5. THERMOCOUPLE CALIBRATION
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For example: the boiling point of oxygen or the freezing point of
mercury. In determining the EMF of a thermocouple at freezing
point, the time during dissertation which observations may be
taken is limited to the period of freezing, after which the material
must be melted again before taking futher observations. In case
of boiling points, there is no such limit in since the material can
be boiled continiously.
This brochure attempted to summarize the important aspects of
thermocouple temperature sensors. It has primarily been aimed
at the industrial user in order to help him understand more fully
the basic principles of thermocouples. The feld of temperature
measurement is so vast, that each topic could have been a
brochure itself.
We have briefy described the theoretical foundation of the ther-
mocouple thermometry aspect, the basic construction of the
thermocouples, two methods of calibration and the critical pa-
rameters to be considered in the selection of practical sensors.
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