Working principle of intelligent digital display regulator

How does the intelligent digital display regulator work? The intelligent digital display regulator has a normally open to normally closed, and normally closed to normally open trigger. Take the measurement of liquid level as an example, after setting the upper and lower limit liquid levels. When the alarm setting value is exceeded, the peak buzzer needs to sound, and a rated signal source is provided to the peak buzzer through the normally open contact. In this way, when the measured value reaches the set alarm value, the normally open contact becomes normally closed (equivalent to the switch being closed), and the peak buzzer sounds. The upper limit and the lower limit are two independent contacts, which are actually based on the process requirements. What action is required when the upper limit is reached, then the corresponding upper limit contact is connected. The same is true when it reaches the lower limit, and the corresponding contact is connected to what action is required. (Remember, a pair of contacts is equivalent to a switch, each pair of contacts has a center point, a normally closed point, and a normally open point). The intelligent digital display instrument can also set both contacts to the upper limit alarm or the lower limit alarm. The temperature control of the intelligent digital display regulator is actually the same as the principle of liquid level control. The upper and lower limits of the temperature are set. When the temperature is higher than the set value, the heating is stopped. When the actual temperature is lower than the set value, the system sends a heating command signal. There are many similar control systems. I will not describe them here.

Why is there an error between the temperature displayed by the intelligent digital display regulator and the actual measured temperature? According to years of application experience, there are mainly the following aspects. 1. The graduation number of the configured temperature sensor does not match the graduation number of the instrument. 2. The sensor has poor contact, poor installation, and short circuit. (end)