Document type : Publicly available specification
Document subtype :
Document stage : Working draft
Document language : E
ISO/TC 44 - IEC/TC 26 JWG2 N48
March 2001
ISO/IEC JOINT WORKING GROUP 2 (JWG2)
Terms and Symbols
Draft IEC 60974-9
Arc welding equipment – Part 9 : Graphical symbols for arc welding equipment
Matériel de soudage à l’arc – Partie 9 : Symboles graphiques pour le matériel de soudage électrique à l’arc
Draft IEC 60974-9
1
Contents
1 Scope .................................................................................................................................................. 2
2 Normative reference .......................................................................................................................... 2
3 Terms and definitions ....................................................................................................................... 2
4 Use of symbols .................................................................................................................................. 2 4.1 General ................................................................................................................................................ 2 4.2 Selection of symbols ............................................................................................................................ 2 4.3 Size of symbols.................................................................................................................................... 3 4.4 Use of color.......................................................................................................................................... 3
5 Symbols .............................................................................................................................................. 3 5.1 Letters .................................................................................................................................................. 3 5.2 Graphic symbols .................................................................................................................................. 4 5.2.1 Symbols to describe the switch or control ........................................................................................... 4 5.2.2 Symbols to indicate switch or control position ..................................................................................... 5 5.2.3 Symbols to indicate switch or control function..................................................................................... 6 5.2.4 Symbols to indicate electrical connection............................................................................................ 8 5.2.5 Symbols to indicate fluid connection or control ................................................................................. 11 5.2.6 Symbols to indicate auxiliary device, connection or function ............................................................ 12 5.2.7 Symbols to indicate control of the welding amperage/voltage .......................................................... 13 5.2.8 Symbols to indicate type of torch....................................................................................................... 14 5.2.9 Symbols to indicate processes .......................................................................................................... 16 5.2.10 Symbols to indicate control of welding characteristics ...................................................................... 17 5.2.11 Symbols to describe the type of power source.................................................................................. 19 5.2.12 Symbols to indicate protective component and class of protection................................................... 20 5.2.13 Symbols to inform users .................................................................................................................... 21
Annexe A (informative) Examples of combinations of symbols.................................................................. 23
Annexe B (informative) Examples of control panel....................................................................................... 25
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Arc welding equipment – Part 9 : Graphical symbols for arc welding equipment
1 Scope
This Publicly Available Specification contains graphic symbols for arc welding and allied processes equipment to identify controls, indicators, connection points, functions, and to select processes.
The symbols are for use on panel, rating plate and any documentation for arc welding and allied processes equipment.
This Publicly Available Specification does not cover graphic symbols used to alert personnel of immediate or potential personal hazards in the use of the equipment.
Note 1 – For safety symbols see ISO 3864. Note 2 – For installation instructions see IEC 62081 and IEC 62079
2 Normative reference
The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards.
IEC 60050(851) International Electrotechnical Vocabulary (IEV) – Chapter 151 : Electric welding
IEC 60417 Graphical symbols for use on equipment - Index, survey and compilation of the single sheets
IEC 60974-1 Safety requirements for arc welding equipment - Part 1: Welding power sources
ISO 7000 Graphical symbols for use on equipment – Index and synopsis
3 Terms and definitions
The definitions in IEC 60974-1 and IEC 60050(851) shall apply.
4 Use of symbols
4.1 General
Symbols shall be placed on equipment to instruct use and operation. Examples of control panel are given in Annex B.
4.2 Selection of symbols
Symbols specified in clause 5 shall be used either as a single item or in combination to fit the intended application. Examples of combinations are given in Annex A.
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4.3 Size of symbols
For the application of these symbols it may be necessary either to reduce or to enlarge the original to a suitable size. In the case of symbols composed of several graphic elements, or when reducing to minimum height, check that clear identification is still possible and legibility is adequate. Consider available light, user distance, and possible operating conditions as factors during size selection also.
Recommended minimum symbol size is 6 mm square.
4.4 Use of color
In general, the graphic form of a symbol reproduced in black on white or white on black should be sufficient for its identification.
For the purposes of these symbols, adequate contrast between symbol and background is 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 are designated as safety-alerting colors.
5 Symbols
This clause presents the symbols along with its reference number, function keyword or phrase, application and source.
5.1 Letter symbols
Table 1 gives a list of letters, which may be used in a symbol.
