BeStar FT-27T-4.6A1 - Manual (Page 5)

Note Date Drawn Rev.
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www.be-star.com [email protected]
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DRG NO: BS/TEY01.271A
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Page:05 of 08
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.
A
B
09/03/10
赵 峥
汤浩君
李红元
Date:
Checked by:
Approved by:
Drawn by:
FT-27T-4.6A1
Piezo Ceramic Element A
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
D
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
FT-27T-4.6A1
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
5.Measuring Method
G
H
6
G
3 5 4 2 1
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