| 摘要 |
PURPOSE:To enhance operability, by providing a power control part wherein display content is cleared at every signal for turning a switch from an OFF-state to an ON-state to start temp. detecting operation and a time is measured while a power source is turned OFF after a definite time was elapsed. CONSTITUTION:An input circuit 1 converts ON and OFF of a switch SW to digital signals to output said signals and a temp. detection part 2 starts temp. detecting operation by the digital ON-signal to digitally convert the resistance value of a temp. sensitive element RT to a numerical value and not only hold the max. numerical value but also outputs the same to a display part 4 by a re-start signal. A power control part 3 turns a power source E ON by turning the switch SW ON and sends power to the temp. detecting part 2 and a display part 4 and automatically cuts power after a predetermined time (about 10min) was elapsed. Further, said control part 3 always supplies a power source to a part of the input circuit 1. By this mechanism, power consumption can be conserved and the operability of the re-start in the detection of temp. is improved. |
