【英文标准名称】:StandardTestMethodforColumnCapacityofParticulateMixedBedIonExchangeMaterials
【原文标准名称】:混合粒子层中离子交换材料的柱容量的标准试验方法
【标准号】:ASTMD3375-1995a(2007)
【标准状态】:现行
【国别】:美国
【发布日期】:1995
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D19.08
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:columncapacity;conductivity;ionexchange;mixedbed;Columncapacity;Conductanceandconductivity(electrical)water;Deionization;Ionexchangeresins;Mixed-bedion-exchangeresins;Performancewateranalysisequipment
【摘要】:Thistestmethodcanbeusedtoevaluateunusedmixedbedionexchangematerialsforconformancetospecifications.Whenarepresentativesampleofthemixedbedcanbeobtainedfromanoperatingunit,thistestmethodcanbeusedtoevaluatetheregenerationefficiencybycomparisonwiththesamedataobtainedwithnewmaterialfromthesamemanufacturedlots,orretainedsamplesofthein-placeproducts.Thistestmethodprovidesforthecalculationofcapacityintermsofthevolumeofwatertreatedtoaconductivityendpoint.Thetestmethodaswrittenassumesthatthecationexchangematerialhasbeenregeneratedtothehydrogenformwithacidandtheanionexchangematerialhasbeenregeneratedwithalkalitothehydroxideorfree-baseform.Incertainapplicationsacationexchangematerialinthepotassium,ammonium,orothermonovalentformmaybeencountered.SuchmaterialsmaybetestedfollowingthisprocedureusingTestWaterA(TestMethodsD1782)astheinfluentandsubstitutingthehardnessendpoint(TestMethodsD1782)fortheendpointsprescribedherein.Inmostcasestheproducttestedwillbeproperlymixedandwillcontainthecorrectproportionsofanionandcationexchangematerials.However,ifthepHaswellastheconductivityoftheeffluentismeasured,thetestmethodwillindicatewhichofthecomponentsispresentinexcess;anacideffluentatbreakthroughindicatinganexcessofregeneratedcationexchangegroupsandanalkalineeffluentanexcessofregeneratedanionexchangegroups.Insuchcasesthevolumesofthetwocomponentsobtainedinthefinalbackwashwillindicatewhetherthisimbalancearisesfromimproperregenerationorfromanimproperratioofthetwocomponents.Itshouldbenoted,however,thatnotallunitsarechargedwithabalancedratioofanion-exchangingandcation-exchanginggroups.Hence,whereverpossible,afieldsampleshouldbeevaluatedincomparisonwitharetainedsampleoftheoriginalcharge.Thistestmethodprovidesforthecalculationofcapacityoneitherawetweightbasisoravolumebasis.Althoughsuchmaterialsarenormallyboughtandsoldintermsofcubicfeet,theyareactuallypackagedinwetpounds.Therefore,itisthecapacityonawetweightbasisthatisdirectlycorrelatabletotheamountofmaterialinagivenshipment.Calculationofavolumecapacityisbasedontheexhausted,separatedvolumeofthecomponentsafterbackwashingandresettlingthebed.Thisvolumeischosenbecauseitisdifficult,ifnotimpossible,topackasampleofregeneratedmixedbedmaterialinasmall-diametercolumnreproducibly.Thistestmethodmaybeusedtotestmixedbedresincartridges.Insuchcasestheflowrateoftestwaterandthefrequencyofsamplingmustbevariedtocompensatefortheapproximatevolumeofresininthetestsample.Thetestaswrittenassumesaresinvolumeofapproximately330mL.1.1Thistestmethodcoversthedeterminationoftheperformanceofparticulatemixedbedionexchangematerialsintheregeneratedformwhenusedfordeionization.Itisintendedforuseintestingunusedmixedbedmaterialsandsamplesofregeneratedmixedbedsfromoperatingunits.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G73
【国际标准分类号】:71_100_40
【页数】:4P.;A4
【正文语种】:英语
基本信息
| 标准名称： | 数字移动终端音频性能技术要求和测试方法 |
| 英文名称： | Technical Requirements and Testing Methods for Acoustics Performance of Digital Mobile Terminal |
| 中标分类： |
通信、广播 >>
通信设备 >>
移动通信设备 |
| ICS分类： |
电信、音频和视频技术 >>
电信终端设备 >>
电信终端设备综合
|
| 替代情况： | 被YD/T 1538-2011代替 |
| 发布日期： | 2006-12-11 |
| 实施日期： | 2007-01-01 |
| 首发日期： | |
| 作废日期： | 2011-05-18 |
| 出版日期： | |
| 页数： | 28 |
适用范围
本标准规定了与数字移动终端音频性能相关的发送响度评定值（SLR）、接收响度评定值（RLR）、空闲信道噪声、发送灵敏度/频率特性、接收灵敏度/频率特性、侧音掩蔽评定值（STMR）、收听者侧音评定值（LSTR）、稳定度损耗、声学回声控制、发送失真、接收失真、带外信号、环境噪声抑制（ANR）等技术要求和测试方法。本标准适用于接入公众数字移动网络使用的各种数字终端设备，包括900/1800MHz TDMA数字蜂窝移动通信网络端、900/1800MHz TDMA数字蜂窝移动通信网通用分组无线业务（GPRS）终端、800MHz cdma2000 1x数字蜂窝移动通信网终端。2GHz cdma2000数字蜂窝移动通信网终端、2GHz TC-SCDMA数字蜂窝移动通信网终端、2GHz WCDMA数字蜂窝移动通信网终端。其他数字移动终端也可参照使用。
前言
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引用标准
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所属分类： 通信 广播 通信设备 移动通信设备 电信 音频和视频技术 电信终端设备 电信终端设备综合