Miller Spectrum 875 User Manual

TABLE OF CONTENTS
SECTION 1 − SAFETY PRECAUTIONS - READ BEFORE USING 1.................................
1-1. Symbol Usage 1.......................................................................
1-2. Plasma Arc Cutting Hazards 1...........................................................
1-3. Additional Symbols For Installation, Operation, And Maintenance 3.............................
1-4. California Proposition 65 Warnings 4......................................................
1-5. Principal Safety Standards 4.............................................................
1-6. EMF Information 4.....................................................................
SECTION 2 − CONSIGNES DE SÉCURITÉ − LIRE AVANT UTILISATION 5..........................
2-1. Signification des symboles 5.............................................................
2-2. Dangers liés au coupage à l’arc au plasma 5...............................................
2-3. Dangers supplémentaires en relation avec l’installation, le fonctionnement et la maintenance 8.....
2-4. Proposition californienne 65 Avertissements 9..............................................
2-5. Principales normes de sécurité 9.........................................................
2-6. Informations relatives aux CEM 9.........................................................
SECTION 3 − DEFINITIONS 10..................................................................
3-1. Additional Safety Symbols And Definitions 10................................................
3-2. Miscellaneous Symbols And Definitions 10..................................................
SECTION 4 − SPECIFICATIONS 11..............................................................
4-1. Serial Number And Rating Label Location 11................................................
4-2. Unit Specifications 11....................................................................
4-3. Environmental Specifications 12...........................................................
4-4. Duty Cycle And Overheating 12...........................................................
4-5. Torch Dimensions 13....................................................................
4-6. Power Source Dimensions And Weight 13..................................................
SECTION 5 − INSTALLATION 14................................................................
5-1. Selecting a Location 14..................................................................
5-2. Connecting Work Clamp and Gas/Air Supply 15..............................................
5-3. Connecting And Disconnecting Torch 16....................................................
5-4. Connecting And Disconnecting Work Cable 16...............................................
5-5. Electrical Service Guide 17...............................................................
5-6. Extension Cord Data 17..................................................................
5-7. Selecting A Location And Connecting Input Power 18.........................................
5-8. Connecting Plasma Cutter To Miller Or Hobart Generator Equipped With A
Full KVA Receptacle (NEMA 14-50R) Using Adapter Cord (Part No. 300158) 20...................
5-9. Wiring Optional 240 Volt Plug (119172) For Connection To Miller Bobcat, Trailblazer
Or Hobart Champion 10,000 21...........................................................
5-10. Generator Settings For Plasma Cutter Operation 22..........................................
5-11. Installing Alternative Plug 22..............................................................
SECTION 6 − OPERATION 23...................................................................
6-1. Controls 23............................................................................
6-2. Consumables Storage Compartment 24....................................................
6-3. Trigger Safety Lock 24...................................................................
6-4. Plasma Cutting System Practices 25.......................................................
6-5. Sequence Of Cutting Operation 26.........................................................
6-6. Sequence Of Gouging Operation 27........................................................
6-7. Sequence Of Piercing Operation 28........................................................
6-8. Cutting Speed 29.......................................................................

Miller Spectrum 875 Specifications

General

Amperage Output	20-60 A
CNC Interface	Optional
Gas Supply	Clean, dry, oil-free air or nitrogen
Input Frequency	50/60 Hz
Output Current Range	20-60 A
Welding Process	Plasma cutting
TIG Start	Not applicable
Rated Output	60 A
Cutting Capability	3/4 in (19 mm)
Cutting Capacity	1 in (25 mm)
Severance Capacity	1-1/4 in (32 mm)
Input Phase	1- or 3-Phase
Duty Cycle	60%