BeStar FT-20T-4.3A1 - Manual (Page 5)

5.4.Measureing Condition:
Parts shall be measured under a condition(Temperature:+5°C to +35°C,Humidity:45 to 85% R.H.)
unless the standard condition(Temperature:+25± 3°C,Humidity:60± 10%R.H.)is regulated to
measure.
DRG NO: BS/TEY01.256B
A
Date
6
Rev.
5
Drawn
www.be-star.com [email protected]
4
Approved by: Note
3
张秀琴
08/06/16 B 赵 峥
B
Drawn by:
Checked by:
Date:
李红元
赵 峥
08/06/16
Piezo Ceramic Element
A
Page:4 of 7
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FT-20T-4.3A1
B
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5.3.Insulation Resistance:
An insulation resistance shall be measured by using an insulation resistance meter,suach as DF2863
insulation resistance meter.
C
D
C
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5.2.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 .
E
F
E
F
5.1.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
G
5.Measuring Method
FT-20T-4.3A1
H
6 5 4 3
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