Current verificationExplosion proof thermocoupleThe method is to place the standard explosion-proof thermocouple on a high aluminum protective tube, and bundle it with a thin nickel chromium wire to form a circular bundle with a diameter of no more than 20mm. When bundling, the measuring end of the tested explosion-proof thermocouple should be evenly distributed around the measuring end of the standard explosion-proof thermocouple and placed on the same section of the vertical standard explosion-proof thermocouple. Install the bundled explosion-proof thermocouples into the calibration furnace, with the measuring end of the thermocouple located at the center of the high-temperature zone of the calibration furnace; The standard explosion-proof thermocouple should be aligned with the axis position of the calibration furnace.

In frequentExplosion proof thermocoupleDuring the verification process, the standard explosion-proof thermocouple must be tied together with the tested explosion-proof thermocouple every time. Repeated contact can easily cause contamination of the standard explosion-proof thermocouple, leading to a decrease in its stability and affecting the accuracy of the measurement results. Furthermore, after each bundling, it is necessary to rewire the wires. Frequent wiring and pulling can easily damage the standard explosion-proof thermocouple, causing it to break and affect its accuracy, shortening its service life. After the above introduction, when we use explosion-proof thermocouples, we need to further study and evaluate the process, and carefully consider the effectiveness of each detail.

When identifying explosion-proof thermocouples, we must pay attention to avoiding contamination as much as possible and avoiding the frequency of wiring. Although explosion-proof thermocouples need to be tested during use, they also need to be tested before use. Being careful is always right.

If an explosion-proof thermocouple is composed of two homogeneous conductors (thermoelectric electrodes) with different compositions in a closed circuit, when there is a temperature gradient at both ends, a current flows through the explosion-proof thermocouple in the circuit, and there is a thermoelectric potential between the two ends. The explosion-proof principle of explosion-proof thermocouples is based on the principle of gap explosion-proof, designing junction boxes and other components with sufficient strength to seal all parts that can generate sparks, arcs, and dangerous temperatures inside the junction box. When an explosion occurs inside the chamber, the explosion-proof thermocouple can extinguish and cool through the gap between the joint surfaces, preventing the flame and temperature after the explosion from being transmitted outside the chamber.