国产精品午夜片在线观看

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How to analyz the waveform of cable fault detection?

Release Time:2020-09-15 Share:

Standard waveform of open fault

微信圖片_20200915115633.png

Analysis: t1 refers to pulse wave shape of the flash tester and has positive polarity (it can also be negative ); t2 refers to cable center butt joint reflective pulse wave shape (the reflective wave of joint has the same polarity in general; but it is related to the joint structure); t3 refers to reflective pulse wave shape of open route malfunction and has positive polarity. It refers to reflection with same polarity (polarity of malfunction wave shape is same as pulse wave polarity of instrument); t4 refers to second reflective pulse wave shape of open route malfunction. Given the attenuation of pulse wave, second reflection ratio of t4 is smaller than one-time reflective wave amplitude of t3. The distance S between malfunction point and measurement end is as follows: During the real operation, the instrument will automatically display and calculate the distance of malfunction point by moving the cursor.


Standard waveform of low  resistance

微信圖片_20200915115802.png

Analysis: t1 refers to pulse wave shape of the flash tester and has positive polarity (it can also be negative ); t2 refers to cable center butt joint reflective pulse wave shape; t3 refers to reflective wave shape of low resistance malfunction point and has negative polarity. It refers to counter-polarity reflection (contrary to the pulse wave polarity of instrument); t4 refers to reflective wave shape of cable terminal. The distance S between malfunction point and measurement terminal is as follows:


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国产精品午夜片在线观看
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