VITO VIMSEP Manual De Instrucciones página 30

Filter symbology (Automatic welding filter markings)
CE 4/5–8/9-13 VITO 1/1/1/2 EN379
4 - Light state scale number
5-8/9-13 – Protection shade numbers unclosed state
VITO – Manufacturer identification
1 – Optical class
1 – Diffusion of light class
1 – Variation in luminous transmittance class
2 – Angle of dependence classification
EN379 – Standard number
Helmet marking
VITO – Manufacturer identification
B – Impact resistance level 120m/s
Cover lens marking
VITO – manufacturer identification
EN166 – Standard number
B – Impact resistance level 120m/s
If the symbols F or B are not common to both ocular and the frame, it is the lower level which shall be assigned to the
complete eye protection.