ASTM_E_2251_-_14.pdf

Designation:E225114Standard Specification forLiquid-in-Glass ASTM Thermometers with Low-HazardPrecision Liquids1This standard is issued under the fixed designation E2251;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.Scope1.1 The purpose of this standard is to specify liquid-in-glassASTM thermometers using low hazard thermometric liquidsdefined in this standard.1.2 This standard specifies liquid-in-glass thermometersgraduated in degrees Celsius or degrees Fahrenheit that arefrequently identified and used in methods under the jurisdictionof the various technical committees within ASTM.The currentapproved thermometers are listed in Table 1.1.3 The technical requirements for the thermometric liquidsused in the thermometers in Table 1 are specified in AnnexA1.Tests for conformity to the technical requirements are alsofound in Annex A1.NOTE1It has been found by experience that ASTM Thermometers,although developed in general for specific tests,may also be foundsuitable for other applications,thus precluding the need for new thermom-eter specifications differing in only minor features.However,it issuggested that technical committees contact E20.05 before choosing acurrently designated thermometer for a new method to be sure thethermometer will be suitable for the intended application.1.4 For full rationale,see Appendix X1.1.5 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 requirements prior to use.2.Referenced Documents2.1 ASTM Standards:2E1 Specification for ASTM Liquid-in-Glass ThermometersE77 Test Method for Inspection and Verification of Ther-mometersE344 Terminology Relating to Thermometry and Hydrom-etryE563 Practice for Preparation and Use of an Ice-Point Bathas a Reference Temperature3.Terminology3.1 DefinitionsThe definitions given in Terminology E344apply.3.2 Definitions of Terms Specific to This Standard:3.2.1 bulb length,nthe distance from the bottom of thebulb to the junction of the bulb and the stem tubing.3.2.2 contraction chamber,nan enlargement of thecapillary,located below the main scale or between the mainscale and the auxiliary scale,that serves to reduce the scalelength or to prevent contraction of all the liquid column into thebulb.3.2.3 diameter,nthe largest outside dimension of the glasstubing as measured with a ring gage.3.2.4 expansion chamber,nan enlargement at the top ofthe capillary to provide protection against breakage caused byexcessive gas pressure.3.2.5 faden thermometer,na thermometer with a long,thin bulb used to determine emergent stem temperatures.3.2.6 interval error,nthe deviation of the nominal value ofa temperature interval from its true value;either for the totalrange(total interval)or for a part of the range(partial interval).3.2.7 low-hazard liquid,na liquid that is biodegradable,non-hazardous and considered non-toxic in thermometer quan-tities.NOTE2It is the responsibility of the manufacturer to determine thesuitability of a liquid for this standard.In marking the thermometer withtheASTM designation the manufacturer is confirming that the liquid in thethermometer is non-hazardous as defined by current OSHA(OccupationalSafety and Health Administration)standards and non-toxic in thermom-eter quantities per current definitions of the United States EnvironmentalProtection Agency.3.2.8 thermometric liquid,nthe liquid in a liquid-in-glassthermometer that indicates the value of temperature.3.2.9 top of the thermometer,nthe top of the finishedinstrument.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 approved May 1,2014.Published September 2014.Originallyapproved in 2003.Last previous edition approved in 2011 as E225111.DOI:10.1520/E2251-14.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.10 total length,noverall length of the finished instru-ment.3.3 Other terms may be found in the Terminology sectionsof Specification E1 and Test Method E77.4.Specifications4.1 The individual thermometers shall conform to the de-tailed specifications given in Table 1,the general requirementsspecified in Sections 5 15,and Annex A1 and Annex A2.NOTE3Thermometers manufactured to previous revision