ASTM_D_5931_-_13.pdf

Designation:D593113Standard Test Method forDensity and Relative Density of Engine CoolantConcentrates and Aqueous Engine Coolants by DigitalDensity Meter1This standard is issued under the fixed designation D5931;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 the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers the determination of the densityor relative density of engine coolant concentrates and aqueousengine coolants.1.2 This test method should not be applied to samples sodark in color that the absence of air bubbles in the sample cellcannot be established with certainty.1.3 The accepted units of measure for density are grams permilliliter or kilograms per cubic meter.1.4 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-bility of regulatory limitations prior to use.For specific hazardstatements,see Note 1.2.Referenced Documents2.1 ASTM Standards:2D1193 Specification for Reagent WaterD4052 Test Method for Density,Relative Density,and APIGravity of Liquids by Digital Density MeterE230 Specification and Temperature-Electromotive Force(EMF)Tables for Standardized Thermocouples3.Terminology3.1 Definitions:3.1.1 relative density,nthe ratio of the density of amaterial at a stated temperature to the density of water at thesame stated temperature.4.Summary of Test Method4.1 A small volume of liquid sample is introduced into anoscillating sample tube,and the change in oscillating frequencycaused by the change in the mass of the tube is used inconjunction with calibration data to determine the density ofthe sample.5.Significance and Use5.1 Density is a fundamental physical property that can beused in conjunction with other properties to characterize enginecoolant concentrates and aqueous engine coolants.5.2 Determination of the density or relative density of theseproducts is necessary for the conversion of measured volumesto volumes at the standard temperature of 20C(68F).6.Apparatus6.1 Digital Density Analyzer,consisting of a U-shaped,oscillating sample tube and a system for electronic excitation,frequency counting,and display.The analyzer must accommo-date the accurate measurement of the sample temperatureduring measurement or must control the sample temperature asdescribed in 6.2.The instrument must meet the precisionrequirements described in this test method.6.2 Circulating ConstantTemperature Bath,(optional)ca-pable of maintaining the temperature of the circulating liquidconstant to 60.05C in the desired range.Temperature controlcan be maintained as part of the density analyzer instrumentpackage.6.3 Syringes,at least 2 mL in volume with a tip or anadapter tip that will fit the opening of the oscillating tube.6.4 Flow-Through or Pressure Adapter,for use as an alter-native means of introducing the sample into the densityanalyzer either by a pump or by vacuum.6.5 Temperature Measuring Instrument,(Environmentallysafe thermometer or thermocouple).An ASTM Partial Immer-sion Thermometer,having a range from-5 to 300C(20 to580F)and conforming to the requirements for thermometer2C or 2F,as prescribed in Specification D1193,or somesuitable non-mercury containing temperature measuring1This test method is under the jurisdiction of ASTM Committee D15 on EngineCoolants and Related Fluids and is the direct responsibility of SubcommitteeD15.03 on Physical Properties.Current edition approved May 1,2013.Published June 2013.Originallyapproved in 1996.Last previous edition approved in 2007 as D593196(2007)DOI:10.1520/D5931-13.2For 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 standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 device,such as a thermocouple,capable of operating in thesame temperature range and having equal or better accuracy assummarized in Specification E230.See section 13,Precisionand Bias.The data presented in this paragraph is derived usingmercury-in-glass thermometers only.7.Reagents and Materials7.1 Purity of ReagentsUse reagent grade chemicals in alltests.Unless otherwise indicated,all reagents shall conform tothe specifications of the Committee on Analytical Reagents ofthe American Chemical Society,where such specifications areavailable.3Other grades may be used,provided it is firstascertained that the reagent is of sufficiently high purity topermit its use without lessening the accuracy of the determi-na