Miller Electric HF-251D-1 manual High Frequency Intensity Control, Power Switch And Pilot Light

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4-4. High Frequency Intensity Control

1 High Frequency Intensity

	Control
1	Use control to change amount of
	Use control to change amount of
	HF energy used to start and/or
	maintain the arc. Set as low as
	practical to prevent interfering with
	electronic equipment.

4-5. Power Switch And Pilot Light

1 Power Switch

Use switch to turn unit On and Off.

	1	2 Pilot Light
	1	2
		2

4-6. Postflow Timer

Postflow Timer

A fixed 15 second Postflow Timer

t 2controls the period of time shielding gas flows after the arc is extin- guished.

4-7. Shielding Gas

		1	Shielding Gas Cylinder
		2	Valve
		3	Hand Control
		4	Foot Control
		Open valve on cylinder just before
3	4	welding.
		Control turns weld output and gas
		flow on and off.
OR		Close valve on cylinder when fin-
		ished welding.

sb5.2* 5/94 − S-0621-C / S-0769 / Ref. 159 059

OM-611 Page 16

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Contents Description OM-611Processes From Miller 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 killCalifornia Proposition 65 Warnings About Pacemakers Principal Safety StandardsEMF Information Identifie un message de sécurité particulier − Consignes DE Sécurité − À Lire Avant UtilisationLE Soudage peut causer un incen- die ou une explosion LES Particules Projetées peu- vent blesser les yeuxLES Pièces Chaudes peuvent cau- ser des brûlures graves LE Bruit peut affecter l’ouïeRisque D’INCENDIE OU D’EXPLO LA Chute DE L’APPAREIL peut blesser’EMPLOI Excessif peut Faire 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 High Frequency Switch High Frequency Selector Switch− Operation ControlsPower Switch And Pilot Light Postflow TimerHigh Frequency Intensity Control 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 Incorrect Installation − High FrequencyWelding Processes Requiring High Frequency Weld ZoneMetal Building Requirements Correct InstallationMetal Building Amperage Range Gas Type Polarity AC − Argon AC − Argon −− Guidelines for TIG Welding Gtaw Preparing Tungsten Electrode For WeldingPositioning The Torch Preparing Tungsten For Conventional AC WeldingTorch Movement During Welding Positioning Torch Tungsten For Various Weld JointsTungsten Without Filler Rod 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