CEB-27FD44 Datasheet, PDF (2/4 Pages) CUI INC – piezo electric diaphragm

Part No: CEB-27FD44
Description: piezo electric diaphragm
Date: 6/25/2007
Unit: mm
Page No: 2 of 4
Measuring Methods
1) Resonant frequency / Resonant impedance
The piezo electric diaphragm should be clamped at a node point (as shown in the following figure) to be free from any
mechanical stress. Measure its resonant frequency and resonant impedance by using a vector impedance analyzer or
equivalent.
When the input frequency is swept within 100 Hz to 5 KHz, the resonant frequency is defined as the frequency where
the impedance shows minimum value. This impedance should be the resonant impedance.
2) Static capacitance
The electrostatic capacitance should be measured at 120 Hz by using an L.C.R. meter (ex. HP4194A(H.P.)) or
equivalent. The part should be clamped in the same way as the measurement or resonant frequency / resonant
impedance mentioned above.
Mechanical Characteristics
Item
Solderability
Lead Wire Pull Strength
Vibration
Test Condition
Evaluation Standard
Stripped wires of lead wires are immersed in 90% min. of the stripped wires
rosin for 5 seconds and then immersed in
will be wet with solder.
solder bath of 270 ±5°C for 3 ±0.5 seconds. (Except the edge of the terminal)
The horizontal force of 3.0N (0.306kg) should No damage or cutting off.
be applied to the double lead wire for 30 sec.
The diaphragm should be measured after
The value of the resonant
applying a vibration amplitude of 1.5 mm with frequency should be ±10% of the
10 to 55 Hz band of vibration frequency to each initial measurements.
of the 3 perpendicular directions for 2 hours. Electrostatic capacitance should
be ±20% compared with the initial
measurement. The resonant
impedance should be 2000Ω
max.
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