for therating plate; see IEC 60974-1 for symbols used on rating plates. Table 1 presents the symbolsalong with its reference number; function, keyword or phrase, application and source.
NOTE 1 The symbols shown in Table 1 may differ slightly in terms of shading from those shown in the sourcedocument. Table 1 contains all symbols found in Annex L of IEC 60974-1 except those symbols that differ only slightlyfrom symbols from other sources.
NOTE 2 Some functions, keywords, or phrases in Table 1 show more than one symbol. The order in which the symbolsappear imply no order of importance or preference. It is assumed that the user will determine his own importance or preference according to factors such as intended product use and product certification requirements.
Table 2 provides an alphabetical listing by function, keyword or phrase with correspondingsymbol numbers. Table 3 provides a numerical listing by symbol number with correspondingfunction, keyword or phrase.
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Table 1 ― Graphic symbols
NO. SYMBOLFUNCTION, KEYWORD OR
PHRASEAPPLICATION SOURCE(S)
a
1 AMPERAGESignifies amperage or amperage control
IEC 60027-1-67
2 VOLTAGESignifies voltage or voltage control
IEC 60027-1-56
3 HERTZSignifies cycles per second
IEC 60027-1-18
4 FREQUENCY Signifies frequencyIEC 60027-1-
18
5 SECONDSSignifies time inseconds
IEC 60027-1-12
6 TIME Signifies timeIEC 60027-1-
12
7 NEGATIVESignifies negativeswitch position or connection
IEC 60417-1-5006
IEC 60974-1-21
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASEAPPLICATION SOURCE(S)
a
8 POSITIVESignifies positive switch
position or connection
IEC 60417-1-5005
IEC 60974-1-20
9 DIRECT CURRENT (DC) Signifies direct current
IEC 60417-1-5031
IEC 60974-1-75 is similar
10 ALTERNATING CURRENT
(AC)
Signifies alternating
current
IEC 60417-1-5032
IEC 60974-1-76 is similar
11 ALTERNATING CURRENT(AC) AND DIRECTCURRENT (DC)
Signifies alternatingcurrent and directcurrent
IEC 60417-1-5033
IEC 60974-1-77
12 EARTH (GROUND)Signifies the earth
(ground) connection
IEC 60417-1-5017
IEC 60974-1-22
13PROTECTIVE EARTH(GROUND)
Signifies the equipmentconnection point for theprotective earth ground
IEC 60417-1-5019
IEC 60974-1-23
14 FRAME OR CHASSIS
Signifies the frame or
chassis connection
IEC 60417-1-5020
IEC 60974-1-24
15 FUSE Signifies a fuse
IEC 60417-1-5016
IEC 60974-1-25
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASE APPLICATION SOURCE(S)
a
16 INPUT PLUG AND CORDSignifies an inputpower plug and cord
that connects to line
derived from
symbol 17
17 LINE CONNECTIONSignifies a lineconnection
IEC 60417-1-5939
18 AUXILIARY POWERSignifies an auxiliary
power outlet
derived from
symbol 17
19 CIRCUIT BREAKERSignifies a circuitbreaker in an electricalcircuit
ANSI/NEMA
20RECEPTACLE RATING –
AUXILIARY POWER
Signifies the receptacle
rating ANSI/NEMA
21 SINGLE PHASE Signifies single phasederived fromIEC 60974-1-
76
22 THREE PHASE Signifies three phase
derived from
IEC 60974-1-76
23 TRANSFORMER Identifies a transformer
IEC 60417-1-5156
IEC 60974-1-78
1
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASE APPLICATION SOURCE(S)
a
24SINGLE PHASE
TRANSFORMER
Signifies a single phase
transformer
derived from
IEC 60974-1
25SINGLE PHASETRANSFORMER RECTIFIER
Signifies a single phasetransformer and rectifier
derived fromIEC 60974-1
26THREE PHASE
TRANSFORMER RECTIFIER
Signifies a three phase
transformer and rectifier
IEC 60974-1,
Annex L.4
27 GENERATOR Identifies a generator
ISO 7000-0147
IEC 60974-1-79
28DIRECT CURRENTGENERATOR WITHCOMMUTATOR
Signifies a direct currentgenerator withcommutator
IEC 60974-1,
15.3
29SINGLE PHASE
ALTERNATORSignifies a single phasealternator
IEC 60974-1,15.3
30
THREE PHASE ALTERNATOR
WITH RECTIFIER
Signifies a three phase
alternator with rectifier
derived from
IEC 60974-1,15.3
31THREE PHASE MOTORTHREE PHASE ALTERNATORRECTIFIER
Signifies a motor-driventhree phase alternator and rectifier
IEC 60974-1,15.3
1~
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASEAPPLICATION SOURCE(S)
a
32 MOTORIdentifies an electric
motor
ISO 7000-0147
IEC 60974-1-81
33 MOTOR GENERATORSignifies a motor generator
IEC 60974-1,15.3
34
SINGLE PHASETRANSFORMER AC AND
RECTIFIED DC POWERSOURCE
Signifies a single phasetransformer with single
phase AC output andrectified DC output
IEC 60974-1,
15.3
35 INVERTERIdentifies a frequencyconversion stagefunction
IEC 60974-1-82
36SINGLE PHASE STATICFREQUENCY CONVERTERTRANSFORMER RECTIFIER
Signifies a single phasestatic frequency
converter, transformer and rectifier
IEC 60974-1,
15.3
37THREE PHASE STATICFREQUENCY CONVERTERTRANSFORMER RECTIFIER
Signifies a three phasestatic frequencyconverter, transformer and rectifier
IEC 60974-1,15.3
38 DC/AC CONVERTER
Identifies a DC/ACconverter and its
associated terminalsand controls
IEC 60417-1-5194
IEC 60974-1-83
39 DANGEROUS VOLTAGESignifies a dangerousvoltage
IEC 60417-1-5036
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASE APPLICATION SOURCE(S)
a
40
SUITABLE FOR WELDING IN AN ENVIRONMENT WITH
INCREASED RISK OFELECTRIC SHOCK
Identifies a weldingpower source suitablefor welding in an
environment with anincreased risk of electric shock
IEC 60974-1-
84
41 CLASS II EQUIPMENTIdentifies class IIequipment
IEC 60417-1-5172
IEC 60974-1-85
42 GAS SUPPLY Signifies a gas supplyIEC 60974-1-
31
43 GAS TYPESignifies the type of gas, such as Argon,CO2
derived fromIEC 60974-1-
31
44 MATERIAL TYPESignifies the type of material to be weldedor cut
ANSI/NEMA
45 MATERIAL THICKNESSSignifies the thicknessof the material to bewelded or cut
ANSI/NEMA
46 DIAMETER mm (in)
Signifies diameter,
such as diameter of wire or electrode
derived from
IEC 60974-1
47 INPUT Signifies input
IEC 60417-1-5034
IEC 60974-1-39
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASE APPLICATION SOURCE(S)
a
48 OUTPUT Signifies output
IEC 60417-1-5035
IEC 60974-1-40
49INPUT POWER OR INPUTVOLTAGE
Signifies either inputpower or input voltage
IEC 60974-1,L.5 (derived
from IEC60417-1-
5034)
50 WATER (COOLANT) INPUTSignifies water
(coolant) input
IEC 60974-1,
L.4
51 WATER (COOLANT) OUTPUTSignifies water (coolant) output
derived fromsymbol 50
52 GAS INPUT Signifies gas inputderived fromsymbols 42
and 47
53 GAS OUTPUT Signifies gas outputderived from
symbol 42and 48
54 OFF
Signifies an OFF
position of a switch or control
IEC 60417-1-5008 and IEC
60974-1-3 aresimilar
55 ONSignifies an ONposition of a switch or control
IEC 60417-1-5007 and IEC60974-1-2 are
similar
