How to connect K-type dual branch thermocouples

K-type dual thermocouple wiring method
1. What is a K-type dual branch thermocouple
Thermocouple is a commonly used temperature sensor, and K-type dual branch thermocouple is one type of it. It is composed of two wires made of different metal materials, called thermoelectric electrodes and cold electrodes, respectively. The contact points of these two electrodes are exposed to the temperature to be measured. When the temperature changes, a temperature difference will occur between the wires, resulting in a small voltage signal.
What are the wiring methods for K-type dual branch thermocouples
To use K-type dual branch thermocouples correctly, appropriate wiring methods need to be adopted. According to specific application scenarios and requirements, the following two common wiring methods can be selected:
Parallel connection is the process of connecting the thermoelectric electrodes of two K-type dual branch thermocouples in series, and then connecting the cold electrodes in series, thus forming a parallel circuit. This wiring method is suitable for situations where it is necessary to improve measurement and ensure work stability. Because parallel connection can reduce the impact of power supply resistance on measurement results and reduce the uncertainty of the measurement system.
Series connection is the sequential connection of the thermoelectric and cold electrodes of two K-type double branch thermocouples. This wiring method is suitable for situations that require measuring a large temperature range or conducting temperature measurements in special environments. Series connection can add up the voltage signals of two thermocouples, providing a larger measurement range.
3. Wiring steps for K-type dual branch thermocouples
When wiring K-type dual branch thermocouples, the following steps should be followed:
Confirm the specifications and models of the k-type dual thermocouple used, and prepare the necessary wiring materials and tools.
Clean the metal surface of the temperature point to be measured and the connecting parts to ensure good electrical contact.
Peel off the insulation layer of the wire:
Peel off the insulation layer of the wires at both ends of the dual thermocouple to expose enough exposed wires.
Connect the thermoelectric electrodes of two K-type thermocouples according to the selected wiring method and secure the connection.
Connect the cold electrodes of two K-type thermocouples according to the selected wiring method and secure the connection.
Insulate the wiring points to ensure their safety and stability.
4. Summary
K-type dual branch thermocouples are a commonly used temperature sensor, with two wiring methods: parallel and series. Parallel connection is suitable for improving measurement and stability, while series connection is suitable for measuring large temperature ranges or special environments. When wiring, it is necessary to pay attention to cleaning the wiring area, peeling off the insulation layer of the wire, correctly connecting the thermoelectric and cold electrodes, and performing insulation treatment.