The purpose of this ASME Performance Test Code (PTC) is to give instructions and guidance for the accurate determination of temperature values in support of the ASME Performance Test Codes. The choice of method, instruments, required calculations, and corrections to be applied depends on the purpose of the measurement, allowable uncertainty, and characteristics of the equipment being tested. Measurement of temperature is generally considered to be one of the simplest and most accurate measurements performed in engineering. While true when compared to other measured parameters, there are many challenges. Accurate measurement of temperature can be obtained only by observance of suitable precautions in the selection, installation, and use of temperature-measurin
g instruments and in the proper interpretation of the results obtained with them. In some cases, an arbitrarily standardized method is prescribed in the Performance Test Codes that is to be followed in making temperature measurements under such conditions. Some of the instruments available for temperature measurement can indicate temperature to a closer degree of accuracy than is required in some of the tests considered in the Performance Test Codes. The difficulty in obtaining accurate temperature measurements with such instruments is encountered in installation or use of the temperature measuring instruments. Specific direction and precautions in usage of the instruments are given in subsequent sections for each of the various types of temperature-measurin
g instruments.
Table of Content
The purpose of this ASME Performance Test Code (PTC) is to give instructions and guidance for the accurate determination of temperature values in support of the ASME Performance Test Codes. The choice of method, instruments, required calculations, and corrections to be applied depends on the purpose of the measurement, allowable uncertainty, and characteristics of the equipment being tested. Measurement of temperature is generally considered to be one of the simplest and most accurate measurements performed in engineering. While true when compared to other measured parameters, there are many challenges. Accurate measurement of temperature can be obtained only by observance of suitable precautions in the selection, installation, and use of temperature-measuring instruments and in the proper interpretation of the results obtained with them. In some cases, an arbitrarily standardized method is prescribed in the Performance Test Codes that is to be followed in making temperature measurements under such conditions. Some of the instruments available for temperature measurement can indicate temperature to a closer degree of accuracy than is required in some of the tests considered in the Performance Test Codes. The difficulty in obtaining accurate temperature measurements with such instruments is encountered in installation or use of the temperature measuring instruments. Specific direction and precautions in usage of the instruments are given in subsequent sections for each of the various types of temperature-measuring instruments.
Table of Content
