CUI DEVICES | MODEL: CEB-20FD64 | DESCRIPTION: PIEZOELECTRIC DIAPHRAGM

date 08/05/2022 | page 2 of 3

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MEASURING METHOD

Resonant Frequency / Resonant Impedance

The piezo electric diaphragm shall be clamped at a node point as shown in the following figure to be free from any mechanical stress, and

measured its resonant frequency and resonant impedance by using vector impedance analyzer or equivalent.

When the input frequency is swept within 100 Hz to 9 kHz, the resonant frequency is defined as the frequency where the impedance shows

the minimum value, and this impedance shall be the resonant impedance.

Static Capacitance

The electrostatic capacitance shall be measured at 1.0 kHz by using LCR meter HP4194A(H.P.) or equivalent. This part shall be clamped in

the same way as the measurement of resonant frequency and resonant impedance as mentioned above.

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