Miller Electric HF-251D-1 Welding Processes Requiring High Frequency, Incorrect Installation

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SECTION 7 − HIGH FREQUENCY

7-1. Welding Processes Requiring High Frequency

Work

TIG

1 High-Frequency Voltage

TIG − helps arc jump air gap between torch and workpiece and/ or stabilize the arc.

high_freq 12/96 − S-0693

7-2. Incorrect Installation

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

13	2

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

S-0694

OM-611 Page 22

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Image 26

Contents Description OM-611Processes From Miller to You Table of Contents Page Arc Welding Hazards Symbol UsageMarks a special safety message Electric Shock can killFlying Metal can injure eyes ARC Rays can burn eyes and skinWelding can cause fire or explosion Buildup of GAS can injure or killCalifornia Proposition 65 Warnings About Pacemakers Principal Safety StandardsEMF Information Identifie un message de sécurité particulier − Consignes DE Sécurité − À Lire Avant UtilisationLES Pièces Chaudes peuvent cau- ser des brûlures graves LE Soudage peut causer un incen- die ou une explosionLES Particules Projetées peu- vent blesser les yeux LE Bruit peut affecter l’ouïe’EMPLOI Excessif peut Faire Risque D’INCENDIE OU D’EXPLOLA Chute DE L’APPAREIL peut blesser LES Pièces Mobiles peuvent cau- ser des blessuresConsignes relatives aux stimulateurs cardiaques Principales normes de sécuritéInformation sur les champs électromagnétiques Typical Process Connections − InstallationSpecifications Installing Gas Supply IN-GAS-OUTPower Source Plug Information And Connections Amperage ControlSocket Operator Control Receptacle Information And ConnectionsOperator Control Receptacle Socket Information Connecting To Weld Output Terminals Electrode Electrode OUT Work INPUT/OUTPUTConnecting Input Power − Operation High Frequency SwitchHigh Frequency Selector Switch ControlsHigh Frequency Intensity Control Power Switch And Pilot LightPostflow Timer Shielding Gas− Maintenance & Troubleshooting Routine Maintenance MonthsAdjusting Spark Gaps Troubleshooting Trouble Remedy− Electrical Diagrams Circuit Diagram For 115 Volts ModelCircuit Diagram For 230 Volts Model Welding Processes Requiring High Frequency Incorrect Installation− High Frequency Weld ZoneMetal Building Requirements Correct InstallationMetal Building Amperage Range Gas Type Polarity AC − Argon AC − Argon −Positioning The Torch − Guidelines for TIG Welding GtawPreparing Tungsten Electrode For Welding Preparing Tungsten For Conventional AC WeldingTungsten Without Filler Rod Torch Movement During WeldingPositioning Torch Tungsten For Various Weld Joints Tungsten With Filler RodReturn To Table Of Contents − Parts List Complete Assembly Part 1 of 2 115V ModelComplete Assembly Part 1 Complete Assembly Part 2 of 2 115V Model Complete Assembly Part 2 Page Page Page Service SupportOwner’s Record Miller Electric Mfg. Co