Fault detection method for speed sensor 143.35.19

1、 Testing tools
-Multimeter (Ensure that the multimeter functions properly, the battery is fully charged, the range is appropriate, and it can accurately measure voltage)

2、 Normal state detection
1. Connect the multimeter
-Connect the black probe of the multimeter to the ground terminal (iron) of the sensor, ensuring good grounding and stable contact to avoid measurement errors caused by poor grounding.
-Connect the red probe to the signal wire of the sensor, ensuring that the signal wire is not damaged, short circuited, or disconnected, and the connection is firm.
2. Rotate the signal dial
-Rotate the signal dial slowly and evenly by hand, maintaining a certain level of force and speed during the rotation process to avoid the signal dial getting stuck or not rotating smoothly, which may affect the signal output.
-Observing the multimeter display, under normal circumstances, the voltage will fluctuate between 0.5V and 1.5V. This voltage range is a typical characteristic of signal output when the sensor is working normally, indicating that the sensor can accurately convert the rotation of the signal disk into electrical signal output.

3、 Troubleshooting
1. Inspection when there is no signal output
-Check the signal panel
-Observe whether the surface of the signal panel is covered with dust, oil stains, debris, etc., which may interfere with the generation and transmission of signals. If the signal board is very dirty, gently wipe the surface of the signal board with a clean soft cloth to remove the dirt, and then retest.
-Check the gap between sensors
-Check if the gap between the sensor and the signal panel is appropriate. If the gap is too large, it may cause the sensor to be unable to accurately sense the rotation of the signal disk, resulting in no signal output; If the gap is too small, it may cause collision or friction between the sensor and the signal board, damaging the sensor or signal board. Adjust the gap between the sensor and the signal panel to an appropriate range according to the sensor manual or technical requirements.
-Check the sensor itself
-Check the appearance of the sensor for any damage, such as cracked casing, bent or broken pins, etc. If there is obvious damage, the sensor needs to be replaced.
-Check if there is any virtual soldering, short circuit, or open circuit in the pins of the sensor. You can use the resistance range of a multimeter to measure the resistance value between sensor pins and compare it with the normal value. If the resistance value is abnormal, it may be due to internal damage to the sensor and the sensor needs to be replaced.