Part No: CEB-20D64

Description: piezo electric diaphragm

Phone: 800.275.4899

Fax: 503.612.2381

www.cui.com

20050 SW 112th Ave.

Tualatin, OR 97062

Date: 7/28/2006

Unit: mm

Page No: 2 of 4

Mechanical Characteristics

Item

Test Condition

Solderability

Stripped wires of lead wires are immersed in

(Connector excepted)

rosin for 5 seconds and then immersed in

solder bath of 270 ±5°C for 3 ±0.5 seconds.

Lead Wire Pull Strength

The horizontal force of 3.0N (0.306kg) should

be applied to the double lead wire for 30 sec.

Vibration

The diaphragm should be measured after

applying a vibration amplitude of 1.5 mm with

10 to 55 Hz band of vibration frequency to each

of the 3 perpendicular directions for 2 hours.

Evaluation Standard

90% min. of the stripped wires

will be wet with solder. (Except

the edge of the terminal)

No damage or cutting off.

The value of the resonant

frequency should be ±10% of the

initial measurements.

Electrostatic capacitance should

be ±20% compared with the initial

measurement. The SPL should

be within ±10dB compared

with the initial measurement.

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 2 KHz to 8 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.