Measured values are filtered or directly saved to the data file. Measurement of Properties of Multisensor Thermocouple Probes 2.1. We designed the special apparatus for measurement and testing of the thermal properties of the multithermocouple probes. The apparatus consists of two vessels with water baths, see figure 2. The bottom of the smaller vessel partly constructed of thin Teflon membrane meets the level of the water bath of the lower vessel.
Every bath is connected with the ultrathermostat.
The accuracy of temperature setting in the baths is 0.1 oC. The large volume of the water in both baths ensures high thermal capacity and, consequently, high thermal inertia and stability. This arrangement enables us to define the sharp and constant temperature interface for the measurement of interaction between particular thermocouples in the probe and for the measurement of step response of the probe or it enables us to control the progress in the temperature in both baths for the calibration of the probe. The temperature in the baths is measured by the mercurial thermometers. Schematic diagram of the apparatus for testing. Calibration of the Thermocouples in the Probe.