SAE INTERNATIONAL AMS2750™F Page 10 of 54
2.2.75 TEMPERATURE SENSOR PASS-THROUGH
Installed wiring connecting sensors (typically thermocouples) inside the thermal processing equipment to the
instrumentation outside, usually with sockets, jacks, or terminals at each end.
2.2.76 TEMPERATURE UNIFORMITY
The temperature variation (usually expressed as ± degrees) within the qualified work zone with respect to set point
temperature. For retort furnaces where a sensor in the retort is used to control temperature, the temperature variation is
with respect to the sensor in the retort and not to the furnace set point temperature. The requirement is established by the
required thermal processing equipment class in accordance with Table 11.
2.2.77 TEMPERATURE UNIFORMITY RECORDER
Independent digital recording instrument meeting the requirements of Table 7 for a field test Instrument and used to perform
temperature uniformity surveys.
2.2.78 TEMPERATURE UNIFORMITY SENSOR
A calibrated and traceable sensor meeting the requirements of Table 1.
2.2.79 TEMPERATURE UNIFORMITY SURVEY (TUS)
An assessment of the temperature variation within the qualified work zone of thermal processing equipment prior to and
after stabilization using a field test instrument (TUS recorder) meeting Table 7 requirements and sensors meeting the
requirements of Tables 1, 20, and 21, as applicable.
2.2.80 THERMAL PROCESSING
Any process in which materials are exposed to controlled heating, soaking, or cooling to achieve the specified properties or
condition of the material or part for which there is no exception in accordance with 1.3.
2.2.81 THERMAL PROCESSING EQUIPMENT
A term used to refer to any vessel (such as autoclave, furnace, oven, refrigeration equipment, liquid bath, heated press,
etc.) used to process materials at controlled temperatures.
2.2.82 THERMOCOUPLE
A temperature sensor consisting of two wires of dissimilar thermoelectric characteristics connected at a measuring junction,
An EMF is developed between the two junctions in proportion to the temperature gradient.
2.2.83 TRACEABLE OR TRACEABILITY
The ability to relate measurement results through an unbroken chain traceable to the International System of Units (SI)
through internationally recognized standards organizations such as, but not limited to:
National Institute of Standards and Technology (NIST)
National Physical Laboratory (NPL)
Physikalisch-Technische Bundesanstalt (PTB)
Swedish National Authority for Testing, Inspection, and Metrology
China National Calibration Technology Specification (CNAS)
National Institute of Advanced Industrial Science and Technology (AIST)
Instituto Nacional de Metrologia, Normalização e Qualidade Industrial (INMETRO)
Bureau International des Poids et Mesures (BIPM)
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