ASTM F205-1994(2015) Standard Test Method for Measuring Diameter of Fine Wire by Weighing《用称重法测量细丝直径的标准试验方法》.pdf
《ASTM F205-1994(2015) Standard Test Method for Measuring Diameter of Fine Wire by Weighing《用称重法测量细丝直径的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM F205-1994(2015) Standard Test Method for Measuring Diameter of Fine Wire by Weighing《用称重法测量细丝直径的标准试验方法》.pdf(3页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: F205 94 (Reapproved 2015)Standard Test Method forMeasuring Diameter of Fine Wire by Weighing1This standard is issued under the fixed designation F205; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year of last re
2、vision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the measurement of the averagediameter of fine wire by weighing a known length; it appliesparticularly to
3、 sizes up to 0.13 mm used in electron devices andlamps.1.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is therespon
4、sibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2F180 Test Method for Density of FineWire and RibbonWirefor Electronic Devices3. Apparatus3.1
5、The apparatus shall consist of a suitable torsion or otherdirect-reading balance capable of reading to 0.002 mg or 0.1 %of the weight to be weighed (whichever is larger), with anaccuracy of 0.004 mg or 0.2 % (whichever is larger). The rangeof the balance (or the size of the specimen) shall be such t
6、hatthe reading will lie within the upper half of the scale.4. Test Specimens4.1 Test specimens shall be selected at least 1 m from theend of a spool or sufficiently far from the end to be free fromkinks or other damage resulting in lack of straightness of thecut length.4.2 The wire shall be drawn fr
7、om the spool under a loweven tension so that no elongation of the wire takes place.4.3 Each test specimen shall be cut to a length of 200 6 0.1mm. To prevent stretching, care shall be taken so that thetension is just sufficient to eliminate the sag and curl. Anydisagreement concerning the amount of
8、tension to be used incutting shall be resolved between the manufacturer and thepurchaser.4.4 The test specimen shall be folded upon itself severaltimes and twisted to make a compact bundle with loopconsisting of a single strand for hanging it on the balancebeam. In the case of multiple specimens, al
9、l specimens shall betwisted together and hung by a loop consisting of a singlestrand. The specimen shall be handled as little as possible. Theoperators hands shall be clean and dry.5. Number of Specimens5.1 Weigh a single specimen if its weight lies within theupper half of the scale of the instrumen
10、t. When the weight isless than half of the scale of the instrument, weigh a sufficientnumber of specimens, 200 mm in length, simultaneously sothat the total weight will register in the upper half of the scale,preferably as close to the limit of the balance as possible. Usethe lowest range instrument
11、 compatible with the weight of the200-mm weight specimen to reduce the number of 200-mmlengths that must be weighed together.6. Repetition of Weighing6.1 If the corrected weight of a single specimen lies within60.5 % of either the minimum or the maximum limit specifiedfor the wire weight, cut and we
12、igh two more specimens of wirein a similar manner. When two or more lengths of wire havebeen weighed simultaneously to produce a reading in the upperhalf of the scale because of the small size of the wire, cut andweigh two more sets of specimens in a similar manner.7. Calibration and Checking of the
13、 Balance7.1 Check the balance regularly in accordance with therecommendations of the manufacturer.7.2 If a variety of weights are to be determined, calibrate thebalance at five major points on the scale and at zero bydetermining the weights of calibrated check weights. If anypoint is in error by mor
14、e than 1 %, remove the balance from1This test method is under the jurisdiction of ASTM Committee F01 onElectronicsand is the direct responsibility of Subcommittee F01.03 on MetallicMaterials, Wire Bonding, and Flip Chip.Current edition approved July 1, 2015. Published September 2015. Originallyappro
15、ved in 1945 as B205 45 T. Last previous edition approved in 2010 as F205 94(2010). DOI: 10.1520/F0205-94R15.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the stan
16、dards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1service and repair it.Apply corrections determined by checkingto the apparent readings to obtain corrected weights. Obtaincorrections appli
17、ed to apparent weights by interpolation be-tween the closest calibrated points, one above and one belowthe reading.7.3 If the amount of work to be weighed at one point on thescale justifies it, the balance may be calibrated with a standardweight (or combination of weights) deviating by not more than
18、10 % from that of the weight to be determined. In this case,adjust the balance so that the balance reads the known weightof the check weight correctly when it is in balance, therebyreducing the correction to zero.7.4 Calibrate the balance, at zero under no load, or atpositive values when loaded to c
19、heck weights, by using theaverage of three consecutive readings, taken under conditionsspecified in 7.2 or 7.3, whichever is applicable.8. Calibration with Standard Weights8.1 Check weights are subject to change of mass due towear from handling and use, and from chemical action result-ing from expos
20、ure. Depending on use, but not less than twicea year, compare the calibrated check weights with the primaryweights, calibrated by the National Institute of Standards andTechnology, and apply the necessary corrections.8.2 The primary standard check weights shall be NISTClass M, or equivalent, for wei
21、ght determinations of 2.00 mgor less, and Class S, or equivalent, for weight determinationsover 2.00 mg.9. Procedure9.1 Handle and use the balance as recommended by themanufacturer. Direct particular attention to requirements forcareful handling, protection from vibration and atmosphericdust, errors
- 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:
- ASTMF20519942015STANDARDTESTMETHODFORMEASURINGDIAMETEROFFINEWIREBYWEIGHING 称重 测量 细丝 直径 标准 试验 方法 PDF

链接地址:http://www.mydoc123.com/p-532503.html