Landcal Blackbody Source
Type P1600B2
User Guide
Page 20
8 Calibration of Thermocouples
8.1 Introduction
Uniform temperature conditions are achieved along the length of the cavity,
which allows the furnace to be used also for the calibration of thermocouples by
the comparison method. This method consists of comparing the thermocouple
under test with a standard thermocouple, the calibration of which is traceable to
National Standards.
In addition to a uniform temperature source, basic equipment requirements are
a set of standard thermocouples, a reference (cold junction) source and a digital
voltmeter, for measuring the outputs from the thermocouples.
8.2 Thermocouple Calibration
1) Place the test and standard thermocouples in close proximity in the uniform
temperature zone of the furnace.
2) Allow the thermocouples to 'soak' at temperature and note the readings of
the output.
3) The test thermocouple is compared directly with the standard.
