Smarter tools MIG-135 Manual Del Operador página 15

The correct filter shade is selected according to the welding process, wire
diameter, and operating current. The table below gives the correct shade
numbers for different situations.
•
ALWAYS use suggested shade numbers instead of minimum shades.
•
Provide additional task lighting that suits welders' needs.
•
ALWAYS use the same shade as the welder's if you are directly observing
the welding arc.
•
Do not use gas welding goggles for arc welding.
•
Do not substitute modified glasses, sunglasses, smoked plastic or other
materials for proper welding lenses.
Shade numbers are given as a guide only and may be varied to suit individual needs.
Process
Shielded Metal Are
Welding (SMAW)
Gas Metal Arc
Welding (GMAW)
and Flux Cored Arc
Welding (FCAW)
Gas Tungsten Arc
Welding (GTAW)
Air Carbon Arc
Cutting (CAC-A)
Plasma Arc Welding
(PAW)
Plasma Arc Cutting
(PAC)
*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.
LENS SHADE SELECTOR
Electrode Size in.
(mm)
Less than 3/32 (2.4)
3/32-5/32 (2.4-4.0)
5/32-1/4 (4.0-6.4)
More than ¼ (6.4)
Arc Current
(Amperes)
Less than 60
60-160
160-250
250-550
Less than 60
60-160
160-250
250-550
Less than 50
50-100
150-500
Less than 500
500-1000
Less than 20
20-100
100-400
400-800
Less than 20
20-40
40-60
60-80
80-300
300-400
400-800
1-11
Minimum Suggested*
Protective Shade No.
Shade (Comfort)
7
8
10
11
7
10
10
10
8
8
10
10
11
6 6 to 8
8
10
11
4
5
6
8
8
9
10
-
10
12
14
-
11
12
14
10
12
14
12
14
10
12
14
4
5
6
8
9
12
14