Excuse me, can the tracing belt be detected by multimeter or resistance file?

The insulation resistance detection of temperature-controlled electric heat tracing mainly detects whether the electric heat tracing is damaged, and the possible problems such as short circuit and leakage of wiring, terminal wires and indirect wires. Insulation resistance test is required in the following process:

(1) Preliminary inspection: As mentioned above, it should be carried out before the installation of electric heat tracing;

(2) Acceptance: it shall be carried out before the electric tracing belt and accessories are installed and insulated;

(3) Final inspection: This inspection shall be conducted before the insulation is completed and the system is powered on.

When measuring insulation resistance, an insulation tester with a minimum voltage of DC500 V and a maximum test voltage of DC 1000V should be used. No matter how long the system is, the insulation resistance of each heat tracing loop should be at least 10 Mohm.

When they are connected across two parallel buses, they form a PTC parallel circuit with a core band. When two buses at one end of the cable are connected to the power supply, the current flows laterally from one bus to the other bus through the PTC material layer, forming a parallel loop. PTC layer is a resistance heater that is continuously connected in parallel between buses, which converts electric energy into heat energy, and carries out heat tracing and insulation for the operating system.

Extended data:

The working principle is that the heat tracing medium releases a certain amount of heat, and the loss of the heat tracing pipeline is supplemented by direct or indirect heat exchange, so as to meet the normal working requirements of temperature rise, heat preservation or antifreeze.

Electric tracing is a large-area uniform heat release along the pipeline length or tank volume, which is different from electric tracing in which the heat load is highly concentrated in one point or a small area. Electric heat tracing has small temperature gradient and long thermal stability time, which is suitable for long-term use, and the required heat (electric power) is much lower than that of electric heating.

It consists of conductive polymer (plastic), two parallel metal wires and an insulating sheath. Its characteristic is that the conductive polymer has a very high positive temperature coefficient "PTC" characteristic, which can be shortened or extended at will within a certain range, and allows multiple overlaps without worrying about high-temperature hot spots and combustion. Therefore, the above-mentioned ribbon constant temperature heater is suitable for the heated system, while the traditional constant power heater is its influence on the heated system.

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