jjg155-1991工作毛细管粘度计检定规程

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1、中华人民共和国国家计量检定规程JJG155-1991工作毛细管粘度计RoutineCapillaryViscometer1991一04一10发布1991一10一01实施国家技术监督局发布JJG155-1991飞工作毛细管粘度计检定规程尹0.口.O.0.0.补。.0.补0.0.~0.口，毛.生。JJG155-1991.。.VerificationRegulationofRoutine。.代替JJG155-1979。.ba、.0.0.0.0.0.0.0.0.o.0~.0.o.0.口CapillaryVi

2、scometer本检定规程经国家技术监督局于1991年04月10日批准，并自1991年10月01日起施行。归口单位:国家标准物质研究中心起草单位:国家标准物质研究中心本规程技术条文由起草单位负责解释工TG155-1991本规程主要起草人:陈惠钊(国家标准物质研究中心)JJG155-1991目录一概述·............................................................................................(1)二技术要求·

3、......................................................................................(1)三检定条件·......................................................................................(3)(一)计量标准·····························································

4、····················⋯⋯(3)(二)检定设备·················································································⋯⋯(4)(三)检定环境·················································································⋯⋯(5)四检定项目和检定方法·..............................

5、.........................................(5)(一)外观检查·················································································⋯⋯(5)(二)常数检定·················································································⋯⋯(5)五检定结果处理和检定周期·.........

6、........................................................(7)附录1标准粘度液的定值方法························································⋯⋯(8)附录2在20℃检定毛细管粘度计的标准粘度液牌号·········.··················⋯⋯(10)附录3检定证书(背面)格式·················································

7、········⋯⋯(13)附录4检定记录格式·····································································⋯⋯(14)JJG155-1991工作毛细管粘度计检定规程本规程适用于新制造、使用中和修理后的乌别洛特(简称乌氏)、平开维奇(简称平氏)，芬斯克(简称芬氏)及逆流型等重力式(也称自由流下式)毛细管粘度计的检定。一概述重力式毛细管粘度计的工作原理，是用相对法测量一定体积的液体在重力作用下流经毛细管所需时间，以求得液体的运

8、动粘度，如图1所示。运动粘度的计算公式为，二Ct(1)式中:，—液体的运动粘度，m澎/s;C—粘度计常数，mm2/S2;t—一定体积的液体流经毛细管的时间，so粘度计常数的检定可采用两种方法。方法1用标准粘度液(以下简称标准液)检定。检定精密粘度计用一级标准液;检定普通工作粘度计用二级标准液(参看JJG2016-1987《粘度计量器具检定系统》)。粘度计的检定应在标准液的定值温度下进行。方法2直接比较法。把被检粘度计与常数标称值相近的基准或标准粘度计置于同一恒温槽中，