1、BRITISH STANDARD BS ISO 14269-5:1997 Tractors and self-propelled machines for agriculture and forestry Operator enclosure environment Part 5: Pressurization system test method ICS 65.060.01BSISO14269-5:1997 This British Standard, having been prepared under the direction of the Engineering Sector Boa
2、rd, was published under the authority of the Standards Board and comes into effect on 15 May 1998 BSI 04-1999 ISBN 0 580 29856 6 National foreword This British Standard reproduces verbatim ISO 14269-5:1997 and implements it as the UK national standard. The UK participation in its preparation was ent
3、rusted to Technical Committee AGE/6, Agricultural tractors and forestry machinery, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interest
4、s informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred
5、 to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a cont
6、ract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theISO title page, page ii, pag
7、e 1 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSISO14269-5:1997 BSI04-1999 i Contents Page National
8、 foreword Inside front cover 1 Scope 1 2 Normative reference 1 3 Definitions 1 4 Test equipment 1 5 Test conditions 1 6 Test procedure 1 7 Test report 1ii blankBSISO14269-5:1997 ii BSI 04-1999 Foreword ISO (the International Organization for Standardization) is a worldwide federation of national sta
9、ndards bodies (ISO member bodies). The work of 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 or
10、ganizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are
11、 circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 14269-5 was prepared by Technical Committee ISO/IC 23, Tractors and machines for agriculture and forestry, Subcommi
12、tteeSC2, Common tests. This first edition, along with the other parts of ISO 14269, cancels and replaces ISO3737:1976, ISO6097:1989 and ISO/TR 8953:1987, which have been technically revised. ISO 14269 consists of the following parts, under the general title Tractors and self-propelled machines for a
13、griculture and forestry Operator enclosure environment: Part 1: Vocabulary; Part 2: Heating, ventilation and air-conditioning test method and performance; Part 3: Determination of effect of solar heating; Part 4: Air filter element test method; Part 5: Pressurization system test method. Descriptors:
14、 Agricultural machinery, forest equipment, self-propelled machines, agricultural tractors, operating stations, operator enclosures, pressurized cabins, environments, working conditions, pressurizing, tests, performance tests.BSISO14269-5:1997 BSI04-1999 1 1 Scope This part of ISO 14269 specifies a t
15、est procedure which will provide for uniform measurement of the pressurization inside an operator enclosure of tractors and self-propelled machines for agriculture and forestry when equipped with a ventilation system. 2 Normative reference The following standard contains provisions which, through re
16、ference in this text, constitute provisions of this part of ISO 14269. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this part of ISO 14269 are encouraged to investigate the possibility of applying the most rece
17、nt edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 14269-1:1997, Tractors and self-propelled machines for agriculture and forestry Operator enclosure environment Part 1: Vocabulary. 3 Definitions For the purposes of t
18、his part of ISO 14269, the definitions given in ISO 14269-1 apply, of which the following are particularly relevant. 3.1 pressurization pressure differential between the static pressure inside and outside of the operator enclosure ISO 14269-1:1997, definition 2.12 3.2 pressurization system means use
19、d to pressurize the operator enclosure including any components which influence the performance of the system ISO 14269-1:1997, definition 2.13 4 Test equipment 4.1 Device to measure pressurization, with a measuring accuracy of 10 % of the observed values. 4.2 Device to measure blower voltage, with
20、a measuring accuracy of 2 % of the observed values. 5 Test conditions 5.1 The pressurization system shall be completely powered by the standard equipment on the test machine with the engine operating at rated speed. The voltage at blower motor terminals shall be no more than 20 % above the nominal r
21、ating of the system (for example 14,4 V for a 12 V system). 5.2 All machine accessories pertinent to the operation of the operator enclosure, enclosure components and blowers shall be standard production parts or the equivalent, adjusted within the machine manufacturers specification limits. Clean a
22、ir filters are recommended since the amount of dirt in the filters may affect pressurization. 5.3 An operator may be present in the operator enclosure throughout the duration of the test. 6 Test procedure 6.1 Operate the pressurization system for a minimum of 15 min prior to obtaining data. The pres
23、surization system shall be operated using maximum outside air, with maximum blower speed setting. No automatic pressurization controls shall be locked out. 6.2 To obtain uniform results, neither the air conditioning nor heating systems shall be in operation during the pressurization system tests. 6.
24、3 Record, for information purposes only, the blower voltage, ambient temperature, barometric pressure, wind velocity, and wind direction in relation to the machine centreline. 6.4 Record enclosure pressure, in pascals. NOTEIt is recommended to avoid velocity head on the pressure measuring device by
25、keeping its outlets away from air streams. 7 Test report The obtained enclosure pressure (Pa) shall be included in the test report.BS ISO 14269-5:1997 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandar
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