AS ISO 16900.11:2015 pdf download.Respiratory protective devices—Methods of test and test equipment Part 11: Determination of field of vision.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
Iso 16972, Respiratory protective devices — Terms, definitions, graphical symbols and units of measurement ISO 17420-3, Respiratory protective devices — Performance requirements — Part 3: Thread connection
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 16972 and the following apply.
3.1
apertometer
extended hemispherical dome for measuring the angular area of the field of vision (peripheral isopter) of an RPD when mounted on a headform
3.2
peripheral isopter
field of vision while wearing an IWO, indicated by the lighted area, which is measured by a solid line connecting the points
3.3
visual field score
VFS
summation of grid points contained within the peripheral isopter shadow cast onto the apertometer by the RPD
4 Prerequisites
The performance standard shall indicate the conditions of the test. This includes the following:
a) number of specimens;
b) any precondition ing;
c) use of filter simulator, if applicable;
d) any accessories.
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
Iso 16972, Respiratory protective devices — Terms, definitions, graphical symbols and units of measurement ISO 17420-3, Respiratory protective devices — Performance requirements — Part 3: Thread connection
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 16972 and the following apply.
3.1
apertometer
extended hemispherical dome for measuring the angular area of the field of vision (peripheral isopter) of an RPD when mounted on a headform
3.2
peripheral isopter
field of vision while wearing an IWO, indicated by the lighted area, which is measured by a solid line connecting the points
3.3
visual field score
VFS
summation of grid points contained within the peripheral isopter shadow cast onto the apertometer by the RPD
4 Prerequisites
The performance standard shall indicate the conditions of the test. This includes the following:
a) number of specimens;
b) any precondition ing;
c) use of filter simulator, if applicable;
d) any accessories.
