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Medusa 510/511 Series Iss.11 – 07/12
HINT ON HOW TO MEASURE THE TRUE TEMPERATURE INSIDE
THE ACCESSORIES SUPPLIED WITH THE MEDUSA SERIES
The controller of the Medusa controls and reads the temperature of the block surrounding the deep calibration well.
There are various accessories including the surface calibration insert, black body etc. These adapt the Medusa to
perform varied calibration functions.
None of these accessories actually get to the block temperature and hence the controller‟s temperature because each
accessory has a different immersion characteristic. For this reason the Medusa like all comparison baths requires a
reference thermometer to indicate the true temperature inside the accessory.
Remember the following:-
The Controller
The controller is used to set a constant temperature and create an isothermal environment for the comparison
calibration of temperature sensors.
The Reference Thermometer
The Reference Thermometer is placed in the accessory or insert and measures the true temperature inside the insert
or accessory.
The Industrial Thermometer
The Industrial thermometer is placed in the accessory or insert and is compared to the True Temperature as
indicated by the reference thermometer. An insert will typically have a 1% immersion error. For more details see -
Depths of Immersion. Tavener J. P. Volume 9.2. Isotech Journal of Thermometry pages 79-87.
