Miller XT30C Owner's Manual - Page 6

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ELECTRIC SHOCK can kill.

SIGNIFICANT DC VOLTAGE exists in

inverter power sources AFTER the re-

moval of input power.

D Turn Off unit, disconnect input power, check voltage on input ca-

pacitors, and be sure it is near zero (0) volts before touching any

parts. Check capacitors according to instructions in Mainte-

nance Section of Owner's Manual or Technical Manual before

touching any parts.

EXPLODING PARTS can injure.

D On inverter power sources, failed parts can ex-

plode or cause other parts to explode when

power is applied. Always wear a face shield

and long sleeves when servicing inverters.

FLYING SPARKS can injure.

Sparks and hot metal blow out from the cutting arc.

Chipping and grinding cause flying metal.

Wear approved face shield or safety goggles with side shields.

Wear proper body protection to protect skin.

Wear flame-resistant ear plugs or ear muffs to prevent sparks from

entering ears.

ARC RAYS can burn eyes and skin.

Arc rays from the cutting process produce intense

visible and invisible (ultraviolet and infrared) rays

that can burn eyes and skin.

Wear face protection (helmet or shield) with a proper shade of filter

lenses to protect your face and eyes from arc rays and sparks when

cutting or watching. ANSI Z49.1 (see Safety Standards) suggests a

No. 9 shade (with No. 8 as minimum) for all cutting currents less

than 300 amperes. Z49.1 adds that lighter filter shades may be used

when the arc is hidden by the workpiece. As this is normally the case

with low current cutting, the shades suggested in Table 1 are pro-

vided for the operator's convenience.

Wear approved safety glasses with side shields under your helmet

or shield.

Use protective screens or barriers to protect others from flash, glare

and sparks; warn others not to watch the arc.

Wear protective clothing made from durable, flame-resistant

material (leather, heavy cotton, or wool) and foot protection.

Table 1. Eye Protection For Plasma Arc Cutting

Current Level In Amperes

Below 20

20 − 40

40 − 60

60 − 100

NOISE can damage hearing.

Prolonged noise from some cutting applications can

damage hearing if levels exceed limits specified by

OSHA (see Safety Standards).

Use approved ear plugs or ear muffs if noise level is high.

Warn others nearby about noise hazard.

OM-255 590 Page 2

Minimum Shade Number

FUMES AND GASES can be hazardous

Cutting produces fumes and gases. Breathing

these fumes and gases can be hazardous to

your health.

Keep your head out of the fumes. Do not breathe the fumes.

If inside, ventilate the area and/or use local forced ventilation at the

arc to remove cutting fumes and gases.

If ventilation is poor, wear an approved air-supplied respirator.

Read and understand the Material Safety Data Sheets (MSDSs)

and the manufacturer's instruction for metals to be cut, coatings,

and cleaners.

Work in a confined space only if it is well ventilated, or while wearing

an air-supplied respirator. Fumes from cutting and oxygen depletion

can alter air quality causing injury or death. Be sure the breathing air

is safe.

Do not cut in locations near degreasing, cleaning, or spraying oper-

ations. The heat and rays of the arc can react with vapors to form

highly toxic and irritating gases.

Do not cut on coated metals, such as galvanized, lead, or cadmium

plated steel, unless the coating is removed from the cutting area, the

area is well ventilated, and while wearing an air-supplied respirator.

The coatings and any metals containing these elements can give off

toxic fumes when cut.

Do not cut containers with toxic or reactive materials inside or

containers that have held toxic or reactive materials − they must be

emptied and properly cleaned first.

PLASMA ARC can injure.

The heat from the plasma arc can cause serious

burns. The force of the arc adds greatly to the burn

hazard. The intensely hot and powerful arc can

quickly cut through gloves and tissue.

Keep away from the torch tip.

Do not grip material near the cutting path.

The pilot arc can cause burns − keep away from torch tip when trig-

ger is pressed.

Wear proper flame-retardant clothing covering all exposed body ar-

eas.

Point torch away from your body and toward work when pressing

the torch trigger − pilot arc comes on immediately.

Turn off power source and disconnect input power before disas-

sembling torch or changing torch parts.

Use only torch(es) specified in the Owner's Manual.

CYLINDERS can explode if damaged.

Compressed gas cylinders contain gas under high

pressure. If damaged, a cylinder can explode. Since

gas cylinders are normally part of metalworking pro-

cesses, be sure to treat them carefully.

Protect compressed gas cylinders from excessive heat, mechani-

cal shocks, physical damage, slag, open flame, sparks, and arcs.

Install and secure cylinders in an upright position by chaining them

to a stationary support or equipment cylinder rack to prevent falling

or tipping.

Keep cylinders away from any cutting or other electrical circuits.

Never allow electrical contact between a plasma arc torch and a

cylinder.

Never cut on a pressurized cylinder − explosion will result.

Use only correct compressed gas cylinders, regulators, hoses, and

fittings designed for the specific application; maintain them and as-

sociated parts in good condition.

Turn face away from valve outlet when opening cylinder valve.

Keep protective cap in place over valve except when cylinder is in

use or connected for use.

D Use the right equipment, correct procedures, and sufficient number

of persons to lift and move cylinders.

Read and follow instructions on compressed gas cylinders, asso-

ciated equipment, and Compressed Gas Association (CGA)

publication P-1 listed in Safety Standards.