IEC 609
v
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASE APPLICATION SOURCE(S)
a
56INCREASE/DECREASE OFQUANTITY (ROTATING;
NUMBER OF POSITIONS)
Signifies an increase/decrease of quantity
with a rotary control insteps
derived from
symbol 57
57INCREASE/DECREASE OFQUANTITY (ROTATING; WITHOFF POSITIONS)
Signifies an increase/decrease of quantity
IEC 60974-1,L.4
58INCREASE/DECREASE OF
QUANTITY (ROTATING)
Signifies an increase/decrease of quantity
with a rotary controlcontinuously variable
derived from
symbol 57
59INCREASE/DECREASE OFQUANTITY (LINEAR,NUMBER OF POSITIONS)
Signifies an increase/decrease of a quantity(linear) in coarse stepsusually by a switch
derived fromsymbol 60
60INCREASE/DECREASE OF
QUANTITY (LINEAR)
Signifies an increase/decrease of a quantity(linear) continuouslyvariable usually by apotentiometer
IEC 60974-1-
1
61DIRECTION OFCONTINUOUS ROTATION(CLOCKWISE)
Signifies continuousclockwise rotarymotion; for counter-clockwise motionsymbol is reversed
ISO 7000-0004
IEC 60974-1-18 is similar
62
DIRECTION OF
CONTINUOUS ROTATION(COUNTER-CLOCKWISE)
Signifies continuouscounter-clockwiserotary motion; for
counter-clockwisemotion symbol isreversed
IEC 60974-1-
19 is similar
63DO NOT SWITCH WHILEWELDING
Signifies that switchingwhile welding isprohibited
partiallyderived fromISO 7000 -
0459
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASE APPLICATION SOURCE(S)
a
64 PANEL/LOCAL
Signifies panel/localfunction or switch suchas a switch to change
between a local andremote control
IEC 60974-1-
39
65 DIRECTIONAL ARROW Signifies a directionderived fromsymbols 61
and 62
66 REMOTESignifies a remotecontrol connection or function
ISO 7000-0093
IEC 60974-1-37
67 PUSHBUTTON SWITCH (IN)Signifies the IN positionof a push button control
IEC 60417-1-5268
IEC 60974-1-4 is similar
68PUSHBUTTON SWITCH
(OUT)
Signifies the OUTposition of a pushbutton control
IEC 60417-1-5269
IEC 60974-1-5 is similar
69 START OF ACTIONSignifies the start (of action) function or control
IEC 60417-1-5104
70 STOP OF ACTION
Signifies the stop (of
action) function or control
IEC 60417-1-
5110
71 FOOT CONTROLSignifies a foot controldevice; function,connection or control
IEC 60974-1-38
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASE APPLICATION SOURCE(S)
a
72 MANUAL CONTROL
Signifies the switchposition for manual
control as opposed toautomatic control
ISO 7000-0096
IEC 60974-1-11
73a CAUTION
Signifies that theoperator should beaware of a generalhazard
ISO 7000-0434A
IEC 60974-1-89
73b CAUTION
Signifies that theoperator should beaware of a generalhazard
ISO 3864-2
ISO 17846-1
74a READ OPERATOR'S MANUALSignifies that theoperator's manualshould be read
ISO 7000-0790
IEC 60974-1-
90
74b READ OPERATOR'S MANUALSignifies that theoperator's manualshould be read
ISO 17846, A.3-1
ANSI/NEMA
75 WELDING (GENERAL) Signifies weldingISO 7000-
0459
76SHIELDED METAL ARCWELDING (SMAW)
Signifies the SMAWprocess, function, or control
ISO 7000-0460
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASE APPLICATION SOURCE(S)
a
77 MMA WELDING Identifies MMA weldingIEC 60974-1-
58
78aGAS METAL ARC WELDING(GMAW)
Signifies the GMAWprocess, function, or control
ISO 7000-0461
symbol in IEC60974-1, L.4
is similar
78bGAS METAL ARC WELDING(GMAW)
Signifies the GMAWprocess, function, or control
IEC 60974-1-60
79aFLUX CORED ARC WELDING(FCAW)
Signifies the FCAW(without gas shielding)process, function, or
control
derived fromISO 7000-
0459 and IEC
60974-1-61
79bFLUX CORED ARC WELDING(FCAW)
Signifies the FCAW(without gas shielding)process, function, or control
IEC 60974-1-61
80aSUBMERGED ARC WELDING(SAW)
Signifies the SAWprocess, function, or control
ISO 7000-0467
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASE APPLICATION SOURCE(S)
a
80bSUBMERGED ARC WELDING(SAW)
Signifies the SAWprocess, function, or control
IEC 60974-1-66
81a
GAS TUNGSTEN ARCWELDING (GTAW) /TUNGSTEN INERT GAS (TIG)WELDING
Signifies the GTAW/TIGprocess, function, or control
ISO 7000-0462
81bGAS TUNGSTEN ARCWELDING (GTAW) /TUNGSTEN INERT GAS (TIG)
Signifies the GTAW/TIGprocess, function, or control
IEC 60974-1-62
82 AIR CARBON ARC GOUGINGSignifies air carbon arcgouging
IEC 60974-1-59
83PLASMA ARC CUTTING(PAC)
Signifies the PACprocess, function, or control
ISO 7000-0479
84PLASMA ARC WELDING(PAW)
Signifies the PAWprocess, function, or control
ISO 7000-0478
85PLASMA ARC GOUGING(PAG)
Signifies the PAGprocess, function, or control
IEC 60974-1-65
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASEAPPLICATION SOURCE(S)
a
86 SPRAY TRANSFER Signifies spray transfer ISO 7000-
0472
87SHORT CIRCUITINGTRANSFER
Signifies shortcircuiting transfer
ISO 7000-0471
88 PULSE TRANSFER Signifies pulse transfer ISO 7000-
0473
89 ARC SPOT WELDINGSignifies arc spotwelding
ISO 7000-0468
90a CONTINUOUS WELDINGSignifies a continuouswelding process,function, or control
ISO 7000-
0831
90b CONTINUOUS WELDINGSignifies a continuouswelding process,function, or control
IEC 60974-1-8
91a
INTERMITTENT (STITCH)
WELDING
Signifies an intermittent(stitch) welding
process, function, or control
ISO 7000-
0832
91bINTERMITTENT (STITCH)WELDING
Signifies an intermittent(stitch) weldingprocess, function, or control
IEC 60974-1-9
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASEAPPLICATION SOURCE(S)
a
92a GTAW SPOT WELDINGSignifies GTAW spot
welding
ISO 7000-
0470
92b GTAW SPOT WELDINGSignifies GTAW spotwelding
derived fromISO 7000 andIEC 60974-1
93 GMAW SPOT WELDINGSignifies GMAW spot
welding
ISO 7000-
0469
94 CONSTANT CURRENTSignifies a constantcurrent (drooping)characteristic
ISO 7000-0454
IEC 60974-1-68
95
CONSTANT VOLTAGE OR
CONSTANT POTENTIAL
Signifies a constantvoltage characteristic
(substantially level loadvoltage characteristic)
ISO 7000-0455
IEC 60974-1-67
96 ELECTRODE CONNECTIONSignifies an electrodeconnection
ANSI/NEMA
97 WORK CONNECTION
Signifies workpiece
connection
ISO 7000-
0453
98PLASMA TORCHCONNECTION AND NOZZLE(POSITIVE SUPPLY)
Signifies a plasmatorch connection andnozzle (positive supply)
ISO 7000-0483
IEC 60974-1-27
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASEAPPLICATION SOURCE(S)
a
99PLASMA TORCHCONNECTION TO NEGATIVE
ELECTRODE
Signifies a plasmatorch connection to
negative electrode(negative supply)
ISO 7000-0482
IEC 60974-1-28
100 ELECTRODE POSITIVESignifies electrodepositive connection or switch position
derived fromISO 7000-
0459
101 ELECTRODE NEGATIVESignifies electrodenegative connection or switch position
derived from
ISO 7000-0459