Table 1 — Letters used as symbols
Function, keyword or phrase Letter Unit
Amperage I A
Conventional welding current I2 A
Conventional welding voltage U2 V
Diameter ∅ mm
Duty cycle ; Duty factor X %
Frequency f Hz
Power P W
Power consumption P1 W
Rated no load current I0 A
Rated no load voltage U0 V
Rated supply current I1 A
Rated supply voltage U1 V
Speed of rotation n min-1
Temperature T °C
Time t s, min,h
Voltage U V
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5.2 Graphical symbols
5.2.1 Symbols to describe the switch or control
N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
1 IEC 60417 - 5004
Variability
Variabilité
Verändern einer Grösse
To signify an increase/decrease of a quantity continuously
NOTE : Symbol may be curved
2
Variability by coarse steps
Réglage par gradins grossiers
Grobstufe
To signify an increase/decrease of a parameter by coarse steps
NOTE : Symbol may be curved
3
Variability by fine step
Réglage par gradins fins
Feinstufe
To signify an increase/decrease of a parameter by fine steps
NOTE : Symbol may be curved
4
4 cycles control mode
Mode de commande à 4 temps
4 Takt System
To signify the function of the torch switch. Push and release to
start, push and release to stop
5
2 cycles control mode
Mode de commande à 2 temps
2 Takt System
To signify the function of the torch switch. Push to start and
release to stop
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5.2.2 Symbols to indicate switch or control position
N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
6 IEC 60417 - 5007
On (power)
Marche (mise sous tension)
Ein (unter Spannung setzen)
To indicate connection to the mains, at least for mains
switches or their positions, and all those cases where safety is
involved.
7 IEC 60417 - 5008
Off (power)
Arrêt (mise hors tension)
Aus (ausser Spannung setzen)
To indicate disconnection from the mains, at least for mains
switches or their positions, and all those cases where safety is
involved.
8 IEC 60417 - 5268
IN-position of a bistable push control
Position enfoncée d'un bouton-poussoir à deux positions stables
Gedrückte Stellung eines bistabilen Druckschalters
To signify the IN-position of a push control where the push control is used to energize or
deenergize a function.
NOTE : To be used together with a function symbol
9 IEC 60417 - 5269
OUT-position of a bistable push control
Position sortie d'un bouton-poussoir à deux positions stables
Ungedrückte Stellung eines bistabilen Druckschalters
To signify the OUT-position of a push control where the push control is used to energize or
deenergize a function.
NOTE : To be used together with a function symbol
10 IEC 60417 - 5569
Locked
Fermé
Verriegelt
To signify a locked function or control
NOTE : To be used together with a function symbol
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N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
11 IEC 60417 - 5570
Unlocked
Ouvert
Entriegelt
To signify an unlocked function or control
NOTE : To be used together with a function symbol
12
Slow
Lent
Langsam
To signify slow action or operation
13
Fast
Rapide
Schnell
To signify fast action or operation
5.2.3 Symbols to indicate switch or control function
N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
14
Continuous welding
Soudage continu
Durchgehendes Schweiβen
To signify a continuous welding
15
Intermittent (stitch) welding
Soudage avec cordon discontinu
Unterbrochenes Schweißen
To signify an intermittent (stitch) welding
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N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
16 ISO 7000 - 0468
modified
Arc spot welding
Soudage par point à l’arc
Lichtbogen-Punkt Schweißen
To signify an arc spot welding
17
Manual control
Commande manuelle
Handbetätigung
To signify the switch position for manual control
18
Arc striking without contact
Amorçage de l’arc sans contact
Berührungslose Zündung
To signify a TIG arc striking function which initiates an arc
without contact
19
Arc striking with contact
Amorçage de l’arc au contact
Berührungszündung
To signify a TIG arc striking function which initiates an arc
with contact
20
Pilot arc starting
Amorçage de l’arc pilote
Zündung des Pilotlichtbogens
To signify pilot arc starting of a plasma torch
21 ISO 7000 - 0474
Purging of air (by gaz)
Purge de l’air (par gaz)
Mit Schutzgas spülen
To signify purging of the air by gas
22 ISO 7000 - 0823
Wire feed drive
Déroulement du fil
Drahtvorschub
To signify a wire feeder or wire feed control
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N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
23
Wire burnback control
Contrôle de remontée de fil
Regeln des Drahtrückbrandes
To signify burnback control at the end of the weld
24 ISO 7000 - 0004
Direction of continuous rotation (clockwise)
Sens de mouvement continu de rotation (aiguille d’une montre)
Drehbewegung (im Uhrzeigersinn)
to signify a direction of continuous rotation
25
Direction of continuous rotation (anti clockwise)
Sens de mouvement continu de rotation (inverse de l’aiguille d’une montre)
