ASTM_D_8055_-_17.pdf

Designation:D805517Standard Guide forSelecting an Appropriate Electronic Thermometer forReplacing Mercury Thermometers in D04 Road and PavingStandards1This standard is issued under the fixed designation D8055;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 Interstate Mercury Education and Reduction Clear-inghouse(IMERC)and the U.S.Environmental ProtectionAgency(EPA)are phasing out the use of mercury thermom-eters because of safety and environmental concerns.This guidewas developed to support replacing mercury thermometers inD04 standards with appropriate electronic thermometers.1.2 This guide provides assistance for the D04 subcommit-tees when selecting electronic thermometers for general use inwater or oil baths and ovens and as possible replacements forSpecification E1 mercury thermometers currently used in D04road and paving standards.Guidance for using non-mercuryliquid thermometers in place of mercury thermometers can befound in Specification E2251.1.3 Some guidance is also provided for selecting a hand-held infrared thermometer for use in field applications.1.4 UnitsThe values stated in SI units are to be regardedas standard.No other units of measurement are included in thisguide.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 limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D3666 Specification for Minimum Requirements for Agen-cies Testing and Inspecting Road and Paving MaterialsE1 Specification for ASTM Liquid-in-Glass ThermometersE644 Test Methods for Testing Industrial Resistance Ther-mometersE1137/E1137M Specification for Industrial Platinum Resis-tance ThermometersE2251 Specification for Liquid-in-Glass ASTM Thermom-eters with Low-Hazard Precision Liquids3.Summary of Practice3.1 Guidance is provided for selecting a sensor based on adesired upper and lower range of temperatures,and accuracy.Guidance is also provided for selecting an appropriate sensorfor replacing specific Specification E1 mercury thermometerscurrently used in D04 standards.4.Significance and Use4.1 General guidance is provided for electronic thermom-eters for general temperature measurements typically neededfor D04 practices and test methods which need to monitoroven,water and oil bath,and material temperatures duringdrying,heating,aging,and mixing.4.2 All ASTM standards under the management of the D04Main Committee were individually reviewed,and a list of allSpecification E1 mercury thermometers was prepared alongwith the required temperature range and information about thethermometer placement in each method.4.2.1 This specific information was used to identify themost appropriate type(s)of electronic thermometers which can1This guide is under the jurisdiction of ASTM Committee D04 on Road andPaving Materials and is the direct responsibility of Subcommittee D04.99 onSustainable Asphalt Pavement Materials and Construction.Current edition approved March 1,2017.Published April 2017.Originallyapproved in 2017.DOI:10.1520/D8055-17.2For 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 StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 be used to replace mercury thermometers in the current D04road and paving standards.5.Electronic Thermometers5.1 Basic Background Information for Understanding KeyElements of Different Types of Electronic Temperature Sensors:5.1.1 Most sensors require multiple algorithms to convertelectrical signals to temperature measurements.These algo-rithms are only useful over a portion of a temperature range,and different algorithms are needed above and below 0 C.5.1.2 Sensor accuracy is improved by increasing the numberof algorithms which are applicable over narrower temperaturer