Hobart OM-303 Welding Processes Requiring High Frequency, Incorrect Installation, Weld Zone

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SECTION 8 – HIGH FREQUENCY

8-1. Welding Processes Requiring High Frequency

Work

TIG

1 High-Frequency Voltage

Helps arc jump air gap between torch and workpiece and/or

1stabilize the arc.

high_freq1 11/96 – S-0693

8-2. Incorrect Installation

	Weld Zone
	11, 12
50 ft
(15 m)
	10
9	14
8

13	2

S-0694

Sources of Direct High-Frequency Radiation

1High-Frequency Source (welding power source with built-in HF or separate HF unit)

2Weld Cables

3Torch

4Work Clamp

5Workpiece

6Work Table

Sources of Conduction of High		Sources of Reradiation of High
Frequency		Frequency
7	Input Power Cable	10	Ungrounded Metal Objects
8	Line Disconnect Device	11	Lighting
9	Input Supply Wiring	12	Wiring
		13	Water Pipes and Fixtures
		14	External Phone and Power Lines

OM-303 Page 20

Image 24

Contents OM-303155795N DescriptionProcesses From Hobart to You Table of Contents Page Symbol Usage Marks a special safety messageArc Welding Hazards Electric Shock can killARC Rays can burn eyes and skin Welding can cause fire or explosionFlying Metal can injure eyes Buildup of GAS can injure or killPrincipal Safety Standards EMF Information About PacemakersSignification des symboles Consignes DE Securite Lire Avant UtilisationUN Choc É Lectrique peut tuer LES Fumé ES ET LES GAZ peuvent ê tre dangereuxLE Soudage peut provoquer un incendie ou une explosion DES Particules Volantes peuvent blesser les yeuxLE Bruit peut affecter l’ouïe Risque D’INCENDIE OU LA Chute DE L’APPAREIL peut blesser’EMPLOI Excessif peut DES Organes Mobiles peuvent provoquer des blessuresPrincipales normes de sé curité Information sur les champs é lectromagné tiquesConsignes relatives aux stimulateurs cardiaques General Precautionary Label DefinitionsSymbols And Definitions IntroductionIncluded with Your Unit Specifications Duty Cycle ChartVolt-Ampere Curves Hertz ModelsInstallation Turn Off power before mak- ing connectionsSelecting a Location Typical Stick ConnectionsTypical TIG Connections Electrical Service Guide Connecting Input PowerOperation ControlsExample of Front Panel Amperage Control Example of Remote Amperage ControlGtaw Welding Amperage Range AC Low AC HighProcess and Material Thickness Guide Label Maintenance and Troubleshooting Routine MaintenanceTroubleshooting Electrical Diagrams Circuit DiagramIncorrect Installation High FrequencyWelding Processes Requiring High Frequency Weld ZoneCorrect Installation Metal BuildingMetal Building Requirements Parts List Main AssemblyDia Part Description Mkgs Quantity Figure -1. Main Assembly Page Page Service SupportContact your Distributor for Hobart Welding Products