3M Speedglas 9100 FX Manual De Instrucciones página 8

Low Battery Indicator
The batteries should be replaced when the low battery indicator fl ashes or LEDs do not fl ash when the
buttons are pressed.
Table 2. Recommended Guide for Shade Numbers
(Adapted from ANSI Z49.1-2003)
Electrode
diameter
Operation inches
Shielded metal arc < 3
3-5
5-8
> 8
Gas-metal-arc welding
Gas-tungsten-arc
Air-carbon-arc cutting
Plasma-arc welding
Plasma-arc cutting
Carbon arc welding
Arc Minimum Recommended
current, Protective Shade
amps Shade Number
< 60 7 ---
60-160 8 10
160-250 10 12
250-550 11 14
< 60 7 ---
60-160 10 11
160-250 10 12
250-500 10 14
< 50 8 10
50-150 8 12
150-500 10 14
< 500 10 12
500-1000 11 14
< 20 6 6-8
20-100 8 10
100-400 10 12
400-800 11 14
< 300 8 9
300-400 9 12
400-800 10 14
14
11
delay
d 1 d 1
d 2
d 2
∑
Table 3
12