ASME 3287 pdf download

ASME 3287 pdf download NDUSTRIALJCKS: SYMBOLS FOR CONTROLS AND OTHER DISPLAYS
1 scoPE
This Standard establishes symbols for use on operatorconirols and oier displays on powered industria trucks.
2 NORMATiIVE REFERENCES
The following normative docurnents contain provi-sions which，through reference in this iext，constituteprovisions of this Standard. For dated references,subse-quent amendments to,or revisions of，any of thcsepublications do not apply. However，partics toagreements based on this Standard arc cncouraged toinvestigatc the possibility of applying the most recenteditions of the normative documents indicated below.For undated references,the latest edition of the norma-tive document referred to applies. Members of ISO andIEC maintain registers of currently valid internationalstandards.
ISO3461-1:1988,General Principles for the Creationof Graphical Symbols — Part l: (iraphicalSymbolsfor Use on Equipment.
ISO 4196,Graphical Symbols — Use of Arrows.
TERM AND DEFINITION
For the purposes of this Standard, the following termand definition apply.
3.1
.xymhol:visually perceptible figure used to transmitinformation independently of language.
NOTE: It may be produced by drawing,printing, or other means.
4.1
symbols shall be as shown in succeeding clauses ofthisStandard. However.symbols that are shown inoutline form may. in actual use. be filled for enhancedclarity of reproduction and improved visuai perception by te operaior, excepi as otherwise noted for individuaisymbols.
4.2
Limitations inherent in some reproduction and displaytechnologies may require increased line thickness orother minor modifications of symbols. Such modifica-tions are accepiabie.providied the symboi remains un-changec in its basic graphicai elements and easilydiscernible by the operator.
4.3
Additionally, to improve the appearance and percepti-bility of a graphical symbol. or to coordinate with thedesign of the equipment to which the symbol is applied,it may be necessary to change the iine thickness orround the corners of a synbol. The graphic designeris normally free to make such changes，provided thatthe essentiai perceplual characieristics of the symbolare maintained.See ISO 3461-1: 1988，subclause 10.2.
4.4
For actual use. all symbols shall be reproduced largeenough to be easily discernibie by the operator. SeeISo 3461-1 for guidelines on the proper sizing ofsymbols.Symnbols shall be used in the orientation shownin this Standard unless other wise noted for individuaisymbols.
4.5
Most symbols are constructed using a building blockapproach in which various symbols and symboi elementsare combined in a logical manner to produce newsymbols.
4.6
lf a symboi shows a machine or parts of a machinefrom a side view. a machine moving from right to leftacross the symbol grid area shall be assumed. If asymboi shows a nachine or parts of a machine from an overhead view,a machine moving from bottom totop across the symbol grid area shall be assumed.
4.7
Syubois on controis and dispiays shaii have a goodcontrast to their background. A light symbol on a darkbackground is preferred for nost controls. Displaysmay use either a light symbol on a dark backgroundor a dark symbol on a light background，dependingupon which altcrnativc provides the best visual percep-tion. When a symbol image if reversed (for example,from black-on-white to whitc-on-black and vice versa),it shall be done for the entire symbol.