ISO IEC 21118:2020 download

06-23-2021 comment

ISO IEC 21118:2020 download.Information technology — Office equipment — Information to be included in specification sheets for data projectors.
1 Scope
ISO IEC 21118 specilies the information to be included in the specification sheets for front projection type data profrctors and the form of specification sheets.
ISO IEC 21118 is not applicable to units for a rear screen projection.
2 NormatIve references
The following documents are referred to In the text in such a way that some or all of their content constitutes requirements of ISO IEC 21118. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 7779:2018, Acoustics — Measurement of airborne noise emitted by information technology and telecommunications equipment
ISO 11201, Acoustics — Noise emitted by machinery and equipment — Determination of emission sound pressure levels at a work station and at other specified positions Er, an essentially free field over a reflecting plane with negligible environmental corrections
IEC 60107-2:1997. Methods of measurement on receivers for television broadcast transmissions — Part 2:
Audio channels — General methods and methods for monophonic channels
IEC 61947-I, Electronic projection — Measurement and documentation of key performance criteria — Part 1: Fixed resolution projectors
projection distance
distance between the projector and the screen measured In linear units (I.e. metres, feet. or Inches)
Note 1 to entry: This distance Is considered to be the distance from the image displayed on the screen to the outermost element of the projection lens.
ISOURCE: IEC 61947-1:2002.3.29]
rear screen projection
projection with image projected through a light-transmitting screen to the audience side of the screen
ISOURCE: IEC 61947-1:2002,3.30]
standard outside dimensions
maximum dimensions of the product after removing the packaging, including any protrusions
4 Measuring methods and conditions
The measuring methods and conditions in terms of the performance specification items in TahIeJ. shall be in accordance with Annex B.
5 Items In specification sheets
Table 1 lists the items that shall appear in the specification sheets. Items whose properties shall be included in the specification sheets are marked as R (required), while other items whose properties are given for Information are marked as (optional).
Values in the specilication of light output, contrast ratio (full white/full black) and centre to corner zone ratio shall be defined as averages of productions. The lower-limit values of the product at the time of shipment shall be at least 80% of the values In specification sheets for these three items.
The specilication sheets shall have a statement Indicating accordance with this document. The terminology shown in the item column of Table I shall Lw used In the specification sheets. Items marked as optional may be omitted, along with any items that do not apply to the particular projector model. If an Item is omitted; the order of items Included In the specification sheets shall maintain the same order as shown in TahjeJ.
The form of the specification sheets shall be as given n AnuexA.
NOTE The term specification sbeets applies to documents which describe the perlormance characteristics oF the data projeclor which can be Included in instruction manuals. ProdUct calalogues or en websl1e.

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