102SHIELDED METAL ARC(SMAW) ELECTRODEHOLDER
Signifies a SMAWelectrode holder
ISO 7000-0463
IEC 60974-1-49
103aGAS METAL ARC WELDING
(GMAW) GUN
Signifies a GMAW gun(torch) with or withoutgas shielding
ISO 7000-
0464
103bGAS METAL ARC WELDING(GMAW) GUN
Signifies a GMAW gun(torch) with or withoutgas shielding
IEC 60974-1-51
104
SELF-SHIELDED FLUX
CORED ARC WELDINGTORCH
Identifies a self shielded flux cored arc
welding torch withoutgas shielding
IEC 60974-1-
52
105FLUX CORED ARC WELDING(FCAW) GUN
Signifies a FCAW gun(torch) with or withoutgas shielding
derived fromIEC 60974-1-
52
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASE APPLICATION SOURCE(S)
a
106 WIRE FEED SPOOL GUN
Signifies a spool gun,which consists of a
welding gun and smallspool of electrode
IEC 60974-1-
56
107aGAS TUNGSTEN ARCWELDING (GTAW) TORCH
Signifies a GTAW torchISO 7000-
0465
107bGAS TUNGSTEN ARC
WELDING (GTAW) TORCHSignifies a GTAW torch
IEC 60974-1-
53
108 AIR CARBON ARC GOUGINGELECTRODE HOLDER
Signifies an air carbonarc gouging electrodeholder
IEC 60974-1-50
109 PLASMA TORCHSignifies a plasma
torch
ISO 7000-0477
IEC 60974-1-54
110 MOTORIZED GUNIdentifies a gunincorporating a wiredrive system
IEC 60974-1-55
111
MOTORIZED GUN WITH
FILLER WIRE SUPPLY
Identifies a gunincorporating a wire
drive system andincluding a filler wiresupply
IEC 60974-1-
56
112 SUBMERGED ARC TORCHIdentifies a torch for submerged arc welding
IEC 60974-1-57
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASEAPPLICATION SOURCE(S)
a
113GMAW GUN SWITCH/
CONTROL
Signifies a GMAW gunswitch/control used to
change weldingparameters
ANSI/NEMA
114GTAW TORCH SWITCH/CONTROL
Signifies a GTAW torchswitch/control used tochange weldingparameters
ANSI/NEMA
115 FCAW GUN WITH SWITCHSignifies a FCAW gun
with switch ANSI/NEMA
116 GMAW GUN WITH SWITCHSignifies a GMAW gunwith switch
ANSI/NEMA
117 GTAW TORCH WITH SWITCHSignifies a GTAW torch
with switch ANSI/NEMA
118VENTILATING AND AIRCIRCULATING FAN
Signifies a ventilatingfan or air circulating fan
ISO 7000-0089
IEC 60974-1-42
119 LIQUID
Signifies a liquid, e.g.,
coolant
IEC 60974-1-
30
120 COOLINGSignifies cooling of components or system
ISO 7000-0027
IEC 60974-1-41
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASEAPPLICATION SOURCE(S)
a
121 COOLING WITH LIQUIDSignifies cooling with
liquid
ISO 7000-
0544
122 COOLING PUMPSignifies a coolingpump
ISO 7000-0355
123 TEMPERATURE INDICATION
Identifies thetemperature indication;for example, an excesstemperature warninglight
IEC 60974-1-
91
124 DISTURBANCE
Signifies a disturbancein the proper run of aprocedure; for example,a light indication of acircuit overload
ISO 7000-0228
125 AUTOMATIC CYCLE
Signifies an automaticsequence of machinefunctions repeatedcontinuously withoutmanual intervention
ISO 7000-
0026
126 ONE CYCLESignifies one cycle; for example, on a controlof a machine tool
ISO 7000-0426
127 PROGRAM
Signifies a programfunction or control,
such a found on amicroprocessor controlcircuit
ISO 7000-
0982
128 SAVE TO MEMORYSignifies a saving tomemory function or control
ANSI/NEMA
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASEAPPLICATION SOURCE(S)
a
129 RECALL FROM MEMORYSignifies a recall frommemory function or
control
ANSI/NEMA
130 DIGITAL DISPLAYSignifies a digitaldisplay function or control
derived fromISO 7000-
2168
symbol shownin IEC 60974-
1, L.5 issimilar
131 CLOCK, TIME SWITCHSignifies a clock, timeswitch or time
IEC 60417-1-5184
132 PERCENT Signifies percent ANSI/NEMA
133 PROCESS CYCLESignifies one completeprocess cycle
ANSI/NEMA
134 PERCENT ON TIMESignifies percent ontime (duty cycle)function or control
ANSI/NEMA
135 PULSESignifies a pulsefunction or control
IEC 60974-1-70
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASEAPPLICATION SOURCE(S)
a
136 PULSE BACKGROUNDIndicates a control of
pulse background
IEC 60974-1-
44
137 PULSE PEAKIndicates a control of pulse peak
IEC 60974-1-45
138 SOFT STARTSignifies a soft start of
welding current ANSI/NEMA
139a HOT STARTSignifies a hot start of welding voltage
IEC 60974-1-46
139b HOT STARTSignifies a hot start of
welding voltage ANSI/NEMA
140 SLOPE (INCREASING)Indicates a control or function regulating theincrease of a value
IEC 60974-1-47
141 SLOPE (DECREASING)
Indicates a control or
function regulating theincrease of a value
IEC 60974-1-
48
142 ARC FORCESignifies the arc forcefunction or control
IEC 60974-1-69
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASEAPPLICATION SOURCE(S)
a
143HIGH FREQUENCY
(GENERAL)
Signifies a highfrequency connection
or function
ANSI/NEMA
144HIGH FREQUENCY ON – CONTINUOUS
Signifies the highfrequency is oncontinuously during theweld cycle
ANSI/NEMA
145aHIGH FREQUENCY ON –
START ONLY
Signifies the highfrequency is on at startonly
ISO 7000-
0476
145bHIGH FREQUENCY ON -START ONLY
Signifies the highfrequency is on at startonly
ANSI/NEMA
146TWO-STEP TRIGGER
OPERATION (GTAW)
Signifies a two-steptrigger operation of aGTAW torch; press tostart, release to go intocrater fill and stop
ANSI/NEMA
147FOUR-STEP TRIGGEROPERATION (GTAW)
Signifies a four-steptrigger operation of aGTAW torch; press tostart, release after arcignition, weld, press togo into crater fill,release to stop
ANSI/NEMA
148 TWO-STEP TRIGGEROPERATION (GMAW)
Signifies a two-steptrigger operation of a
semi-automatic gun;press to initiate wirefeed and welding,release to stop
ANSI/NEMA
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASE APPLICATION SOURCE(S)
a
149
FOUR-STEP TRIGGER
OPERATION (GMAW)
Signifies a four-steptrigger operation of asemi-automatic gun;
press to start, releaseafter arc ignition, weld,then press and releaseto stop
ANSI/NEMA
150a IMPULSE START (GTAW)Signifies ignition of GTAW by an impulseother than HF
ANSI/NEMA
150b IMPULSE START (GTAW)Signifies ignition of GTAW by an impulseother than HF
IEC 60974-1-
12
151a TOUCH START (GTAW)Signifies ignition of GTAW by touching theworkpiece and lifting
ANSI/NEMA
151b TOUCH START (GTAW)
Signifies ignition of
GTAW by touching theworkpiece and lifting
IEC 60974-1-
13
152 WAVE BALANCESignifies an AC wavebalance function or control
ANSI/NEMA
153 MAXIMUM CLEANING
Signifies the maximumcleaning (minimum
penetration) of a GTAWprocess, function, or control
ANSI/NEMA
154 MAXIMUM PENETRATION
Signifies the maximumpenetration (minimumcleaning) of a GTAWprocess, function, or control
ANSI/NEMA
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASEAPPLICATION SOURCE(S)
a
155 PURGE BY GASSignifies purging of air
(by gas)
