When using a multimeter to measure the resistance of a three-wire heating resistor, the value varies significantly
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When using a multimeter to measure the resistance of a three-wire heating resistor, the value varies greatly, fluctuating rapidly between 0 and 150. What’s causing this? When a different common point is used, the display works normally, but the fluctuations in the resistance measured by the multimeter are still significant.
For a three-wire system, all wires should be disconnected and the resistance measured using a multimeter separately
Should it be removed for individual measurement, or measured online? To measure a thermal resistor with a multimeter, it must be removed for individual measurement......
Is it being measured online? Try breaking the connection and measuring again; if there’s still fluctuation, it might be due to interference in the wiring.