3M Speedglas 9100 MP Manual De Instrucciones página 15

2-Step Recovery
The two longest delay settings include an intermediate stage in the recovery. As the arc extinguishes, the filter will
briefly recover to shade 5 and then to shade 3. The time intervals for each stage are listed as d1 and d2 in Table 3.
Tack Mode
This setting may help reduce eye fatigue resulting from the eye frequently adjusting to differing light levels during
rapid tack welding. As the arc extinguishes, the filter will recover to shade 5. If another arc is not struck within
2 seconds the filter will return to the normal light state (shade 3).
Low Battery Indicator
The batteries should be replaced when the low battery indicator flashes or LEDs do not flash when the
buttons are pressed.
Operation
Shielded metal arc
Gas-metal-arc
welding
Gas-tungsten-arc
Air-carbon-arc
cutting
Plasma-arc
welding
Plasma-arc cutting
Carbon arc welding
Table 2. Recommended Guide for Shade Numbers
(Adapted from ANSI Z49.1-2003)
Electrode
diameter inches Arc current, amps
< 3
3-5
5-8
> 8
Protective Shade
< 60
60-160
160-250
250-550
< 60
60-160
160-250
250-500
< 50
50-150
150-500
< 500
500-1000
< 20
20-100
100-400
400-800
< 300
300-400
400-800
12
Minimum Recommended
Shade Number
7
8
10
11
7
10
10
10
8
8
10
10
11
6
8
10
11
8
9
10
---
10
12
14
---
11
12
14
10
12
14
12
14
6-8
10
12
14
9
12
14
14