ISO 7000-
0474
156 GAS POSTFLOWSignifies gas postflowtime
ANSI/NEMA,derived fromISO 7000-
0474
157 GAS PREFLOWSignifies gas preflow
time
ANSI/NEMA,derived from
ISO 7000-0474
158 LOW INDUCTANCESignifies lowinductance: connection,function or control
IEC 60974-1-74
159 MEDIUM INDUCTANCESignifies mediuminductance: connection,function or control
IEC 60974-1-
73
160HIGH INDUCTANCE ORINDUCTANCE
Signifies inductance, or when used with other inductance symbols,high inductance
IEC 60974-1-72
161 VARIABLE INDUCTANCE
Signifies a variable
inductance function or control
IEC 60974-1-
71
162 PLASMA GAS Signifies plasma gasISO 7000-
0480
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASE APPLICATION SOURCE(S)
a
163 PLASMA SHIELDING GASSignifies plasma
shielding gas
ISO 7000-
0481
164 PILOT/PULSE STARTINGSignifies pilot or pulsestarting of a plasmatorch
ANSI/NEMA
165 PILOT ARC STARTING
Identifies a TIG arcstriking function which
initiates an arc withcontact
IEC 60974-1-
14
166 WIRE FEEDSignifies a wire feedunit or wire feedfunction
derived fromISO 7000-
0823 and IEC60974-1-16
167 WIRE FEED FORWARDSignifies the feeding of wire forward towardsthe workpiece
ANSI/NEMA
168 WIRE FEED REVERSESignifies the feeding of wire away from theworkpiece
ANSI/NEMA
169
WIRE FEED INTERMITTENT
(STITCH)/INTERRUPTED
Signifiesintermittent/interrupted
wire feed, such asstitching
ISO 7000-
0825
170COLD JOG (INCH) TOWARDWORKPIECE
Signifies the feeding of wire toward theworkpiece with outputvoltage off
ANSI/NEMA
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASE APPLICATION SOURCE(S)
a
171COLD JOG (INCH) AWAY
FROM WORKPIECE
Signifies the feeding of wire away from the
workpiece with outputvoltage off
ANSI/NEMA
172 WIRE FEED SLOW RUN-IN
Signifies the slow runor feed of wire towardthe workpiece beforewelding
ANSI/NEMA
173 WIRE DIAMETER
Signifies the wirediameter of welding
electrode: function or control
ANSI/NEMA
174 WIRE TYPESignifies the type of welding electrode, suchas steel or aluminum
ANSI/NEMA
175 MELTBACK (BURNBACK)Signifies meltback(burnback) time at theend of a weld
ANSI/NEMA
176 WIRE BURNBACK CONTROLIdentifies burnbackcontrol at the end of theweld
IEC 60974-1-17
177 ARC IGNITION BY CONTACT
Signifies arc ignition by
contact
ISO 7000-
0475
178 AIR FLOW Identifies air flowIEC 60974-1-
29
Ø MM (IN)
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASEAPPLICATION SOURCE(S)
a
179a AIR PRESSURESignifies air pressure
function or control
ANSI/NEMA
179b AIR PRESSURESignifies air pressurefunction or control
IEC 60974-1-34
180a HOPPERSignifies a flux
(powder) hopper
ISO 7000-
0466
180b HOPPERSignifies a flux(powder) hopper
IEC 60974-1-40
181 ARC WELDING EQUIPMENT
CARRIAGE
Signifies a welding
carriage
ISO 7000-
0451
182 TIGHTEN OR CLAMP
Signifies the function of tightening or clampingtwo machine elementstogether
ISO 7000-0018
183 UNTIGHTEN OR UNCLAMP
Signifies the function of releasing two machine
elements tightened or clamped together
ISO 7000-
0019
184 BLOWINGSignifies the productionof a current of air flowdirected at an object
ISO 7000-0032
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASEAPPLICATION SOURCE(S)
a
185 SUCTIONSignifies the generationof air flow by use of
suction
ISO 7000-
0033
186 TORCHSignifies a welding or cutting torch
ANSI/NEMA
187 OSCILLATIONSignifies oscillationsuch as the oscillationof a welding torch
ISO 7000-
0003
188 ENGINE OIL
Signifies the engine oilindicator on theinstrument panel or oilfilling area
ISO 7000-0248
189 PULL TO STOP ENGINESignifies the pull device
used to stop the engine ANSI/NEMA
190 ENGINE CHOKE
Signifies the operatingdevice of the choke(cold starting aid) onthe instrument panel
ISO 7000-0243
191 FUEL Signifies fuel
ISO 7000-0245
SAE-0245
192 ENGINE COOLANTSignifies the enginecoolant radiator or reservoir
ANSI/NEMA
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASEAPPLICATION SOURCE(S)
a
193ENGINE COOLANT
TEMPERATURE
Signifies the enginecoolant temperature
indicator on theinstrument panel
ISO 7000-
0246
194 BATTERY (ENGINE)Signifies the batterycharging condition onthe instrument panel
ISO 7000-0247
195a AIR FILTER Signifies an air filter ANSI/NEMA
195b AIR FILTER Signifies an air filter IEC 60974-1-
43
196a ENGINESignifies a gasoline or
diesel engine
ISO 7000-1156
SAE-1156
196b ENGINESignifies a gasoline or diesel engine
ISO 7000-0796
IEC 60974-1-80
196c ENGINE
Signifies a gasoline or
diesel engine
ISO 7000-
0640
197 ENGINE RPM Signifies engine RPM SAE-2303
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASEAPPLICATION SOURCE(S)
a
198a ENGINE STOPSignifies the stopengine function or
control
ANSI/NEMA
198b ENGINE STOPSignifies the stopengine function or control
ISO 7000-1388
199 GLOW PLUGSignifies a glow plugfunction or indicator ona diesel engine
SAE-1704
200 ENGINE STARTSignifies the startfunction or control of anengine welder
ISO 7000-1387
SAE-1387
201 ELECTRIC MOTORSignifies an electric
motor ANSI/NEMA
202 HOUR METERSignifies an hour meter function or indicator
SAE-1366
203 ELAPSED ENGINE HOURS
Signifies the elapsed
engine hours
composite of SAE-1156
and SAE-1366
204 FUEL SHUTOFFSignifies the fuelshutoff to an engine
SAE-1395
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NO. SYMBOLFUNCTION, KEYWORD OR
PHRASEAPPLICATION SOURCE(S)
a
205 SLOW Signifies slow action or operation
SAE (symbolis published
in ISO 3767-1without aregistration
number)
206 FASTSignifies fast action or operation
SAE (symbolis published
in ISO 3767-1without a
registrationnumber)
207 UNLOCKEDSignifies an unlockedfunction or control
IEC 60417-1-5570
SAE
208 LOCKEDSignifies a lockedfunction or control
IEC 60417-1-5569
SAE
aExplanation of source acronyms:
ANSI American National Standards Inst ituteIEC International Electrotechnical CommissionISO International Organization for StandardizationNEMA National Electrical Manufacturers AssociationSAE Society of Automotive Engineers
There can be up to three numbers following the acronym of a source, e.g., IEC 60417-1-5110. The first number represents the number of the standard, the second number represents the part of the standard, and the third number represents the symbol number listed in a table of symbols or the clause/annex of the standard in which the symbolappears. If a standard does not have more than one part, e.g., ISO 7000, there will be no second number. Similarly, if a source has no numerical designation, e.g., SAE Handbook, there will be no first number ― and, for that matter, nosecond number as well.
