Tweco ArcMaster 401S Manuel d'utilisateur télécharger pdf (Page 8)

ARCMASTER 401S POWER SOURCE

SAFETY INSTRUCTIONS AND WARNINGS 1-2 Manual 0-5345

WARNING

ARC RAYS can burn eyes and skin; NOISE

can damage hearing. Arc rays from the

welding process produce intense heat and

strong ultraviolet rays that can burn eyes

and skin. Noise from some processes can

damage hearing.

1. Wear a welding helmet ﬁtted with a proper shade

of ﬁlter (see ANSI Z49.1 listed in Safety Standards)

to protect your face and eyes when welding or

watching.

2. Wear approved safety glasses. Side shields

recommended.

3. Use protective screens or barriers to protect others

from ﬂash and glare; warn others not to watch the

arc.

4. Wear protective clothing made from durable,

ﬂame-resistant material (wool and leather) and foot

protection.

5. Use approved ear plugs or ear muffs if noise level

is high.

6. Never wear contact lenses while welding.

AWS F2.2:2001 (R2010), Adapted with permission of the American Welding Society (AWS), Miami, Florida

Guide for Shade Numbers

Process

Electrode Size in.

(mm)

Arc Current

(Amperes)

Minimum

Protective

Shade

Suggested*

Shade No.

(Comfort)

Shielded Metal Arc Welding

(SMAW)

Less than 3/32 (2.4)

3/32-5/32 (2.4-4.0)

5/32-1/4 (4.0-6.4)

More than 1/4 (6.4)

Less than 60

60-160

160-250

250-550

Gas Metal Arc Welding (GMAW)

and Flux Cored Arc Welding

(FCAW)

Less than 60

60-160

160-250

250-550

Gas Tungsten arc Welding

(GTAW)

Less than 50

50-150

150-500

Air Carbon Arc Cutting (CAC-A)

(Light)

(Heavy)

Less than

500

500-1000

Plasma Arc Welding (PAW)

Less than 20

20-100

100-400

400-800

6 to 8

Plasma Arc Cutting (PAC)

Less than 20

20-40

40-60

60-80

80-300

300-400

400-800

* As a rule of thumb, start with a shade that is too dark to see the weld zone. Then go to a lighter shade

which gives sufﬁcient view of the weld zone without going below the minimum. In oxyfuel gas welding,

cutting, or brazing where the torch and/or the ﬂux produces a high yellow light, it is desirable to use a

ﬁlter lens that absorbs the yellow or sodium line of the visible light spectrum.

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Tweco ArcMaster 401S Manuel d'utilisateur Page 8

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