ASTM E2488-22

1.1This guide is intended for use with controlled temperature comparison baths that contain test fluids and operate within the temperature range of -100 °C to 550 °C.

1.2This guide describes the essential features of controlled temperature fluid baths used for the purpose of thermometer calibration by the comparison method.

1.3This guide does not address the details on the design and construction of controlled-temperature fluid baths.

1.4This guide describes a method to define the working space of a bath and evaluate the temperature variations within this space. Ideally, the working space will be as close as possible to isothermal.

1.5This guide does not address fixed point baths, ice point baths, or vapor baths.

1.6This guide does not address fluidized powder baths.

1.7This guide does not address baths that are programmed to change temperature.

1.8The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.9This 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.

1.10This 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.