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Table 2 ― Alphabetical list of function, keyword, or phrase
Table 1Symbol No.
AIR CARBON ARC GOUGING ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 82
AIR CARBON ARC GOUGING ELECTRODE HOLDER ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 108
AIR FILTER ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. 195a,b
AIR FLOW ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 178
AIR PRESSURE ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 179a,b
ALTERNATING CURRENT (AC) ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 10
ALTERNATING CURRENT (AC) AND DIRECT CURRENT (DC)... ... ... ... ... ... ... ... ... ... ... 11
AMPERAGE ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 1
ARC FORCE ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 142
ARC IGNITION BY CONTACT.. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 177
ARC SPOT WELDING ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 89
ARC WELDING EQUIPMENT CARRIAGE ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. 181
AUTOMATIC CYCLE ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 125 AUXILIARY POWER ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . 18
BATTERY (ENGINE)................................................................................................. 194
BLOWING ................................................................................................................ 184
CAUTION................................................................................................................. 73a,b
CIRCUIT BREAKER.................................................................................................. 19
CLASS II EQUIPMENT ............................................................................................. 41
CLOCK, TIME SWITCH ............................................................................................ 131
COLD JOG (INCH) AWAY FROM WORKPIECE......................................................... 171
COLD JOG (INCH) TOWARD WORKPIECE .............................................................. 170
CONSTANT CURRENT ............................................................................................ 94
CONSTANT VOLTAGE OR CONSTANT POTENTIAL ................................................ 95CONTINUOUS WELDING ......................................................................................... 90a,b
COOLING................................................................................................................. 120
COOLING PUMP ...................................................................................................... 122
COOLING WITH L\QUID........................................................................................... 121
DANGEROUS VOLTAGE.......................................................................................... 39
DC/AC CONVERTER................................................................................................ 38
DIAMETER mm (in) .................................................................................................. 46
DIGITAL DISPLAY.................................................................................................... 130
DIRECT CURRENT (DC) .......................................................................................... 9
DIRECT CURRENT GENERATOR WITH COMMUTATOR.......................................... 28
DIRECTION OF CONTINUOUS ROTATION (CLOCKWISE) ....................................... 61
DIRECTION OF CONTINUOUS ROTATION (COUNTER-CLOCKWISE) ..................... 62
DIRECTIONAL ARROW............................................................................................ 65
DISTURBANCE ........................................................................................................ 124
DO NOT SWITCH WHILE WELDING......................................................................... 63
EARTH (GROUND)................................................................................................... 12
ELAPSED ENGINE HOURS...................................................................................... 203
ELECTRIC MOTOR .................................................................................................. 201
ELECTRODE CONNECTION .................................................................................... 96
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Table 1Symbol No.
ELECTRODE NEGATIVE.......................................................................................... 101
ELECTRODE POSITIVE ........................................................................................... 100
ENGINE ................................................................................................................... 196a,b,cENGINE CHOKE ...................................................................................................... 190
ENGINE COOLANT .................................................................................................. 192
ENGINE COOLANT TEMPERATURE ........................................................................ 193
ENGINE OIL............................................................................................................. 188
ENGINE RPM........................................................................................................... 197
ENGINE START ....................................................................................................... 200
ENGINE STOP ......................................................................................................... 198a,b
FAST ....................................................................................................................... 206
FCAW GUN WITH SWITCH ...................................................................................... 115
FLUX CORED ARC WELDING (FCAW) ..................................................................... 79a,b
FLUX CORED ARC WELDING (FCAW) GUN ............................................................ 105
FOOT CONTROL...................................................................................................... 71
FOUR-STEP TRIGGER OPERATION (GTAW)........................................................... 147
FRAME OR CHASSIS............................................................................................... 14
FREQUENCY ........................................................................................................... 4
FUEL ....................................................................................................................... 191
FUEL SHUTOFF....................................................................................................... 204
FUSE ....................................................................................................................... 15
GAS INPUT.............................................................................................................. 52
GAS METAL ARC WELDING (GMAW) ...................................................................... 78a,b
GAS METAL ARC WELDING (GMAW) GUN .............................................................. 103a,b
GAS OUTPUT .......................................................................................................... 53
GAS POSTFLOW ..................................................................................................... 156GAS POSTFLOW ..................................................................................................... 157
GAS SUPPLY........................................................................................................... 42
GAS TUNGSTEN ARC WELDING (GTAW) TORCH ................................................... 107a,b
GAS TUNGSTEN ARC WELDING (GTAW)/TUNGSTEN INERT GAS (TIG)WELDING ................................................................................................................
81a,b
GAS TYPE ............................................................................................................... 43
GENERATOR ........................................................................................................... 27
GLOW PLUG............................................................................................................ 199
GMAW GUN SWITCH/CONTROL.............................................................................. 113
GMAW GUN WITH SWITCH ..................................................................................... 116
GMAW SPOT WELDING........................................................................................... 93GTAW SPOT WELDING ........................................................................................... 92a,b
GTAW TORCH SWITCH/CONTROL.......................................................................... 114
GTAW TORCH WITH SWITCH.................................................................................. 117
HERTZ..................................................................................................................... 3
HIGH FREQUENCY (GENERAL)............................................................................... 143
HIGH FREQUENCY ON – CONTINUOUS.................................................................. 144
HIGH FREQUENCY ON – START ONLY ................................................................... 145a,b
HIGH INDUCTANCE OR INDUCTANCE .................................................................... 160
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Table 1Symbol No.
HOPPER.................................................................................................................. 180a,b
HOT START ............................................................................................................. 139a,b
HOUR METER.......................................................................................................... 202IMPULSE START (GTAW) ........................................................................................ 150a,b
INCREASE/DECREASE OF QUANTITY (LINEAR)..................................................... 60
INCREASE/DECREASE OF QUANTITY (LINEAR; NUMBER OF POSITIONS) ........... 59
INCREASE/DECREASE OF QUANTITY (ROTATING)................................................ 58
INCREASE/DECREASE OF QUANTITY (ROTATING; NUMBER OF POSITIONS) ...... 56
INCREASE/DECREASE OF QUANTITY (ROTATING; WITH OFF POSITION) ............ 57
INPUT ...................................................................................................................... 47
INPUT PLUG AND CORD ......................................................................................... 16
INTERMITTENT (STITCH) WELDING ....................................................................... 91a,b
INVERTER ............................................................................................................... 35
LINE CONNECTION ................................................................................................. 17
LIQUID..................................................................................................................... 119
LOCKED .................................................................................................................. 208
LOW INDUCTANCE.................................................................................................. 158
MANUAL CONTROL................................................................................................. 72
MATERIAL THICKNESS ........................................................................................... 45
MATERIAL TYPE...................................................................................................... 44
MAXIMUM CLEANING .............................................................................................. 153
MAXIMUM PENETRATION ....................................................................................... 154
MEDIUM INDUCTANCE............................................................................................ 159
MELTBACK (BURNBACK) ........................................................................................ 175
MMA WELDING........................................................................................................ 77
MOTOR.................................................................................................................... 32MOTOR GENERATOR.............................................................................................. 33
MOTORIZED GUN.................................................................................................... 110
MOTORIZED GUN WITH FILLER WIRE SUPPLY ...................................................... 111
NEGATIVE ............................................................................................................... 7
OFF ......................................................................................................................... 54
ON ........................................................................................................................... 55
ONE CYCLE............................................................................................................. 126
OSCILLATION.......................................................................................................... 187
OUTPUT .................................................................................................................. 48
PANEL/LOCAL ......................................................................................................... 64
PERCENT ................................................................................................................ 132PERCENT ON TIME ................................................................................................. 134
PILOT ARC STARTING ............................................................................................ 165
PILOT/PULSE STARTING ........................................................................................ 164
PLASMA ARC CUTTING (PAC) ................................................................................ 83
PLASMA ARC GOUGING (PAG) ............................................................................... 85
PLASMA ARC WELDING (PAW) ............................................................................... 84
PLASMA GAS........................................................................................................... 162
PLASMA SHIELDING GAS ....................................................................................... 163
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Table 1Symbol No.
