The proposed setup must be calibrated prior to using it as a temperature source. The calibration process involves determining the steady-state temperature of the copper plate for a series of given voltages applied to the TEC. The calibration process was conducted in two parts. In the first part we calibrated our setup as a hot source(higher than room temperature). This involved attaching a k-type thermocouple to the centre of the copper plate and recording the increase in temperaturc using a data logger until a steady-state condition was reached. Temperature measurements were taken at a rate of 2 Hz for voltages of 1, 3, 5, 7, and 9 VDC applied to the TEC. We did not go beyond 9 V as the TEC module started to draw a current higher than the power supply's limit of 4A. The results are illustrated in figure 3. Each test was done starting at room temperature. The results indicated that between 200 and 300 s after heating the copper plate, the temperature increase remained within a maximum of 1.5 °C. In the interest of time, we stopped recording the temperatures of the copper plate at 300 s and assumed the last recorded value as the steady-state temperature.