ASTM E100-17 Standard Specification for ASTM Hydrometers.pdf
《ASTM E100-17 Standard Specification for ASTM Hydrometers.pdf》由会员分享,可在线阅读,更多相关《ASTM E100-17 Standard Specification for ASTM Hydrometers.pdf(10页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: E100 17Standard Specification forASTM Hydrometers1This standard is issued under the fixed designation E100; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates t
2、he year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope1.1 This specification covers glass hydrometers of variousscale graduation systems, as
3、 required by the ASTM TestMethods in which they are used.1.2 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bili
4、ty of regulatory limitations prior to use.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the Wor
5、ld Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D287 Test Method for API Gravity of Crude Petroleum andPetroleum Products (Hydrometer Method)D3290 Specification for Bond and Ledger Papers for Perma-nent Records (Withdrawn 2010)3E1 Specifica
6、tion for ASTM Liquid-in-Glass ThermometersE77 Test Method for Inspection and Verification of Ther-mometersE126 Test Method for Inspection, Calibration, and Verifica-tion of ASTM HydrometersE344 Terminology Relating to Thermometry and Hydrom-etryE2251 Specification for Liquid-in-Glass ASTM Thermom-et
7、ers with Low-Hazard Precision LiquidsE2877 Guide for Digital Contact Thermometers2.2 Other Standards:ISO 1768:1975 Glass HydrometersConventional Valuefor the Thermal Cubic Expansion Coefficient (for Use inthe Preparation of Measurement Tables for Liquids)3. Terminology3.1 DefinitionsThe definitions
8、given in Terminology E344apply.3.2 Definitions of Terms Specific to This Standard:3.2.1 ledger paper, na paper characterized by strength,high tearing resistance, eraseability, water resistance, inkreceptivity, uniformity of surface, and smoothness.3.2.1.1 DiscussionOriginally, ledger paper was used
9、espe-cially for pen and ink records. Most ledger papers are surfacesized, frequently subjected to appreciable wear, and shall havea high degree of permanence and durability.3.2.2 length of the scale, nlength of the nominal range inthe stem, not including graduations extending above and belowthe nomi
10、nal limits.3.2.3 relative density (formerly specific gravity), nratio ofthe mass of a given volume of material at a stated temperatureto the mass of an equal volume of gas-free distilled water at thesame or different temperature. Both reference temperaturesshall be explicitly stated.3.2.3.1 Discussi
11、onCommon reference temperatures in-clude 60F/60F, 20C/20C, 20C/4C. The historic termspecific gravity may still be found.3.2.3.2 DiscussionThe reference temperatures for ASTMhydrometers and thermohydrometers are found in Table 1under the heading “standard temperature”.3.2.4 specific gravity, nan hist
12、oric term, replaced byrelative density.3.2.4.1 Discussionhydrometers manufactured to this stan-dard may be marked sp. gr., rel. density, or with bothdesignations. The two terms are both equally acceptable in thisstandard and are used interchangeably.3.2.5 thermohydrometer, nglass hydrometer having a
13、nintegral thermometer.3.2.6 top of the hydrometer, ntop of the finished instru-ment.1This specification is under the jurisdiction of ASTM Committee E20 onTemperature Measurement and is the direct responsibility of Subcommittee E20.05on Liquid-in-Glass Thermometers and Hydrometers.Current edition app
14、roved May 1, 2017. Published May 2017. Originallyapproved in 1953. Last previous edition approved in 2015 as E100 15a. DOI:10.1520/E0100-17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volum
15、e information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international stand
16、ard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.13.2.7
17、total length, noverall length of the finished instru-ment.4. Specifications4.1 Individual hydrometers shall conform to the detailedspecifications in Table 1 and to the general requirementsspecified in Sections 515.4.2 Hydrometers shall be subjected to the initial calibrationcriteria found in Section
18、 14, the inspection criteria found inSection 16, and the calibration and verification criteria found inSection 17.4.3 Hydrometers manufactured to previous revisions of thisspecification shall retain the same ASTM status as thosemeeting current specifications.4.4 At the time of purchase, scale errors
19、 shall be within themaximum scale error found in Table 1.NOTE 1CautionUsers should be aware that both temperature anddensity indications of thermohydrometers may change with roughhandling, shock, exposure to aggressive liquids, and thermal cycling,among other factors. Consequently, test results and
20、performance obtainedat the time of manufacture may not necessarily apply throughout anextended period of use. Periodic calibration or verification of theseinstruments, in accordance with procedures set forth in Test Method E126(for the hydrometer), or Test Method E77 (for the integral thermometer),i
21、s recommended5. Type5.1 Hydrometers shall be of the constant-mass, variable-displacement type. Hydrometers shall be made of glass, exceptfor the scale, ballast, and the thermometric liquid of thermo-hydrometers.5.2 The outer surface of the stem and body shall besymmetrical about the vertical axis. T
22、here shall be no unevenor unnecessary thickening of the walls, and no abrupt changesor constrictions that would hinder thorough cleaning or tend totrap air bubbles when the instrument is immersed.5.3 The hydrometer shall always float with its axis verticalin liquids for which it is intended.5.4 The
23、hydrometer shall be thoroughly dry on the insidewhen sealed. The top of the stem shall be neatly roundedwithout unnecessary thickening.5.5 The glass shall be smooth, transparent, and free ofbubbles, cracks, strain patterns, or other imperfections thatmight interfere with the use of the hydrometer. T
24、he glass shalladequately resist the reaction of chemical agents to whichhydrometers may be exposed and shall have suitable thermalproperties to permit its use over the range of temperatures towhich it may be subjected. In general, glasses suitable forconstructing the bulbs of thermometers are satisf
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
5000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTM E100 17 Standard Specification for Hydrometers

链接地址:http://www.mydoc123.com/p-287027.html