PLASMA TORCH...................................................................................................... 109
PLASMA TORCH CONNECTION AND NOZZLE (POSITIVE SUPPLY) ....................... 98
PLASMA TORCH CONNECTION TO NEGATIVE ELECTRODE ................................. 99POSITIVE................................................................................................................. 8
PROCESS CYCLE.................................................................................................... 133
PROGRAM............................................................................................................... 127
PROTECTIVE EARTH (GROUND) ............................................................................ 13
PULL TO STOP ENGINE .......................................................................................... 189
PULSE ..................................................................................................................... 135
PULSE BACKGROUND ............................................................................................ 136
PULSE PEAK ........................................................................................................... 137
PULSE TRANSFER .................................................................................................. 88
PURGE BY GAS....................................................................................................... 155
PUSHBUTTON SWITCH (IN) .................................................................................... 67
PUSHBUTTON SWITCH (OUT)................................................................................. 68
READ OPERATOR'S MANUAL ................................................................................. 74a,b
RECALL FROM MEMORY ........................................................................................ 129
RECEPTACLE RATING – AUXILIARY POWER ......................................................... 20
REMOTE.................................................................................................................. 66
SAVE TO MEMORY.................................................................................................. 128
SECONDS................................................................................................................ 5
SELF SHIELDED FLUX CORED ARC WELDING TORCH .......................................... 104
SHIELDED METAL ARC (SMAW) ELECTRODE HOLDER ......................................... 102
SHIELDED METAL ARC WELDING (SMAW) ............................................................. 76
SHORT CIRCUITING TRANSFER............................................................................. 87
SINGLE PHASE ....................................................................................................... 21SINGLE PHASE ALTERNATOR ................................................................................ 29
SINGLE PHASE STATIC FREQUENCY CONVERTER TRANSFORMER
RECTIFIER ..............................................................................................................
36
SINGLE PHASE TRANSFORMER............................................................................. 24
SINGLE PHASE TRANSFORMER AC AND RECTIFIED DC POWER SOURCE.......... 34
SINGLE PHASE TRANSFORMER RECTIFIER .......................................................... 25
SLOPE (DECREASING)............................................................................................ 141
SLOPE (INCREASING)............................................................................................. 140
SLOW ...................................................................................................................... 205
SOFT START ........................................................................................................... 138
SPRAY TRANSFER.................................................................................................. 86START OF ACTION.................................................................................................. 69
STOP OF ACTION.................................................................................................... 70
SUBMERGED ARC TORCH...................................................................................... 112
SUBMERGED ARC WELDING (SAW) ....................................................................... 80a,b
SUCTION................................................................................................................. 185
SUITABLE FOR WELDING IN AN ENVIRONMENT WITH INCREASED RISK OFELECTRIC SHOCK...................................................................................................
40
TEMPERATURE INDICATION .................................................................................. 123
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Table 1Symbol No.
THREE PHASE ........................................................................................................ 22
THREE PHASE ALTERNATOR WITH RECTIFIER..................................................... 30
THREE PHASE MOTOR THREE PHASE ALTERNATOR RECTIFIER ........................ 31THREE PHASE STATIC FREQUENCY CONVERTER TRANSFORMER
RECTIFIER .............................................................................................................
37
THREE PHASE TRANSFORMER RECTIFIER ........................................................... 26
TIGHTEN OR CLAMP............................................................................................... 182
TIME ........................................................................................................................ 6
TORCH .................................................................................................................... 186
TOUCH START (GTAW) ........................................................................................... 151a,b
TRANSFORMER ...................................................................................................... 23
TWO-STEP TRIGGER OPERATION (GMAW)............................................................ 148
TWO-STEP TRIGGER OPERATION (GTAW) ............................................................ 146
UNLOCKED.............................................................................................................. 207
UNTIGHTEN OR UNCLAMP ..................................................................................... 183
VARIABLE INDUCTANCE......................................................................................... 161
VENTILATION AND AIR CIRCULATING FAN ............................................................ 118
VOLTAGE ................................................................................................................ 2
VOLTAGE INPUT ..................................................................................................... 49
WATER (COOLANT) INPUT...................................................................................... 50
WATER (COOLANT) OUTPUT.................................................................................. 51
WAVE BALANCE...................................................................................................... 152
WELDING (GENERAL) ............................................................................................. 75
WIRE BURNBACK CONTROL................................................................................... 176
WIRE DIAMETER ..................................................................................................... 173
WIRE FEED ............................................................................................................. 166WIRE FEED FORWARD ........................................................................................... 167
WIRE FEED INTERMITTENT (STITCH)/INTERRUPTED............................................ 169
WIRE FEED REVERSE............................................................................................. 168
WIRE FEED SLOW RUN-IN...................................................................................... 172
WIRE FEED SPOOL GUN......................................................................................... 106
WIRE TYPE.............................................................................................................. 174
WORK CONNECTION .............................................................................................. 97
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Table 3 ― Numerical list of function, keyword, or phrase
Table 1Symbol No.
1 .................. AMPERAGE2 .................. VOLTAGE
3 .................. HERTZ
4 .................. FREQUENCY
5 .................. SECONDS
6 .................. TIME
7 .................. NEGATIVE
8 .................. POSITIVE
9 ..................DIRECT CURRENT (DC)
10................. ALTERNATING CURRENT (AC)
11................. ALTERNATING CURRENT (AC) AND DIRECT CURRENT (DC)
12................. EARTH (GROUND)
13................. PROTECTIVE EARTH (GROUND)
14................. FRAME OR CHASSIS
15................. FUSE
16................. INPUT PLUG AND CORD
17................. LINE CONNECTION
18................. AUXILIARY POWER
19................. CIRCUIT BREAKER
20................. RECEPTACLE RATING – AUXILIARY POWER
21................. SINGLE PHASE
22................. THREE PHASE
23................. TRANSFORMER
24................. SINGLE PHASE TRANSFORMER25................. SINGLE PHASE TRANSFORMER RECTIFIER
26................. THREE PHASE TRANSFORMER RECTIFIER
27................. GENERATOR
28................. DIRECT CURRENT GENERATOR WITH COMMUTATOR
29................. SINGLE PHASE ALTERNATOR
30................. THREE PHASE ALTERNATOR WITH RECTIFIER
31.... ............. THREE PHASE MOTOR THREE PHASE ALTERNATOR RECTIFIER
32................. MOTOR
33................. MOTOR GENERATOR
34.... ............ . SINGLE PHASE TRANSFORMER AC AND RECTIFIED DC POWER SOURCE
35................. INVERTER36.... ............. SINGLE PHASE STATIC FREQUENCY CONVERTER TRANSFORMER RECTIFIER
37.... ............ . THREE PHASE STATIC FREQUENCY CONVERTER TRANSFORMER RECTIFIER
38................. DC/AC CONVERTER
39................. DANGEROUS VOLTAGE
40.................SUITABLE FOR WELDING IN AN ENVIRONMENT WITH INCREASED RISK OFELECTRIC SHOCK
41................. CLASS II EQUIPMENT
42................. GAS SUPPLY
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Table 1Symbol No.
