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- How to determine the polarity of the old style piezo?
1.4. How to determine the polarity of the old style piezo?
The polarity of the PZT can be determined as follows:
- Connect both poles of the connector of the PZT to an oscilloscope (time base approx. 50ms/div, y-axis 200mV/div).
- 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 .
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