In order to reduce overshoot to an acceptable level, KD has been increased. This decreases the settling time. Finally to obtain an error free response, KI has been increased. The effects of varying these parameters are summarized in Table 1. The experiment is carried out with maximum temperature
of 600 _C and different rates of rise of temperatures 2 _C/ min, 4 _C/min is shown in Figs. 9 and 10.