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Calibration by means of an external working standard thermometer
These WIKA working standard thermometers are particularly suited for applications in industrial laboratories. Here they enable easy comparative calibration in our baths, in our tube furnace and in our dry block calibrators.
The use of an external reference thermometer is recommended, particularly for the calibration of short temperature sensors. Therefore the errors due to the radial and axial temperature distribution in the temperature conditioning unit are considerably reduced.
For calibration, the test specimens and the working standard thermometer are brought to the same temperature in a temperature conditioning unit.
As soon as a stable temperature is reached, the test specimens are read or their output signals are measured (resistance, thermoelectric voltage, standard signal) and compared with the working standard thermometer. Using this comparison method, the measuring uncertainty can be considerably reduced because not only the display of the temperature conditioning unit is taken into consideration.
Remarks
- Type of thermocouple:
Type S
- Stability:
< 0,5K after 250°C @ 1300°C
- Material of thermowell stem:
Ceramic C 799
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