28-740

## **1.Scope** 

This specification is applied to Piezo Buzzer (Self-Drive Type) 

The product describe below are used for buzzer in various alarm systems. 

## **2.Basic Condition** 

- 2.1 Rated Voltage:12VDC 

- 2.2 Operating Voltage:8~16VDC 

- 2.3 Operating Temperature Range:-20 ºC~+70 ºC 

- 2.4 Storage Temperature Range:-30ºC~+80 ºC 

## **3.Electrical Characteristics** 

- 3.1 Sound Press Level:≧90dB at 30cm / 12VDC 

- 3.2 Consumption Current:≦8mA at 12VDC 

- 3.3 Resonate Frequency:3800Hz  300Hz 

- 3.4 Tone Nature:Continuous Sound 

- 3.5 Material:ABS 

## **4.Measuring Method** 

**==> picture [326 x 126] intentionally omitted <==**

**----- Start of picture text -----**<br>
Piezo<br>Sounder<br>Decibel meter<br>12VDC 30cm<br>A<br>40cm<br>Measuring<br>Distance<br>**----- End of picture text -----**<br>


## **5.Sound Press Level & Consumption Current Curve** 

## **TEST REPORT** 

|**TEST REPORT**|**TEST REPORT**|**TEST REPORT**|**TEST REPORT**|**TEST REPORT**|**TEST REPORT**|**TEST REPORT**|**TEST REPORT**|
|---|---|---|---|---|---|---|---|
|**Product No:20EB020**<br>**Date: 2010-9-24**||||||||
|**#**|**dB**|**mA**|**Hz**|**#**|**dB**|**mA**|**Hz**|
|1|98|5.4|3926|||||
|2|99|4.2|3941|||||
|3|99|5.5|3890|||||
|以下空白||||||||
|||||||||
|||||||||
|||||||||
|||||||||
|||||||||
|||||||||
|||||||||
|||||||||
|||||||||
|||||||||
|||||||||
|||||||||
|||||||||
|||||||||
|||||||||
|||||||||
|||||||||
|||||||||
|||||||||
|||||||||
|||||||||
|||||||||
|||||||||
|**Remark:**<br>**(1)Sound Press Level**：<br>≧90dB at 30cm / 12VDC<br>**(2)Consumption Current**：≦8mA at 12VDC<br>**(3)Resonate Frequency**：3800Hz500||||||||
|**Approved BY:**陳<br>毓<br>宏<br>**Auditing BY:**陳<br>逸<br>閩<br>**Checked BY:**李<br>秋<br>蓉||||||||



## **6.Environment Test Method** 

|**NO.**|**ITEM**|**TEST CONDITION AND REQUIREMENT**|**TEST CONDITION AND REQUIREMENT**|**TEST CONDITION AND REQUIREMENT**|**TEST CONDITION AND REQUIREMENT**|**TEST CONDITION AND REQUIREMENT**|**TEST CONDITION AND REQUIREMENT**|**TEST CONDITION AND REQUIREMENT**|
|---|---|---|---|---|---|---|---|---|
|1|High Temperature<br>Test (Storage)|After being placed in a chamber with 802ºC for 96 hours and then<br>being placed in normal condition for 2 hours.<br>Allowable variation of SPL after test:10dB.|||||||
|2|Low Temperature<br>Test (Storage)|After being Placed in a chamber with -302ºC for 96 hours and<br>then being placed in normal condition for 2 hours.<br>Allowable variation of SPL after test:10dB.|||||||
|3|Humidity Test|After being Placed in a chamber with 90-95% R.H. at 402ºC for<br>96 hours and then being placed in normal condition for 2 hours.<br>Allowable variation of SPL after test:10dB.|||||||
|4|Temperature<br>Cycle<br>Test|The part shall be subjected to 5 cycles. One<br>of：<br>Allowable variation of SPL after test:10dB.<br>- 30ºC<br>+80ºC<br>+25ºC||||||cycle shall be consist<br>+25ºC|
||||||||+80ºC||
||||||||||
||||||||||
||||||||||
||||||||||
||||||||||
|||||SPL after test:10dB.|||||
|5|Drop Test|Drop on a hard wood board of 4cm thick, any directions ,6 times,<br>at the height of 100cm. Allowable variation of SPL after test:<br>10dB.|||||||
|6|Vibration Test|After being applied vibration of amplitude of 1.5mmwith 10 to 55<br>Hz band of vibration frequency to each of 3 perpendicular<br>directions for 2 hours . Allowable variation of SPL after test:10dB.|||||||
|7|Solder ability<br>Test|Lead terminals are immersed in rosin for 5 seconds and then<br>immersed in solder bath of +3005ºC for 31 seconds.90% min.<br>lead terminals shall be wet with solder (Except the edge of<br>terminals).|||||||
|8|Terminal / Wire<br>Strength<br>Pulling Test|The force of 9.8N(1.0kg) is applied to each terminal in axial<br>direction for 10 seconds. No visible damage and cutting off.|||||||



## **7.Reliability Test** 

## Continuous life test: 

250 Hours continuous operating at +70 ºC with maximum rated voltage applied . Intermittent life test: 

Aduty cycle of 1 minute on, 5 minutes off,a minimum of 10000 times at temperature +25 ºC  2 

## **8.Dimension** 

**==> picture [99 x 10] intentionally omitted <==**

**----- Start of picture text -----**<br>
Tolerance ±0.5mm<br>**----- End of picture text -----**<br>


**==> picture [99 x 15] intentionally omitted <==**

**----- Start of picture text -----**<br>
9.Packing List<br>**----- End of picture text -----**<br>