利用可调电阻调节电压作为模拟温度的输入量，当温度低于30℃时，扬声器发出长“嘀”报警和蓝光报警，当温度高于60℃时，发出短“嘀”报警和红光报警。测量的温度范围在0～250℃，并能实时显示当前温度值。-Use adjustable resistance adjust voltage as the input variables and simulated temperature when temperature is below 30 ℃, the speaker sends out the long "di" alarm and blu-ray alarm, when the temperature above 60 ℃, issued a short "di" alarm and red alarm. Measurement of the temperature range in 0 ~ 250 ℃, and can real-time display current value.