Drehbewegung (entgegen dem Uhrzeigersinn)
to signify a direction of continuous rotation
5.2.4 Symbols to indicate electrical connection
N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
26 IEC 60417 - 5005
Plus ; positive polarity
Plus ; Pôle positif
Positive Polarität
To signify positive polarity
27 IEC 60417 - 5006
Minus ; Negative polarity
Moins ; Pôle négatif
Negative Polarität
To signify negative polarity
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N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
28 IEC 60417 - 5017
Earth (ground)
Terre
Erde
To signify the earth (ground) connection
Note : not for a protective earth connection
29 IEC 60417 - 5019
Protective earth (ground)
Terre de protection
Schutzerde
To signify the equipment connection point for the protective earth (ground)
30 IEC 60417 - 5020
Frame or chassis
Masse, châssis
Masse, Chassis, Körper
To signify the frame or chassis connection
Note : not for a protective earth connection
31 IEC 60974-1
Input supply
Alimentation
Netzanschluss
To signify the input supply
32 ISO 7000 - 0453
Workpiece connection
Borne pour conducteur de retour
Werkstückanschluß
To signify a work piece connection
33 ISO 7000 - 0483
Connection to the nozzle of a plasma torch (positive supply)
Connexion pour la buse de la torche plasma (pôle positif)
Anschluß zur Düse eines Plasmabrenners (Pluspol)
To signify a plasma torch connection - nozzle connection to
positive supply
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N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
34 ISO 7000 - 0482
Connection to the electrode of a plasma torch (negative supply)
Connexion pour l’électrode de la torche plasma (pôle négatif)
Anschluß zur Elektrode eines Plasmabrenners (Minuspol)
To signify a plasma torch connection - electrode
connection to negative supply
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5.2.5 Symbols to indicate fluid connection or control
N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
35
Air flow
Courant d'air
Luftstrom
To indicate air flow
36 ISO 7000 - 0536
Liquid
Liquide
Flüssigkeit
Liquid eg. coolant
37
Gas supply
Alimentation en gaz
Gas Versorgung
To signify a gas supply connection or control
38 ISO 7000 - 0481
Plasma shielding gas
Gaz de protection du soudage plasma
Plasmaschutzgas
To signify plasma shielding gas connection or control
39 ISO 7000 - 0480
Plasma gas
Gaz plasmagène
Plasmagas
To signify plasma gas connection or control
40
Air pressure
Pression d'air
Luftdruck
To signify air pressure function or control
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5.2.6 Symbols to indicate auxiliary device, connection or function
N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
41 IEC 60417 - 5034
Input
Entrée
Eingang
To signify input connection or control
42 IEC 60417 - 5035
Output
Sortie
Ausgang
To signify output connection or control
43 ISO 7000 - 0093
Remote
Commande à distance
Fernbedienung
To signify a remote control, connection or function
44
Foot control
Commande par pédale
Fussbetätigung
To signify a foot control device, connection or function
45
Panel / Local
Commande locale
Lokal
To signify a panel / local function or control
46 ISO 7000 – 0466
modified
Hopper (powder, flux)
Réservoir (à poudre, à flux)
Schweißpulver - Ausstreutrichter
To signify a flux (powder) hopper
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N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
47 ISO 7000 - 0027
Cooling
Refroidissement
Kühlung
To signify cooling device, connection or control
48 ISO 7000 - 0089
Ventilating or air circulating fan
Ventilation d’aération
Lüfter
To signify a ventilating or air circulating fan
49
Air filter
Filtre à air
Luftfilter
To signify an air filter
5.2.7 Symbols to indicate control of the welding amperage/voltage
N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
50
Process cycle
Cycle
Prozessablauf
To signify one complete process cycle
51
Basic wave balance
Balance de l’onde de base
Balance
To signify an AC wave balance function or control. The amplitude or duration of the half cycle may be varied to show the function of
a control.
52
Pulse background
Valeur de base
Puls-Grundstrom
To indicate a control of pulse backgroung
NOTE : control is identified by one letter chosen in table 1
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N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
53
Pulse peak
Valeur de pic
Pulsstrom
To indicate a control of pulse peak
NOTE : control is identified by one letter chosen in table 1
54
Hot start
Départ suractivé
Hot Start
To indicate a control or function increasing the energy at the
beginning of the weld
NOTE : control is identified by one letter chosen in table 1
55
Slope (increasing)
Pente (montante)
Anstieg
To indicate a control or function regulating the increase of a
value.
NOTE : control is identified by one letter chosen in table 1
56
Slope (decreasing)
Pente (descendante)
Abfall
To indicate a control or function regulating the decrease of a
value.
