Manual

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李红元
Drawn
6
A
Date
Rev.
08/05/19A
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李红元
Drawn by:
程久生
耿 亚
www.be-star.com [e-mail]
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Note
Approved by:
Checked by:
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Piezo Ceramic Element
BDRG NO: BS/TEY01.250A
Page:3 of 7
08/05/19
Date:
FT-20T-5.6A1
This print and information there in are proprietary to Bestar Electronics Industry Co., Ltd.
and shall not be used in whole or in part without its written content
3.3.Insulation Resistance:
An insulation resistance shall be measured by using an insulation resistance
meter,suach as DF2863 insulation resistance meter.
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3.2.Capacitance:
An electrostatic capacity capacitance shall be measured at 120Hz by using LCR meter, such as DF2812A
LCR numerical bridge or equivalent.the part shall be clamped at the node .
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FT-20T-5 6A1
3.1.Resonant Frequency/Resonant Impedance
piezoelectric diaphragm shall be clamped at a node point as shown in following figure to be free from any
mechanical stress,and measured its resonant frequency and resonant impedance by using
YW2788 synthesis parameter test apparatus or equivalent
3.Measuring Method
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