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Part No: CEB-20D64 Description: piezo electric diaphragm
Date: 7/28/2006 Unit: mm Page No: 1 of 4
Specifications
Maximum input voltage Resonant frequency Resonant impedance Electrostatic capacitance Operating temperature Storage temperature Dimensions Weight Material Terminal DC resistance 30 Vp-p 6.5 0.5 KHz 350 max. 13,000 30% pF -20 ~ +70 C -30 ~ +80 C O20.0 x H0.43 mm 1.50 g max. Brass Wire type 20 M min. see Measurement Methods see Measurement Methods at 120 Hz / 1 V
Fluke 45 rate: Fast Measurement time: 1 second (only for 20 mm test)
RoHS
yes
Appearance Drawing
Tolerance: 0.5
Phone: 800.275.4899
Fax: 503.612.2381
www.cui.com
20050 SW 112th Ave.
Tualatin, OR 97062
Part No: CEB-20D64 Description: piezo electric diaphragm
Date: 7/28/2006 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 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.
Mechanical Characteristics
Item Solderability (Connector excepted) Lead Wire Pull Strength Vibration Evaluation Standard Test Condition 90% min. of the stripped wires Stripped wires of lead wires are immersed in will be wet with solder. (Except rosin for 5 seconds and then immersed in the edge of the terminal) solder bath of 270 5C for 3 0.5 seconds. No damage or cutting off. The horizontal force of 3.0N (0.306kg) should be applied to the double lead wire for 30 sec. The value of the resonant The diaphragm should be measured after frequency should be 10% of the applying a vibration amplitude of 1.5 mm with 10 to 55 Hz band of vibration frequency to each initial measurements. Electrostatic capacitance should of the 3 perpendicular directions for 2 hours. be 20% compared with the initial measurement. The SPL should be within 10dB compared with the initial measurement.
Phone: 800.275.4899
Fax: 503.612.2381
www.cui.com
20050 SW 112th Ave.
Tualatin, OR 97062
Part No: CEB-20D64 Description: piezo electric diaphragm
Date: 7/28/2006 Unit: mm Page No: 3 of 4
Environment Test
Item High temp. test Low temp. test Humidity test Temp. cycle test Test Condition After being placed in a chamber at +80C for 240 hours. After being placed in a chamber at -30C for 240 hours. After being placed in a chamber at +40C and 905% relative humidity for 240 hours. The part shall be subjected to 5 cycles. One cycle will consist of: Evaluation Standard
The diaphragm will be measured after being placed at +25C for 4 hours. The value of the resonant frequency should be 10%, the value of the electro static capacitance should be 20% compared to the initial measurements. The resonant impedance should be 2,000 max.
Test Conditions
Standard Test Condition Judgement Test Condition a) Tempurature: +5 ~ +35C a) Tempurature: +25 2C b) Humidity: 45 - 85% b) Humidity: 60 - 70% c) Pressure: 860-1060 mbar c) Pressure: 860-1060 mbar
Phone: 800.275.4899
Fax: 503.612.2381
www.cui.com
20050 SW 112th Ave.
Tualatin, OR 97062
Part No: CEB-20D64 Description: piezo electric diaphragm
Date: 7/28/2006 Unit: mm Page No: 4 of 4
Packaging
Phone: 800.275.4899
Fax: 503.612.2381
www.cui.com
20050 SW 112th Ave.
Tualatin, OR 97062

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