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CEB-20D64 Datasheet(PDF) 2 Page - CUI INC |
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CEB-20D64 Datasheet(HTML) 2 Page - CUI INC |
2 / 4 page 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. |
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