AS 1337.0:2020 pdf free.Personal protective equipment Part 0: Eye and face protection—Vocabulary.
3.10.3.12
peripheral awareness welding filter
additional protective filters (3.10.1.1), not intended for observing the welding arc, mounted in a welding helmet (3.5.4.7) or welding face shield (3.5.4.3) on either side of the main welding filter (3.10.3.1) that is intended for observing the welding arc
Note 1 to entry: The shade number of these filters is typically low enough to give peripheral vision when not welding (with the automatic welding filter in the light state) and high enough to avoid discomfort glare from the side when welding (with the automatic welding filter in the dark state).
3.10.3.13
optical sensitivity of welding detection
ability of an automatic welding filter (3.10.3.2) to detect and react to the optical radiation (3.2.1) from a welding arc and differentiate from ambient illumination
Note 1 to entry: Ambient illumination is typically indoor ambient light (i.e. a combination of daylight and artificial light) or outdoor ambient light (e.g. daylight).
Note 2 to entry: Welding filters need to be able to differentiate the welding arc from ambient light, especially from angularly small sources such as the sun, or artificial sources that flicker such as fluorescent and discharge lamps.
3.11 Test equipment
3.11.1
trained observer
person trained in testing of eye and face protectors (3.5.1.1) with a binocular decimal visual acuity of at least 1,0 (6/6 or 20/20) and wearing the appropriate refractive correction, if necessary, for the observation distance of the test
3.11.2
calibration lens
lens with values known to sufficiently small uncertainties of measurement that are used for adjusting
or checking measuring and test equipment
Note 1 to entry: Calibration lenses are available with calibrations traceable to national standards.
3.11.3
headform
standard anatomical head with defined features suitable for use as a support for protectors (3.5.1.1) during testing
3.11.4
international rubber hardness degree scale IRHD scale
hardness scale chosen so that 0 represents the hardness of material having a Young’s modulus of zero and 100 represents the hardness of a material of infinite Young’s modulus
Note 1 to entry: A Young’s modulus of zero means “no measurable resistance to indentation”; a modulus of infinity means “no measurable indentation”.
Note 2 to entry: Low hardness is 10 IRHD to 35 IRHD, medium hardness is 35 IRHD to 85 IRHD, high hardness is 85 IRHD to 100 IRHD.
[SOURCE: ISO 48: 2010, 3.1]
3.11.5
photocurrent
part of the output current of a photoelectric detector (3.11.6) that is caused by incident radiation
Note 1 to entry: Photocurrent is expressed in amperes (A).AS 1337.0 pdf download.