43................. GAS TYPE
44................. MATERIAL TYPE
45................. MATERIAL THICKNESS46................. DIAMETER mm (in)
47................. INPUT
48................. OUTPUT
49................. VOLTAGE INPUT
50................. WATER (COOLANT) INPUT
51................. WATER (COOLANT) OUTPUT
52................. GAS INPUT
53................. GAS OUTPUT
54................. OFF
55................. ON
56.... ............ . INCREASE/DECREASE OF QUANTITY (ROTATING; NUMBER OF POSITIONS)
57.... ............ . INCREASE/DECREASE OF QUANTITY (ROTATING; WITH OFF POSITION)
58................. INCREASE/DECREASE OF QUANTITY (ROTATING)
59.... ............ . INCREASE/DECREASE OF QUANTITY (LINEAR; NUMBER OF POSITIONS)
60................. INCREASE/DECREASE OF QUANTITY (LINEAR)
61................. DIRECTION OF CONTINUOUS ROTATION (CLOCKWISE)
62..... ............ DIRECTION OF CONTINUOUS ROTATION (COUNTER-CLOCKWISE)
63................. DO NOT SWITCH WHILE WELDING
64................. PANEL/LOCAL
65................. DIRECTIONAL ARROW
66................. REMOTE
67................. PUSHBUTTON SWITCH (IN)
68................. PUSHBUTTON SWITCH (OUT)69................. START OF ACTION
70................. STOP OF ACTION
71................. FOOT CONTROL
72................. MANUAL CONTROL
73a,b ............CAUTION
74a,b ............ READ OPERATOR'S MANUAL
75................. WELDING (GENERAL)
76................. SHIELDED METAL ARC WELDING (SMAW)
77................. MMA WELDING
78a,b ............ GAS METAL ARC WELDING (GMAW)
79a,b ............FLUX CORED ARC WELDING (FCAW)80a,b ............SUBMERGED ARC WELDING (SAW)
81a,b............ GAS TUNGSTEN ARC WELDING (GTAW)/TUNGSTEN INERT GAS (TIG)WELDING
82................. AIR CARBON ARC GOUGING
83................. PLASMA ARC CUTTING (PAC)
84................. PLASMA ARC WELDING (PAW)
85................. PLASMA ARC GOUGING (PAG)
86................. SPRAY TRANSFER
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Table 1Symbol No.
87................. SHORT CIRCUITING TRANSFER
88................. PULSE TRANSFER
89................. ARC SPOT WELDING90a,b ............ CONTINUOUS WELDING
91a,b ............INTERMITTENT (STITCH) WELDING
92a,b ............ GTAW SPOT WELDING
93................. GMAW SPOT WELDING
94................. CONSTANT CURRENT
95................. CONSTANT VOLTAGE OR CONSTANT POTENTIAL
96................. ELECTRODE CONNECTION
97................. WORK CONNECTION
98................. PLASMA TORCH CONNECTION AND NOZZLE (POSITIVE SUPPLY)
99................. PLASMA TORCH CONNECTION TO NEGATIVE ELECTRODE
100...............ELECTRODE POSITIVE
101............... ELECTRODE NEGATIVE
102............... SHIELDED METAL ARC (SMAW) ELECTRODE HOLDER
103a,b ..........GAS METAL ARC WELDING (GMAW) GUN
104............... SELF SHIELDED FLUX CORED ARC WELDING TORCH
105............... FLUX CORED ARC WELDING (FCAW) GUN
106............... WIRE FEED SPOOL GUN
107a,b ..........GAS TUNGSTEN ARC WELDING (GTAW) TORCH
108............... AIR CARBON ARC GOUGING ELECTRODE HOLDER
109...............PLASMA TORCH
110............... MOTORIZED GUN
111............... MOTORIZED GUN WITH FILLER WIRE SUPPLY
112............... SUBMERGED ARC TORCH113...............GMAW GUN SWITCH/CONTROL
114...............GTAW TORCH SWITCH/CONTROL
115............... FCAW GUN WITH SWITCH
116...............GMAW GUN WITH SWITCH
117............... GTAW TORCH WITH SWITCH
118............... VENTILATION AND AIR CIRCULATING FAN
119............... LIQUID
120...............COOLING
121............... COOLING WITH LIQUID
122...............COOLING PUMP
123............... TEMPERATURE INDICATION124............... DISTURBANCE
125............... AUTOMATIC CYCLE
126............... ONE CYCLE
127...............PROGRAM
128...............SAVE TO MEMORY
129...............RECALL FROM MEMORY
130............... DIGITAL DISPLAY
131...............CLOCK, TIME SWITCH
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Table 1Symbol No.
132...............PERCENT
133...............PROCESS CYCLE
134............... PERCENT ON TIME135...............PULSE
136...............PULSE BACKGROUND
137...............PULSE PEAK
138...............SOFT START
139a,b ..........HOT START
140............... SLOPE (INCREASING)
141...............SLOPE (DECREASING)
142...............ARC FORCE
143............... HIGH FREQUENCY (GENERAL)
144............... HIGH FREQUENCY ON – CONTINUOUS
145a,b ..........HIGH FREQUENCY ON – START ONLY
146............... TWO-STEP TRIGGER OPERATION (GTAW)
147............... FOUR-STEP TRIGGER OPERATION (GTAW)
148...............TWO-STEP TRIGGER OPERATION (GMAW)
150a,b ..........IMPULSE START (GTAW)
151a,b ..........TOUCH START (GTAW)
152............... WAVE BALANCE
153...............MAXIMUM CLEANING
154...............MAXIMUM PENETRATION
155...............PURGE BY GAS
156...............GAS POSTFLOW
157...............GAS POSTFLOW
158............... LOW INDUCTANCE159...............MEDIUM INDUCTANCE
160...............HIGH INDUCTANCE OR INDUCTANCE
161...............VARIABLE INDUCTANCE
162...............PLASMA GAS
163............... PLASMA SHIELDING GAS
164...............PILOT/PULSE STARTING
165............... PILOT ARC STARTING
166............... WIRE FEED
167............... WIRE FEED FORWARD
168............... WIRE FEED REVERSE
169............... WIRE FEED INTERMITTENT (STITCH)/INTERRUPTED170...............COLD JOG (INCH) TOWARD WORKPIECE
171...............COLD JOG (INCH) AWAY FROM WORKPIECE
172...............WIRE FEED SLOW RUN-IN
173............... WIRE DIAMETER
174............... WIRE TYPE
175............... MELTBACK (BURNBACK)
176...............WIRE BURNBACK CONTROL
177............... ARC IGNITION BY CONTACT
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Table 1Symbol No.
178............... AIR FLOW
179a,b ..........AIR PRESSURE
180a,b ..........HOPPER181............... ARC WELDING EQUIPMENT CARRIAGE
182............... TIGHTEN OR CLAMP
183...............UNTIGHTEN OR UNCLAMP
184...............BLOWING
185...............SUCTION
186...............TORCH
187............... OSCILLATION
188...............ENGINE OIL
189............... PULL TO STOP ENGINE
190...............ENGINE CHOKE
191...............FUEL
192...............ENGINE COOLANT
193...............ENGINE COOLANT TEMPERATURE
194...............BATTERY (ENGINE)
195a,b ..........AIR FILTER
196a,b,c .......ENGINE
197............... ENGINE RPM
198a,b ..........ENGINE STOP
199...............GLOW PLUG
200............... ENGINE START
201............... ELECTRIC MOTOR
202...............HOUR METER
203...............ELAPSED ENGINE HOURS204...............FUEL SHUTOFF
205...............SLOW
206...............FAST
207...............UNLOCKED
208............... LOCKED
6 How to combine graphic symbols
6.1 General
Follow the instructions in Clause 5 to determine what part is being described and how to select
an existing symbol for it if one exists. Always try to use the standard symbols in Table 1 exactlyas they are presented. If they do not satisfy the need, then develop a combination or compositesymbol using standard symbols as described in 6.2.
A combination or composite symbol is one that is made up of one or more symbols. Compositesymbols are useful when standard symbols do not provide enough information to communicatethe desired information. There are some composite symbols that are listed in Clause 5. Thesesymbols are used often and should be used in new applications whenever possible. Theexamples in 6.2 show how to develop composite symbols when a new symbol is required.
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6.2 Procedure to combine symbols
The procedure to combine symbols is shown by way of the example below.