NOTE : control is identified by one letter chosen in table 1
5.2.8 Symbols to indicate type of torch
N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
57 ISO 7000 – 0463
modified
Manual metal arc welding electrode holder
Porte électrode pour soudage manuel
Stabelektrodenhalter
To signify an electrode holder
58
Air carbon arc gouging electrode holder
Porte électrode pour gougeage à l’arc
Stabelektrodenhalter zum Druckluftfugen
To signify an air carbon arc gouging electrode holder
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N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
59 ISO 7000 - 0464
modified
MIG/MAG Torch
Torche MIG/MAG
Metall-Inertgas-Schweißbrenner Metall-Aktivgas-Schweißbrenner
To signify a MIG/MAG torch
60
Self shielded flux cored arc welding torch
Torche de soudage avec fil fourré sans gaz
Brenner für Fülldrahtschweißen
To signify a self shielded flux cored arc welding torch without
gas shielding
61 ISO 7000 - 0465
modified
TIG Torch
Torche TIG
Wolfram-Inertgas-Schweißbrenner
To signify a TIG torch
62 ISO 7000 - 0477
modified
Plasma torch
Torche pour procédé plasma
Plasmabrenner
To signify plasma torch for welding, cutting and/or gouging
63
Motorised gun
Pistolet avec système d’entraînement incorporé
Motorbrenner
To signify a gun incorporating a wire drive system
64
Motorised gun with filler wire supply
Pistolet avec dévidoir incorporé
Motorbrenner mit Drahtversorgung
To signify a gun incorporating a wire drive system and including a
filler wire supply
65
Submerged arc torch
Pistolet pour soudage à l’arc sous flux en poudre
Brenner für Unterpulverschweißen
To signify a torch for submerged arc welding
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5.2.9 Symbols to indicate processes
N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
66 ISO 7000 - 0460
modified
MMA welding
Soudage à l'électrode enrobée
Stabelektrodenschweißen
To signify MMA welding
67
Air carbon arc gouging
Gougeage arc-air
Drucktluftfugen
To signify air carbon arc gouging
68 ISO 7000 - 0461
modified
MIG/MAG welding
Soudage MIG/MAG
Metall-Inertgas-Schweißen Metall-Aktivgas-Schweißen
To signify MIG/MAG welding
69
Flux cored self shielded arc welding
Soudage avec fil fourré sans gaz
Fülldrahtschweißen
To signify flux cored self shielded arc welding (without gas
shielding)
70 ISO 7000 - 0462
modified
TIG welding
Soudage TIG
Wolfram-Inertgas-Schweißbrenner
To signify TIG welding
71 ISO 7000 - 0478
Plasma welding
Soudage au plasma
Plasmaschweißen
To signify plasma arc welding
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N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
72 ISO 7000 - 0479
Plasma cutting
Coupage au plasma
Plasmaschneiden
To signify plasma arc cutting
73
Plasma gouging
Gougeage plasma
Plasmafugen
To signify plasma gouging
74 ISO 7000 – 0467
modified
Submerged arc welding
Soudage à l’arc sous flux en poudre
Unterpulverschweißen
To signify submerged arc welding
5.2.10 Symbols to indicate control of welding characteristics
N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
75 ISO 7000 - 0455
Flat characteristic
Caractéristique externe statique plate
Konstantspannungs- Kennlinie
To signify a substantially constant voltage characteristic
76 ISO 7000 - 0454
modified
Drooping characteristic
Caractéristique externe statique plongeante
Fallende Kennlinie
To signify a substantially constant current characteristic
77
Arc force
Surintensité au court-circuit
Dynamik
To indicate a control or function increasing current when low arc
voltage is detected
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N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
78
Pulsed
Pulsé
Pulsen
To signify a pulse value
79
Variable inductance
Inductance variable
Verstellbare Induktivität
To signify a variable inductance function or control
80
High inductance or inductance
Inductance élevée ou inductance
Groβe Induktivität
To signify inductance or used with other inductance symbols,
high inductance
81
Medium inductance
Inductance moyenne
Mittlere Induktivität
To signify medium inductance connection, function or control
82
Low inductance
Inductance faible
Kleine Induktivität
To signify low inductance connection, function or control
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5.2.11 Symbols to describe the type of power source
N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
83 IEC 60417 - 5031
Direct current (DC)
Courant unidirectionnel (DC)
Gleichstrom (DC)
To signify that power source delivers direct current
84 IEC 60417 - 5032
Alternating current (AC)
Courant alternatif (AC)
Wechselstrom (AC)
To signify that power source delivers alternating current
NOTE : Symbol may be mixed with a number to indicate the
number of phase
85 IEC 60417 - 5033
direct and alternating current
Courant continu et alternatif
Gleichstrom und Wechselstrom
