1.1. How to determine the polarity of the old style piezo?

The polarity of the PZT can be determined as follows:

  1. Connect both poles of the connector of the PZT to an oscilloscope (time base approx. 50ms/div, y-axis 200mV/div).
  2. Slightly tap the head of the PZT with your finger. As a result you should get a voltage pulse on the oscilloscope. 
  • Positive Amplitude¬† -> + pole of the piezo is connected to the inner conductor of the oscilloscope BNC connector .
  • Negative Amplitude¬†-> + pole of the piezo is connected to the outer conductor of the oscilloscope BNC connector .

Knowledge Tags
DL 100  /  Piezo  / 

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