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- J-Type Thermocouple
- Iron-constantan thermocouple with a temperature range of 0° to 750°C.
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- Joint Industrial Standards (JIS)
- A Japanese agency that establishes and maintains
standards for equipment and components. Also known as JISC,
its function is similar to Germany's Deutsche Industrial
Norm (DIN).
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- Junction
- The point where two dissimilar metal conductors join to
form a thermocouple.
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- Junction, Cold
- Connection point between thermocouple metals and the
electronic instrument. See reference junction.
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- Junction, Exposed
- A type of thermocouple probe in which the hot, or
measuring, junction protrudes beyond the sheath material and
is fully exposed to the substance being measured. It usually
gives the fastest response time. No electrical isolation
provided.
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- Junction, Grounded
- Type of thermocouple probe in which the hot, or
measuring junction, is an integral part of the sheath
material. No electrical isolation is provided.
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- Junction, Hot
- The thermocouple junction that is affixed to or inserted
into the material being measured. Also called the measuring
junction.
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- Junction, Isolated
- A form of thermocouple probe construction in which the
measuring junction is fully enclosed in a protective sheath
and electrically isolated from it. Commonly called an
ungrounded junction.
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- Junction, Reference
- The junction in a thermocouple circuit held at a stable,
known temperature (cold junction). Standard reference
temperature is 32ºF (0ºC).
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