Equipped with transmitterBimetallic thermometer manufacturerIt is developed from sensors, any sensor that can output standard signals. A standard signal refers to a signal whose form and quantity range of physical quantities conform to international standards. Due to the advantages of being unaffected by inductance, capacitance, and load properties in the circuit, and without phase shift issues, the Electrotechnical Commission (IEC) has established 4mA~20mA (DC) current signal and 1V~5V (DC) voltage signal as the unified standards for analog signals in process control systems.

composition principle

The transmitter operates based on the principle of negative feedback and is mainly composed of a measuring part, an amplifier, and a feedback part.

The measuring part is used to detect the measured variable x and convert it into an input signal Zi (voltage, current, displacement, force or torque, etc.) that can be accepted by the amplifier. The feedback section converts the output signal y of the transmitter into a feedback signal Zf, which is then sent back to the input terminal. The algebraic sum of Zi and the zeroing signal Zo is compared with the feedback signal Zf, and the difference ε is sent to the amplifier for amplification and converted into the standard output signal y.

effector function

The function of a transmitter is to detect process parameters and transmit the measured values in a specific signal form for display and adjustment.

The function of automatic detection and regulation system is to convert various process parameters such as temperature, pressure, flow rate, liquid level, composition and other physical quantities into a unified standard signal, and then transmit it to the regulator and indicator recorder for adjustment, indication and recording.