APS
-
9301
Rr
APS-9501U
Rr
APS
-
9102
ser's
Manual
6.
Circuit Principle
The 4PS series products are controlled by CPU and operated via keyboard.
The APS series are fully digital controlled.
The input isolate transformer has bee applied to isolate the city power from
the AFS series. And step down the input voltage for appropriate applications.
The main
AC
vou7er
is
rectified and filtered to become a very smooth
DC
source for power amplifier. Sine ware form is generated by the digital
synthesizer and filtered by a
very high impedance filter. Therefore, the sine
ware
fxm will be very stable and the distortion will be reduced.
The
APS
series have two voltage feedback systems. One is analog feedback
systen- for quick response(within loous), and the regulation will be located
In the
-ange of
k5Q.
The other is digital feedback system. The system will
read
tl-e output voltage and compare with the settings. The accuracy of
Outpu voltaze will be limited in the range of
+
0.1V.
The si-ie wave siynal is amplified by power amplifier. The power amplifier
pl-ovidzs a very clean and low distortion sine ware to the output of
APS
series through the output transformer. The offset and calibration data of
inst~~ul-lentation are stored in the EEPROM. The instrumentation would be
Calibrated automatically when the APS series is switched on.
Tiue RMS
circuit
is applied for the voltmeter and ammeter. The value of
LED
display
is
true RMS value.
For
ezsy operation. the APS series equips
a
memory of EEPROM. The
EEPROM will memorize the latest settings data automatically after the APS
Series
have been switched off. If the APS series is switched on again, the
CPU
cauld read all the data from the EEPROM and provide the output value
same
as
the previous setting. It is unnecessary to reset the data after APS
serie: ;Ire switched off.
APS
-
9301
&
APS
-
9501U
&
APS
-
9102
ser's hlanual
7.
Block
Diagram
p?-J~~
el
Transformer
Amplifier
pF-,ij-bl
p;
Sine ware
Synthesizer
Frequency
Sensor
Cun-ent
B-
Voltage
Voltage
Sensor
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