EXAMPLE 1 Assume a symbol is needed to explain that a given receptacle is used for connecting a Remote Amperage Control to the power source. First , li st the connec tion to be exp lained in ful l and then break into par ts, as
follows:REMOTE AMPERAGE CONTROL
Key words: Remote, Amperage Control
Use the standard symbol for each key word from Table 1, i.e., symbols 1 and 68.
Amperage (Control ):
Remote:
Combine the standard symbols to produce the composite.
Remote Amperage Control (Connection Point or Function):
The example above shows a composite symbol being formed from two standard symbols. Thefollowing examples are of a composite symbol formed from three standard symbols.
EXAMPLE 2 Remote Amperage and Voltage Control
Key Words: Remote, Amperage Control, Voltage Control
Apply the standard symbol from Tabl e 1 for each key word, i.e., symbol s 1 , 2 and 68.
Remote:
Amperage (Control ):
Voltage (Control):
Combine the symbols to form the composite symbol.
Remote Amperage and Voltage Control (Connection Point or Function):
EXAMPLE 3 High Frequency SwitchKey Words: High Frequency, Switch (with ON and OFF positions)
High Frequency:
ON
OFF
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The composite symbol is then:
The examples that follow use the same basic principles as in the above examples, but usedifferent symbols for different purposes.
EXAMPLE 4 This grouping of symbols shows Initial Current and Weld Current for use with controls for separatefunctions during parts of a weld cycle. To create the symbol for Initial Current, use symbols 1 and 133 from Table 1 andproceed as follows.
Amperage (un its o f measure for current) :
Process Cycle:
The two combined symbols along with a thickened portion of the process cycle mean Initial Current, shown as follows:
The Initial Current segment of the process cycle symbol is approximately 3 to 4 times as thick as the other segments toshow clearly the portion being emphasized. The symbol for Weld Current is created in the same way as shown below.
Amperage:
Weld Process Cycle.
The two combined symbols along with a thickened portion of the Process Cycle mean Weld Current, shown as follows:
OR
This example also used symbols 1 and 133 from Table 1. The exact location of "A" in relation to the thickened portioncan be moved slightly to accommodate nameplate space as shown. The emphasized portion again is appropriatelythickened to indicate clearly the selected segment of the process cycle.
EXAMPLE 5 This grouping shows Peak (High) Pulse Time and Background (Low) Pulse Current for use withpulsing controls. Using symbols 6 and 135 from Table 1, proceed as follows to create the symbol for Peak (High) PulseTime.
Time:
Pulse (Pulsing):
AA
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The two combined symbols along with a thickened portion of the pulse mean Peak (High) Pulse Time, shown as follows:
The top segment of the pulse symbol is widened to approximately 3 to 4 times the thickness of the other segments to
show clearly the portion being emphasized.
EXAMPLE 6 The symbol for Background (Low) Pulse Current is created in the same way as in the example above.
Amperage:
Pulse:
The two symbols along with a thickened portion of the pulse mean Background (Low) Pulse Current, shown as follows:
This example uses symbols number 1 and 135 from Table 1. The emphasized portion again is appropriately widened toindicate clearly the selected segment of the pulse.
The example below follows the same method used in the previous examples, but for a differentpurpose.
EXAMPLE 7 This example shows Fast Pulse Frequency for use on the positions of a pulse time range switch. Tocreate the proper symbol, proceed as follows.
Pulse (Pulsing), symbol 135:
Slow Pulse:
By suitably modifying symbol 135 from Table 1, the two symbols above now represent fast and slow pulsing. Notice theconsistent line weights, heights, and total length of both symbols. Use this procedure and apply these considerationswhen creating new symbols.
The two symbols work well when used as Fast Pulse and Slow Pulse positions of a Pulse Tune Range Switch, shownas follows:
6.3 Summary
Creating composite symbols is not difficult. It requires only simple care and precision. Alwaysproceed according to the standard method shown in the example in 6.2 using the followingguidelines:
a) write down the name for the connection or control;
b) identify the keywords;
c) find the standard symbol in Table 1 for each keyword;
t
A
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d) combine the standard symbols according to examples in 6.2;
e) locate symbols with controls and connection points according to examples in 6.2;
f) pay attention to line weight, height, width and position of each symbol;
g) be consistent in application and always use approved symbols from Table 1 for composites
whenever possible.
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Annex A(informative)
Examples of Grouping of Symbols
NOTE The examples in this Annex show groupings of symbols with and without supplementary text.
A.1 Input voltage/power switch
Figure A.1 ― Input Voltage/Power Switch
A.2 Use of remote receptacles and selector switches
Figure A.2 ― Use of remote receptacles and selector switches
v INPUT VOLTAGE / POWER
ON
OFF
REMOTE
PANEL
REMOTECURRENTCONTROLA
PANEL
REMOTE
RECEPTACLE SWITCH SWITCH
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A.3 Weld start and stop push buttons
Figure A.3 ― Weld start and stop push buttons
A.4 Panel indicator lights
Figure A.4 ― Panel indicator lights
START
STOPSTOP
PUSHBUTTON
STARTPUSHBUTTON
HIGH FREQUENCY ON
OUTPUT VOLTAGE / POWER ON
DISTURBANCE (OVERLOAD, MALFUNCTION, FAULT, ETC.)
TEMPERATURE LIMIT REACHED
HF
V
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A.5 Output (contactor) switch
Figure A.5 ― Output (contactor) switch
A.6 Arc force control potentiometer
Figure A.6 ― Arc force control potentiometer
ARC FORCE
VOUTPUT
VOLTAGE
REMOTEOUTPUT VOLTAGESWITCHED REMOTELY
ONOUTPUT VOLTAGEALWAYS ON
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A.7 Terminals and selector switch on AC/DC welder
Figure A.7 ― Terminals and selector switch on AC/DC welder
A.8 Process switch (SMAW-GTAW-GMAW)
Figure A.8 ― Process switch (SMAW-GTAW-GMAW)
AC
ELECTRODEPOSITIVE
ELECTRODENEGATIVE
DO NOT SWITCH UNDER LOAD
ELECTRODECONNECTION
WORKCONNECTION
OUTPUTTERMINALS
GMAW
GTAW
SMAW
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A.9 Ignition switch on engine driven welder
Figure A.9 ― Ignition switch on engine driven welder
A.10 Idle switch
Figure A.10 ― Idle switch
OFF
ON
ENGINE
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A.11 Start/run switch
Figure A.11 ― Start/run switch
A.12 Process selection for GMAW
Figure A.12 ― Process selection for GMAW
SHORTCIRCUIT
TRANSFER
PULSETRANSFER
SPRAY TRANSFER
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A.13 Control potentiometers for GMAW
Figure A.13 ― Control potentiometers for GMAW
A.14 Switched settings for GMAW
Figure A.14 ― Switched settings for GMAW
VOLTAGE
V
VARIABLE INDUCTANCE
VOLTAGE
VINDUCTANCE
MEDIUM
LOW HIGH
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A.15 Setting pulsing parameters using digital display
Figure A.15 ― Multi-function switches with digital display
A.16 Setting pulsed GMAW parameters with digital display
Figure A.16 ― Setting pulsed GMAW parameters with digital display
AAPEAK
CURRENTBACKGROUND
CURRENT
PERCENT ON TIME
PULSEFREQUENCY
DECREASE
INCREASE
DIGITALDISPLAY
PEAKVOLTAGE
BACKGROUNDVOLTAGE
PEAK PULSE TIME
PULSEFREQUENCY
DECREASE
INCREASE
DIGITALDISPLAY
t
VV
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A.17 AC balance control with balanced position used for the SMAW process
Figure A.17 ― AC balance control with balanced position used for the SMAW process
+−
ACBALANCE
MAXIMUMCLEANING
MAXIMUM
PENETRATION