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Standard Test Method for Change of Resistance With Temperature of Metallic Materials for Electrical Heating
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NORMA vydána dne 1.4.2019
Označení normy: ASTM B70-90(2019)
Datum vydání normy: 1.4.2019
Kód zboží: NS-947039
Počet stran: 2
Přibližná hmotnost: 6 g (0.01 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Keywords:
coefficient of resistance, heating elements, resistance change, resistors, temperature-resistance,, ICS Number Code 77.040.01 (Testing of metals in general)
Significance and Use |
2.1 The change in resistance with temperature for heating element materials is a major design factor and may influence material selection. The measurement of this change is essential to ensure that heating elements perform as designed. This test method was designed to minimize the effect different manufacturing processes have on resistance change, thereby yielding results that are reproducible. |
1. Scope |
1.1 This test method covers the determination of the change of resistance with temperature of metallic materials for electrical heating, and is applicable over the range of service temperatures. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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