ISO INTERNATIONAL STANDARD 12511 First edrion 1997-12-15 Earth-moving machinery - Hour meters Engins de terrassement - Enregistreurs horaires Iso 态 Referencenumber ISO 12511: 1997(E) ISO12511:1997(E) Foreword IsO (the International Organization for Standardization) is a worldwide federationofnationalstandardsbodies(isOmemberbodies).Theworkof preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and Inon- governmental, in liaison with ISO, also take part in the wo r k. IsO collaboratescloselywiththeIntenationalElectrotechnicalCommission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulatedtothe memberbodiesforvoting.PublicationasanInternational Standardrequiresapprovalbyatleast75%ofthememberbodiescasting a vote. International Standard ISO 12511 was prepared by Technical Committee tsorrc 127, Earth-moving machinery, Subcommittee SC 3, Operation and maintenance. @ISO1997 All righis reseved. Urlessothewise specif d, no part of this publietionmay be reproduced microfilm, without permission in writing from the publisher InternalionalOrganization for Standardization Casepostale56.CH-1211Geneve20·Switzerland Internet [email protected] X.400 C=ch; a=400net: p=iso;O=isocs;s=central INTERNATIONALSTANDARD @ ISO ISO 12511:1997(E) Earth-moving machinery Ho u r meters Scope This International Standard specifies the meters used to measure the amount of time an earth-moving machine has beenoperated. It is applicable to earth-moving machinery as defined in IsO 6165, but does not mandate the use of hour meters on any earth-moving machine. 2 Normative reference International Standard. At the time of publication , the ed 市 o n ind icated was valid. All standards are subject to possib 小 ty of applying the most recent edition of the standard indicated below. Members o( IEC and ISO maintain registers of currentlyvalid International Standards. ISO 6165:1997, Earth-moving machinery -Basic types -Vocabulary 3 Definitions 3.1hour meter: System used to measure the total amount of time an engine-powered machine has been in use NOTE It includesthe metering device and all actuatng devices. 4 General requirements -1 The _hour meter shall be actuated when the engine is started and continue to remain actuated until the engine is stopped. 4 ..2 T e h ou r meter shall record actual operating hours. It shall not give any weighting to the speed at which the engine is rotating .3_Th hour meter shall be capable of operating between 9 V and 16 V d.c. for 12-V systems and 18 V and 32 v d.c.for24-Vsystems 4.4 Th_ehour meter components shall be capable of operating at temperatures between - 4o "C and+ 85 °c , +165°C