Lincoln Electric IM948 VISTA AUTO-DARKENING HELMET - Manual (Page 7)

SHADE SETTING:
Shade selection is accomplished by pushing the Shade button on the back of
the filter. Follow shade selection chart.
If your helmet does not include any one of the shades referenced above, it is
recommended you use the next darker shade.
5
• DO NOT WELD WITH A DAMAGED OR DEFECTIVE LENS,
i.e. cracked, pitted, etc.
DELAY MODE: Set the Delay to Fast or Slow by pushing the Delay button.
The Slow setting is recommended for high amperage applications where the
weld puddle is still very bright after the welding arc has ceased and for situa-
tions where the filter may be temporarily blocked from seeing the welding
arc.
ALWAYS TEST TO BE SURE THE ADF CARTRIDGE IS CHARGED
BEFORE WELDING. The helmet can be placed in sunlight to charge. Do
not store the helmet in a dark cabinet or other storage area for extended peri-
ods. While welding the Arc also charges the ADF cartridge.
Recommended welding processes and cartridge settings can vary for each
welding application. For some low amperage welding applications, cartridge
performance will improve if the Delay Mode is set to SLOW.
AUTO DARKING FILTER / HELMET STORAGE:
• Store in a clean dry location.
6
FAST SLOW TIG GRIND 9 10 12 13
GRIND (PRESS-HOLD) CHECK SETTINGS
SHADE SENSITIVITY DELAY
WARNING
GUIDE FOR SHADE NUMBERS
OPERATION ELECTRODE SIZE ARC MINIMUM SUGGESTED(1)
1/32 in. (mm) CURRENT (A) PROTECTIVE SHADE NO.
SHADE (COMFORT)
Shielded metal arc Less than 3 (2.5) Less than 60 7 –
welding 3-5 (2.5–4) 60-160 8 10
5-8 (4–6.4) 160-250 10 12
More than 8 (6.4) 250-550 11 14
Gas metal arc Less than 60 7 –
welding and flux 60-160 10 11
cored arc welding 160-250 10 12
250-500 10 14
Gas tungsten arc Less than 50 8 10
welding 50-150 8 12
150-500 10 14
Air carbon (Light) Less than 500 10 12
Arc cutting (Heavy) 500-1000 11 14
Plasma arc welding Less than 20 6 6 to 8
20-100 8 10
100-400 10 12
400-800 11 14
Plasma arc cutting (Light)
(2)
(2)
(2) Less than 300 8 9
(Medium) 300-400 9 12
(Heavy) 400-800 10 14
Torch brazing – – 3 or 4
Torch soldering – – 2
Carbon arc welding – – 14
PLATE THICKNESS
in. mm
Gas welding
Light Under 1/8 Under 3.2 4 or 5
Medium 1/8 to 1/2 3.2 to 12.7 5 or 6
Heavy Over 1/2 Over 12.7 6 or 8
Oxygen cutting
Light Under 1 Under 25 3 or 4
Medium 1 to 6 25 to 150 4 or 5
Heavy Over 6 Over 150 5 or 6
(1) As a rule of thumb, start with a shade that is too dark, then go to a lighter shade which gives sufficient view of the weld zone without going
below the minimum. In oxyfuel gas welding or cutting where the torch produces a high yellow light, it is desirable to use a filter lens that absorbs
the yellow or sodium line the visible light of the (spectrum) operation
(2) These values apply where the actual arc is clearly seen. Experience has shown that lighter filters may be used when the arc is hidden by the
workpiece.
.
Data from ANSI Z49.1-2005