To signify that power source delivers both direct and
alternating current
86 IEC 60417 - 5156
Transformer
Transformateur
Transformator
To identify a transformer
87 IEC 60974-1 Rectifier
Redresseur
Gleichrichter
To identify a rectifying function
88 IEC 60974-1
G
Generator
Génératrice
Generator
To identify a generator
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N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
89 IEC 60974-1
Engine
Moteur thermique
Verbrennungsmotor
To identify an engine
90 IEC 60974-1
M
Electric motor
Moteur électrique
Elektromotor
To identify an electric motor
91 IEC 60974-1
Inverter
Onduleur
Inverter
To identify a frequency conversion stage function
5.2.12 Symbols to indicate protective component and class of protection
N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
92 IEC 60974-1
S
Suitable for welding in an environment with increased hazard of electric shock
Convient au soudage dans un environnement avec risque accru de choc électrique
Geeignet zum Schweiβen unter erhöhter elektrischer Gefährdung
To signify a welding power source suitable for weld in an environment with increased
hazard of electric shock
93 IEC 60417 - 5172
Class II equipment
Matériel de la classe II
Schutzklasse II
To signify protection class II equipment
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N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
94 IEC 60417 - 5016
Fuse
Fusible
Sicherung
To indicate a fuse
5.2.13 Symbols to inform users
N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
95 IEC 60417 - 5036
Dangerous voltage
Tension dangereuse
Gefährliche Spannung
To signify a dangerous voltage
96 ISO 7000 – 0228
Disturbance
Perturbation
Störung
To signify a disturbance of the correct operation
97 ISO 7000 – 0434
Caution
Attention
Achtung
To make operator aware of general hazard.
98
Read instruction manual
Lire le manuel d’instructions
Betriebsanleitung lesen
To signify that the instruction manual should be read
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N° SOURCE SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
99
Temperature indication
Information sur la température
Temperaturanzeige
To signify the temperature indication e.g. overtemperature
light
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Annex A
(informative) Examples of combinations of symbols
This annex gives examples of combination of symbols which can be used on arc welding and allied processes equipment.
SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
IEC 60417 - 5010
On/off (push-push)
Marche-arrêt (deux positions stables)
Ein/Aus Drucktaster
To indicate connection to or disconnection from the mains, at least for mains switches or their
position, and all those cases where safety is involved. Each position, ON or OFF, is a stable
position.
Input of liquid
Entrée de liquide
Rücklauf
To signify input of liquid
3~
Three-phase transformer-rectifier
Transformateur-redresseur triphasé
Dreiphasiger Gleichrichter
To indicate welding power source symbol on the rating plate
3
Inverter power source AC/DC
Source de courant de technologie onduleur délivrant un courant AC/DC
Dreiphasige Inverterstromquelle AC/DC
To indicate welding power source symbol on the rating plate
Slow wire feed start
Amorçage avec avance fil en vitesse lente
Langsamer Drahteinlauf
To signify the slow advanced of wire towards the workpiece at the
start of the weld
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SYMBOL FUNCTION, KEYWORD OR PHRASE
APPLICATION
Caution ! Read the instruction manual
Attention ! Lire le manuel d’instructions
Achtung ! Bedienungsanleitung lesen
To indicate a hazard and signify that the instruction manual
should be read
ISO 7000 - 0544
Cooling water
Eau de refroidissement
Kühlwasser
Variability and OFF position
Variabilité et mise hors tension
Verândern einer Grösse und ausser Spannung setzen
To signify an increase/decrease of quantity continuously and an
off position of a control
ISO 7000 - 469 modified
MIG/MAG spot welding
Soudage MIG/MAG par point
MIG/MAG Punktschweißen
To signify MIG/MAG spot welding
t
Upslope time
Temps de montée
Anstiegszeit
To indicate a control of upslope time
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Annex B
(informative) Examples of control panel
This annex gives examples of control panel for arc welding and allied processes equipment.
V
Figure B.1 - input voltage power switch Figure B.2 – arc force control potentiometer
A
Figure B.3 – remote receptacle and selector switches
Figure B.4 – terminals with inductance selector for MIG/MAG welding
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Figure B.5 – process switch (MMA, TIG, MIG) Figure B.6 – selector switch on AC/DC equipment
HF V
Figure B.7 – panel indicator lights (overheat, fault, arc striking, output voltage)
f
%
V
A
Figure B.8 – setting pulsing parameters using digital display