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AD2821A OPERATION MANUAL
Circuit Mode：
Dissipation：
Parallel:
Here parameter with subscript s means the series mode,
parameter with subscript p means the parallel mode.
4.
From the above equations, we can conclude that the conversion
between series and parallel is determined by D
2
2
The value of D
or Q
directly determined the parameter values in
different circuit mode.
Example:
Three capacitors have the same series capacitance: Cs=0.1µF, but
their dissipations are different with each other: D1=0.0100,
D2=0.1000, D3=1.0000. According to the above equation, we can
get their capacitance in parallel mode:
Cp1 = 0.09999 µF
Cp2 = 0.09901 µF
Cp3 = 0.05000 µF
We can find that Cs is almost the same with Cp when D is very
small (Ｄ< 0.01), but when D is more than 0.01，Cp and Cs are
different obviously. For example: When D = 0.1，the difference is
1%，but when D = 1，the difference is almost 50%.
3. Alarm Setup
l
Press
key to select the second function, "SHIFT"
will be lighted on the screen.
l
Press BUZZER, the following information will be
displayed on the LCD screen：
Lp
Rp
R
1
S
D
=
=
2
fL
Q
π
S
2
L
1 (
D
)
L
=
+
P
S
2
2
R
R
1 (
D
)
D
=
+
P
S
2
2
or Q
（Q=1/D）.
57
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