Date: 7/28/2006 Part No: CEB-27D44 Unit: mm Description: piezo electric diaphragm Page No: 1 of 4 Specifications Maximum input voltage 20 Vp-p Resonant frequency 4.6 ± 0.5 KHz see Measurement Methods Resonant impedance 250 Ω max. see Measurement Methods Electrostatic capacitance 16,000 ±30% pF at 1 KHz / 1 V Operating temperature -20 ~ +70° C Storage temperature -30 ~ +80° C Dimensions Ø27.0 x H0.51 mm Weight 2.0 g max. Material Brass Terminal Wire type DC resistance 20 M Ω min. 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 Date: 7/28/2006 Part No: CEB-27D44 Unit: mm Description: piezo electric diaphragm 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 7 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 1 KHz 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 Test Condition Evaluation Standard Solderability Stripped wires of lead wires are immersed in 90% min. of the stripped wires (Connector excepted) rosin for 5 seconds and then immersed in will be wet with solder. (Except solder bath of 270 ±5°C for 3 ±0.5 seconds. the edge of the terminal) Lead Wire Pull Strength The horizontal force of 3.0N (0.306kg) should No damage or cutting off. be applied to the double lead wire for 30 sec. Vibration 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 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 Date: 7/28/2006 Part No: CEB-27D44 Unit: mm Description: piezo electric diaphragm Page No: 3 of 4 Environment Test Item Test Condition Evaluation Standard High temp. test After being placed in a chamber at +80°C for 240 hours. Low temp. test After being placed in a chamber at -30°C for 240 hours. Humidity test After being placed in a chamber at +40°C and 90±5% relative humidity for 240 hours. The diaphragm will be measured Temp. cycle test The part shall be subjected to 5 cycles. One after being placed at +25°C for 4 cycle will consist of: 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 Ω max. Test Conditions Standard Test Condition a) Tempurature: +5 ~ +35°C b) Humidity: 45 - 85% c) Pressure: 860-1060 mbar Judgement Test Condition a) Tempurature: +25 ±2°C b) Humidity: 60 - 70% c) Pressure: 860-1060 mbar Phone: 800.275.4899 Fax: 503.612.2381 www.cui.com 20050 SW 112th Ave. Tualatin, OR 97062 Date: 7/28/2006 Part No: CEB-27D44 Unit: mm Description: piezo electric diaphragm Page No: 4 of 4 Packaging Phone: 800.275.4899 Fax: 503.612.2381 www.cui.com 20050 SW 112th Ave. Tualatin, OR 97062