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Description of ASTM-E1502 1998ASTM E1502-98Historical Standard: Standard Guide for Use of Freezing-Point Cells for Reference TemperaturesASTM E1502Scope 1.1 This guide describes the essential features of freezing-point cells and auxiliary apparatus, and the techniques required to realize freezing points in the temperature range from 29 to 1085°C. 1.2 Detailed design and construction are not addressed in this guide. 1.3 This guide is intended to describe good practice and establish uniform procedures for the realization of freezing points. 1.4 This guide emphasizes principles. The emphasis on principles is intended to aid the user in evaluating cells, in improving technique for using cells, and in establishing procedures for specific applications. 1.5 For the purposes of this guide, the use of freezing-point cells for the accurate calibration of thermometers is restricted to immersion-type thermometers that, when inserted into the reentrant well of the cell, (1) indicate the temperature only of the isothermal region of the well, and (2) do not significantly alter the temperature of the isothermal region of the well by heat transfer. 1.6 This guide does not address all of the details of thermometer calibration. 1.7 This guide is intended to complement special operating instructions supplied by manufacturers of freezing-point apparatus. 1.8 The following hazard caveat pertains only to the test method portion, Section 7, of this guide. This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Keywords Calibration-temperature instrumentation; Cryoscopic constant; Freezing plateau; Freezing-point cell; ITS-90; Qualification test; Recalescence; Reference materials (RM); Reference temperature; Resistance thermometers; Thermocouples; Thermometers; Undercool; freezing-point cells-reference temperatures, guide ICS Code ICS Number Code 17.200.20 (Temperature-measuring instruments) DOI: 10.1520/E1502-98 The following editions for this book are also available...This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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