3.7 first track polarity detection, the sensor chip height from the negative end of the needle guide 2-3mm, while the second track, the third track polarity detection, the sensor chip height from the negative end of the needle guide 1.5-2mm.
3.7 When the first polarity test, the height of the sensing film is 2-3mm from the end of the negative guide needle, and the height of the sensing film is 1.5-2mm from the end of the positive and negative guide needle when the second and third polarity tests.
3.7 during the first polarity test, the height of the sensing plate is 2-3mm away from the end of the negative guide pin, and during the second and third polarity tests, the height of the sensing plate is 1.5-2mm away from the end of the positive and negative guide pin.<br>